Modification sub-distributors BIT-2

Modification sub-distributors BIT-2

25-11-2020 13:00:00 - 26-11-2020 19:30:00
Urgency: Planned
Timewindow:
25/11/2020 13:00 hrs - 25/11/2020 19:30 hrs
26/11/2020 13:00 hrs - 26/11/2020 19:30 hrs
Expected impact:
- Slight increase in temperature
- Cooling equipment BIT-2A (partial)
- No redundancy in power generators
Customer intervention required: No
Reference number: 170772

Summary:

We will be performing an upgrade of the electrical distribution.

Details:

During this maintenance, two of the three automatic transfer modules for the emergency power generators will again be replaced with a newer model one at a time. The previous maintenance didn't go as planned, so the module will be replaced again. During the maintenance, the automatic transfer module in the sub-distributor for one of two power feeds for BIT-2A UPS sets, one of the three chillers, three out of eight down flow units (responsible for blowing cold air in the data centers) of BIT-2A will be replaced.

This upgrade is necessary because the current model of the automatic transfer module is no longer in production. In the event of an unexpected grid failure during maintenance, this sub-distributor will be switched to generator power by hand.

The second sub-distributors which provides power to the UPS sets in server room BIT-2A will be fully operational during this maintenance and will switch to generator power automatically in case of an unexpected grid failure. The upgrade will be tested which will result in a restart of some computairs in server room BIT-2A and disruption of several seconds in power to one of the two UPS sets during the switchover. This may result in a slight temporary increase in temperature in the data center.

Power from the UPS sets to the data center will never be interrupted. This maintenance will be supervised by BIT engineers.