Siemens GMI Series

Overhaul
Periodic
Maintenance
and
Lubrication
Tasks
Inspect
For
Item
Sub
-
Assembly
1
.
Cleanliness
2
.
Contact
erosion
Note
:
Perform
with
Manual
Spring
Checks
3
.
Vacuum
integrity
Note
:
Perform
with
High
Potential
Tests
1
.
Burnt
or
damaged
fingers
2
.
Lubrication
of
contact
surfaces
1
.
Record
contact
resistance
with
contacts
closed
,
and
re
-
check
each
year
to
monitor
condition
.
1
.
Dirt
or
foreign
material
1
.
Tightness
of
nuts
and other
lock
-
ing
devices
1
.
Smooth
operation
of
manual
charging
,
and
manual
closing
and
tripping
.
1
.
Evidence
of
excessive
wear
2
.
Lubrication
of
wear
points
1
.
Mechanical
damage
or
abrasion
1
.
Tightness
and absence
of
mechanical
damage
1
.
Automatic
charging
Vacuum
Interrupter
Primary
Power
Path
Primary
Disconnects
Vacuum
Interrupter
Contact
Resistance
Cleanliness
Fasteners
Interrupter
Operator
Mechanism
Manual
Spring
Check
Lubrication
Electrical
Controls
Wiring
Terminals and
Connectors
Close
and
Trip
Solenoids
,
Anti
-
Pump
Relay
,
Auxiliary
Switches
,
Secondary
Disconnect
2
.
Close
and
trip
with
control
power
1
.
Replace
brushes
after
10
,
000
operations
1
.
60
second withstand
,
14
or
27
kV
,
60
Hz
(
20
or
38
kV
DC
)
(
depend
-
ing
upon
voltage rating
of
breaker
)
1
.
60
second withstand
,
1500
V
,
60
Hz
1
.
Cleanliness
Spring Charging
Motor
(
88
Primary
Circuit
to
Ground
and
be
-
tween
Primary
Disconnects
High
Potential Test
Control
Circuit
to
Ground
Barriers
and
all
Insulating
Com
-
ponents
Insulation
2
.
Cracking
36
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