Bender RCM420 Series Technical Bulletin
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Bender RCM420 Series Technical Bulletin

Digital ground fault monitor / ground fault relay grounded and high-resistance grounded ac systems
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4
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RCM420 Series
Digital Ground Fault Monitor / Ground Fault Relay
Grounded and High-Resistance Grounded AC Systems
Technical Bulletin
NAE1042031 / 08.2013

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Summary of Contents for Bender RCM420 Series

  • Page 1 RCM420 Series Digital Ground Fault Monitor / Ground Fault Relay Grounded and High-Resistance Grounded AC Systems Technical Bulletin NAE1042031 / 08.2013...
  • Page 2 BENDER Inc. • 700 Fox Chase, Coatesville PA 19320 • Ph: 800-356-4266 / 610-383-9200 • Fax: 610-383-7100 RCM420 Series Digital Ground Fault Monitor / Relay for Grounded AC Systems Description The RCM420 monitors for ground faults in grounded and high-resistance grounded AC systems, both single- and three-phase.

  • Page 3: Operating And Display Elements

    Operating and display elements Wiring diagram Load Power “ON” LED (green): Illuminates when power is received to the unit. Flashes when the current transformer connection alarm is active. Alarm LED “AL1” (yellow): Alarm 1, illuminates when the set res ponse value I has been exceeded.

  • Page 4: Technical Data

    Ground Fault Monitor RCM420 Technical data Inputs / outputs Insulation coordination acc. to IEC 60664-1 / IEC 60664-3 Rated insulation voltage 250 V Cable length for external test / reset button 0 - 32 ft (0 - 10 m) Rated impulse voltage / pollution degree 2.5 kV / III Switching elements Protective separation (reinforced insulation) between...

  • Page 5: Ordering Information

    Ordering Information Supply voltage Type Ordering No. Outputs 9.6 - 94 V 16 - 72 V (15 - 460 Hz) RCM420-D-1 B 9401 4001 2 SPDT contacts 70 - 300 V 70 - 300 V (15 - 460 Hz) RCM420-D-2 B 9401 4002 2 SPDT contacts Accessories...
  • Page 6 USA • Coatesville, PA Canada • Mississauga, ON Toll-Free: 800-356-4266 • Main: 610-383-9200 Toll-Free: 800-243-2438 • Main: 905-602-9990 Fax: 610-383-7100 • E-mail: info@bender.org Fax: 905-602-9960 • E-mail: info@bender-ca.com bender.org • bender.org/mobile...

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