Breaker Flashover - GE D90 Plus Instruction Manual

CONTROL ELEMENTS

Breaker flashover

372
Figure 311: Breaker configuration logic, sheet 4 of 4
The detection of breaker flashover is based on the following condition:
1. Breaker open
2. Voltage drop measured from either side of the breaker during the flashover period
3. Voltage difference drop
4. Measured flashover current through the breaker
Furthermore, the breaker flashover scheme is applicable for cases where either one or two
sets of three-phase voltages are available across the breaker.
PLUS
D90 LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 7: PROTECTION