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  Products    Ground Fault Monitors for Grounded Systems    RCMA series
RCMA series
The RCMA series monitors for faults on grounded and high-resistance grounded systems running on AC, pulsed DC, or pure/rectified DC (IEC 60755 Type B) power, including systems with variable frequency drives.

Compare up to three products side by side:

RCMA470LY
Ground fault monitor for grounded AC/DC systems
The RCMA470LY monitors for ground fault leakage current in grounded & high-resistance grounded single & three-phase AC, pulsed DC, and pure DC type systems (Type B). Features include two seperately adjustable setpoints from 30mA...3mA for the main alarm and 50% of the set value for the pre-alarm, LED meter display (0-100%), adjustable time delay from 0...1 s for the pre-alarm and 0...10sec for the main alarm, fault storage, 2 DPDT alarm relays which can be set for normally energized and normally de-energized operation. An external BENDER current transformer is required for operation.

The RCMA470LY has a lower starting setpoint range than the RCMA471LY, and uses smaller current transformers.

  Also required: Current transformer from the WB series. Datasheet
  Use our CT Selector to find the correct and optimal CT for your system.

 Technical Specs                 Datasheet


RCMA475LY
Ground fault monitor for grounded AC/DC systems with internal CT
The RCMA475LY monitors for ground fault leakage current in grounded & high-resistance grounded single & three-phase AC, pulsed DC, and pure DC type systems (Type B). Features include two seperately adjustable setpoints from 30mA...500mA for the main alarm and 50% of the set value for the pre-alarm, LED meter display (0-100%), adjustable time delay from 0...1 s for the pre-alarm and 0...10sec for the main alarm, fault storage, 2 DPDT alarm relays which can be set for normally energized and normally de-energized operation. Includes a built-in 18mm current transformer.

  Unit uses internal current transformer; external CT not required.

 Technical Specs                 Datasheet


RCMA420
Digital ground fault monitor for grounded AC/DC systems
The RCMA420 monitors for ground fault leakage current in grounded and high-resistance grounded single- and three-phase AC, pulsed DC, and pure DC systems (Type B). Features include adjustable setpoint from 10ma...10A, LCD display, adjustable time delay, fault storage, 2 SPDT alarm relays which can be set for normally energized and normally de-energized operation. An external BENDER current transformer is required for operation.

  Also required: Current transformer from the WAB series. Datasheet
  Use our CT Selector to find the correct and optimal CT for your system.

 Technical Specs                 Datasheet


RCMA471LY
Ground fault monitor for grounded AC/DC systems
The RCMA471LY monitors for ground fault leakage current in grounded & high-resistance grounded single & three-phase AC, pulsed DC, and pure DC type systems (Type B). Features include two seperately adjustable setpoints from 100mA...3mA for the main alarm and 50% of the set value for the pre-alarm, LED meter display (0-100%), adjustable time delay from 0...1 s for the pre-alarm and 0...10sec for the main alarm, fault storage, 2 DPDT alarm relays which can be set for normally energized and normally de-energized operation. An external BENDER current transformer is required for operation.

The RCMA471LY has a higher starting setpoint range than the RCMA470LY, but can use larger sized current transformers.

  Also required: Current transformer from the WB series. Datasheet
  Use our CT Selector to find the correct and optimal CT for your system.

 Technical Specs                 Datasheet


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