Leroy-Somer — Checking the rectifier bridge
Testing & diagnosis · Three phase bridge
From a Leroy-Somer manual — check it applies to your exact model before use.
Procedure
- Identify terminals blue (B), yellow (J) and red (R).
- Check each diode for continuity in both directions.
- Replace the bridge if faulty.
Tools required
- Ohmmeter Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Source: Leroy-Somer 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.