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Smart Electrician<br />

The Internet of Things for Electricians<br />

Smart Electrician magazine | 2016 ISSUE 03<br />

Helping<br />

electrical<br />

contractors<br />

to benefit from the<br />

<strong>energy</strong> efficiency issue<br />

Sustainable<br />

<strong>energy</strong><br />

& the latest state of the technologies<br />

Smart homes<br />

are a key element of the<br />

electricity industry<br />

Solar PV systems<br />

& how to install them<br />

10<br />

new trends<br />

that will impact<br />

green buildings


THIS<br />

IS MORE<br />

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All things ‘green’… and there’s money to be made!<br />

Leading climate scientists have only just warned that our world is dangerously<br />

near exceeding the 1.5oC upper limit for global warming, a mere eight months<br />

after this target was established at the Paris climate summit. The negotiations,<br />

deemed highly successful at the time, went further than the previously held 2oC<br />

limit beyond which climate change would start to become catastrophic – and<br />

possibly irreversible.<br />

Smart Electrician<br />

The Internet of Things for Electricians<br />

The reasons are clear – the world is simply not de-carbonising fast enough.<br />

At Smart Electrician, we have a mandate to look at all things high-tech<br />

electrotechnical, including – of course – the burgeoning Internet of Things (IoT)<br />

sector. However, we also include the latest sustainable technologies, not least<br />

because we all (presumably) want to save our world, but also because there’s<br />

money to be made in saving <strong>energy</strong> and installing the systems.<br />

Sustainable<br />

<strong>energy</strong><br />

& the latest state of the technologies<br />

Smart homes<br />

are a key element of the<br />

electricity industry<br />

Solar PV systems<br />

& how to install them<br />

10<br />

Helping<br />

electrical<br />

contractors<br />

to benefit from the<br />

<strong>energy</strong> efficiency issue<br />

new trends<br />

that will impact<br />

green buildings<br />

So, we come to this issue, which a cursory glance at page 7 will show is largely<br />

devoted to sustainable homes and buildings (which are also smart) and improving <strong>energy</strong> efficiency using the<br />

latest ‘green’ technologies.<br />

But first, back to that pesky 1.5oC limit, already so close to being exceeded. To avoid global warming catastrophe,<br />

the world will have to decarbonise at some speed, to the extent that the world must have no coal-fired power<br />

stations at all by 2025. That’s not all – by 2030 the internal combustion engine will need to be finished, whatever<br />

the Jeremy Clarksons of this world think. Even these measures will apparently not guarantee a rise of no more than<br />

1.5oC, yet the task is enormous – especially as while the IoT can help save lots of <strong>energy</strong>, the billions of electronic<br />

devices of which it is comprised also use increasing amounts of electrical <strong>energy</strong>.<br />

Still, all this means that increasingly clever use of the IoT in smart homes, buildings, grids and sustainable devolved<br />

power generation will also be critical in keeping to the 1.5oC limit. And for smart electricians all of this means extra<br />

work, and lots of it for many years. Better get smarter still….and fast…<br />

So, in this issue of Smart Electrician, we bring you a veritable smorgasbord of latest ‘green’ trends and technologies<br />

– the renewables and electricity markets, the benefits for smart electricians, sustainable <strong>energy</strong> and smart controls,<br />

smart homes and grids, solar PV power generation (and how to install it), <strong>energy</strong> saving electrical protection and<br />

ventilation efficiency.<br />

That’s not all, as we also cover a method of sending electrical <strong>energy</strong> over data lines to drive small machines<br />

and devices. This, Power over Ethernet (PoE), has been around for years in industry, but to date even many smart<br />

electricians are not fully aware of it - so take a look….<br />

….have fun!<br />

If you are not a member of the Voltimum community sign up for free today at www.voltimum.co.uk<br />

PRINT & DISTRIBUTION<br />

Voltimum UK & Ireland Ltd<br />

e: enquiries@voltimum.co.uk<br />

t: 020 7751 3900<br />

SALES & ADVERTISING<br />

Amy Latchana<br />

e: amy.latchana@voltimum.com<br />

t: 020 7751 3902<br />

DESIGN, EDITORIAL & NEWS<br />

Soraia Antunes<br />

e: soraia.antunes@voltimum.com<br />

t: 020 7751 3906


CONTENTS<br />

7<br />

12 14<br />

Sustainable <strong>energy</strong> and the latest<br />

state of the technologies<br />

‘Green’ technologies and sustainable<br />

homes are crucial n the fight to<br />

reduce CO2 emissions to atmosphere,<br />

save <strong>energy</strong>, save money and<br />

provide real business opportunities.<br />

Ten new trends that will affect<br />

green buildings<br />

These 10 trends distill SE’s thinking<br />

about many issues over the past year<br />

and forecasts what will shape the<br />

sustainable development agenda in<br />

the next year.<br />

Future ambitions, future markets<br />

The renewable <strong>energy</strong> industry has<br />

had a turbulent 12 months. Too many<br />

initiatives have either been cancelled<br />

or simply have collapsed. One ray of<br />

sunshine is the commercial sector and<br />

solar PV.<br />

16 20 22<br />

Helping electrical contractors to<br />

benefit from the <strong>energy</strong><br />

efficiency issue<br />

As more organisations switch onto the<br />

benefits of <strong>energy</strong> saving and face<br />

the pressure to comply, Schneider<br />

Electric discusses the options.<br />

PIR controls in commercial<br />

lighting applications<br />

PIR controls are becoming the norm.<br />

However, areas where luminaires are<br />

controlled by a wall switch are greatly<br />

outnumbered by those incorporating<br />

something a bit more involved.<br />

PEC boosted grid must cope with ten<br />

million solar homes<br />

Companies are participating in<br />

the government’s £9.5m initiative<br />

to modernise the UK’s <strong>energy</strong><br />

infrastructure so that it will be able to<br />

accommodate millions of homes.<br />

25 29 30<br />

Solar PV systems<br />

and how to install them<br />

The greatly increased use solar PV<br />

panels has been a great success over<br />

recent years, Smart Electrician takes<br />

a look at the associated installation<br />

equipment and techniques.<br />

Why have two types of wiring to<br />

operate a network device?<br />

This seemingly trivial question is<br />

creating a promising debate and<br />

laying the foundation of an industry<br />

with interesting possibilities in the<br />

future, generically called PoE.<br />

Smart homes are a key element of the<br />

electricity industry<br />

Smart Homes are integral<br />

components of smart grids, but result<br />

in rising electricity consumption.<br />

Their successful integration must be<br />

facilitated with the help of installers.<br />

32 35 36<br />

New buildings containing green<br />

technology - RCD specification<br />

Domestic, commercial and public<br />

buildings designed to meet the latest<br />

<strong>energy</strong> standards can contain a<br />

range of <strong>energy</strong> saving devices and<br />

technology, Doepke lists them all.<br />

Smart efficiency<br />

Ventilation has been raising the bar<br />

on efficiency, but now it is smarter<br />

too with a host of clever features<br />

that benefit installers and households<br />

alike. Vent-Axia’s Product Marketing<br />

Manager Ian Mitchell, explains.<br />

IEA study calls for electricity<br />

market reinvention<br />

Electricity markets are currently<br />

undergoing a vast transformation. To<br />

ensure electricity sustainability, a new<br />

International Energy Agency report<br />

prescribes reinvention.<br />

38 40 42<br />

Buildings for better spaces<br />

ABB recently launched its new<br />

building portal featuring its full range<br />

of innovative building technologies<br />

that offer customers sustainable<br />

solutions and modern design.<br />

The future of multi-room audio room<br />

Multi-room audio has become a ‘must<br />

have’ – rather than a ‘would like’ –<br />

feature for many clients. Gary Lewis,<br />

CEDIA member company, Cornflake,<br />

looks at challenges and opportunities.<br />

Savant and Voltimum take center<br />

stage at Smart Building 2016<br />

The UK’s only dedicated event to<br />

integrated building technology, Smart<br />

Buildings is back and is set to be more<br />

electrifying than ever.


SuStAiNaBlE EnErGy<br />

aNd tHe lAtEsT StAtE Of tHe tEcHnOlOgIeS<br />

‘Green’ technologies and sustainable homes are crucial elements in the fight to<br />

reduce CO2 emissions to atmosphere and save <strong>energy</strong>. Such technologies can<br />

also save money – lots of it – and provide real business opportunities for electrical<br />

contractors and installers.<br />

One definition of sustainability is ‘a sustainable<br />

future in which a healthy environment, economic<br />

prosperity and social justice are pursued<br />

simultaneously to ensure the wellbeing and<br />

quality of life of present and future generations.<br />

Education is crucial to attaining that future’.<br />

In practical terms, sustainability technology<br />

means sustainable equipment and products that<br />

can be fitted and commissioned by electrical<br />

contractors and installers into existing buildings<br />

or into modern sustainable buildings and<br />

related environs. So, in terms of true sustainable<br />

technologies, we mean solar PV, solar thermal,<br />

heat pumps, microCHP, wind turbines and fuel<br />

cell systems.<br />

In this article, therefore, we don’t include in any<br />

detail, technologies that are not ‘sustainable’<br />

in the true sense of the definitions, but which<br />

can be used to save large amounts of <strong>energy</strong><br />

and reduce CO2 emission. Such very important<br />

‘low carbon’ technologies include whole house<br />

ventilation systems, fans having advanced<br />

<strong>energy</strong> saving motors, low <strong>energy</strong> lighting (e.g.<br />

