Periodic Maintenance And Lubrication Tasks - Siemens SDV-4A Instruction Manual

Overhaul

Periodic Maintenance and Lubrication Tasks

Sub-Assembly
Primary Power Path
Interrupter Operator
Mechanism
Electrical Controls
High Potential Test
Insulation
Item
Vacuum Interrupter
Cleanliness
Fasteners
Manual Spring Check
Lubrication
Wiring
Terminals and Connectors
Close and Trip Solenoids,
Anti-Pump Relay,
Auxiliary Switches
Spring Charging Motor (88)
Primary Circuit to Ground
Control Circuit to Ground
Vacuum Interrupter Contact
Resistance
Barriers and all Insulating
Components
Inspect For
1. Cleanliness
2. Contact erosion
Note: Perform with
Manual Spring Checks
3. Vacuum integrity
Note: Perform with
High Potential Tests
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, 37.5 or
45kV, 60 Hz (53 or 63.6kV DC)
(depending upon voltage rating
of breaker - refer to Table 4)
1. 60 second withstand,
1125V, 60 Hz
1. Record contact resistance with
contacts closed, and recheck
each maintenance interval to
monitor condition
1. Cleanliness
2. Cracking
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