5. Generator Capability

The rating of 375MW is applied to the generator at a power factor of 0.85, lagging. At lower power factors the 375MW rating does not apply. The limiting factor is then the maximum current rating of the generator, which is fixed irrespective of the power factor. The current corresponding to a load of 375MW is 12737A. 

Motoring

The generator will act as a synchronous motor if it is supplied with current from the system. Such operation is not harmful to the generator, but it could seriously damage the turbine if the steam flow were cut off.

Instrumentation is provided to monitor the direction of power flow in the generator, so that when taking a turbo-generator off load, the generator 220kV circuit breaker is manually tripped when the low-reading watt meter indicates zero load or a motoring condition.