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In a Switchgear, the job of the batteries include, but are not limited to: closing circuit breakers, energizing trip coils, providing lighting and power to protective relay and communications systems, as well as powering ventilation system motors and valve actuators. Most of the power supplied by batteries to Switchgear operations is intermittent. Generally the Switchgear carries little or no load until energizing the closing or tripping of the circuit breaker is needed.


Large switchgear systems such as those found in power plants, yard substations, and large commercial buildings, require the use of DC control circuits powered by lead acid batteries. Smaller Switchgear systems may utilize AC and occasionally a charged capacitor for closing power if reliability is not a great concern. In situations where reliability is paramount and electricity cost of using a DC battery system are secondary, an independent backup battery bank consisting of lead-acid batteries will provide control power to the entire switchgear system.

Lead Acid Switchgear batteries are usually found in one of two types:

  • Wet Cell
  • Sealed Lead Acid



  • Utilized in power plants, yard substations, and large commercial buildings
  • Can be wet cell or SLA type batteries
  • Found in 48, 125, or 250V bank systems
  • Require regular maintenance
  • Must be replaced every 3-5 years
  • Can be sold as scrap for money when batteries go bad



  • Power Plants, Factories, and large Commercial and Government Buildings
  • Switchgear Repair and Maintenance Companies
  • Technicians
  • Scrap Metal Recycling Yards