LEDs, CFLs and others with modern controlgear<br />

and presence detection) and advanced electric<br />

heating systems that provide heat efficiently ►<br />

7 Smart Electrician ISSUE 02 | 2016<br />

2016 | ISSUE 03 Smart Electrician 7


Solar PV systems range<br />

from small, rooftopmounted<br />

or buildingintegrated<br />

types with<br />

capacities from a few<br />

kW to several tens of<br />

kilowatts, to large utilityscale<br />

power stations of<br />

hundreds of megawatts.<br />

only when and where it is needed.<br />

Smart home technologies are also<br />

becoming increasingly important. Aside<br />

from providing added comfort and<br />

convenience, smart home systems can<br />

also provide highly significant <strong>energy</strong><br />

savings. Finally, the crucial importance<br />

of excellent thermal insulation should not<br />

be forgotten.<br />

There’s a message to get across…<br />

Such technologies can provide large<br />

costs savings to home and building<br />

owners, as well as helping to reduce<br />

those all-important carbon emissions<br />

into the atmosphere, and it is here that<br />

electrical contractors and installers<br />

can benefit. Looking at the crucial<br />

issue of man-made climate change,<br />

it has become clear that the best way<br />

to get the message across to many<br />

people is not to bang on about how<br />

they are contributing to global warming,<br />

rather, how they can save money by<br />

reducing their <strong>energy</strong> consumption. This<br />

approach is now starting to work and<br />

ever more savvy electrical contractors<br />

and installers can see that they need<br />

to get the message across, often<br />

finding new business opportunities in the<br />

process. For example, they can advise<br />

their customers on how to reduce their<br />

<strong>energy</strong> consumption, which can add<br />

value to a contract.<br />

Looking at non-residential buildings,<br />

the <strong>energy</strong> consumed for heating<br />

and cooling is typically more than half<br />

the total <strong>energy</strong> consumption of the<br />

building. The introduction of simple<br />

design concepts and currently available<br />

technologies, can lead to significant<br />

reductions in the <strong>energy</strong> consumption,<br />

operating costs, and carbon emissions<br />

of both new and existing buildings.<br />

The UK Government still has big binding<br />

carbon reduction commitments it must<br />

meet, so there are also regulatory<br />

drivers for sustainable technology<br />

developments and take-up. These<br />

include the Code for Sustainable Homes,<br />

similar for non-domestic buildings, and<br />

Part L of the Building Regulations. Others<br />

include Building Regulations Part G -<br />

sanitary hot water and water heating<br />

guidance - Energy labeling for water<br />

heating, the ErP Directive’ (Energyrelated<br />

Products) regarding fans and<br />

heaters, and Standard Assessment<br />

Procedures (SAPs).<br />

Ignoring modern lighting, ventilation and<br />

smart home systems, which although<br />

adding greatly to <strong>energy</strong> saving, are not<br />

strictly ‘sustainable’, the technologies<br />

are as follows (in no particular order):<br />

Solar photovoltaic (solar PV)<br />

This highly successful technology<br />

comprises solar panels to absorb and<br />

convert sunlight into electricity, a solar<br />

inverter to change the electric current<br />

from DC to AC, as well as mounting,<br />

cabling, an integrated battery and<br />

other electrical accessories to set up a<br />

working system. It may also use a solar<br />

tracking system to improve the overall<br />

performance.<br />

Solar PV systems, for which prices<br />

have declined rapidly, range from<br />

small, rooftop-mounted or buildingintegrated<br />

types with capacities from<br />

a few kW to several tens of kilowatts,<br />

to large utility-scale power stations of<br />

hundreds of megawatts. Today, most<br />

solar PV systems are grid-connected,<br />

while off-grid or stand-alone systems<br />

only account for a small portion of<br />

the market. A rooftop system typically<br />

recoups the invested <strong>energy</strong> for its<br />

manufacturing and installation within a<br />

few years and produces about 95% net<br />

clean renewable <strong>energy</strong> over a 25 - 30-<br />

year service lifetime.<br />

Solar thermal<br />

Leaving aside massive and highly<br />

efficient utility-sized molten-salt solar<br />

thermal plant, what we refer to here is<br />

the use of the sun’s rays for hot water<br />

heating. Sometimes known as solar<br />

water heating (SWH), this sustainable<br />

technology involves the conversion of<br />

sunlight into renewable <strong>energy</strong> for water<br />

heating using a solar thermal collector.<br />

In a close-coupled SWH system, the<br />

storage tank is horizontally mounted<br />

immediately above the solar collectors<br />

on the roof. No pumping is required as<br />

8 Smart Electrician ISSUE 03 | 2016


the hot water naturally rises into the tank<br />

by thermo-siphon flow.<br />

In a pump-circulated system, the<br />

storage tank is ground- or floor-mounted<br />

and is below the level of the collectors,<br />

so a circulating pump is used to move<br />

water or heat transfer fluid between the<br />

tank and the collectors.<br />

SWH systems will provide warm or hot<br />

water for most of the year, but in winter<br />

there may not always be enough solar<br />

heat gain to deliver sufficient hot water.<br />

At such times, a gas or electric booster is<br />

used to heat the water.<br />

Heat pump<br />

This uses an electric motor to drive a<br />

refrigeration cycle, drawing <strong>energy</strong><br />

from a source (usually the ground or<br />

external ambient air), and pumps it into<br />

the space to be heated. Note that this<br />

is an essentially reversible process, so<br />

heat pumps can also be used to cool<br />

spaces. Although heat pumps will not<br />

be suitable for every application, they<br />

are very <strong>energy</strong> efficient and are often<br />

labeled ‘sustainable’, though some<br />

say that this technology is strictly ‘low<br />

carbon’ – it depends on the coefficient<br />

of performance (COP). The higher the<br />

COP, the more ‘sustainable’ the heat<br />

pump is.<br />

MicroCHP<br />

This is a small (roughly domestic boiler<br />

sized) combined heat and power unit<br />

that generates both heat and electricity<br />

from the same <strong>energy</strong> source. The main<br />

output of a microCHP system is heat, with<br />

some electricity generation, typically<br />

at a ratio of about 6:1 for domestic<br />

appliances.<br />

A typical domestic system will generate<br />

up to 1kW of electricity (or slightly more),<br />

but the amount of electricity generated<br />

over a year depends on how long the<br />

system is able to run. Normally mains gas<br />

(or LPG) is burned to power a small and<br />

very quiet Stirling (hot air) engine that<br />

drives a small AC generator to provide<br />

the electrical power. The waste heat is<br />

fed back into the gas boiler. This makes<br />

for a highly fuel-efficient system that<br />

can be wall-hung or floor standing. Both<br />

small internal combustion engines and<br />

fuel cells can also be used to generate<br />

the electricity. Installation is simple and<br />

the Feed-in-Tariff (FIT) applies, as it does<br />

to solar PV.<br />

There has been much excitement<br />

about microCHP, but development is<br />

still needed and costs are relatively high<br />

– and as modern conventional boilers<br />

are now so efficient, this technology<br />

has been relatively little used so far. The<br />

larger miniCHP systems, however, have<br />

been much more widely used in blocks<br />

of flats, and as part of district heating<br />

schemes - especially in mainland Europe.<br />

Wind turbines<br />

This technology comprises a tower, with<br />

a two- or three-bladed turbine at the<br />

top driving a generator through upspeed<br />

gearing. A transformer converts<br />

the generated electricity into a form<br />

that can be used. The turbine blades<br />

turn to face the wind automatically.<br />

Very large wind turbines are a proven<br />

technology increasingly used worldwide<br />

to provide ever-larger proportions of<br />

sustainable electrical power to grids,<br />

but smaller turbines – especially those<br />

intended for domestic homes – are more<br />

problematic. The airflow to such turbines<br />

absolutely must not be interfered with<br />

by nearby buildings, other structures<br />

or trees. Furthermore, if roof-mounted,<br />

damage to roofs can occur in storms<br />

etc.<br />

Any excess electrical <strong>energy</strong> generated<br />

can be sold to the grid, but a problem<br />

with both wind turbines and solar PV is<br />

that they only generate optimally (or at<br />

all) when the conditions are right (lots of<br />

wind and sun). However, suitable <strong>energy</strong><br />

storage units - such as special batteries<br />

and other technologies - are being<br />

developed to overcome this difficultly.<br />

Fuel cell<br />

This converts a fuel’s chemical <strong>energy</strong><br />

into electricity through a chemical<br />

reaction of positively charged hydrogen<br />

ions with oxygen or another oxidising<br />

agent. Fuel cells are often likened to ►<br />

The main output of a<br />

microCHP system is heat,<br />

with some electricity<br />

generation, typically at<br />

a ratio of about 6:1 for<br />

domestic appliances.<br />

2016 | ISSUE 03 Smart Electrician 9


atteries but are different in that they require<br />

a continuous source of fuel and oxygen<br />

or air to sustain the chemical reaction,<br />

whereas in a battery, the chemicals<br />

present react with each other to generate<br />

electricity. Fuel cells can produce electricity<br />

continuously for as long as these inputs<br />

are supplied. There are many types, but all<br />

comprise anode, cathode, and electrolyte<br />

that allow positively charged hydrogen ions<br />

(or protons) to move between the two sides<br />

of the fuel cell.<br />

As by-products, fuel cells produce water,<br />

heat and only very small amounts of<br />

nitrogen oxides and other emissions. So they<br />

are very clean, and the efficiency is also<br />

high, at around 40 – 60% (up to 85% efficient<br />

if waste heat is captured for use).<br />

The fuel cell market is growing, and Pike<br />

Research (via Wikipedia) has estimated<br />

that the stationary fuel cell market will<br />

reach 50GW by 2020. A big advantage is<br />

the technology’s use of hydrogen, which<br />

will never run out, but other advantages<br />

include cleanliness, high power output and<br />

they need little maintenance. However,<br />

the disadvantages are that to separate<br />

the atoms of the hydrogen and oxygen<br />

and generate hydrogen fuel, fossil fuels<br />

are needed. This defeats the purpose of an<br />

alternative <strong>energy</strong> source at least partially.<br />

Also, while fuel cells are non-toxic, there is a<br />

flammability (and even explosion) risk, and<br />

they are also expensive to make.<br />

The effect of the ‘Internet of Things’<br />

There is one technology, which while again<br />

is not sustainable in itself, is becoming so<br />

fast growing and important that it must<br />

be mentioned here. That is the Internet of<br />

Things (IoT).<br />

The IoT is the network of physical objects<br />

or ‘things’ embedded with electronics,<br />

software, sensors and connectivity to enable<br />

it to achieve greater value and service by<br />

exchanging data with the manufacturer,<br />

operator and/or other connected devices.<br />

The IoT will lead to automation in nearly<br />

all fields, including of course, heating,<br />

ventilation, smart meters - and all things<br />

sustainable as well. ■<br />

Fuel cells are very<br />

clean, and the<br />

efficiency is also high,<br />

at around 40 – 60% (up<br />

to 85% efficient if waste<br />

heat is captured<br />

for use).<br />

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10 NEW TRENDS<br />

THAT WILL AFFECT GREEN BUILDING<br />

Most environmental resources do not, formally, have a recognised market price, however it is generally recognised that<br />

nature provides free goods and services that are important to our society, many of which are essential for our survival. This<br />

is the basis of so-called ‘green economy’. Going green has become very attractive as a business strategy, with the birth<br />

of many new terms such as green politics, sustainability, renewables, ecological footprints and many others, including the<br />

phrase, well known in our industry, of ‘green building’.<br />

The term ‘green building’ was first coined in the 1970s<br />

by architects and environmentalists. It can also be<br />

known as ‘green construction’ or ‘sustainable building’.<br />

In an environmental context, being green means being<br />

at peace with nature, not attacking her. Applied to<br />

architecture, a green building, then, is that designed, built<br />

and maintained with minimum consumption of water and<br />

<strong>energy</strong>, giving priority to materials that do not pollute the<br />

environment during their production and do not harm the<br />

health of users.<br />

Exponential growth of the green commercial real<br />

estate market: this will be seen in both the commercial<br />

and corporate sectors and will be increasingly<br />

replicated with government buildings, universities, nonprofit<br />

offices and schools under construction. Some of<br />

the reasons for this range from increasing numbers of<br />

institutional investors, changes in state and municipal<br />

laws, commercial tenants’ demands, tax credits and<br />

incentives, total operating costs and green building<br />

studies.<br />

With the growth of the environmental movement, strict<br />

environmental legislation and foreign investors keen to<br />

invest in high quality sustainable projects, environmental<br />

management has become more important than ever.<br />

There are two reasons why green building is becoming<br />

increasingly important for the industry: 1) green building<br />

technologies and resources are getting cheaper, thanks<br />

to technological advances, mass production and market<br />

competition; and 2) whether fuelled by the green trend<br />

or by a real need to reduce their footprint, people want<br />

to be more green. This is important because, as a recent<br />

UK Government document states, ’projects are generally<br />

more likely to succeed if they have broad public support<br />

and the consent of local communities.’<br />

The following list of ten trends distils Smart Electrician’s<br />

thinking about green building and many similar issues<br />

over the past year and forecasts what will shape the<br />

sustainable development agenda in the next year:<br />

Public and commercial buildings are responsible for<br />

40% of global <strong>energy</strong> use, mainly driven by heating,<br />

cooling and lighting. Products from companies such<br />

as Philips, including <strong>energy</strong> efficient LED lighting<br />

combined with smart controls, can save up to 70% in<br />

lighting <strong>energy</strong> costs each year.<br />

Convergence between Business Management<br />

Systems and IT: <strong>energy</strong> efficiency measures in buildings<br />

are being more widely adopted. This will continue on a<br />

larger scale in corporate and commercial real estate,<br />

but this year the trend will incorporate government<br />

buildings, education and housing. The role of<br />

automation will be the cornerstone of these strategies,<br />

which aim to maximise the <strong>energy</strong> efficiency, safety,<br />

and comfort of buildings, all using cloud-based<br />

services.<br />

Operational transparency: the public availability<br />

of all information concerning the performance of<br />

12 Smart Electrician ISSUE 03 | 2016


green buildings will be a trend driven by government<br />

programmes worldwide.<br />

climate change continues to affect precipitation<br />

systems and water supply worldwide.<br />

Design and operation of Zero Emissions (Net-Zero)<br />

buildings: it is a fact that green buildings are the<br />

foundation of the modern construction and lighting<br />

industry. But in order to distinguish between projects,<br />

many owners and developers of buildings have now<br />

taken the next step: having buildings be completely<br />

self-sustainable by producing the <strong>energy</strong> they need<br />

for their operation from renewable sources rather than<br />

relying on fossil fuel.<br />

Photovoltaic systems: the use of solar <strong>energy</strong><br />

in commercial applications continues to grow.<br />

Considered a viable and cost-competitive <strong>energy</strong><br />

alternative to traditional fossil fuel <strong>energy</strong> sources, solar<br />

