Combination With Earth Leakage - YASKAWA YWE-EH500-6N0 Instruction Manual

2.4 Combination with Earth Leakage Breaker
*1
The input cable is passed from the hole for wiring in the back of the power supply.
NOTE
When the outside diameter of the cable exceeds φ30.0mm, 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.
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
• 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.
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-
CAUTION
2-3
HW0480311
HW0480311
20/129