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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
enlighten (verb)<br />
make it easier<br />
Find all the product data, brochures news and<br />
technical advice you need in one place<br />
WAITING FOR<br />
The IoT revolution is changing the way you work, as an<br />
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connected lighting, will also see significant benefits for you<br />
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 />
All this new technology means there are lots of new terms and<br />
concepts to learn. But don’t worry if you’re not completely<br />
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January 2016)<br />
is to (as far as<br />
reasonably<br />
practicable)<br />
contain any fire<br />
within the non<br />
combustible<br />
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enclosure and to minimise flames from escaping.<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 />
the demand for a professional induction will rise. ■<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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18-20 OCTOBER | NEC<br />
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