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Dry switches

De-Energized Tap Changers


Specialty Transformer Components

Bladed or Snap Action Bridging De-Energized tap-changer for Air (73 - series)

Used for switching the tap positions on HV windings to adjust the voltage for Small Power transformers

  • 200 AMP to 600 AMP,
  • Up to 34.5 kV , 200 kV BIL
  • 5-7 position
  • Decks in series or parallel positions

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Selector Switches


Specialty Transformer Components

Bladed Common Center Air switches (70B series)

Used for switching position in Motor Test Equipment as well as used for Furness Transformers

  • 200 AMP to 2,000 AMP, (bridging up to 1600 Amp)
  • 600 volts to 1.2kV
  • Up to 12 positions
  • Single or three phase

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Specialty Transformer Components

Common Center or Disc Style Air switch (77B series)

Used for switching connections for variety different applications. Very Robust Design. Could be used for Furness Transformers with continues operations and frequent position changing.

  • 200AMP to 800 AMP
  • Up to 1.2kV
  • 2-8 position

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Specialty Transformer Components

Bladed Series Parallel (72 series)

Used in Dry type Transformers for changing the winding connections. Could be use for Furness transformers as well.

  • 600kV, to 34.5 kV
  • 200 Amps – 3000 Amps

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Network Switches


Specialty Transformer Components

Grounding Network Switches

Used on network transformers for disconnecting the primary feeder from the transformer and connecting incoming feeder to the ground

  • 95kV BIL,
  • Two (2) position (open/ground) or Three (3) position (open/closed/ground)
  • Side wall mount, with welded or bolted front plate
  • Single solenoids
  • Magnetic break assembly on closed contact
  • Phase sequence grounding

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Motor Operated Air Switches


Specialty Transformer Components

Motor Operated Air Switches (30B series)

Common Center or Bridging style, used for switching position in Testing equipment, distribution, air-core reactor - wind turbine etc

  • 200 to 6500 AMP,
  • 600 volts to 46kV
  • Up to 8 position.

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