CHAPTER 4: SETPOINTS PROTECTION
889 GENERATOR PROTECTION SYSTEM – INSTRUCTION MANUAL 4–125
Figure 4-42: Examples of differential/restraint trajectory during internal fault
Figure 4-43: Examples of differential/restraint trajectory during external fault
Path: Setpoints > Protection > Group 1 (6) > Generator > Overall Differential
FUNCTION
Range: Disabled, Trip, Configurable
Default: Disabled
The selection of the Trip, or Configurable setting enables the Percent Phase Differential
function. The trip output relays selected to trip each breaker will operate, if the Percent
Differential protection operates and these trip outputs are selected in the Percent
Differential menu as “Operate”.
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