will continue growing - providing capital for rooftop<br />

solar systems in low-rise commercial buildings, parking<br />

lots, warehouses and retail stores as well as in homes.<br />

Integration of Smart Cities: more and more buildings<br />

will be connected to electricity grids bidirectionally,<br />

creating an intelligent or ‘smart’ grid network. Both<br />

buildings and utilities can optimise their power<br />

management capabilities.<br />

Retrofit in existing buildings: the focus of the green<br />

building industry will no longer only be new buildings<br />

and instead retrofitting, or technical renovation, will<br />

be used more in existing buildings. This is expected to<br />

mark the beginning of a new era with lighting products<br />

taking the main stage.<br />

Blue is the new green: better use of water, inspired by<br />

the increasing awareness of the global crisis in fresh<br />

water supply, which is expected to increase as global<br />

Administration in the cloud: green buildings will be<br />

designed and managed by increasingly innovative<br />

information technology platforms based in the cloud.<br />

Collecting the required materials to build a green<br />

project can be a challenge when availability in the<br />

market is quite scarce, Cloud-based platforms will<br />

help everyone to manage and archive materials.<br />

Many construction projects are being undertaken on<br />

a daily basis globally, and managing these can be<br />

an arduous task for those who are working in a crosscountry<br />

team. This is where cloud computing can<br />

help - connecting distant individuals, enabling a more<br />

synchronised cooperation.<br />

Electric vehicles: as of September 2015, there are over<br />

30 models of highway legal all-electric passenger cars<br />

and utility vans available for retail sales, mainly in the<br />

United States, China, Japan, and Western European<br />

countries. In the UK alone, plug-in cars increased from<br />

3,500 in 2013 to more than 63,000 at the beginning of<br />

June 2016. The automotive industry has made it clear<br />

that electric vehicles are a reality, but there is no<br />

optimal infrastructure for them yet. Worldwide, more<br />

and more companies, governments and regulators<br />

work on comprehensive programmes to promote<br />

sustainable mobility, such as charging stations.<br />

When it comes to sustainability and green building,<br />

we’ve made important progress as an industry over<br />

the last decade, but even more important is the work<br />

that lies ahead. Across the lighting and construction<br />

sectors, we need to recognise the importance of<br />

each trend and how to future proof to incorporate<br />

these new trends as necessary. ■<br />

2016 | ISSUE 03 Smart Electrician 13


Future ambitions,<br />

future markets<br />

The renewable <strong>energy</strong> industry has had a turbulent 12<br />

months. Too many initiatives have either been cancelled<br />

or simply not made, financial incentives have collapsed,<br />

and the demand from domestic clients for renewable<br />

technology has fallen. One ray of sunshine is the<br />

realisation in the commercial sector that solar PV can still<br />

reduce electricity bills, particularly where there is high<br />

daytime <strong>energy</strong> use.<br />

Yet, as the UK’s <strong>energy</strong> infrastructure continues to struggle<br />

under increasing demand for more electricity, the rise<br />

of <strong>energy</strong> storage might be a way of providing useful<br />

<strong>energy</strong> to supplement new power stations or refurbishing<br />

existing ones, and giving a much needed ‘second boost’<br />

to renewable electricity.<br />

The clear benefit of <strong>energy</strong> storage is that it can make<br />

the most of the productivity peaks associated with<br />

renewable technology to generate and store <strong>energy</strong><br />

for use at a time of high demand. This effectively means<br />

that sunny and windy days become times to harness and<br />

store the <strong>energy</strong> generated by PV and wind turbines,<br />

which could then be used at times of peak demand.<br />

Of course, take-up of these systems would be boosted<br />

further if the government could incentivise the use of<br />

electrical <strong>energy</strong> storage, and if an R&D push results in<br />

big increases in battery performance. Storage is already<br />

carried out on a large scale where large electricity<br />

consumers have applied via an auction process to install<br />

<strong>energy</strong> saving measures that reduce power demand at<br />

peak periods. Storage systems can achieve the same<br />

thing by time-shifting <strong>energy</strong> requirements and could<br />

make a major contribution to smoothing out <strong>energy</strong><br />

demand. The question is whether government has the<br />

funds to provide incentives for R&D and storage roll-out<br />

– or the willingness to deploy it.<br />

Funding aside, if the <strong>energy</strong> storage revolution is to<br />

succeed, the right guidance needs to be available for<br />

installations – and at present, there are few standards<br />

available. One, IEC 60364 -8-2, is being worked on at<br />

present, but is unlikely to appear in the first edition of<br />

the 18th Edition of BS7671 (the IET Wiring Regulations). In<br />

the short term, a Code of Practice on the Installation of<br />

Storage systems is being developed and it is hoped that<br />

this will be available by the end of this year.<br />

This approach could give a much-needed lease of life<br />

to small scale domestic PV systems and their commercial<br />

counterparts. It may lead to existing users wishing to<br />

extend their renewables capacity, and to more domestic<br />

and commercial customers benefitting from renewable<br />

technology – particularly if they realise the potential for a<br />

significant return on investment.<br />

Clearly, the potential is there for <strong>energy</strong> storage to deliver<br />

real benefits to end users, the renewable <strong>energy</strong> industry,<br />

the UK’s <strong>energy</strong> infrastructure and the UK’s carbon<br />

footprint. What it needs now is the government’s backing<br />

- and its willingness to work with industry to turn massive<br />

potential into speedy reality. ■<br />

by Bill Wright<br />

Head of Energy Solutions<br />

at the Electrical Contractors' Association (ECA)<br />

14 Smart Electrician ISSUE 03 | 2016


Kevin Snowdon, Managing Director, NES Electrical<br />

The ECA is more than a badge: it’s a valuable<br />

business benefit. ECA members can get free<br />

specialist technical advice on design, installation,<br />

inspection and maintenance as well as being<br />

kept up-to-date on the latest regulations.<br />

ECA Membership includes, but is not limited to:<br />

• The ECA Guarantee of Work to give your<br />

customers peace of mind<br />

• Discounted training courses<br />

• Commercial contracts and legal advice on a<br />

range of issues affecting your business<br />

• Credit rating and debt recovery services<br />

• Advice on employee relations, recruitment,<br />

disciplinary matters, employment law and<br />

industrial relations<br />

• Reduced rates for BUPA cover, life insurance<br />

and pension scheme<br />

• Health and Safety advice on how to reduce<br />

risks and comply with legislation<br />

Here to help your business.<br />

www.eca.co.uk<br />

Connect with us | ECAlive<br />

The ECA operates within England, Wales and N. Ireland.<br />

Those businesses located in Scotland wishing to consider trade association<br />

membership should contact SELECT (www.select.org.uk).


HELPING<br />

ELECTRICAL<br />

CONTRACTORS<br />

TO BENEFIT FROM THE<br />

ENERGY<br />

EFFICIENCY<br />

ISSUE<br />

16 Smart Electrician ISSUE 03 | 2016


As more organisations switch onto the benefits of <strong>energy</strong> saving and face the pressure<br />

to comply with mounting legislation, increased emphasis is being placed on <strong>energy</strong><br />

efficient products and solutions. Schneider Electric discusses the options available and<br />

