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Oil switches

De-Energized Tap Changers


Specialty Transformer Components

Half Moon Bridging Tap Changer (40B)

Used for switching the tap positions on windings to adjust the voltage for Large Distribution Transformers

  • 1150kV BIL, 150 kV BIL, 200 kV BIL & 250 kV BIL
  • Five (5) position
  • 200, 400, 600, 700, 800 AMPs.
  • Bolt threaded studs
  • With standard or Flexible Universal joint
  • With T handle and index plate

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Specialty Transformer Components

Snap Action Rotary Bridging Tap Changer (41C)

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

  • 110, 150, 200, 250kV BIL, up to 350 kV BIL
  • Five (5) or Seven (7) position
  • 200, 400, 600, 700, 800 and 1000 AMPs.
  • With standard or Flexible Universal joint
  • With T handle and index plate
  • Bolt threaded studs

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Specialty Transformer Components

Bridging Ring Style Tap Changer (42B)

Used as the tap changer to adjust the voltage of distribution transformers

  • 125 and 200 AMP
  • Wall mount and right angle drive
  • Five (5) and Seven (7) position
  • One(1), two(2), three(3) and six(6) decks
  • 15kV / 110 kV BIL or 46 kV / 250 kV BIL
  • Wrench operator or T handle

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Specialty Transformer Components

Snap Action Rotary Bridging Tap Changer (44B)

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

  • 450 kV BIL, 550 kV BIL, up to 750 kV BIL
  • Five (5) or Seven (7) position
  • 200, 400 or 600 AMPs.
  • With standard or Flexible Universal joint
  • With T handle and index plate
  • Crimped studs

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Specialty Transformer Components

Linear Type Bridging Style Tap Changer (45L)

Used for switching the tap positions on windings to adjust the voltage for Large Distribution & Small Power Transformers.

  • From 110, up to 350 kV BIL
  • Five (5) or Seven (7) position
  • 200, 400, or 600 AMPs.
  • With Geneva mechanism.

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Specialty Transformer Components

Linear Type Bridging Style Tap Changer (46L)

Used for switching the tap positions on windings to adjust the voltage for Large Distribution & Small Power Transformers.

  • From 450, up to 900 kV BIL
  • Five (5) or Seven (7) position
  • 200, 400, or 600 AMPs, per deck
  • With Geneva mechanism.
  • One, Two or Three column
  • Single or double deck per phase

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Specialty Transformer Components

Linear Type Series Parallel (22L)

Used in Small and Medium Power Transformers for connecting portion of windings (usually HV Windings) in series or parallel connection to change transformer ratio.

  • 95kV BIL, 125, kV BIL, and 200 kV BIL up to 250 kV BIL
  • Two (2) position (series/parallel)
  • One (1) to Three (3) columns phases

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Special Switches


Specialty Transformer Components

Series Parallel (22B)

Used in Small and Medium Power Transformers for connecting windings (usually HV) in series or parallel connection to change transformer ratio.

  • 125, kV BIL, and 150 kV BIL up to 200 kV BIL
  • 500 AMPs
  • Two (2) position (series/parallel)
  • One (1) to Three (3) phases

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Specialty Transformer Components

Delta Wye (26B)

Used in Small and Medium Power Transformers for connecting windings in Delta or WYE connection to change transformer ratio.

  • 125, kV BIL, and 150 kV BIL
  • 500 Amps to 2000 Amps
  • Two (2) position
  • 36 deg. or 72 deg. rotation
  • T-handle with pad lock or pull to turn.

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Specialty Transformer Components

Dual Voltage (24B)

  • 150 kV BIL or 200 kV BIL
  • 500 Amp to 850 Amps , (per deck)
  • Two (2) position Three (3) phase (3, 6 or 9 decks)
  • Side wall mount with right angle gearbox.
  • With Universal Joint, Gear Box
  • 36 or 72 degree rotation

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Specialty Transformer Components

Bladed – Bridging & Common Center (43B)

  • 30 – 200 kV BIL
  • 500 to 2000 manually operated or
  • up to 6000 motor operated
  • 2 to 13 positions

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Network Switches


Specialty Transformer Components

Grounding Network Switches (50B or 52B)

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

  • 95kV BIL, 125, kV BIL, and 200 kV BIL
  • Two (2) position (open/ground) or Three (3) position (open/closed/ground)
  • Side wall mount, with welded or bolted front plate.
  • Single or Double solenoids.
  • Magnetic break assembly on closed contact,
  • Phase sequence grounding.

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Motor Operated Oil Switches


Specialty Transformer Components

Motor operated Oil switches (34B series)

Used as the tap-changers to adjust the voltage on LV windings

  • 200 to 4500 AMP,
  • 600 volts to 46kV
  • Standard up to 8 position
  • Up to 6 decks

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