GE MULTILIN 269 MOTOR MANAGEMENT RELAY Series User Manual

3 SETUP AND USE
3-46
3.11 Ground Fault (Earth Leakage) Set-
points
Aging and thermal cycling can eventually cause a low-
ering of the dielectric strength of the insulation in the
stator winding. This can produce a low impedance
path from the supply to ground resulting in ground fault
currents which can be quite high in solidly grounded
systems. In resistance grounded systems there is a
resistance in series with the supply source to limit
ground fault current and allow the system to continue
operating for a short time under fault conditions. The
fault should be located and corrected as soon as pos-
sible, however, since a second fault on another phase
would result in a very high current flow. In addition to
damaging the motor, a ground fault can place the mo-
tor casing above ground potential thus presenting a
safety hazard to personnel.

GE MULTILIN 269 MOTOR MANAGEMENT RELAY Series Specifications

General

Brand	GE
Model	MULTILIN 269 MOTOR MANAGEMENT RELAY Series
Category	Relays
Language	English