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Generator field flashing is required when generator voltage does not build up and the generating system (including the voltage regulator) does not have fieldflash capability. This condition is usually caused by insufficient residual magnetism in the exciter and generator fields. In some cases, a generator that has been out-of-service for an extended period may lose its residual magnetism and require flashing. Residual magnetism can be restored by flashing the field thereby causing a current surge in the generator. Refer to the voltage regulator manufacturer’s literature for procedural instructions.

Solid-state or semiconductor components may be included in the voltage regulator. Perform field flashing according to the manufacturer’s instructions to avoid equipment damage.

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