Combination With Leakage Breaker; Connection Of Electric System - YASKAWA MOTOWELD-T300D Instructions Manual

4.3 Combination with Leakage Breaker

When the welder 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 law. In such a case, connect a leakage breaker of current
sensitivity 30 mA for each welder. The welder may malfunction because of the inverter
operations depending on the model or current sensitivity of the leakage breaker.
Therefore, select a proper one for inverter drives.

4.4 Connection of Electric System

Even one imperfect contact in the connections precludes proper welding.
make a perfect connection to the base metal by using jigs.
17
Be sure to