Page 161 - Practical Power System and Protective Relays Commissioning

Batteries Chapter | 15 161

FIGURE 15.2 Operating voltage range for battery charger settings for the charging of alkaline
batteries.

The boost charging means the commissioning charging mode at the
beginning of new battery operation. The floating charge is the charging of
the battery at normal service.

15.5 BATTERIES IN HIGH-VOLTAGE SUBSTATIONS

For a 400/220/132/33 kV substation, the specifications are:
The minimum ampere-hour ratings of battery for 400 kV switchyard of
400/220/132/33 kV substation and all 400 kV equipment shall be 300 Ah.
The voltage rating of an 300 Ah battery shall be 220 6 10% V.
For 220, 132, and 33 kV switchyard portion of 400/220/132/33 kV substation
and equipment, the minimum Amp-hour rating of battery shall be 400 Ah.
The voltage rating of a 400 Ah battery shall be 220 6 10% V.
The DC system shall consist of two battery chargers of 220 V, 300 Ah
for 400 kV and battery charger of 220 V, 400 Ah for 220/132/33 kV.
For 400 kV there shall be two sets of battery with an amp-hour rating of
300 Ah and for all other voltage classes, one battery set with a rating of
400 Ah.
For a 220/132/33 kV substation, the specifications are:
The minimum ampere-hour rating of battery shall be 300 Ah.
The voltage rating of a 300 Ah battery shall be 220 6 10% V.
Two battery chargers of 300 Ah shall be required.

For a 132/33 kV substation, the specifications are:
The minimum ampere-hour rating of battery shall be 200 Ah.
The voltage rating of 200 Ah battery shall be 220 6 10% V.
There shall be one battery charger of 200 Ah.