Electricity + Control January 2016

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ROUND UP
Adding to the range of electric motor circuit breakers for harsh environments
The addition of two new models to the
WEG MPW range of motor protection circuit
breakers will offer customers a broader
range from which to select the most ap-
propriate protection for electric motors. All
motor protection circuit breakers in theWEG
MPW range aremanufactured in accordance
with IEC 60947 and UL 508 international
standards giving absolute assurance in
terms of operational parameters and quality.
These devices offer the major benefit
of being compact and modular, which al-
lows space saving within the electrical
panel itself. This means that the panel
can be smaller or where necessary more
components can be included in the panel.
Engineered to withstand harsh operating
conditions, the WEG MPW range of motor
protection circuit breakers are robustly
constructed for optimal reliability.The range
facilitates the protection of a wide range
of electric motors from 0,16 A up to 100 A.
Significantly, theWEGMPW range has both
thermal magnetic versions which provide
protection against any potential short circuit
and overload conditions and magnetic only
versions which provide protection against
short circuits. Use of the thermal magnetic
device will reduce the amount of compo-
nents required whenmanufacturing amotor
control centre and this can translate into a
significant cost saving. The magnetic-only
version allows the use of electronic over-
load protection devices which can reduce
costs further.
Enquiries: Kirsten Larkan onTel. 011 723 6000
or email or
visit
First 50 kA-rated, arc-resistant,
MV regenerative drive
Rockwell Automation has introduced the industry’s
first 50 kA, arc-resistant Medium-Voltage drive fea-
turing full regeneration capabilities. The advanced
ArcShield technology from Rockwell Automation adds
to theAllen-Bradley PowerFlex 7000 MV drive product
line. Combined with an integrated arc-resistant Allen
Bradley CENTERLINE starter, the new PowerFlex 7000
drive system with ArcShield technology provides a
fully integrated, arc-resistant starter-and-drive system.
The ArcShield technology redirects hazardous en-
ergy and gases created from an arc-flash event away
from personnel. This helps reduce safety risks and
protect equipment in heavy process industries, such
as oil and gas, mining, power generation, and water
and wastewater treatment.
The arc-resistant system is certified tomeet the most
stringent and comprehensive set of global arc-resistant
standards. It provides a 50 kA arc rating and also meets
Type 2B protection to provide full perimeter personnel
protection, even when the low-voltage control door is
open for maintenance purposes.
“The PowerFlex 7000 drive system with ArcShield
technology is the latest addition to our growing port-
folio of arc-resistant products. It has been developed
to support the increasing requirements of the electri-
cal safety programs implemented by our customers,”
said Henry Craukamp, ETO Sales Manager, Rockwell
Automation, Southern Europe andAfrica Rockwell Au-
tomation. “The new drive system offers an integrated
safety solution to reduce the safety burden put on
industrial end users. Our unique designs were influ-
enced by direct feedback and requirements requested
by customers.”
Enquiries: Henry Craukamp.Tel: 011 654 9700 or email
Frequency converters enable lean automation
Demand-oriented motor control is enabling users to reduce their electricity
consumption by up to 80% compared to fixed-displacement drives. Bosch
Rexroth has recently added two new models to its range of frequency convert-
ers, the EFC 3610 and EFC 5610, to provide intelligent speed and torque control
for motors from 400 W up to 18,5 kW. Bosch Rexroth’s EFC-class frequency
converters are open-source, scalable and expandable drive controls that are
easily integrated into many different kinds of machines and automation en-
vironments, including in pumps, compressors, fans, conveyors, presses and
packaging machines.
The EFC 3610 is a universal, low-cost converter for control and demand-
oriented energy supply for almost all industry segments.The EFC 5610 is a high-
torque solution with efficient, high-performance vector control for specialised
requirements and an expanded power range (up to 18,5 kW). Both are available
in heavy-duty and normal-duty configurations.The communications interface
of the EFC converters has expanded to include support for Modbus, Profibus
and CAN bus protocols. Pluggable I/O connection terminals and fieldbus
modules enable a high degree of expandability and flexibility in the way drive
architectures can be configured. Integrated brake choppers and mains filters
(EN61800-3 C3) reduce the need for external componentry, enhancing the plug-
and-play functionality of these products. Process control is improved through
integrated PID controllers alongside an eight-step sequence control system.
Enquiries: GeorgVenter.Tectra Automation.Tel: 011 974 9400
or email
DRIVES, MOTORS + SWITCHGEAR
Electricity+Control January ‘16 22