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Residual Current Devices – RCDs

Residual Current Devices help protect people and equipment against electrical shocks caused by indirect contact. RCDs work together with Miniature Circuit Breakers (MCB) or fuses, covering the whole system against potentially damaging thermal and dynamic stresses of any overcurrent.


F200 series ground fault equipment protection (GFEPs) are available in multiple versions with 10, 30, 100, 300, and 500 mA ground-fault sensitivity. F200 GFEPs are also available in short-term delayed versions (AP-R types) as well as selective versions (S types). F200 GFEPs are A-type GFEPs and can detect AC as well as pulsed DC fault currents. AC-type devices detect AC fault currents only and are available upon request.

Types of RCDs

F200 AC: RCDs detect residual sinusoidal alternating currents at power frequency (50 or 60 Hz). Type AC RCDs are suitable for general use and cover linear loads (e.g., tungsten and halogen lighting, ovens and heaters without electronics control, etc.)

F200 A: RCDs, in addition to the detection characteristics of type AC RCDs, detect pulsating DC residual current. Such waveforms can be caused by diodes or thyristor-based single-phase rectifier circuits, common in modern electronic equipment (e.g., switching mode power supplies). Type A RCDs remain functional in the presence of a smooth direct current of up to 6 mA superimposed to a sinusoidal or pulsed DC earth current.

F200 A APR: Type APR is used to protect installations in Alternating Current and pulsating DC networks providing one of the best compromises between safety and continuity in the services as it helps ensure resistance to unwanted tripping. AP-R types are 12 times more resistant against nuisance tripping than regular GFEPs

F200 A S: Type S RCDs can introduce a time delay in the operation of the device. This delay is used in providing selectivity or coordination between residual current devices installed upstream from each other, to avoid unwanted tripping in the event of a residual current fault. Due to the internal time delay, Type S RCDs must not be used for people protection or have a sensitivity of 30 mA or less, and are generally rated with a sensitivity of 100 mA or higher.

F200 A 110V: These RCDs, function the same as normal F200 A type RCD. The only difference is that the performance function of a test button of this device for a customer is at 110V.


  • Easy to install - Terminals equipped with fail-safe features to avoid improper installation. A double slot for connection with cables and PS busbars. Possible to connect two independent cables in the same device
  • Contact position indicator (CPI) - To always know the status of the contacts independently on the toggle position. Red: closed contacts, green: open contacts
  • Test pushbutton - To verify the correct functioning of the device
  • Integration - Compatible with System pro M Compact accessories
  • Marking on the device - All the safety ensured by the international marks: approvals’ marking in a visible area, even if RCDs are installed and with the panel-door closed

Technical features

  • Rated Currents: 16A up to 100A
  • Rated I∆n Sensitivity: 10mA, 30mA, 100mA, 300mA, 500mA and 1A
  • Rated Voltage: 480Y/277 (up to 100 A)

Certifications and standards

  • UL 1053
  • IEC/EN 61008-1
  • IEC/EN 61008-2-1


  • Electrical vehicle chargers
  • Control panel builders
  • Semiconductor Industry
  • Medical machinery and laboratories
  • Marina and boatyards
  • Deicing systems