[Resolved] Maintenance in Maidenhead: Sunday 27 October 2013
Wednesday, 16th October, 2013
19:29pm
This maintenance should not impact clients and is posted for information only as the entire data centre will switch over to generator power for the duration.
============================================ When: Sunday 27 October 2013 Where: Maidenhead Data Centre What: The data centre will be running from Generator Power due to essential Maintenance
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We have received a notification from Scottish and Southern Energy (SSE) regarding a need to proactively replace components within the Metering Circuit Breaker, housed within the Substation Enclosure that is on-site at our Maidenhead Data Centre. Please note that this equipment is owned and maintained by SSE and is not housed directly within the data centre.
There is no expected downtime from these works and there is no requirement for any action on the part of customers. This is a courtesy notice as the work is being performed by third parties, and is not part of our day to day running of the facility.
The components to be replaced are Voltage Transfer (VT) switches. An investigation has shown specific problems with swing type VT switches where partial discharge and/or corrosion has resulted in the transfer switch activating on an earth fault thus disconnecting the power to the supplied facilities. Whilst this type of event is low risk for the data centre due to their UPS and Generator systems being able to sustain operating load, significant remedial work would be required in the event of a VT switch failure. The manufacturer has therefore recommended a visual inspection and replacement of the components.
The works will be carried out with the supply of power disconnected and for the duration of the inspection and upgrade, the Maidenhead facility will be run from generator power.
Prior to works commencing, we will bring primary incoming mains supply down and switch to generator power. This is a tried and tested process which is carried out by the data centre regularly with their Black Building test programme.
The failover of power is a non-disruptive one where load is transferred from the mains switching equipment to the UPS systems and then onto generator services.
Once the facility is running correctly from generator, work will then commence on the SSE equipment. On completion of any works required, the data centre will complete the process for failing back to mains power.
The work is scheduled for 8AM on Sunday 27th October 2013 and will be completed by 5PM on the same day at the latest.
All works to the SSE equipment will be carried out by SSE staff and representatives of the switch gear manufacturers. The data centre will also have on-site their Maintenance and Engineering Contractors and their Facilities Manager.
