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C4328-000 Combination Continuity Ground Monitor/Ground Fault Relay
Ground Monitors

C4328-000 Combination Continuity Ground Monitor/Ground Fault Relay

This is a low voltage continuity ground monitor/ground fault assembly combining the SMC Model C-3013-1 Continuity Ground Monitor (MSHA BTS Acceptance No. 101679 PDP) with a SMC Model B-2111-8, zero sequence type, Ground Trip System.
1) The ground monitor portion of the combination relay will monitor the integrity of the pilot/ground circuit. The GM relay will trip should the pilot/ground circuit be interrupted for any reason and is not dependent on impedance increases. The monitor will not drop out during a 25 percent voltage dip with 5 ohms in the pilot ground loop and will ride through a power outage for ¼ second with ½ ohm in the loop.
2) The ground fault portion of the combination relay will
monitor ground fault current, tripping the circuit breaker if the ground fault currents increase to an unacceptable level. It is adaptable for use with shunt trip or under-voltage devices.
An onboard selector switch provides flexibility to use most existing current transformers.
This combination monitor provides assurance of safely grounded electrical equipment and protection to personnel. This combination design is an excellent choice for larger motor loads.
The Ground Trip Relay is designed for use with 120 VAC undervoltage or shunt trip breakers on circuits
limited to 25 amps or less ground fault current. It is factory adjusted to trip at less than 6 amps ground fault through a current transformer. This relay uses a breaker for tripping and indication. When a ground fault current occurs, the breaker trips and must be manually reset.

  • Internal CT selector switch allows field selection to virtually work with any other CT
  • Input 120VAC @ 60Hz (4va Typ; 25va Max)
  • Front panel mounting
  • Polarity switch and indicating light
  • Trip indications
  • Monitor test button
  • Up to 15V at 2A can be induced continuously in the pilot/ground loop without damage
  • No adjustments to make.
  • The grounding reactor permits the monitor to distinguish between the ground wire and parallel paths. A benefit of this design is blocking of inter-machine voltages up to 10V at 1A
  • Power on light
  • Current Transformer (CT) selection switch
  • Shunt Trip (ST) or Under-voltage (UV) application (Factory wired for UV Operation)
  • Input voltage 120 VAC Trips at less than 6 amps Trip indication
  • Manual reset
MSHA Certificate

Product certificates

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MSHA Certificate
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C4328-000 Combination Continuity Ground Monitor Ground Fault Relay: Product inquiry

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