UPS offline PM activity procedure – Datacenter

UPS offline PM activity procedure – Datacenter

1. Before the UPS offline PM activity, it’s essential to verify that all dual-source devices are connected to the appropriate RPDU. One cable should connect to the left-side RPDU, and the other cable should connect to the right-side RPDU and ensure that single source device is connected to the STS.

2. Please ensure that thermography is performed on all terminals for UOP and PDU.

3. The OEM team will verify both UPS parameters.

4. We plan to switch off the A source MCBs individually at the PDU end, and the NOC team will verify that all devices are powered on from B source.

5. After turning off all racks in Source A, make sure that the load is transferred to Source B.

6. Please ensure that all the racks are powered on using the B power source.

7. Then turn off the output and input breaker at the PDU end and apply the LOTO.

8. Please turn off the PDU input breaker at the UOP end and apply the LOTO.

9. After completely switching off, we will provide the OEM with confirmation of the UPS offline PM activity.

10. After turning off the UPS, the UPS input breaker will also be switched off at the UIP panel, and apply the LOTO.

11. Kindly verify that the UPS is completely powered off and proceed with the scheduled offline PM for the UPS system.

12. The in-house team verify that UOP & PDU completely power-off and initiate the offline PM activity.

Credits: Kannan R

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Credits: Mr. Muhammad Tahir Ayub