Leroy-Somer — Connection checks
Installation · Terminal box / installation
From a Leroy-Somer service manual — check it applies to your exact model before use.
Before you start
- The connections inside the terminal box must never be subjected to stress due to cables connected by the user.
Procedure
- Check the residual circuit-breaker conforms to legislation and is correctly installed on the alternator power output, as close as possible to the alternator.
- Check any protection devices in place have not been tripped.
- If there is an external AVR, check the connections between the alternator and the cabinet follow the connection diagram.
- Check there is no short-circuit phase-phase or phase-neutral.
- Check the machine is connected with the busbar separating the terminals as shown in the terminal connection diagram.
- Check the alternator earth terminal inside the terminal box is connected to the electrical earth circuit.
- Check the earth terminal is connected to the frame.
Source: Leroy-Somer service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.