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  Products    Ground Fault Monitors for Grounded Systems    Current Transformers
Current Transformers
Current transformers are used in conjunction with the RCM series of units to monitor for ground faults in AC and/or DC grounded systems.

NEW! Need help selecting a current transformer? Our online CT selector can help.


Compare up to three products side by side:

W0-S15 ... W5-S210 Series (For Standard AC Systems)
Current transformers for use with RCM, RCMS, EDS series
The W0-S15 ... W5-S210 series of current transformers are highly sensitive devices for use with ground fault monitors in standard AC systems. A variety of sizes are available.

  • Available Models: W0-S15, W1-S35, W2-S70, W3-S105, W4-S140, W5-S210
  • Available Sizes: 15, 35, 70, 105, 140, 210 mm circular diameter
  • Compatible devices: Standard RCM series, RCMS series (When used to monitor standard AC systems)
                Datasheet


W Series (For Standard AC Systems)
Current transformers for use with RCM, RCMS, EDS series
The W series of current transformers are highly sensitive devices for use with ground fault monitors in standard AC systems. A variety of sizes are available.

  • Available models: W20, W35, W60, W120, W210
  • Available Sizes: 20, 35, 60, 120, 210 mm circular diameter
  • Compatible devices: Standard RCM series, RCMS series (When used to monitor standard AC systems)
                Datasheet


W..B Series (For AC, DC, and VFD-Driven Systems)
Current transformers for use with RCMA470/471LY
The WB series of current transformers are highly sensitive devices for use with ground fault monitors in AC and DC systems, as well as systems with variable frequency drives. A variety of sizes are available.

  • Available models: W35B, W60B, W120B, W210B
  • Available Sizes: 35, 60, 120, 210 mm circular diameter
  • Compatible devices: RCMA470LY (smallest two sizes), RCMA471LY (largest two sizes)
                Datasheet


W..AB Series (For AC, DC, and VFD-Driven Systems)
Current transformers for use with RCMA420, RCMS series
The WAB series of current transformers are highly sensitive devices for use with ground fault monitors in AC and DC systems, as well as systems with variable frequency drives. A variety of sizes are available.

  • Available models: W20AB, W35AB, W60AB, W120AB, W210AB
  • Available Sizes: 20, 35, 60, 120, 210 mm circular diameter
  • Compatible devices: RCMA420 (smallest three sizes), RCMS series
                Datasheet


WR Series (Rectangular CTs for Standard AC Systems)
Current transformers for use with RCM, RCMS, EDS series
The WR series of current transformers are highly sensitive devices for use with ground fault monitors in standard AC systems. These CTs have a large, rectangular interior for systems with large wiring or busbars (please refer to the datasheet for information on monitoring busbars). A variety of sizes are available.

  • Available Models: WR70x175, WR115x305
  • Available Sizes: 70x175, 105x305 mm rectangular interior
  • Compatible devices: Standard RCM series, RCMS series (When used to monitor standard AC systems)
                Datasheet


WS Series (Split-Core CTs for Standard AC Systems)
Current transformers for use with RCM, RCMS, EDS series
The WS series of current transformers are highly sensitive devices for use with ground fault monitors in standard AC systems where split-core current tranformers are required. These CTs allow for easy retrofitting into existing systems by opening via an interlocking knob. A variety of sizes are available.

  • Available Models: WS20x30, WS50x80, WS80x120
  • 20x30, 50x80, 80x120 rectangular interior (split-core type)
  • Compatible devices: Standard RCM series, RCMS series (When used to monitor standard AC systems)
                Datasheet


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