WIA Weldmatic 256, Operator'S Manual

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10
Operators Manual
Quality
•
Reliability
•
Performance Quality
•
Reliability
•
Performance
5 Installation
Connection to Electrical Mains Power
Supply
NOTE . All electrical work shall only be
undertaken by a qualified electrician.
The Weldmatic 256 (480 V) is factory fitted
with a 3 metre, 3 core 30/0.25 Heavy Duty
PVC mains power supply cable.
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 for the Weldmatic 256 is
12 Amps.
To obtain full rated output current from the
Weldmatic 256, the 15 Amp flexible supply
cable must be fitted with a 3 pin plug that
is rated for greater than 15 Amps, and
connected to a correctly installed power outlet
of at least 15 Amps, 480 V supply capacity.
The minimum recommended mains circuit
breaker rating for a Weldmatic 256 is
15 Amps.
Note:
Due to normal variations
of sensitivity, the tripping time of some 15A
circuit breakers may limit the duty cycle
available from the Weldmatic 256. A higher
rated circuit breaker can be selected, but
the mains wiring capacity must be increased
to suit.
The current rating of the mains cable
depends on cable size and method of
installation. Refer to AS/NZS 3008.1, Table 9.
If it becomes necessary to replace the mains
flexible supply cable, use only cable with
correct current rating. Access to the supply
terminals is gained by removing the power
source side panels.
The replacement cable must be fitted and
retained in the same manner as the original.
Fig 4 Positive Wire
Output Voltage Polarity
The design of the Weldmatic 256 allows
selection of the output voltage polarity.
Positive Wire
G.M.A.W. with solid consumable wires is
carried out with the work piece Negative and
the welding wire Positive.
To setup for this condition, connect the
‘WORK’ lead plug into the (-) output socket
on the Power Source, and the ‘WELDING’
lead from the wirefeeder into the (+) socket
on the Power Source, as in Figure 4.
To wirefeeder
To work clamp