Briggs & Stratton — Testing the Automatic Transfer Switch
Testing & diagnosis
From a Briggs & Stratton service manual — check it applies to your exact model before use.
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Procedure
- Turn the main distribution panel circuit breaker feeding the transfer switch to the OFF position
- Observe system's automatic sequence initiation
- To return to utility power, turn the main distribution panel circuit breaker to the ON position
Specs & values
- Utility Fail: Generator senses utility voltage below 70% of nominal; engine start sequence initiates after 6 second time delay
- Engine Warm-Up: Select 20 or 50 second delay using jumper on control board
- Transfer: Occurs after voltage exceeds set levels; minimum 5 minute engine run time after transfer
- Engine Cool Down: Engine runs 60 seconds after retransfer
Source: Briggs & Stratton 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.