EoW March 2013

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March 2013 41
News
Technology
Reliable rod welders
from PWM
Precision engineered to produce
strong, reliable permanent welds on
non-ferrous materials, PWM cold pressure
welders offer manufacturers a fast,
economical method of joining large rod
sections up to 30mm (1.181") diameter.
Quicker, cleaner, and ‘greener’ than
electrical butt-welding, the cold weld
process creates a reliable permanent weld
stronger than the parent material without
sacrificing electrical integrity.
PWM’s range of rod welders includes
the P1500, P1000 and EP500 models.
Designed and built in PWM’s own UK
workshops, these robust, heavy-duty
machines are energy efficient, low
maintenance and easy to operate.
The EP500 electro/pneumatic cold welder
is one of PWM’s best-selling machines.
Dependable and easy to operate, it
will weld copper rod 5mm to 12.50mm
(0.197" to 0.492") and aluminium rod
5mm to 15mm (0.197" to 0.590").
The compact hydraulic P1000 machine,
for copper rod 6mm to 16mm (0.236" to
0.630") and aluminium rod 6mm to 20mm
(0.236" to 0.790"), is equipped with quick
release dies and an easily adjustable die
setting mechanism.
PWM’s top of the range model, the P1500
electro-hydraulic rod welder will weld
copper rod from 15mm (0.590") up to
25mm (0.984"); aluminium up to 30mm
(1.181"). Power consumption is limited to
the hydraulic pump motor, making the
P1500 very economical to operate. No
set up time is required and the weld cycle
takes about four to five minutes, with
the weld flash removed automatically on
completion.
Video demonstrations of the EP500,
P1000 and P1500 are available at www.
pwmltd.co.uk
Most non-ferrous materials, as well
as various alloys can be welded. As a
specialist manufacturer of cold welding
equipment for nearly 30 years, PWM is
always happy to provide advice on cold
weld techniques and applications.
PWM Ltd – UK
Website:
▲ ▲ The P1000 hydraulic rod welder
Improved testing of power distribution
equipment during the installation of
cables is provided by the Cropico DO4000
range of high performance, digital
milliohm meters now available from
Seaward.
The portable and rugged
instrument features a number
of advanced features to test
and measure accurately the
integrity of switchgear cable
joints and other distribution
equipment to ensure they are
fully maintained and function
correctly.
These include forward and
reverse current measurement
with auto averaging, true
current zero, long scale
length and a selectable
measurement range from
40mΩ to 4kΩ with respective
resolutions between 10μΩ
and 1Ω.
Within the range, model 4001 also
includes temperature compensation,
with preset coefficients for copper and
aluminium plus user settable coefficients
for other materials. Temperature
measurement over the range –50 to
+800ºC is also available.
Protection up to 415V
rms is provided at the
measurement terminals and
push button operation is
achieved easily by clearly
marked function controls.
Direct reading measured
values are displayed on a
four-digit LCD display.
Over range and low battery
indication is also provided
and warning LEDs illuminate
when an open circuit lead
condition is detected.
The 4000 series can be
supplied with long leads
to allow for accurate
measurement of large blades
and a rechargeable battery option includes
a battery pack, docking station and charger.
Seaward Group – UK
Website:
DO4000: Power distribution cable integrity
▲ ▲ The Cropico DO4000 from
Seaward