Maintenance; High-Potential Test - GE Multilin 350 Operation & Maintenance Manual

Proper maintenance of the Manual Ground and Test
Device is necessary to insure satisfactory operation.
The following items should be checked each time the
device is used.
1. Make certain all
connections are tightly connected.
2. Contact surfaces of primary disconnect fingers
and Ground shoe should be lightly coated with
0282A2048P009 compound.
3. The Compartment Elevation Interlock assembly
should operate freely when actuated by selection
If the Manual Ground and Test Device has been stored
a long period of time or exposed to high humidity
conditions, it is recommended that the insulation be
checked before it is placed in service. A standard 60Hz
high potential test at 27kV rms will normally indicate
whether the device is satisfactory for service. Apply

MAINTENANCE

8.
primary and grounding
9.
lever. Lubricate
0282A2048P009 compound.
4. Make certain insulation parts are free of dust and
contaminants.
5. "X" retaining rings are used on retaining pins in
the indicating linkage. These rings can be installed and
removed with pair of pliers. When they are installed
on a pin there should be a maximum gap of 1/16 inch
between the ears. Reuse of "X" rings is not
recommended.
HIGH–POTENTIAL TEST
the voltage to each phase individually for one minute
with two other phases and frame Grounded. After the
high potential test is made, inspect the primary stud
support for leakage paths. Clean surfaces and retest if
leakage paths are visible, or replace the support.
8
the rubbing surfaces with