The control house of the substation has ________ that are used to control key equipment if power is lost to the station.

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Multiple Choice

The control house of the substation has ________ that are used to control key equipment if power is lost to the station.

Backup power for the control circuitry in a substation is provided by a bank of DC batteries located in the control house. These batteries supply DC power to relays, control panels, and other essential equipment when the station loses its normal AC power, so protective devices can still operate and alarms can be indicated. This immediate, stable power supports safe fault clearing and orderly operation until power is restored or a standby source comes online. Other options like AC generators would require starting and transfer gear, causing delays, and flywheels or solar cells aren’t used in this role for immediate, reliable control power.

Backup power for the control circuitry in a substation is provided by a bank of DC batteries located in the control house. These batteries supply DC power to relays, control panels, and other essential equipment when the station loses its normal AC power, so protective devices can still operate and alarms can be indicated. This immediate, stable power supports safe fault clearing and orderly operation until power is restored or a standby source comes online. Other options like AC generators would require starting and transfer gear, causing delays, and flywheels or solar cells aren’t used in this role for immediate, reliable control power.

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