switchgear equipment preventive maintenance check off list.

1.

Disconnect primary power from switchgear. 


2. 

Disconnect control power except for Items 9, 10, and 19. 


3. 

Check exterior of equipment for damage.

 
4. 

Check equipment ground bus and its 
connection(s) to station ground. 


5. 

On outdoor switchgear, check integrity of seal against weather and rodents. 


6. 

Check doors for damage. 


7. 

Check door handles, locking bars, keys and 
interlocks for positive operation. 


8. 

Insure structure is tight.

 
9. 

Check cabinet lighting (if present).

 
10. 

Check heaters and heater circuits (if present). 


11. 

Check that all power and control cable 
entrances are sealed against rodents and fire contaminants. 


12. 

Check all wiring connections, including those on terminal blocks. 


13. 

Check draw-out racking mechanisms (also 
check lubrication). 


14. 

Check shutter mechanism.


15. 

Inspect bus and support insulators for 

evidence of corona or insulation deterioration 


16. 

Megohmmeter test switchgear 

lightning arresters (if present). 


17. 

Check control knobs and switches for freedom of movement and contact condition. 


18. 

Check mechanical and electrical integrity of all relays 


19. 

Perform sequencing check of 

protective, auxiliary, and control 

relays.

 

20. 

Inspect switchgear instruments 

(meters, switches, and indicating 

lights). 


21. 

Inspect all instrument transformers. 


22. 

Inspect all fuses. 


23. 

Inspect and check batteries and battery 

charging equipment (perform a load test). 


24. 

Clean all compartments and bus sections.

 

25. 

Lubricate racking mechanism, if not done 

under Item 13. 


26. 

Check to insure that all key interlocks are 

operational and no spare keys are used.