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Maintenance
Vacuum Integrity Check
Refer to Circuit Breaker Operator Manual SGIM-9918.
High Potential Test
Refer to Circuit Breaker Operator Manual SGIM-9918.
Insulation and Contact Resistance Test
Refer to Circuit Breaker Operator Manual SGIM-9918.
Note: Maximum Contact Resistance is read from
primary bus stab to primary bus stab with primary
disconnects removed. A value of 13 micro-ohms
should be added to the maximum contact resistance
specified in the Circuit Breaker Operator Manual
SGIM-9918.
Figure 6. MOC-Saver System
Inspection and Cleaning of Circuit Breaker Insulation
Refer to Circuit Breaker Operator Manual SGIM-9918.
Racking Mechanism
Remove existing lubricant from racking mechanism. Apply
Beacon grease #325 (part # 15-337-131-001) to the slid-
ing, rotating and articulating surfaces. For inaccessible
surfaces, Anderol 732 aerosol synthetic fluid grease (part
# 15-172-816-058) may be used.
MOC- Saver System
Refer to Figure 6.
MOC-saver system shall be maintained and lubricated as
following:
1. Visually inspect to confirm that the velocity controller
is not leaking oil.
2. Verify velocity controller rod resistance. Remove
retaining pin, and verify rod resistance by pushing rod
"in" and "out". Re-assemble the velocity controller
assembly.
3. Check snubber assembly for visual damage (broken
clips and loose hardware).
Maintenance of the circuit breaker MOC - Saver system
DOES NOT mitigate the requirements to maintain cubicle
mounted MOC system components. These shall be main-
tained in accordance with IEEE C37.59 and the original
equipment manufacturer's recommendations.
Functional Tests
Refer to Circuit Breaker Operator Manual SGIM-9918.
Periodic Maintenance Intervals
Refer to Circuit Breaker Operator Manual SGIM-9918 and
Table 2.
Table 2 — Periodic Lubrication Interval
Item
Primary Disconnect
contact surfaces
Racking Mechanism
MOC- Saver System
Lubrication Interval
100 racking operations
or 10 years
1000 operations
or 10
years
9
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