CHAPTER 7 GENERATOR PROTECTION

                                                             

7.1       GENERAL

Electrical plant can be damaged, or destroyed, by operation outside its designed ratings or by fault conditions caused by a breakdown of some part of the system.

The automatic protection of electrical installations, including generators, against such damage is described fully in the manual ‘Electrical Protection’.

In brief, generators are protected against some or all of the following abnormal conditions:

·                     Overcurrent

·                     Earth fault

·                     Differential current

·                     Reverse power

·                     Overvoltage

·                     Undervoltage

·                     Underfrequency

·                     Field failure

·                     Diode failure

·                     Winding overtemperature

·                     Turbine trip

Overspeed.