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Maintenance and troubleshooting
Table 6: Periodic maintenance and lubrication tasks
Sub-assembly
Item
Inspect for
Primary power path | Vacuum interrupter | 1. | Cleanliness. |
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| 2. | Contact erosion. Note: Perform with |
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| 3. | Vacuum integrity. Note: Perform with |
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| Primary disconnects | 1. | Burnt or damaged fingers. |
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| 2. | Lubrication of contact surfaces. |
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| Vacuum interrupter contact resistance | 1. | Record contact resistance with contacts |
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| CLOSED and check at each maintenance |
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| interval to monitor condition. |
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Vacuum interrupter operator mechanism | Cleanliness | 1. | Dirt or foreign material. |
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| Fasteners | 1. | Tightness of nuts and other locking |
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| devices. |
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| 1. | Smooth operation of manual charging, | |
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| manual closing and manual tripping. |
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| Lubrication | 1. | Evidence of excessive wear. |
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| 2. | Lubricaion of wear points. |
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Electrical controls | Wiring | 1. | Mechanical damage or abrasion. |
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| Terminals and connectors | 1. | Tightness and absence of mechanical |
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| damage. |
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| Close and trip solenoids, | 1. | Automatic charging. |
| auxiliary switches and secondary | 2. | Close and trip with control power. |
| disconnect | ||
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Primary | 1. | ||
| primary disconnects |
| (85 kV dc). |
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| Control | 1. | |
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Insulation | Barrier and all insulating components | 1. | Cleanliness. |
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| 2. | Cracking, crazing, tracking or other sign |
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| of deterioration. |
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