WNIP JUL AUG 19.4 Digital

15
Failsafe photovoltaic systems
thanks to network technology
in accordance with IEC 61850
Fault tolerance is a fundamental
requirement for energy
system networks. As an essential
part of modern energy supply,
photovoltaic systems play an
increasingly important role in
ensuring the stability of the
energy network. System failure
– and resulting power outages –
can have serious consequences.
Therefore, the components
used in energy system networks
must meet extremely stringent
electromagnetic, electrostatic,
and climatic environmental
requirements. In addition
to a specific protocol and
data specification in Part 7,
international standard IEC
61850 also defines these special
requirements for network and
automation products.
Phoenix Contact therefore
provides extremely robust
network infrastructure and I/O
components for use in energy
systems. The requirements of IEC
61850-7 and the requirements
of standard IEEE 1617 have been
verified and certified by the
independent laboratory institute
KEMA. The portfolio includes
Managed Switches as well as
Unmanaged Switches, media
converters, and redundancy
modules for the custom
configuration of networks in
energy systems.
All devices are available in
book format for use in the control
cabinet, Managed Switches are
also available in 19” format for use
in 19” cabinets. Furthermore, the
redundancy modules support
the Parallel Redundancy Protocol
(PRP). This means that network
devices can be integrated into
two parallel networks in order to
achieve high fault tolerance and
bumpless redundancy without
switch-over times.In addition, the
network products are generally
protocol-independent, which
means that they can also be used in
networks that are based on other
protocols such as DNP 7.0 and IEC
60870-5-104.
patrickr@phoenixcontact.co.za
VA purgemeters with surface
passivation for trace-level
analysis
Trace-level analysis is used
for providing evidence of
very small concentrations in the
range of ppm (parts per million)
to ppb (parts per billion). Here,
it is very important that none
of the particles to be detected
are already adsorbed in the
sample feed line as this would
lead to a delayed or even wrong
analysis result. Examples are the
measurement of H2S content in
natural gas or oil, mercury, or NOx/
SOx flue gas analysis in various
industries.To avoid adsorption,
sample feed lines, fittings and
valves can be surface passivated.
This can now also be applied to
the DK 72, DK 74 and DK 77 allmetal
purgemeters that are used
for adjustment and monitoring of
the sample flow to the analyser.
Before being assembled and
calibrated, all metal components
in contact with the medium such
as cone, float, valve components,
etc., receive a SilcoNert 2000 inert
silicon coating, a patented surface
treatment at a temperature of
400°C / 752°F. The same is possible
for wetted metal components of
DK 46, DK 47, DK 48 and DK 800
glass devices.
salesza@krohne.com
m3/h
l/h
m/s
fact
Accurate, reliable and
durable flow measurement
in chemical processes
OPTIFLUX 5000 series –
technology driven by KROHNE
• Electromagnetic flowmeters
with ceramic measuring tube for
aggressive and abrasive fluids
and slurries
• Vacuum resistance, form stability
with under or over pressure,
diffusion tight
• Leak proof with fused-in Cermet
electrodes
• –40...+180 °C, DN15...300
• Pressure equipment directive
(PED/DGRL)
• FM, CSA, ATEX, IECEX
KROHNE South Africa
8 Bushbuck Close, Corporate Park South
Randjiespark, Midrand, Tel.: +27 113141391
Fax: +27 113141681, John Alexander,
j.alexander@krohne.com, www.za.krohne.com
19.4
°C
µS/cm