5-164 B90 LOW IMPEDANCE BUS DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL
GROUPED ELEMENTS CHAPTER 5: SETTINGS
5
BF1 AMP LOSET PICKUP — This setting is used to set the phase current fault detection level. Generally this setting detects the
lowest expected fault current on the protected breaker, after a breaker opening resistor is inserted approximately 90% of
resistor current).
Figure 5-86: Breaker failure current supervision logic
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