Dieselec Thistle Generators completes power system for international data centre

We have supplied and installed a 12.5 MVA standby power system at a new international financial services data centre in Edinburgh.

The fully integrated system, testing and commissioning, including deployment of multi megawatt high voltage resistive/reactive load banks, was delivered on budget and in line with the tight timescales stipulated by this mission critical client.

The data centre building management team said: “The work to integrate the new HV generator system into the site was carried out extremely well, and this innovative solution provides us with a resilient power supply back-up to ensure our customers’ service is always maintained. The new control system provides us with full HMI and provides improvements in remote CBM and safety. The project was successfully built into the existing HV network without any service disruption. Dieselec was very attentive to our requirement for work on this critical site.”

DTG has supplied five 2.5 MVA, 11,000 volt, high voltage diesel generators synchronised together to produce 12.5 MVA of prime rated power. Sound attenuation, ventilation, exhaust flue and bulk fuel systems were used in the installation, along with a complete power management system consisting of ComAp InteliGen, InteliVision, InteliMains and Bus-Coupler controllers. Associated controls cabling in this complex system included over 1,000 terminations.


The data centre must operate in two strings (red and green) with full redundancy in both. This involved the building of an overall control suite complete with dual redundant mains controllers and buss tie controllers to provide a 100 % wrap round in the event of any string experiencing a power loss. The completed system allows full on load testing with front and back synchronisation of the selected string under the control of the duty engineer. The system acts as an automated AP for all HV switching and the local and remote HMI screens ensure all site personnel have full view of the network and the operational sets.

To ensure that the equipment met the design brief and worked first time, there was a witnessed factory test to 110 % load on all five generators. This was carried out at DTG’s purpose built 10,000 sq ft test cell located at the Glasgow HQ.

Kenny Berrie, Technical Manager, Dieselec Thistle Generators, said: “Having been involved from the early concept stage, and working with all the key stakeholders throughout the design reviews and staged implementation, we’re delighted to have completed this project. With 100% resilience, this quickly changeable and easily manipulated system is fully compliant and offers the client a really flexible solution to meet their needs. ”

The completion of this new data centre installation adds another successful project to DTG’s portfolio of high voltage standby power installations, including the NHS Southern General Hospital, NHS Forth Valley Hospital, NHS Cramlington Hospital, Goldman Sachs, PWC and Bank of China.