2.4 Combination with Earth Leakage Breaker
2-3
HW0480311
HW0480311
2.4
Combination with Earth Leakage Breaker
When the welding source is used in a construction site, in a place with high humidity, or on an
iron plate, iron framework, or surface plate with high conductivity, a leakage breaker should be
installed according to the proper regulations or laws. In such a case, connect a leakage
breaker of current sensitivity 30 mA for each welding source. The welding source may mal-
function because of the inverter operations depending on the model or current sensitivity of
the leakage breaker. Therefore, select a proper one for inverter drives.
2.5
Connection of Electrical System
1.
Connection on the Welding Source Side
See " Fig. 1 Connection Diagram of Welding Source at Rear Face " for proper connec-
tions.
1) Input cable
Please remove the top cover and connect the cable with the input terminal of
the partition board.
Connected bolt of the input voltage terminal is M8.
2) Ground cable
2.
Connection on the Welding Side
See " Fig. 2 Connection Diagram of Welding Source at Front Face " for proper connec-
tions.
1) Welding cable
The welding cable connects between the welding torch and power output termi-
*1
The input cable is passed from the hole for wiring in the back of the power supply.
When the outside diameter of the cable exceeds
φ
30.0mm, match the plate to the
size of the input cable, process the hole, and use it.
*2
Be sure to use cables for welding. Also, use cables with sufficient thickness for pulse
welding or current of 250 A or more. Excessively small gauge cables may result in
poor welding and cause abnormal heating resuoting in burn or fire.
• Open the disconnect switch of the swtichgear before connecting wires
between welding machine and primary power supply.
Even one imperfect contact in the connections precludes proper welding. Be sure to
make perfect connection to the base metal by using jigs.
NOTE
CAUTION
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