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Reliable plant emergency lighting is essential for personnel safety.
Maintenance or Test
Recommended Interval
Reference
Preventive maintenance
Per manufacturer's
recommendation
recommendation
Manufacturer's Instruction
Book
Book
Functional test
Monthly (30 seconds)
NFPA 101, Section 5.9.3
Functional test
Annually (1½ hours)
NFPA 101, Section 5.9.3
Exciters and voltage regulators comprise excitation systems which provide appropriate
DC excitation for the field of generators and synchronous motors. Excitation systems
may be rotating or static.
DC excitation for the field of generators and synchronous motors. Excitation systems
may be rotating or static.
Some components of excitation systems (e.g., transformers, circuit breakers, protective
relays, annunciators, and buswork) may require maintenance similar to that described
in like sections of this document. However, excitation system manufacturer
maintenance requirements supersede requirements specified in these sections.
relays, annunciators, and buswork) may require maintenance similar to that described
in like sections of this document. However, excitation system manufacturer
maintenance requirements supersede requirements specified in these sections.
Automatic voltage regulator performance testing ("alignment") is a specialty, requiring
specialized training and unique equipment as well as knowledge of current power
system stability requirements. It is recommended that qualified staff in the
Hydroelectric Research and Technical Services Group (D-8450) perform these tests.
specialized training and unique equipment as well as knowledge of current power
system stability requirements. It is recommended that qualified staff in the
Hydroelectric Research and Technical Services Group (D-8450) perform these tests.