Perform scheduled field maintenance of UPS systems. Testing and inspections will be performed in accordance with manufacturers' instructions and service manuals, ANSI/IEEE standards and Full Fill recommended standard maintenance guidelines for UPS systems. |
Inspect UPS system for physical damage. |
- Compare equipment nameplate information and connections with single line diagram and report any discrepancies.
- Check tightness of all control and power connections.
- Perform transfer operation.
- Measure contact resistance in normal and alternate source position.
- Set and calibrate in accordance with manufacturer's literature.
- simulating loss of normal power
- loss of emergency power
- return of emergency power
- return of normal power
- SCRs for correct operation
- Battery for correct voltage
- Monitor and verify correct operation and timing of all relays
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