Siemens 5-GMI-350 - Page 40

Maintenance
&
Overhaul
Page
37
Annual
Inspection
Tasks
Sub
-
Assembly
Item
Inspect
For
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
1
.
Record
contact
resistance
with
contacts
closed
,
and
re
-
check
each
year
to
monitor condition
.
Primary
power
path
Vacuum
interrupter
Primary
disconnects
Vacuum
interrupter
contact
resis
-
tance
Interrupter
operator
mechanism
Cleanliness
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
Fasteners
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
) (
depending
upon
voltage
rating
of
breaker
)
1
.
60
second withstand
,
1125
V
,
60
Hz
Spring
charging
motor
(
88
)
High
Potential Test
Primary
circuit
to
ground
and
be
-
tween
primary
disconnects
Control
circuit
to
ground
Barriers and all
insulating
com
-
ponents
Insulation
1
.
Cleanliness
2
.
Cracking
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