how contractors can play a helping hand:<br />

In today’s society, commercial organisations cannot<br />

escape the fact that saving <strong>energy</strong> has to be a<br />

priority. Not only does this align with the Government’s<br />

drive towards lower carbon emissions, but companies<br />

are understandably looking for ways to save money<br />

and reducing <strong>energy</strong> usage can achieve this.<br />

Electrical contractors have a role to play, not just in<br />

the installation of technologies, but by understanding<br />

legislation that affects their customers, they can also<br />

add value in the specification process.<br />

Some of the monitoring technologies are now<br />

recognised by the Government led Enhanced Capital<br />

Allowance Scheme. For example, Schneider Electric’s<br />

PowerView software can read up to a considerable<br />

distance and allows data to be read on the user’s<br />

computer. This enables businesses to offset the cost of<br />

<strong>energy</strong> efficient products and technologies against<br />

their tax bill, provided they use right equipment.<br />

Energy management and automation<br />

When it comes to achieving greater <strong>energy</strong> efficiency<br />

within an organisation, the way to manage and<br />

improve <strong>energy</strong> usage can be broken into four simple<br />

steps; measure, fix the basics, automate, and monitor<br />

and improve.<br />

Energy audits and metering essential<br />

Before reducing costs, a business needs to know<br />

what it spends. By measuring <strong>energy</strong> usage through<br />

metering, <strong>energy</strong> audits and simple bill analysis, it is<br />

possible to monitor the consumption of installations,<br />

areas and different systems, such as heating and<br />

lighting, to identify where savings can be made.<br />

In a bid to reduce the UK’s carbon emissions, Part<br />

L2 of the Building Regulations demands new builds,<br />

major refurbishments and any other commercial<br />

premises to account for the usage of 90% of each fuel<br />

type, meaning that metering should be fitted. Today<br />

there is an array of measuring technologies available<br />

to help organisations keep track of their <strong>energy</strong><br />

consumptions. These range from individual metering<br />

and monitoring devices, to products where metering<br />

is integrated into another technology commonly<br />

found in an electrical circuit, such as a distribution<br />

board or circuit breaker.<br />

The second step in an <strong>energy</strong> management strategy<br />

is to fix the basics. This begins with organisations<br />

encouraging simple behavioural changes within<br />

the business, like switching off lights or IT equipment<br />

when not required, which will make significant<br />

savings. In addition, contractors should highlight the<br />

importance of considering the power consumption of<br />

different technologies and installations such as circuit<br />

breakers, contactors and low loss transformers, which<br />

work efficiently and will help reduce <strong>energy</strong> costs.<br />

The third step, automation, avoids the business of<br />

having to rely on uncertain human actions and<br />

ensures <strong>energy</strong> savings while providing increased<br />

comfort and safety. Today’s automated solutions<br />

include ranges such as Schneider Electric’s Control<br />

and Command.<br />

Energy efficiency gains based on lighting can<br />

tangibly be achieved even before entering the<br />

building itself. By integrating a voltage regulation<br />

system to operate external parking areas for office<br />

blocks or loading bays in industrial premises, a 20 to<br />

30% <strong>energy</strong> reduction can be achieved. Systems<br />

such as Schneider Electric’s Lubio work by reducing<br />

the operating voltage to the light fitting. The system<br />

allows the operating voltage of the lighting to be ►<br />

2016 | ISSUE 03 Smart Electrician 17


adjusted so that the optimum light level is provided<br />

at the same time as achieving maximum <strong>energy</strong><br />

efficiency.<br />

Reducing the levels of electricity also results in the<br />

longer life of consumables, such as lamps, and<br />

this can save significant amounts of money on the<br />

maintenance of commercial properties.<br />

and therefore money. It is important to recognise<br />

the benefits of command control components in<br />

other areas as well as lighting. These controls can<br />

also be used to manage heating, ventilation and<br />

air conditioning, leading to a complete building<br />

management programme.<br />

Power factor correction<br />

For commercial buildings with standard working<br />

hours, it would be worth using pre-set timing for<br />

switching lights on and off. Time delay switches<br />

have been in operation for many years, used in<br />

less frequented areas or those where entry and<br />

egress is at different points. However, they have<br />

been revamped for today’s needs. Gone are the<br />

pneumatic timers which slowly released before<br />

cutting the power to the light, now they are<br />

electronic and fully programmable to whatever<br />

time setting is required, for as little as two minutes or<br />

as much as two hours.<br />

Occupancy sensing<br />

Occupancy sensing will detect the presence or<br />

absence of people within the parameters of the<br />

sensor and will turn lights on and off accordingly.<br />

This solution is most suited to areas of a building<br />

where occupancy is unpredictable, such as<br />

meeting rooms and private offices. The use of these<br />

sensors, commonly known as presence detectors<br />

or PIRs, in a private office, could save around 45%<br />

of its yearly <strong>energy</strong> usage. For spaces where use is<br />

much more regulated and predictable, scheduled<br />

lighting controls can be used to turn lights on and<br />

off at set times.<br />

Going beyond just switching lights on and off, a<br />

daylight harvesting control reduces power to the<br />

lights or turns them off completely, depending on the<br />

level of natural light. Photosensors linked to dimmer<br />

devices will vary the lighting output and provide<br />

an ideal solution for premises that have numerous<br />

offices and meeting rooms with many windows, or<br />

even a modern, glass fronted building where the<br />

space isn’t always being used and the quality of<br />

natural light varies. This ensures that lighting is not<br />

used unnecessarily, consequently saving <strong>energy</strong><br />

Other changes that can be made include<br />

improving the power quality through solutions<br />

such as power factor correction (PFC), which gives<br />

significant cost savings with an excellent return on<br />

investment. Power quality issues can seriously affect<br />

a site’s power factor and its efficiency. Active<br />

Harmonic Filters (AHF) provide the simplest and most<br />

effective means to mitigate harmonics, reduce<br />

process-related voltage fluctuations and improve<br />

equipment operating life and system capacity.<br />

PFC also delivers substantial savings. The quantity of<br />

electric motors, induction heaters and fluorescent<br />

lighting installed in buildings has increased,<br />

reducing the power factor and the efficiency of the<br />

power supply. Using PFC lowers the current drawn<br />

from the electricity supply, decreasing reactive<br />

power charging, consumption and CO2 emissions,<br />

and therefore creates a greater supply capacity<br />

through more efficient <strong>energy</strong> use.<br />

The final step in the cycle is to monitor and improve.<br />

By continuously analysing usage, businesses can<br />

achieve cost savings through maintenance,<br />

supervision and monitoring, to help make further<br />

improvements. Software solutions, such as a<br />

comprehensive building management system,<br />

can monitor and analyse <strong>energy</strong> trends and<br />

consumption, which will help the company to<br />

strictly manage costs well into the future.<br />

There is an extensive range of solutions and<br />

services available to help contractors add value<br />

to the service they offer customers and spread<br />

the message about how easy <strong>energy</strong> efficiency<br />

can be. By implementing <strong>energy</strong> management<br />

solutions, contractors can help businesses to save<br />

money, lower their carbon footprint and meet<br />

legislative commitments. ■<br />

18 Smart Electrician ISSUE 03 | 2016


PIR controls in commercial lighting applications<br />

By Paul Bellamy, Director at Flex Connectors<br />

Anyone connected with the commercial lighting sector will be aware that the drive for increased <strong>energy</strong><br />

efficiency has resulted in passive infra-red (PIR) controls becoming the norm. Whatever the type of installation,<br />

be it a school, hospital, office or retail outlet, areas where luminaires are controlled by a simple switch on the<br />

wall are greatly outnumbered by those incorporating something a bit more.. involved.<br />

The absolute basics<br />

Occupancy control, where lights turn on automatically<br />

as someone enters a space and off after it’s vacated, is<br />

the basic control premise and virtually everything else is a<br />

variation or add-on of this simple principle. Absence control<br />

differs slightly in that it requires the pulse of a momentary<br />

switch to turn lights on, but they’ll turn off automatically<br />

after the area’s vacated.<br />

Absence will yield greater savings than basic occupancy<br />

because the user of the space can decide whether to<br />

initiate the lights on; no pulse of the switch, no lights. Further<br />

efficiencies can be squeezed out of both occupancy and<br />

absence methods with the addition of light level sensing.<br />

This comes in two flavours, daylight dependency and<br />

daylight linking, and is employed in spaces with good levels<br />

of natural daylight. Daylight dependency simply switches<br />

the lights off once a target light level is surpassed, whereas<br />

daylight linking gradually lowers/raises the output of a<br />

luminaire to maintain a constant light level.<br />

Some things to consider<br />

The temptation to use as few sensor heads as possible in<br />

a space is common, but the further away from the head,<br />

the greater the movement required to trigger it. A common<br />

solution is to increase the timeout to maximum because<br />

‘Someone’s bound to make a big enough movement in 40<br />

minutes, aren’t they?’ Granted, it’s a solution, but the wrong<br />

one. Imagine somebody walks into a room, automatically<br />

turning on the lights as they do so, picks something up then<br />

leaves; all the lights are on for the next 39½ minutes. Isn’t this<br />

completely at odds with the reason for installing the controls<br />

in the first place? A better solution would be to install enough<br />

heads to ensure finer movements are picked up anywhere<br />

in the space. This allows the timeout to be set appropriately,<br />

resulting in greater efficiency and a swifter ROI as a result.<br />

Choosing a product that will allow extra sensor heads to be<br />

easily added will increase the installer’s efficiency too.<br />

The growth rate of lighting controls could be considered<br />

snail paced when compared to that of LED during the last<br />

couple of years. However, one aspect of LED lighting that<br />

should be given serious consideration is the in-rush current,<br />

which is generally significantly higher than that associated<br />

with its fluorescent cousins. It’s sensible therefore to use<br />

control devices with relays capable of handling this current.<br />

Unlike the previous point, insisting the control device<br />

incorporates a high in-rush relay may not increase an LED’s<br />

efficiency per se, but it will probably extend the life of the<br />

control device. Efficiency comes in various guises.<br />

Not all DALI/DSI specific controls incorporate a relay, as<br />

the connected luminaires can be switched on/off and<br />

regulated up/down via the sensor’s digital output. This<br />

requires that the luminaire be permanently live and results in<br />

a small amount of current, commonly referred to as parasitic<br />

load, being drawn 24/7; imagine a TV left on standby.<br />

Selecting a DALI or DSI control device that incorporates<br />

a relay can allow a luminaire’s parasitic load, which<br />

could accumulate to relatively significant levels in large<br />

installations, to be negated. Additionally, such a device is<br />

capable of controlling regulating and non-regulating loads<br />

simultaneously.<br />

The best way to achieve maximum efficiencies out of any<br />

electrical product, not just a luminaire, is to ensure it’s on only<br />

when required. As specifiers, installers and manufacturers,<br />

we’re responsible for ensuring that the electricity bill payer<br />

is given a system that does just that. Applying a few simple<br />

thought processes at design and installation can result in<br />

our client getting a return on their investment sooner rather<br />

than later. ■<br />

20 Smart Electrician ISSUE 03 | 2016


flex<br />

connectors<br />

Leaders in lighting<br />

connection & control<br />

Tracking = 277<br />

flex7 modular lighting control<br />

system was designed with the<br />

installer and end user firmly in<br />

mind. Quick to install, easy to<br />

reconfigure, with no need for<br />

commissioning.<br />

• Simple plug-in connection.<br />

• No commissioning.<br />

• Save up to 70% on your building’s<br />

lighting bill.<br />

• Smallest sensor head of its type.<br />

• Protected extra low voltage.<br />

• Occupancy, absence, daylight<br />

linking/dimming.<br />

• High inrush relay.<br />

• Up to 6 heads per controller.<br />

• Integrated emergency test option.<br />

• Adjustable timeout period.<br />

• Eligible for Government ECA Scheme.<br />

• BIM Ready.<br />

Save Time, Save Energy, Save Money<br />

www.flexconnectors.co.uk Tel: 020 8580 1066 info@flexconnectors.co.uk<br />

2016 | ISSUE 02 Smart Electrician 21


Many companies in the electrical industry are participating in the government’s £9.5m initiative to<br />

modernise the UK’s <strong>energy</strong> infrastructure so that it will be able to accommodate millions of homes fitted<br />

with solar photovoltaic (solar PV) panels and electric vehicle (EV) charging facilities. A new Government<br />

project is now underway with the aim of getting the UK’s electricity grid ready to efficiently accept the<br />

10 million homes that are expected to have solar PV by 2020. This project, which is being funded by<br />

Innovate UK, will find new ways in which <strong>energy</strong> can be supplied and used to address the increasingly<br />

important issues of sustainability. In addition, it must supply security with affordability.<br />

