CMMS Maintenance Software Resources - Maintenance-Scheduling-Electrical-Equipment-28 Page 28

9.6 Medium and High Voltage SF6 Breaker Maintenance Schedule

Maintenance or Test

Recommended Interval

Reference

Review equipment ratings

5 years

NERC Planning Standard

Preventive maintenance

Per Manufacturer's
Instruction Book

Manufacturer's Instruction
Book

Record gas pressure and
temperature, compare with
tolerances

Biweekly

Manufacturer's Instruction
Books

Record operations counter

Biweekly

Manufacturer's Instruction
Books

Visual inspection

Biweekly, annually, 5 years

Manufacturer's Instruction
Books

Check foundation, grounds,
paint

5 years

Manufacturer's Instruction
Books
WAPA Standard
Maintenance Guidelines,
Chapter 13

Check external screws, bolts,
electrical terminals tight

Annually Manufacturer's Instruction

Books

Contact resistance test, power
factor insulation test, motion
analyzer, trip test, moisture test
on gas

5 years

WAPA Standard
Maintenance Guidelines,
Chapter 13

Verify operation and calibration
of temperature and pressure
switches and gages

5 years

WAPA Standard
Maintenance Guidelines,
Chapter 13

Check oil levels; carbon brush
condition; heater operation,
tightness of terminals, linkages,
screws, bolts; latch, linkage,
operating mechanism
adjustments

5 years

Manufacturer's Instruction
Books

Overhaul breaker with new
seals, contacts, nozzles

10 to 15 years or 4,000 to
10,000 operations (more
frequent if high current
operation)

Manufacturer's Instruction
Books

Overhaul disconnect, grounding,
and breaking switches

15 years or 5,000 to
10,000 operations

Manufacturer's Instruction
Books