Home - Products Information - Contact Us
Ground Monitor
Ground Fault System
Capacitor Trip
 |
21927 GROUND MONITOR The 21927 ground monitor is an impedance type, MSHA approved
ground wire monitor designed to be used on a low voltage circuit and
connects
to the pilot wire and ground wire of the power circuit to monitor the
resistance of the ground circuit. The monitor has the following features: A light to indicate that the ground wire is not satisfactory and the ground monitor is tripped |
|
25646-1 GROUND FAULT SYSTEMS The 25646-1 ground fault assembly provides ground fault protection for 15 amp and 25 amp resistance ground power systems. The assembly provides the protection by tripping the undervoltage release coil or the shunt trip coil of the circuit breaker of the power circuit which can range from 480VAC to 995 VAC. The assembly requires 120 VAC control power for operation. The assembly detects a ground fault condition with the use of a zero sequence CT core that has all three phases of the power circuit passing through it. The CT core has a test winding to allow simulation of a ground fault condition for testing purposes. The ground fault test is performed with a test pushbutton located on the front of the assembly.The ground fault assembly has a mechanical trip target for indication that the assembly tripped due to a ground fault and must be manually reset. |
|
|
|
22707-1 CAPACITOR TRIP ASSEMBLY The 22707-1 capacitor trip assembly provides DC tripping power for high voltage circuit breakers. The capacitor trip assembly requires 120 VAC input power.The output of the capacitor trip assembly is 175 VDC. This DC output can also be used to power the solid state overcurrent relays that detect a fault condition. The capacitor trip assembly has a light that indicates that it has a charge and is ready to supply trip control power. |
|
25593-1 GROUND MONITOR - GROUND FAULT ASSEMBLY |
|
|
The 25593-1
ground monitor is an impedance type, MSHA approved ground wire monitor designed
to be used on low 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 assembly provides ground monitor and ground fault protection
for 15 amp and 25 amp resistance grounded power systems by tripping the
undervoltage release coil on the circuit breaker of the power circuit which can
range in voltage from 480 VAC to 995 VAC. The assembly requires 120 VAC control
power for operation.
The unit detects a ground fault condition with the use of a zero
sequence CT core that has all three phases of the power circuit passing through
it. The CT core has a test winding to allow simulation of a ground fault
condition for testing purposes. The ground fault test is performed with a test
pushbutton located on the front of the unit.
The unit has the following additional features:
A phase switch to prevent nuisance tripping on high current demands
of the power system.
A ground monitor test pushbutton to be used for testing and
calibration of the ground monitor.
A potentiometer to be used for calibration of the monitor.
A light to indicate that the ground wire circuit is satisfactory.
A mechanical trip target and light for indication purposes that the
unit tripped due to a ground fault occurring. The mechanical trip target must be
manually reset after a ground fault trip occurs.
A ground fault test pushbutton to simulate a ground fault condition
for test purposes.
