Periodic Maintenance And Lubrication Tasks - Siemens SGIM-3268H Manual

Overhaul

Periodic Maintenance and Lubrication Tasks

S S u u b b - - A A s s s s e e m m b b l l y y
Primary Power Path
Interrupter Operator Mechanism
Electrical Controls
High Potential Test
Insulation
44
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I I t t e e m m
Vacuum Interrupter
Primary Disconnects
Vacuum Interrupter Contact
Resistance
Cleanliness
Fasteners
Manual Spring Check
Lubrication
Wiring
Terminals and Connectors
Close and Trip Solenoids, Anti-Pump
Relay, Auxiliary Switches,
Secondary Disconnect
Spring Charging Motor (88)
Primary Circuit to Ground and
between Primary Disconnects
Control Circuit to Ground
Barriers and all Insulating
Components
I I n n s s p p e e c c t t F F o o r r
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 locking
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
2. Close and trip with control power
1. Replace brushes after 10,000
operations
1. 60 second withstand, 14 or 27kV,
60 Hz (20 or 38kV DC) (depend-
ing upon voltage rating of breaker)
1. 60 second withstand, 1500V, 60 Hz
1. Cleanliness
2. Cracking