Page 19 - SPARKS APRIL 2013 1-28 LOW RES

sparks
ELECTRICAL NEWS april 2013
19 motor control centres and motor protection
High accuracy current transducers
added to PCB-mount range
LEM has introduced the LA 130 -
150 series of current transducers
for use in motor drives, inverters,
power supplies and general indus-
trial applications. These printed cir-
cuit board (PCB) mounted devices
share a common, compact case
outline, and are available to meas-
ure nominal full-scale currents of
130 and 150A. Thanks to the ap-
plication of LEM’s established ex-
pertise in Closed-Loop Hall Effect
transducer technology, the LA 130
- 150 series offers high-accuracy,
extremely linear measurements at
a very competitive price.
The LA 130-150 series meas-
ures dc, ac, and pulsed currents,
IN a tough economy, when financial
resources are stretched, the success-
ful electrical contractor knows that to
stay in business, he has to buy quality
products at an affordable price with
big brand backup, says HughWard,
group commercial manager at the
Voltex Group.
“This successful contractor appreci-
ates a supplier who understands that
his work hours are not limited to office
hours. This is why the Voltex Group
has embarked on its Engage cam-
paign where we have partnered with
30 of our preferred suppliers to deliver
R1-mworth of prizes drive campaign
ABB’s Gemini range of thermoplas-
tic enclosures can be used in almost
any kind of environment, including
extreme weather conditions, says
ABB’s Basil Mofokeng.
Suited for control and command
as well as distribution applications,
the range offers six sizes, with
internal dimensions from 300(H)
x 250(W) x 180(D) mm to 900(H) x
750(W) x 330(D) mm.
“The thermoplastic mate-
rial’s characteristic strength and
environmental resistance used in
the Gemini range, combinedwith
ground-breaking design andmanu-
facturing techniques, ensure that
Versatile enclosure
solutions
a direct connection between our sup-
pliers and our customers,”addsWard.
Stanley Green, managing director
of the Voltex Group continued these
sentiments, saying,“There are rapid
and dramatic changes happening
in the electrical industry and with
Voltex’s new social media platforms –
Facebook, Twitter andYouTube – it is
now possible to engage directly with
our customers in a whole newway.”
Voltex is a member of the Bidvest
Group and Brian Joffe, CEO of the Bid-
vest Group, says,“We are in a world of
great change and that rate of change
is extreme. We need to embrace the
change that lies ahead and become
even bolder going forward, bring a
strong focus tomaking returns.”
The Voltex Engage campaign,
which will run until May this year, will
see Voltex inviting its customers to
‘engage’with themonmany levels –
on social media, email and sms.
“Lucky customers who
take up our offer to con-
nect with us as silver, gold or
platinum status customers
make themselves eligible for
R1-million worth of prizes,”says
Jannie Louw, Voltex groupmarketing
manager.
The preferred suppliers are: 3M, ABB,
Aberdare Cables, Allbro, Alvern Cables,
Bright Star Lighting, Cabstrut, CBI,
CCG, Crabtree, CRC, First Tech Lighting
& Electrical, Hadaad Engineering, Hel-
lermannTyton, Kemtek Imaging Sys-
tems (Brother), Lear Imports, Legrand,
Lesco, Major-Tech, Osram, Philips,
Radiant, Reeflite, Schneider Electric,
South Ocean, Stone Stamcor, Three-D
Agencies, Voltex Lighting, Voltex LSis,
andWaco.
To find out more about this cam-
paign, go to: www.voltex.co.za
these enclosures offer a high degree
of protection (IP66) for extended
periods of time,”explains Mofokeng.
Themodular, snap-onmount-
ing frame integrates easily with
a comprehensive range of acces-
sories, installable without the use
of special tools. Three base-plate
options are provided for automation
applications, which can be snap-on
mounted.
Accessories include blank and
pre-cut panels, hinged inner
doors, base plates, Tmax MCCB
installation kits and ventilation/anti
condensation kits.
Enquiries: (010) 202-5000
providing an output in the form
of a current signal proportional to
the measured (primary) current.
Two conversion ranges – a factor
of 1 000 or 2 000 – are offered, with
two mounting styles. The transduc-
ers can be supplied with an open
aperture through which the cur-
rent carrying the primary current
is routed; or they can be supplied
ready-fitted with a primary con-
ductor that will connect direct to
the host PCB. Within the 33.5(H) x
37(W) x 16(D)mm outline, the con-
ductor aperture is a generous 13.5
x 10mm. In form, footprint and
function the LA 130 - 150 series is
backward-compatible with LEM’s
prior-generation devices.
LA 130 - 150 transducers feature
a wide maximum bandwidth of
dc to 150kHz (-1dB point) and an
accuracy of better than 0.5% at
the primary nominal RMS current
and at ambient temperature.
Typical linearity error is ±0.1% at
nominal current and the maximum
offset temperature drift is ±0.46%
of nominal current from -40 to
+85˚C. The Closed-Loop Hall-effect
technology results in zero insertion
losses and a fast response time of
less than 500nsec.
The LA 130 - 150 series will find
application at multiple points
within variable speed ac motor
and servo motor drives; in static
converters for dc motor drives;
monitoring currents in battery
supply installations, and in uninter-
ruptible power supplies (UPSs);
in specialist power supplies, for
example, welding PSUs; and in
switch-mode power supplies in
general, together with a wide
range of other industrial, domestic-
appliance and HVAC (heating,
ventilating and air-conditioning)
applications.
Enquiries: (011) 626-2023