GE SPM Series, Instruction Manual

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SPM Synchronous Motor Protection & Control GE Power Management
7.7 FREQUENTLY ASKED QUESTIONS 7 TESTING AND TROUBLESHOOTING
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7. Why do I get a long lockout time if my motor trips or fails to start?
The lockout time is variable. It is calculated to protect the motor from overheating and subsequent break-down
of the amortisseur winding. This heating is caused during motor acceleration. If the lockout time is too long it
can be decreased by selecting a higher RUNTIME curve setting or by setting a longer STALL TIME. Note: If
either of these changes are done make sure that you have not gone beyond the motor manufacturer's specifi-
cations. To avoid lockouts entirely, tripping or stopping the motor during or shortly after a start should be
avoided where possible.