PEC boosted grid must cope<br />

10 MILLION SOLAR HO<br />

22 Smart Electrician ISSUE 03 | 2016


with<br />

MES<br />

This new programme - which is part of<br />

a major government push to help the<br />

grid cope with two-way generation<br />

and involves several companies, such<br />

as Schneider Electric, Western Power<br />

Distribution, Anvil Semiconductors, Turbo<br />

Power Systems, Aston University and<br />

Exception EMS - will improve the grid<br />

<strong>energy</strong> infrastructure and is also expected<br />

to increase the use of EVs to over<br />

six million by 2023.<br />

The numbers<br />

Estimates vary significantly, but there may<br />

be as many as 1.2 million EVs on the road,<br />

plus 350,000 Plug-in Hybrid Electric Vehicles<br />

(PHEVs) on UK roads by 2020 – as long as<br />

the all-important charging infrastructure (or<br />

a large part of it) is in place by then. Other<br />

estimates are significantly lower, but it is<br />

clear that there will be far more EVs on the<br />

UK’s roads than now for carmakers to meet<br />

their increasingly onerous CO2<br />

emissions targets.<br />

Looking at domestic solar PV installations,<br />

from almost zero, this technology has now<br />

been deployed on well over half a million<br />

buildings, with total installed capacity in<br />

2014 exceeding 4 GWp.<br />

While the UK already has a legally binding<br />

EU obligation for 15% of its <strong>energy</strong> to come<br />

from renewables by 2020, as the sector<br />

drives the cost of solar PV down towards<br />

grid parity, there is the potential to install up<br />

to 20 GWp of solar PV early<br />

in the next decade.<br />

Indeed, the Solar Trades Association<br />

said as much new capacity was<br />

installed in the first three months<br />

of 2015 as in the whole of 2014 –<br />

though this included large-scale<br />

solar PV as well as domestic<br />

and business. The government<br />

has said that there are now<br />

650,000 solar installations in<br />

the UK, including 10 million<br />

panels on homes.<br />

But whatever the actual<br />

figures turn out to be<br />

by 2020, it is clear<br />

that the extra twoway<br />

demand for<br />

electricity on the UK grid means that it will<br />

have to become significantly ‘smarter’.<br />

Distribution network operators (DNOs) are<br />

facing significant challenges in modernising<br />

existing infrastructures, and investing in<br />

smart technologies, to cope with this<br />

transformation. This Government project is<br />

just one way of addressing the issues.<br />

Higher network voltage<br />

One way of improving the capacity<br />

of the UK’s existing residential <strong>energy</strong><br />

infrastructure is by increasing the local<br />

network voltage. This approach will allow<br />

the grid to deliver different voltages<br />

simultaneously for varying requirements.<br />

The project, trialed on Western Power<br />

Distribution’s residential network, aims to<br />

boost the capacity of an existing residential<br />

<strong>energy</strong> network, at low cost, by installing<br />

high-performance power electronic<br />

converters (PECs) into individual properties’<br />

meter-boxes, and there will also be a local<br />

sub-station converter for distributing at<br />

400V. To keep costs low, these PECs will<br />

make innovative use of silicon carbide<br />

(SiC) switching devices made utilising Anvil<br />

Semiconductor’s SiC-on silicon technology.<br />

SiC can sustain much higher voltages<br />

(almost 10 times) compared with silicon<br />

but, to date, silicon carbide switches<br />

have been prohibitively expensive to<br />

manufacture. This project should, if<br />

successful, obviate the problem.<br />

From generation to use, power and<br />

electronic semiconductor devices are<br />

employed in the control, conversion<br />

and switching of electric power. Their<br />

efficiency is key in reducing the power<br />

required by any system or product in a<br />

host of applications including consumer<br />

electronics, LEDs, EVs and trains, industrial<br />

motors, aircraft, ships, commercial premises<br />

and data centres.<br />

Other benefits include achieving efficient<br />

generation of power, particularly with<br />

the increase in renewables such as solar<br />

PV, wind and tidal - as well as delivering<br />

efficient distribution, control and conversion<br />

of power from many sources<br />

via the ‘smart grid’. ■<br />

2016 | ISSUE 03 Smart Electrician 23


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Find all the product data, brochures news and<br />

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The IoT revolution is changing the way you work, as an<br />

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as an electrical professional in the future. The IoT is officially<br />

one of Europe’s biggest ever IT projects. In order to roll out this<br />

project, the UK will need electrical engineers who understand<br />

IMAGE<br />

smart technology. Are you one of them?<br />

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within the non<br />

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Solar systems<br />

&<br />

how to install them<br />

Smart Electrician takes a look at<br />

installation equipment & techniques<br />

The greatly increased use solar photovoltaic (solar PV) panels has been a great success<br />

in the UK over recent years, and even though this is now threatened by the present<br />

Government’s big cut-backs, the technology still represents business opportunities for<br />

