GE D90 Plus - Battery Monitor; Indications and Wiring

CHAPTER 9: EQUIPMENT MANAGER BATTERY MONITOR
D90
PLUS
LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUAL 497
Figure 431: Breaker arcing current logic
Battery monitor
The battery monitor checks the health of the DC battery system. It provides an analog
indication of the current DC voltage derived from a contact input wired between the
positive and negative rails of the battery system. This signal is used to generate high and
low DC voltage alarms. This function also monitors and conditions the auxiliary alarm
contacts from the battery charger.
Indications and wiring
The following indications and alarms are provided for the battery monitor function.
Battery monitor alarms and indications
BATTERY VOLTAGE..............................Displays the present value of the battery voltage.
HIGH DC VOLTAGE.............................. Indicates the battery DC voltage is greater than the
maximum setting value.
LOW DC VOLTAGE............................... Indicates the battery DC voltage is less than the minimum
setting value.
SUPPLY FAIL..............................................Indicates the AC supply to the battery charger has failed.
CHARGER FAIL.......................................Indicates the battery charger has failed.
BREAKER TRIP........................................Indicates a DC distribution breaker has operated.
DC GND FLT..............................................Indicates a battery DC ground fault .
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