22701-4 HIGH VOLTAGE GROUND MONITOR
24286 HIGH VOLTAGE GROUND MONITOR
The 22701-4 ground monitor is an impedance type ground
wire monitor designed to be used on high voltage
power circuits and connects to the pilot wire and ground wire of the power
circuit to monitor the resistance of the ground
circuit. The ground monitor requires 120 VAC control power for operation.
The ground monitor is designed to
be used with high voltage circuit breakers that have an undervoltage
release coil for tripping means and one set of form C
contacts are provided.
The ground monitor has a light to
indicate that a trip condition has occurred and must be manually reset
with the pushbuttom provided.
The ground monitor has the following
additional features:
A phase switch to prevent
nuisance tripping on high current demands of the power system.
A monitor test pushbutton to be
used for testing and calibration of the ground monitor.
A toggle switch to select the
resistance ohm range of the pilot wire and ground wire loop circuit. The
toggle switch can select a range
of 0 - 6 ohms or
6 – 20 ohms of resistance.
A pilot current ammeter and a
potentiometer for calibration purposes.
A light for indication that the
ground monitor caused the high voltage circuit breaker to trip.
The 24286 ground monitor is an impedance type ground wire monitor designed to be used on high voltage power circuits and connects to the pilot wire and ground wire of the power circuit to monitor the resistance of the ground circuit. The ground monitor requires 120 VAC control power for operation.
The ground monitor is designed to be used with high voltage circuit breakers that have an undervoltage release coil or a shunt trip coil for tripping means and two sets of form C contacts are provided.
The high voltage ground monitor has two modes of operation, UVR and NON-UVR . The UVR mode is used with high voltage circuit breakers with only undervoltage release coils. The NON-UVR mode is used with high voltage circuit breakers that only have a shunt trip. The ground monitor has an internal timer to prevent tripping the high voltage circuit breaker on power up situations.
The ground monitor is self resetting after a trip condition occurs or by disconnecting a jumper between two terminals, it is necessary to manually reset the ground monitor after a tripping.
The ground monitor has the following additional features:
A phase switch to prevent nuisance tripping on high current demands of the power system.
A monitor test pushbutton to be used for testing and
calibration of the ground monitor.
A pilot current ammeter and two potentiometers for calibration purposes.
A mechanical trip target for indication that the ground monitor caused the high voltage circuit breaker to trip.
Lights to indicate the mode of operation.