enterprising electrical installers.<br />

Solar PV panels can be ground-, roof-, or-mast<br />

mounted, but the angle, direction and being<br />

unobstructed are crucially important, as is the choice<br />

of associated installation equipment. This article looks<br />

at these issues and the equipment itself.<br />

Note, firstly, that solar PV and wind power can be<br />

combined to form a hybrid system, though installation<br />

will be a little more complex. Whichever type is<br />

selected, it has to be carefully fitted out with suitable<br />

electrical and other equipment to function optimally.<br />

What is required?<br />

cells adding up (and sometimes many panels too) the<br />

danger is there - so, a safety reminder: solar PV panels<br />

produce electricity all the time they are exposed to<br />

light, so working with them can be hazardous.<br />

Also, remember that solar PV modules are designed<br />

to have working lives of typically 25 to 30 years, so<br />

some components will have to work reliably outdoors<br />

for this period, unaffected by extremes of weather -<br />

and even attacks by rodents.<br />

What’s in a solar PV kit?<br />

Secondly, it might be thought that solar PV is safe,<br />

low-voltage equipment. However, with many solar<br />

Typically, a domestic solar PV kit for smaller homes<br />

includes 0.5 -1kW solar modules, suitable ►<br />

2016 | ISSUE 03 Smart Electrician 25


controlled<br />

tracking<br />

systems can<br />

provide up to<br />

40% more<br />

efficiency than<br />

fixed solar<br />

layouts.<br />

mounting frames for roof or ground, DC<br />

circuit breaker, a 45A solar regulator,<br />

pre-wired control cabinet with charge<br />

controller, a 1500W pure sine wave<br />

inverter, a 700Ah 12VDC battery bank,<br />

plus all cables, connectors and mast<br />

clips etc.<br />

The kits for larger homes and other<br />

buildings are broadly similar, but require<br />

larger powers. Other domestic solar PV<br />

equipment can include special cabinets<br />

for network feed-ins, and active switches<br />

for communication and monitoring.<br />

Mounting solar PV panels<br />

and they work, but how to handle the<br />

resulting power? A suitable inverter must<br />

be fitted. This converts the PV array’s DC<br />

output to AC, which is essential for ‘offgrid’<br />

applications with power supplied<br />

from charged-up batteries. If the system<br />

is ‘grid-tied’, it can export any excess<br />

electricity into the grid. At night, power is<br />

imported back.<br />

Anti-islanding safety circuits and<br />

interface protection integral with the<br />

latest solar PV inverters ensure that<br />

power is only produced when the unit<br />

is connected to the grid, which is active<br />

and operating within national standards.<br />

As stated, solar PV panels can be<br />

ground, roof- or mast-mounted, though<br />

for most homes, roof mounted systems<br />

are the commonest type. However,<br />

there are simplified types available that<br />

can be placed almost anywhere using<br />

fold out legs. In the UK, solar PV arrays<br />

should ideally be south facing, angled at<br />

30 degrees.<br />

In terms of the fittings, the solar PV<br />

modules have rigid shells that can be<br />

bolted or clamped to roofs using roof<br />

anchors. Roof mounting frames are<br />

provided by various – usually specialist<br />

- companies. However, to obtain<br />

optimum solar performance, the time<br />

solar arrays face the available sun must<br />

be maximised using solar trackers. This,<br />

of course, adds to cost and complexity,<br />

so calculations have to be made of<br />

performance improvement against<br />

extra cost to decide viability.<br />

Bear in mind that controlled tracking<br />

systems can provide up to 40% more<br />

efficiency than fixed solar layouts. A<br />

good modern solar tracker may typically<br />

use dual-axis active tracking systems for<br />

free-standing solar PV applications.<br />

Power conversion<br />

You have fitted the solar PV panels,<br />

Miniaturisation is important in homes, as<br />

the inverters are usually installed indoors.<br />

Mini string inverters for domestic use are<br />

available from various companies.<br />

Inverter-chargers combine inverter and<br />

battery charger in one unit, and can act<br />

as an uninterruptible power supply (UPS).<br />

Pulse width modulation (PWM) controllers<br />

in 12, 24 or 48V (to 4kW) ratings provide<br />

reliable solar battery charging and load<br />

control, or can divert excess power to a<br />

dump load.<br />

Connection and cabling<br />

Solar PV panels (modules) are usually<br />

supplied factory pre-wired for easy<br />

connection. Cables, for delivering<br />

electricity to consumer unit/meter, are<br />

sometimes supplied with reverse feed<br />

blocking diode, plus suitable connectors.<br />

They should be double insulated,<br />

weatherproof and rodent-proof.<br />

Cable types range from photovoltaic<br />

LV cables for linking PV panels to<br />

copper / aluminum cables carrying<br />

<strong>energy</strong> from array boxes to inverters, to<br />

special halogen-free cables for secure<br />

rooftop installations, silicone cables for<br />

cold environments, and earth cables<br />

to guard against short-circuits. Copper<br />

and fibre-optic cables can be provided<br />

26 Smart Electrician ISSUE 03 | 2016


for surveillance and control and include<br />

sensor and bus cables (for tracking<br />

systems).<br />

can also be used for protection.<br />

Batteries, charging and regulation<br />

When installing cable, it should be laid<br />

in parallel with looping avoided (except<br />

where entering a building), and should<br />

always follow the shortest possible route<br />

to array combiner boxes - various firms<br />

manufacture combiner boxes for solar<br />

power installations.<br />

For parallel connections, branch<br />

connectors will be required. All outdoor<br />

connectors should have a suitable IP<br />

rating for long-term exterior use. Always<br />

check for polarity, and that the sum of<br />

the open circuit voltages of all solar PV<br />

modules in the string equals the string’s<br />

open circuit voltage. All DC cable should<br />

be clearly identified. Important - don’t<br />

lay cables near lightning conductors.<br />

A waterproof junction box assembly<br />

will be required. The latest types may<br />

contain bypass diode connections, a<br />

moisture protection filter and PV cable<br />

terminals. In installation, junction boxes<br />

are designed to be simply placed on<br />

to the base already fitted to the PV<br />

module(s).<br />

Cabinets and protection<br />

PV array currents need to be isolated,<br />

protected and switched. Cabinets<br />

fitted with fuses and switches may be<br />

required. Larger cabinets located away<br />

from homes allow the utility concerned<br />

to isolate the network, either from a<br />

consumer or producer perspective.<br />

These cabinets form a major node<br />

between private and public networks<br />

and a security point for maintenance.<br />

In terms of circuit protection, various<br />

manufacturers and suppliers provide<br />

comprehensive ranges, including DC<br />

switch-disconnectors from 20 - 63A, while<br />

12 - 63A DC string circuit breakers protect<br />

PV modules from fault currents. Fuses<br />

Batteries are used to store the solar PV<br />

generated electricity until needed for<br />

use. Modern batteries provide long life for<br />

solar <strong>energy</strong> storage, and maintenancefree<br />

sealed lead acid batteries are<br />

probably best for the application. A<br />

good example is provided by carbonfibre<br />

gel solar batteries, some of which<br />

have a seven-year unconditional<br />

warranty.<br />

However, keep an eye open for the<br />

latest battery chemistries, as ever more<br />

efficient ones are being developed all<br />

the time. Battery monitors and isolators<br />

are a good idea.<br />

A voltage regulator/charge controller<br />

keeps batteries charged and avoids<br />

overcharging or deep discharge<br />

damage. Such controllers vary from<br />

simple types to sophisticated PWM<br />

versions. To choose a suitable one,<br />

use the familiar amps = watts X volts<br />

equation, so that - for example - an 80W<br />

solar PV array charging a 12V battery<br />

should be regulated using a 6.7A solar<br />

regulator (80W/12V = 6.7A).<br />

The FiT and smart meters<br />

For householders wishing to export excess<br />

electrical power back to the grid, the<br />

Feed-In Tariff (FiT) for micro-generation<br />

electricity that used to be paid was<br />

41.3p /kWh / unit exported (less for<br />

larger systems), but the latest swingeing<br />

Government cut of 64% - which means<br />

a headline domestic rate of 4.39p /kWh<br />

– are in addition to a cap on the tariff of<br />

£100 million up to 2018.<br />

This all means that solar PV is not<br />

nearly so attractive as it used to be<br />

for homeowners. Even so, electrical<br />

contactors and installers should be able<br />

to benefit, as the technology is not ►<br />

Copper and<br />

fibre-optic<br />

cables can be<br />

provided for<br />

surveillance<br />

and control<br />

and include<br />

sensor and<br />

bus cables<br />

(for tracking<br />

systems).<br />

2016 | ISSUE 03 Smart Electrician 27


smart meters<br />

will be<br />

absolutely<br />

essential<br />

to enable<br />

electricity to<br />

be sold and<br />

fed back into<br />

electricity grids,<br />

going away and it is needed to help<br />

meet the UK’s binding carbon emission<br />

reduction targets. However, for microgeneration<br />

electricity to be successful, it<br />

is essential that the latest ‘smart meters’<br />

be installed. These allow the monitoring<br />

of <strong>energy</strong> being consumed and fed-in to<br />

the grid.<br />

Smart meters calculate electricity<br />

units consumed, plus the amount<br />

exported. This data is sent to the supplier<br />

for monitoring and billing through<br />

connection with the homeowner’s<br />

consumer unit, or wirelessly transmitted<br />

to a receiver station up to 100m away<br />

using radio telemeters (RTMs) – or the<br />

Internet (perhaps as part of the Internet<br />

of Things).<br />

Note that smart meters will be absolutely<br />

essential to enable electricity to be sold<br />

and fed back into electricity grids, and<br />

for ‘smart grids’. In the future, for many<br />

applications, their use will be mandatory.<br />

Smart meter technologies include<br />

real-time sensors, power outage<br />

notification, power quality monitoring<br />

and automated meter reading (AMR).<br />

Importantly, their use will speed microgeneration<br />

growth. ■<br />

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Why have<br />

two types<br />

of wiring to operate<br />

a network device?<br />

In other words, why do you have to use a network<br />

cable for data transmission and an electric<br />

cable for power? This seemingly trivial question<br />

is creating a promising debate and laying<br />

the foundation of an industry with interesting<br />

possibilities for the future, generically called PoE<br />

(Power Over Ethernet), or inline power.<br />

PoE describes any of several standardised or<br />

ad-hoc systems which pass electrical power<br />

along with data on Ethernet cabling. This allows<br />

a single cable to provide both data connection<br />

and electrical power to devices such as wireless<br />

access points or IP cameras. Unlike standards<br />

such as Universal Serial Bus (USB), which also<br />

power devices over data cables, PoE allows<br />

long cable lengths. Power may be carried on<br />

the same conductors as the data, or it may be<br />

carried on dedicated conductors in the same<br />

cable.<br />

With the PoE standard, it is not necessary to use<br />

expensive coaxial cables with recording devices<br />

or security monitoring centres, such as those<br />

used with analogue video cameras, key-card<br />

and intercom systems. With a PoE network you<br />

use only one cable leading to a centralised PoE<br />

switch. This switch uses a single cable back to the<br />

recording device or security centre to transmit<br />

the data to all connected devices.<br />

What are the advantages of this approach?<br />

First, it is sometimes easier to get a network<br />

cable to a particular point in a building than to<br />

get an electrical cable. Consider the case of<br />

the surveillance cameras installed on a street or<br />

in a building, or an IP phone. The ability to use<br />

the same cable to power these and transmit<br />

the data, will greatly reduce installation costs<br />

by decreasing the amount of cabling required<br />

for the project and reduce the amount of manhours<br />

required to install the devices. Removing<br />

the need for even a single cable saves costs and<br />

maintenance. Moreover, PoE allows the ability to<br />

easily install devices that require power at any<br />

point in the network. For equipment that does<br />

not already have a power or data connection,<br />

PoE can be attractive when the power demand<br />

is modest.<br />

Another advantage lies in the fact that electric<br />

power is supplied only to the devices when they<br />

need it because they can be managed as<br />

nodes of the network and powered on/off at<br />

will - the equipment can be powered remotely.<br />

In other words, you can manage the power<br />

supply unit by unit at the same point from where<br />

the network is managed. Therefore, you can<br />

make an intelligent power management system<br />

using the devices on the network. For example,<br />

you can set up a mechanism whereby, in the<br />

event of any possible failure in the power supply,<br />

individual devices can be disconnected rather<br />

than disconnecting the entire network as a<br />

whole.<br />

The concept of PoE is only the beginning<br />

of a major transformation, the scope and<br />

ramifications of at this stage we can only guess<br />

at. We can imagine a network of billions of nodes<br />

(any person, machine and instrument, including<br />

RFID tagged papers, for example, could be<br />

a node), and that such a network is versatile.<br />

Today we do it through a physical cable,<br />

although in the future, perhaps we do it through<br />

the air, perhaps using microwaves. The bits are<br />

already sent wirelessly. Now if only the electrons<br />

could follow them. ■<br />

2016 | ISSUE 03 Smart Electrician 29


In a smart home, many of the appliances will<br />

be networked together, allowing access and<br />

operation through an EMS (Environmental<br />

Management System). An EMS provides the<br />

ability to turn on the heater or air conditioner from<br />

work or keep track of the <strong>energy</strong> use of specific<br />

appliances or equipment - for example, tracking<br />

the <strong>energy</strong> use of the pool pump, or seeing<br />

how much <strong>energy</strong> is saved by using the new<br />

dishwasher.<br />

The residences connected by smart grids are, in<br />

fact, the final component of the network itself.<br />

The way <strong>energy</strong> is consumed, generated and<br />

stored (or re-injected in the network) by the endconsumer<br />

influences the management of the<br />

network. This is a crucial factor when considering<br />

the issues regarding sustainability and <strong>energy</strong><br />

security, which society faces as this technology<br />

develops. So we ask: what are smart homes and<br />

what are their roles?<br />

Smart homes<br />

are a key element of the<br />

electricity sector<br />

Most environmental resources do<br />

not, formally, have a recognised<br />

market price. However, it is<br />

generally recognised that nature<br />

provides free goods and services<br />

that are important to our society,<br />

many of which are essential for<br />

our survival. This is the basis of socalled<br />

‘green economy’.<br />

The concept of the smart home first emerged<br />

several decades ago and predates the smart grid.<br />

The vision of the futuristic house was of a residence<br />

that supplied services to make life easier for its<br />

residents. Daily housekeeping was automated<br />

and a host of new devices was introduced. The<br />

incorporation of these new appliances, sensors<br />

and automation applications for various devices<br />

has greatly increased residential electricity<br />

consumption.<br />

Electricity consumption has advanced rapidly<br />

in countries where homes already incorporate<br />

the use of many appliances and automated<br />

processes. Added to this phenomenon of<br />

modernisation is population aging, which causes<br />

people to spend more time at home (and for<br />

longer), therefore increasing <strong>energy</strong> usage<br />

further. Having modernised and automated<br />

many daily actions, the residential sector now is<br />

a key factor in the global demand of electricity.<br />

This is the greatest paradigm shift. While the<br />

demand of electricity has increased significantly,<br />

scholars of the <strong>energy</strong> sector defend it as smart<br />

homes promote greater efficiency in production<br />

and <strong>energy</strong> consumption as well as increasing<br />

comfort by automating various services. To<br />

enable this, equipment is built to allow monitoring<br />

and control. There is software that turns lights and<br />

appliances on and off automatically according<br />

to the schedule and habits of its occupants. By<br />

incorporating such systems, smart homes are no<br />

longer a source of increased <strong>energy</strong> demand<br />

30 Smart Electrician ISSUE 03 | 2016


and instead become a source of <strong>energy</strong> savings,<br />

making the most of locally generated sources and<br />

taking into account the specific times you need<br />

to consume electricity, avoiding consumption<br />

at peak hours at higher rates where possible.<br />

However, maximising the benefits of the smart<br />

home is only possible if the house is well used.<br />

It’s no use if the house has a passive ventilation<br />

system and an automatic thermostat if the<br />

occupants leave the windows open, or schedule<br />

the equipment to operate during peak hours.<br />

Therefore, as well as investing in education so<br />

that people consume <strong>energy</strong> more efficiently,<br />

economic rewards and penalties were<br />

developed to help induce a change in the<br />

behaviour of companies and individuals, making<br />

them collaborate with the balance of the<br />

system. In the past, companies have been most<br />

heavily penalised in this way, however domestic<br />

customers will soon suffer in similar fashion, with<br />

suppliers hiking electricity prices by 99% at the<br />

peak time of between 4pm and 8pm.<br />

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Several pilot projects using residential tariffs that<br />

penalise consumption at peak times led to a<br />

reduction in demand of around 13 - 20%. When<br />

associated with modern technologies, the<br />

reduction was between 27 and 44%. We can<br />

conclude that these techniques work in driving<br />

down usage, but it is important that specified<br />

peak periods are relatively short - up to four hours,<br />

for example - as this will facilitate the changing of<br />

consumption habits.<br />

It is through good integration with intelligent<br />

networks that consumers will get the biggest<br />

benefits of houses of the future. Networks can<br />

help integrate power generation from new<br />

renewable sources produced in homes, as well as<br />

promoting the reduction of <strong>energy</strong> consumption<br />

at peak times.<br />

Because smart homes are integral components of<br />

the smart grid, their good use is vital to circumvent<br />

the problems of sustainability and <strong>energy</strong> security,<br />

which companies face. Successful integration is<br />

facilitated with the help of installers, specifically<br />

your participation as an installer is critical to the<br />

success of integration.<br />

It is the installer’s duty to inform the end-users how<br />

can they can maximise the use of their thermostat<br />

to avoid extra costs. If this doesn’t happen, as<br />

more and more end-users misuse their devices<br />

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Domestic, commercial and public buildings meeting the latest <strong>energy</strong> standards<br />

contain many <strong>energy</strong> saving devices and systems. However, many of these<br />

cannot be used with standard AC RCDs, which must be taken into account when<br />

designing the installation, to avoid fire and electrocution risk.<br />

NEW Buildings containing<br />

Green Technology<br />

specifying RCDs<br />

RCD safety for smart homes<br />

The increasing use of <strong>energy</strong> saving products and technology in smart<br />

homes has personal safety implications for UK home owners. Many<br />

electricians still order and install Type AC RCDs, without any regard to the<br />

electrical characteristics of the equipment connected to the supply.<br />

Why does the load affect the RCD selection?<br />

Energy saving technology, such as LED lighting, induction hobs and<br />

washing machines rely on power electronics to alter and or chop the<br />

electrical supply, i.e. producing non-linear load characteristics. Type AC<br />

RCDs can only be used with loads that generate sinusoidal leakage and<br />

residual currents (linear loads) see Fig 1. Inverters used in lighting control,<br />

speed control and power supplies produce complex leakage and residual<br />

currents affecting the tripping characteristics of standard AC RCDs. This<br />

phenomenon associated with magnetic saturation of the trip circuit, is<br />

commonly referred to as ‘RCD Blinding’.<br />

The risks associated with incorrect RCD selection<br />

RCDs are installed to provide ‘additional protection’ and or ‘fire protection’,<br />

when a primary protection method fails. Ensuring they work when called<br />

on to do so could mean the difference<br />

between life and death. Those involved in<br />

Specification, Design and Installation have<br />

a duty of care under the Health & Safety<br />

at Work Act 1974. Installation companies<br />

and the self employed should take note of<br />

the new sentencing guidelines issued by<br />

the Sentencing Council in February 2016,<br />

relating to breaches of H&S regulations.<br />

Existing guidance relating to RCDs – is it<br />

clear enough?<br />

Health & Safety at Work Regulations and the<br />

Electricity at Work Regulations 1989 (EWRs)<br />

reflect legal obligations as compared to<br />

non-statutory codes of practice such as the<br />

Wiring Regulations (BS7671), which only give<br />

advice. This relationship is important when<br />

making decisions relating to circuit design<br />

and the selection of RCDs for applications<br />

where the nature of the equipment<br />

connected in circuit could affect the safety<br />

performance of the RCD.<br />

Fig 1<br />

BS 7671 details minimum safety requirements,<br />

traditionally aimed at improving safety<br />

through non-statutory regulation in<br />

domestic and similar premises. This may not<br />

be sufficient in commercial and or industrial<br />

32 Smart Electrician ISSUE 03 | 2016


environments when considering the safety<br />

of employees and customers. In the event<br />

of an employee or customer receiving an<br />

electric shock from a 230V supply (potentially<br />

fatal in all instances), just meeting the Wiring<br />

Regulations may not prevent prosecution<br />

in the event of a breach of a Statutory<br />

Regulation. For example, BS7671 Regulation<br />

331 Compatibility of Characteristics covers<br />

the ‘assessment of characteristics of<br />

equipment likely to have harmful effects<br />

upon other electrical equipment in the<br />

installation’.<br />

There are some specific examples given in<br />

BS7671 (see Part 7) where type AC RCDs are<br />

not suitable, but this does not cover all the<br />

possible applications. An obvious example<br />

would be the connection of three-phase<br />

VSDs/ inverters into a circuit which has type<br />

AC or type A RCD protection upstream.<br />

Although it is not specifically stated in<br />

BS7671, we all know it is not safe to use three<br />

phase VSDs with anything other than type B<br />

RCDs.<br />

However, there are many applications<br />

where it is not so obvious and 331 is there<br />

as ‘catch all clause’. When installing any<br />

new equipment, either fixed, portable ►<br />

Equipment<br />

RCCB<br />

Type<br />

Inverters¹ heat<br />

pumps HVAC<br />

etc.<br />

Inverters heat<br />

pumps HVAC<br />

etc.<br />

Lighting¹<br />

control<br />

systems<br />

Residual / leakage current components<br />

AC 50Hz AC 50Hz pulse Smooth DC<br />

Solar/ wind¹<br />

generation<br />

AC<br />

>50Hz 6mA<br />

Table 1: Heat pumps use inverter based speed control<br />

Transient resistant<br />

3kA 8/20μS<br />

Current wave<br />

AC yes no no no no<br />

A yes yes < 6mA no no<br />

AKV yes yes < 6mA no yes<br />

F yes no < 10mA yes yes<br />

B yes yes yes 1 yes yes<br />

EV yes yes < 6mA² yes yes<br />

¹ Type B RCCBs detect DC residual currents and trip if the smooth DC current exceeds 30-40mA for<br />

