Weldmatic 200i + Weldmatic 250i
Model No CP137, CP138
11
5 Installation
Connection to Electrical Mains
Power Supply
200i
The Weldmatic 200i is factory fitted with a
3 metre, 3 core 2.5mm
2
Heavy Duty PVC
mains power supply cable with moulded
3 pin, 15 Amp, Single Phase plug.
A 15 Amp plug and socket is recognisable
by a wide Earth pin. Power Supply authorities
require that equipment fitted with a 15 Amp
plug shall ONLY be connected to a 240 Volt,
15 Amp power point. DO NOT modify
the plug.
The minimum capacity of the mains wiring
and power outlet supplying a welder is
selected according to the effective primary
current of the equipment. The effective
primary current Ieff for the Weldmatic 200i
is 14 Amps.
The minimum recommended mains circuit
breaker rating for a Weldmatic 200i is
20 Amps.
250i
Note:
All electrical work shall only be
undertaken by a qualified electrician.
The Weldmatic 250i is factory fitted with a
3 metre, 3 core 2.5mm2 Heavy Duty PVC
mains power supply cable with moulded 3
pin, 15 AMP, Single Phase plug.
15A Supply Limited Output
To operate the machine with the 15A plug
from a 15A mains supply, the output of the
machine needs to be limited, so as not to
exceed primary current Ieff 15A.
Check the output amps on the digital
display at end of weld. If output is higher
than 200A the voltage and wire speed
should be reduced.
With the output limited to 200A, and the
input to 36A. (Based on conventional load).
Then operation at 10% duty cycle (i.e. 1
minute on, 9 minutes off) will maintain an
effective input current Ieff of 15A.
Maximum rated output
To achieve the rated output of 250A 20%
the machine requires maximum primary
current Imax 45A and Effective primary
current Ieff 20 Amps.
The machine needs to be fitted with a
plug capacity 20A or greater, and a supply
capacity 20A or greater.
The minimum recommended supply
circuit breaker rating for a Weldmatic 250i
is 25 Amps.
Successful operation
Successful operation will depend on a
number of factors:
• Variation in circuit breaker thresholds.
• Ambient temperature
• Number of previous circuit breaker
operations
• Actual weld conditions, resulting in
higher weld currents
• Repeated starts can result in repeated
surge currents raising circuit breaker
threshold
Repeated Circuit breaker operation at weld
start can sometimes be overcome by using a
“D” curve circuit breaker.
To reduce nuisance tripping, a higher
rated circuit breaker can be selected, but
the supply circuit wiring capacity must be
increased to suit.
