4 FAQs about Substation battery cabinet installation specifications

What is a substation battery system?

The primary role of the substation battery system is to provide a source of energy that is independent of the primary ac supply, so that in the event of the loss of the primary supply the substation control systems that require energy to operate can still do so safely.

Where should batteries be installed in a substation?

Batteries installed in unit substations, electrical equipment rooms and instrument rack rooms shall comply with the requirements of this section, Main Substation Design and Unit Substation Design. In these locations, stainless steel hoods vented to the outside shall be installed over batteries.

Does a substation have a dual battery system?

Substations with duplicated protection systems shall have dual (2) battery systems - one for each protection system. Substations that do not have remote back-up protection systems shall also have dual battery systems. Substations without duplicated protection systems, and which have remote back-up protection, shall have a single (1) battery system.

Why does a substation need a battery charger?

The battery is required to supply the DC electrical requirements of the substation, including SCADA, control, protection indication, communications and circuit breaker switching operations when there is no output from the battery charger. This may be due to a loss of AC supply to the substation or a fault in the battery charger.

View/Download Substation battery cabinet installation specifications [PDF]

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