30 Type A, AKV and F will function safely with smooth DC residual currents present up to the levels<br />

indicated, but they do not detect smooth DC. Therefore they must not be installed upstream of<br />

Type B RCCBs<br />

² Type EV RCCBs trip if the smooth DC current > 6mA i.e. Must only be used for protecting a single<br />

EVCP<br />

Table 2: General summary of RCCB limits of operation - refer to manufacture for full data<br />

2016 | ISSUE 03 Smart Electrician 33


or transportable, where RDC protection forms part of the<br />

‘Risk Reduction Measures’, the risk assessment must include<br />

a review of the existing installation and proposed RCD<br />

protection to ensure it is appropriate.<br />

Equipment requiring special types of RCD (RCCB) - Table 1<br />

Table 1 gives some generic examples based on the installed<br />

technology used and the associated RCCB. Equipment<br />

manufactures’ installation instructions must be checked with<br />

regard to advice relating to the minimum sensitivity and the<br />

type of RCD that can be used safely with their equipment.<br />

If the manufacture does not give any installation advice<br />

relating to the connection of its equipment to an RCD<br />

protected circuit, don’t assume it is safe to connect to any<br />

old RCD!<br />

RCCB checklist/ general limits of operation - Table 2<br />

more complex the design of RCCB required to detect those<br />

currents.<br />

Operational leakage currents for nonlinear loads can be<br />

significantly higher than conventional equipment, and must<br />

be taken into account when designing the installation.<br />

RCCB tripping current (sensitivity) must be selected based<br />

on the operational leakage currents, and the load circuits’<br />

sub-divided if necessary to prevent unwanted tripping, i.e.<br />

leakage currents must be added together for each item of<br />

equipment connected to the RCCB – see Regulation 531.2.4<br />

For more detailed information on specific applications<br />

relating to RCCB selection, please refer to Doepke’s Web<br />

site – Technical Articles and the company’s RCCB hand book<br />

(www.doepke.co.uk). ■<br />

By Chaz Andrews,<br />

technical manager, Doepke UK Ltd<br />

Understanding the different types of RCCB and the<br />

characteristics that may be specified by equipment<br />

manufacturers, reduces the risk of installing inappropriate<br />

and unsafe protection. In addition, it also helps during risk<br />

assessment for existing installations to identify potential<br />

dangerous situations and installations. RCCBs are designed<br />

and calibrated to operate in the presence of specific types<br />

of residual current, basically the greater the complexity<br />

of the residual current flowing under fault conditions, the


SMARTEFFICIENCY<br />

Ventilation has been raising the bar on efficiency, but now it is smarter too with a host<br />

of clever features that benefit installers and households alike. Ian Mitchell, Product<br />

Marketing Manager - New Build Residential at Vent-Axia explains.<br />

Efficiency is king. Manufacturers have been continuously<br />

re-designing ventilation to be as efficient as possible. As a<br />

result, mechanical ventilation with heat recovery (MVHR)<br />

has now reached incredibly high levels of heat recovery<br />

whilst specific fan powers are extremely low.<br />

Just a quick look at the Product Characteristics Database<br />

(PCDB), an online database that publishes independently<br />

tested product data, shows this trend. Sophisticated<br />

computational fluid dynamics used in the design process<br />

have helped the latest MVHR units achieve the holy grail<br />

of high efficiency and low sound levels. For example,<br />

Vent-Axia’s Lo-Carbon Advance is designed for New<br />

Build Residential applications and tops the PCDB list as<br />

the best performing MVHR unit in its class, with a specific<br />

fan power down to 0.38W/l/s, 93% heat recovery and<br />

trickle settings of up to 40% staying below 20dBA.<br />

Households also benefit from the App, using it to boost<br />

the unit and view efficiencies, flow and temperatures,<br />

enabling occupiers to achieve healthy indoor air quality<br />

(IAQ). Programmable controllers can schedule Advance<br />

to boost when it’s very warm or avoid boosting, perhaps<br />

when a baby is sleeping. And with thermal comfort, a<br />

significant issue in air-tight <strong>energy</strong> efficient new build<br />

properties, Advance includes a fully automatic 100%<br />

Summer Bypass, featuring an evening or overnight<br />

purge. This allows homeowners to choose when to take<br />

advantage of cooler air during hot summer periods. It<br />

also offers filters up to F7, ensuring that even homes in<br />

heavily urbanised areas can filter out most impurities,<br />

including damaging PM2.5 particles. A filter-check<br />

warning tells households via email or the App when filters<br />

need changing, therefore helping to maintain good IAQ<br />

and performance.<br />

Control is the next step in efficiency<br />

So with such high levels of efficiency built into MVHR units<br />

what’s next? As Pirelli once said “power is nothing without<br />

control”. Having achieved high levels of efficiency,<br />

ventilation companies are making their products smarter,<br />

with ever more sophisticated controls. One route is app<br />

control, which has multiple benefits. It gives homeowners<br />

more control of their <strong>energy</strong> by allowing them to control<br />

their ventilation and showing them their <strong>energy</strong> usage,<br />

which is key in reducing <strong>energy</strong> use.<br />

The next generation of MVHR therefore provides both<br />

<strong>energy</strong> efficient ventilation and pioneering control. By<br />

making ventilation smarter in this way, manufacturers<br />

have made ventilation that is simple to install, easy to<br />

use and even more <strong>energy</strong> efficient thanks to the greater<br />

level of control. For electricians, MVHR units offering<br />

this new connectivity are a great fit in the smart-home<br />

market, whilst also offering simplified commissioning and<br />

installation and a host of added value features that will<br />

appeal to developers and homeowners alike. ■<br />

Meanwhile, app-controlled commissioning offers<br />

simplified installation and improved performance, saving<br />

time and money. One example is when installers use a<br />

vane anemometer to measure airflow, they can use a Wi-<br />

Fi enabled App to control airflows during measurement,<br />

making it unnecessary to repeatedly return to the unit to<br />

adjust fan speeds. This simplifies and reduces installation<br />

time, ensuring accurate commissioning and efficient<br />

performance, so encouraging best practice.<br />

£<br />

The Advance is the first web-enabled UK-manufactured<br />

MVHR unit and is fully autonomous but provides interactive<br />

control via a free App or on-board screen. With a simple<br />

to use interface. Installers can pre-commission Advance<br />

through its USB functionality, saving time on developments<br />

with same specification builds.<br />

2016 | ISSUE 03 Smart Electrician 35


36 Smart Electrician ISSUE 03 | 2016


IEA study calls for electricity market reinvention<br />

To ensure electricity sustainability and supply security, a new International Energy Agency<br />

report prescribes a changed balance between regulation and competitive markets. The<br />

organisation believes that the global nations should use the latest technologies to achieve<br />

