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Earth Leakage & Ground Fault Relay RD

Earth Leakage & Ground Fault Relay RD

The Earth Leakage Relay RD is a microprocessor based protection device designed to recognize low level leakage currents.

RD allows preventive control of the system’s insulation with continuous displaying of the earth leakage current obtained by the use of a ring-type current transformer. Modbus communication is available.

  • Digital display of earth-leakage current in Ampere or in percentage of Trip level
  • Independent Current adjustments for alarm and tripping from 30 mA to 10 A
  • Independent Time adjustments for alarm and tripping, from 0.03 to 5 Sec.
  • 2 Output relays: TRIP and ALARM, “latch” or “pulse” mode
  • Service function (Alarm relay)
  • Indication and storage of the maximum fault current in a non-volatile memory
  • Local or automatic reset. The automatic reset is lockout after 3 automatic operations in a period of time less than 9 minutes
  • Remote Reset (RD-1 only)
  • Check of output relays and leds
  • Continuous control of CT wiring connection
  • High immunity to external disturbances and harmonic current components
  • Its function is also guaranteed with alternate sinusoidal and continually pulsing currents
  • Autoexplicative menù on the frontal

(64) Time and current selective ground current protection

TARD - Current Transformers Accessories for the RD family

MODEL MOUNTING TYPE DIMENSION
RD-1 DIN RAIL 71X90X58 MM
RD-7 PANEL MOUNTING 72X72X100 MM
RD-9 PANEL MOUNTING 96X96X100 MM

Brochure

Earth Leakage Current Transformer Brochure English 155.7 KiB
RD1-7-9 GB-ITBR 220107 536.1 KiB

 

Instruction Manual

RD GBM 12-02-2014 189.8 KiB
RD ITM 12-02-2014 186.7 KiB
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