Dale Power Solutions Ltd
Salter Road, Eastfield Industrial Estate, Scarborough, North Yorkshire, YO11 3DU, UK
[email protected] | www.dalepowersolutions.com |
+44 (0) 1723 583511
5. Switch on the UPS main breaker.
After a few seconds the Mains and Inverter LEDs are illuminated and the Bypass LED goes out (see
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on page
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).
Note:
If switching on into a transformer load, ensure the UPS is initially working in bypass mode
before switching to on-line mode.
6. If possible apply the load gradually.
Caution:
If the UPS input power is provided by a generator it is important to apply the load
gradually.
In this state your unit is working correctly and delivering power to the load. There is no need to alter any
settings.
Commissioning test procedure
Perform this test once the unit is operating normally.
1. Switch off the mains to simulate a utility failure. The rectifier should turn off and the battery should
feed the inverter without interruption. The battery, inverter and output indictors should be on.
2. Switch on the mains to simulate utility recovery, the rectifier should restart automatically after 10 s
and supply the load.
Switching off the UPS
Caution:
All power to the load will be removed when you follow this procedure.
To switch off the UPS:
1.
Switch off the battery breaker according to the manufacturer’s instructions.
2. Switch off the mains and bypass breakers. If the UPS has a dual mains supply, switch off both
supplies and lock them out.
Transferring the load to an EMBS
Transferring to an emergency backup supply (EMBS) is only possible if an external maintenance bypass
breaker has been wired into the system.
To transfer to an EMBS while maintaining the load:
1. Switch off the UPS inverter to put the unit into static bypass.
2. Switch on the external maintenance bypass breaker.
3. Switch off the UPS and battery as described above. The UPS is now off.
4. Perform the required maintenance work on the UPS.
5. After the maintenance work is complete, switch on the UPS as described above.
6. Switch off the external maintenance bypass breaker. The inverter should start automatically.