this as the world moves to low-carbon power generation.<br />

Electricity markets around the world are currently<br />

undergoing a vast transformation, in part because<br />

the drive towards low-carbon power generation<br />

is moving the sector towards high investment in<br />

renewables and other new technologies – such<br />

as smart grids. This is so despite the fact that<br />

electricity supply demand is stagnating (and<br />

even declining) in many countries. So it is timely<br />

that the International Energy Agency (IEA) has<br />

just released its latest study entitled ‘Re-powering<br />

Markets: Market design and regulation during the<br />

transition to low-carbon power systems’.<br />

This report draws upon the IEA’s review of best<br />

practices in electricity market design, principally<br />

in Europe, the US and Australia. It offers guidance<br />

to governments, regulators, companies and<br />

investors on how to transition to low-carbon<br />

generation and achieve their COP21 pledges.<br />

Modernised regulation<br />

The report states that the market rules need to<br />

be modernised and better matched with low<br />

carbon policies while still keeping the same<br />

overall market architecture. It also states that<br />

what it calls a ‘robust’ carbon price is needed in<br />

the transition to a low carbon system. This will help<br />

understand the values of the various existing, new<br />

and future low carbon technologies.<br />

The IEA also suggests that regulation of electricity<br />

distribution be modernised to take into account<br />

the potential of the massive <strong>energy</strong> storage<br />

battery systems being developed (suitable for<br />

use with wind power in particular). It is also crucial<br />

to take account of those increasing numbers<br />

of consumers who also produce renewable<br />

electricity and sell some of it back to power grids.<br />

Essentially, the study says that countries should<br />

reinvent the way they produce, trade and<br />

consume electricity to make the shift towards<br />

a low carbon system. Nations, the organisation<br />

believes, should redesign their <strong>energy</strong> markets by<br />

ensuring investment in low carbon technologies<br />

and <strong>energy</strong> efficiency, as well as guaranteeing<br />

security of supply. The essential need is for<br />

efficient markets that can ‘unlock’ flexibility to<br />

deal with renewables’ variability, as well as cope<br />

with weather forecasting errors and network<br />

congestion. This is crucial, bearing in mind the<br />

recent Paris COP21 target of 2oC maximum<br />

atmospheric temperature rise agreed is a part<br />

of the global deal to reduce greenhouse-gas<br />

emissions. Exceeding this agreed ceiling will<br />

trigger the most dangerous disruptions to the<br />

environment, say UN scientists.<br />

Meeting the agreed target will be very costly.<br />

The deal struck at COP21 requires an overhaul of<br />

historic proportions for <strong>energy</strong> policies worldwide<br />

and a huge investment in cleaning up the<br />

pollution now damaging the Earth’s atmosphere.<br />

The targets, involving 195 countries, will require<br />

£11.7 trillion of spending on renewables and<br />

efficiency through 2030, according to the IEA. Yet<br />

the world cannot afford to go on as it is.<br />

Additionally covered in this report are the<br />

opportunities that demand response offers<br />

through dynamic pricing and the pooling of<br />

consumers through new technologies. Such<br />

technologies include electric vehicle (EV)<br />

charging – as well as their being used to supply<br />

electricity back to the grid at certain times – and<br />

others.<br />

Cannot be compromised<br />

Commented Fatih Birol, IEA Executive Director:<br />

“For a century, a centralised high-carbon power<br />

system kept the lights on. The price has been<br />

the generation of over a third of global carbon<br />

emissions. Thus, to gain the full social and political<br />

support required for decarbonisation, the level of<br />

supply security that society has come to expect<br />

cannot be compromised. “If regulatory regimes,<br />

market design and system operation end up<br />

lagging behind technology deployment, the<br />

result may undermine electricity security and<br />

ultimately, the low carbon transition itself,” he said.<br />

Ultimately, the IEA believes, there is no definitive<br />

market design for the low-carbon <strong>energy</strong> systems<br />

of the future. However, governments and industry<br />

around the world must adjust as new technologies<br />

prompt constant evolution. ■<br />

2016 | ISSUE 03 Smart Electrician 37


Buildings for better space<br />

ABB recently launched its new building portal featuring<br />

the company’s full range of innovative building<br />

technologies that offer customers sustainable solutions<br />

and modern design.<br />

Recent technology advances, the rise of government<br />

mandated <strong>energy</strong> tariffs and regulations as well as<br />

higher utility costs, have put increased focus on cutting<br />

building <strong>energy</strong> costs and reducing their environmental<br />

impact. Across the full portfolio of ABB, the company<br />

has a range of solutions to meet the needs of building<br />

operators, facilities managers, systems integrators,<br />

developers and electrical installers – and even home<br />

owners.<br />

Cutting <strong>energy</strong> costs<br />

“Companies are increasingly implementing<br />

sustainability initiatives that also focus on <strong>energy</strong><br />

efficiency in the buildings they operate,” says Philip<br />

Juneau, ABB’s Head of Global Strategic Alliances,<br />

Building Automation, Low Voltage Products division.<br />

“With buildings consuming about 40% of the world’s<br />

<strong>energy</strong>, ABB can help customers achieve 20 to 40% in<br />

potential <strong>energy</strong> savings.”<br />

Your Space<br />

The new portal focuses on two distinct segments. Living<br />

Space which features residential and home solutions.<br />

And with Building Space, ABB offers building solutions<br />

for commercial and industrial buildings including hotels,<br />

hospitals or other public buildings such as universities or<br />

stadiums. With the new building portal, customers can<br />

now more easily navigate ABB’s broad portfolio that<br />

offers building owners and their occupants’ the highest<br />

standards in comfort, efficiency, security and simplicity.<br />

Energy efficiency and comfort<br />

“With today’s technology advances, the building<br />

industry is embracing new opportunities to improve<br />

<strong>energy</strong> efficiency and building occupants comfort,”<br />

added Phil. “We are seeing a trend in building<br />

automation where all the different types of electrical<br />

and mechanical components and systems are<br />

converging to provide an intelligent ‘Smart Building’<br />

approach solution to building management and<br />

automation, especially with the advent of the Internet<br />

of Things (IoT).”<br />

Better Space Hotel<br />

A special feature of the portal is the interactive<br />

‘Better Space Hotel’ – a virtual hotel application that<br />

customers can use to easily locate ABB components<br />

from low voltage products to drives and motors to<br />

power products. ■<br />

38 Smart Electrician ISSUE 02 03 | 2016


Future proof & easy to use home automation?<br />

Certainly.<br />

Free@home ® is the new easy to use home automation system. From lights and<br />

heating, to curtains and door communication. Free@home provides a quick<br />

and easy way to meet all your customer’s home automation needs.<br />

Free@home ® is also totally user-friendly - you’ll be ready to use the system after only<br />

half a day’s training (which is provided free!). For more information or to book a free<br />

training session please call 0333 999 9900 or visit www.abb.com/freeathome<br />

ABB UK.<br />

Tel: 0333 999 9900<br />

Fax: 0333 999 9901<br />

E-Mail: LV.enquiries@gb.abb.com


THE FUTURE OF MULTI-ROOM AUDIO<br />

Gary Lewis, Director at UK home integration firm and CEDIA member company, Cornflake,<br />

looks at challenges and opportunities within today’s whole-home audio system sector.<br />

Multi-room audio has become a ‘must have’ – rather<br />

than a ‘would like’ – feature for many clients. The<br />

first generation of internet babies is coming through<br />

strongly now and building homes that are completely<br />

different to their parent’s generation. They expect<br />

cinema-grade surround sound, and wireless access<br />

to their digital music and streaming services… and<br />

they want it at any time, in every room, without any<br />

connection complications.<br />

The major challenge is that clients are often confused<br />

about wireless technology. They fail to appreciate the<br />

system doesn’t run on fresh air; or that the equipment<br />

still needs power from somewhere. It’s an easy mistake<br />

given all the wireless hype, but once clients appreciate<br />

the pitfalls of trying to do everything wirelessly,<br />

especially with multiple, demanding wireless devices<br />

in their households, they quickly value the advantages<br />

of wired systems.<br />

Modern families might have one router with everything<br />

connected to it, including their TVs, PlayStations,<br />

printer, mobile devices, and a multitude of teens/<br />

guests laptops and gaming equipment too. But<br />

many routers supplied as standard by broadband<br />

suppliers often can’t handle that amount of traffic,<br />

which causes complications with some wireless music<br />

systems. If the audio system is hardwired, with a<br />

wireless connection, it is much more stable.<br />

Usually, our clients are familiar with - and enjoy using -<br />

a record player or a Hi-FI system, but now parts of that<br />

system, such as the CD and/or the tuner, are required<br />

to be distributed throughout the house, often through<br />

a multi-room system.<br />

Generally, people love instant online music services;<br />

making life much easier for CI (custom installation)<br />

installers as we can simply count all the music zones,<br />

and scale projects accordingly. Multi-room systems<br />

used to have limitations of perhaps four zones, six zones<br />

or eight zones, which incorporated the amplification<br />

of these zones. Now, the new multi-room solutions are<br />

highly modular, and everything is addressed by IP,<br />

40 Smart Electrician ISSUE 02 03 | 2016


which is far quicker and simpler for the integrator.<br />

New entrants to the CI market may be surprised to<br />

learn that installing multi room audio systems is not<br />

as lucrative as they might assume. The streaming<br />

services we all access are now well commoditised,<br />

and several multi-room systems are easily available<br />

through high street and online retailers, plus there<br />

are a growing number of DIY options.<br />

It’s a familiar marketing cycle. As soon as a new<br />

technology goes main-stream, the distribution<br />

channels increase and specialist installers lose<br />

margins. This is just natural progression and, as ‘early<br />

adopters’, it’s important for installers to add value to<br />

our client’s lives by staying abreast of what’s coming<br />

next and offering professional advice to help them<br />

future-proof their investment. Good system design,<br />

qualified installation and appropriately-chosen<br />

speakers are all important elements of a professional<br />

whole home audio solution, with customers willing<br />

to pay for quality and expertise in these areas.<br />

There have always been people who love high-end<br />

Hi-Fi. Many of the clients who pioneered multi-room<br />

audio – long before the quality was as great as it<br />

is today - are now on their second or third homes.<br />

Testimony to the success of their early systems, these<br />

customers continue to want integrated audio in<br />

their new properties but are now demanding that<br />

it sounds far better and are willing to spend much<br />

more money on higher quality speakers to achieve<br />

their higher expectations. The top-end of the<br />

market will always be pushing for excellence, which<br />

is great for CI installers and for the mass market, as<br />

the new technology will inevitably trickle down the<br />

supply chain.<br />

Advertise<br />

your<br />

product<br />

or service<br />

here<br />

That’s why high resolution audio, distributed either<br />

wirelessly or wired, is the next big thing. But clients<br />

will, of course, need more robust broadband<br />

infrastructures able to support this better quality<br />

audio and 4K video. For instance, Netflix needs at<br />

least six megabits per device. As a comparison,<br />

hi-resolution music requires only about a sixth of<br />

that capacity and radio needs about an eighth.<br />

If the client’s broadband infrastructure has the<br />

proper capacity, then the quality threshold will<br />

duly increase. Many CI installers will have to refocus<br />

their business models to provide a far greater<br />

premium experience for ever more sophisticated<br />

and discerning customers. That is what custom<br />

installation is all about and what makes it so<br />

exciting. ■<br />

TELEPHONE:<br />

0207 751 3902<br />

*<br />

EMAIL:<br />

amy.latchana@voltimum.com<br />

The products and services profiles on these pages are paid-for advertorials


SAVANT & VOLTIMUM<br />

TAKE CENTRE STAGE AT<br />

SMART BUILDINGS 2016<br />

The UK’s only dedicated event to integrated building<br />

technology, Smart Buildings 2016, is back for another year<br />

and is set to be bigger and more electrifying than ever.<br />

Taking place on 18 – 20 October at the Birmingham NEC,<br />

the show will once again form part of the unique and all<br />

encompassing line up at UK Construction Week.<br />

very excited to be working with Smart Buildings 2016, as part<br />

of the wider UK Construction Week. The show will be of huge<br />

benefit to our users, who will be able to visit the show and get<br />

exclusive insights through Voltimum, and to our manufacturer<br />

partners who will be showcasing the latest technologies at<br />

the event.”<br />

Showcasing the latest innovations in smart building<br />

technology, the event will cater for professionals across the<br />

full spectrum of the sector from home automation to climate<br />

control, lighting, access and security, workplace technology,<br />

entertainment systems and the Internet of Things.<br />

As a recognised leader in the field of home control and<br />

automation, Savant will exhibit its range of connected home<br />

technology at Smart Buildings 2016 and launch its new<br />

Savant Pro app and Savant Remote. From adjusting lighting<br />

to controlling entertainment, Savant aims to change the<br />

way we enjoy homes and create a more interconnected,<br />

responsive environment.<br />

As well as exhibiting, Voltimum, the leading portal for<br />

the electrical industry, will provide support at this year’s<br />

event. It will use Smart Buildings 2016 to promote intelligent<br />

connected technologies that can be integrated into the<br />

Internet of Things. Voltimum will focus on how the market<br />

can be more prepared for the widespread adoption of the<br />

Internet of Things and other smart solutions. What’s more, as<br />

part of a broader educational programme it will host live<br />

debates from some of its leading partners.<br />

Nathan Garnett, Show Director at Media 10 commented:<br />

“We’re delighted to have attracted so many exciting and<br />

innovative companies to Smart Buildings 2016. This event will<br />

give attendees and exhibitors alike a real sense of how the<br />

technologies that surround us are evolving. Registration is<br />

open for visitors now and we still have some space left for<br />

exhibitors so don’t miss out and get in touch soon to avoid<br />

being disappointed.”<br />

Central to the 1,000 square metres plus of floor space will<br />

be the Smart Buildings Hub. Playing host to pioneering<br />

seminars, CPDs, debates and workshops, the Hub will also<br />

be an exemplar building structure exhibiting the latest smart<br />

products and technologies. With help from the groundbreaking<br />

studio Wiki House, the Smart Buildings Hub will<br />

provide a glimpse into the future of offsite construction and<br />

its facilitation with smart technology.<br />

New for 2016, the show will also stage a dedicated Workplace<br />

Zone. This space allows companies like Framery, who cater<br />

specifically for the smart technology market in commercial<br />

applications, to showcase products like connected furniture,<br />

AV systems, conference technology and virtual workplaces.<br />

Commenting on its collaboration with Smart Buildings 2016,<br />

Voltimum Managing Director, Eddie Embleton said: “We’re<br />

Get your free ticket at www.smartbuildingslive.co.uk and<br />

follow @sbshowUK on Twitter. ■<br />

42 Smart Electrician ISSUE 03 | 2016


THE UK’S LEADING EVENT DEDICATED TO<br />

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PART OF

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