Specifications

G13
GE Limitamp
®
Medium Voltage Motor Control
Components
G
Description
These Class 1 model GFM ground fault protection systems
are designed to minimize damage or loss to equipment
caused by destructive arcing ground faults. This GFM system
is designed for all polyphase applications and is ideally suited
for motor control, motor control centers and high-voltage
starters. Systems can be wye or delta, grounded or resistance
grounded. When the ground fault current exceeds a preselected
condition (current only, or current and time settings), the relay
trips. The relay contacts can be connected in the control circuit
of a motor starter, to the shunt trip of a circuit breaker or
similar disconnecting or alarm devices. The system has an
inverse time characteristic to prevent nuisance tripping. The
relay tripping current value is field adjustable over the trip
current range of the sensor. The adjustable trip time delay
relay, when specified, is field settable up to 36 cycles.
Features
• Main contact rated 30 amperes, 277 volts AC
• Auxiliary contacts rated 10 amperes continuous, 23 amperes
inrush, 120 volts AC
• Self powered
• Temperature range: -30° C to 75° C
• Positive “ON” (green) and “OFF” (red) condition indication,
manual reset
• Instantaneous only (GFM-353) standard
• Optional time delay from instantaneous to 36 cycles
(GFM-363)
Sensors
Model number Trip current Window size
GFM 250 3.5 to 11 2.5”
GFM 462 4 to 12 4.62”
Model GFM Ground Fault System
UL-listed File number E110395