GE L90

CHAPTER 8: APPLICATION OF SETTINGS CURRENT DIFFERENTIAL (87L) SETTINGS
L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 8-7
8
Figure 8-4: Breaker-and-a-half application
2. The CTs and VTs are configured according to the following ratios and connections (EnerVista UR Setup example
shown).
3. The sources are configured as follows.
Source 1:
– First current source for current differential