+44 (0) 344 888 444 5

+44 (0) 344 888 444 5


As the UK’s flagship broadcaster, with scores of broadcast locations throughout the UK, continuous power supplies are vital in ensuring license fee payers receive their world-leading services.  With a number of BBC Glasgow studios relying on a Mitsubishi Air Circuit Breaker to guarantee backup power supplies, the BBC were referred to shentongroup which swiftly and professionally replaced the compromised parts.

The Problem

BBC Glasgow has a number of studios used on a daily basis for light entertainment and daytime quiz shows that either need recording for later transmission, or transmitting live to Scotland and Northern Ireland direct from the studios.

shentongroup’s Technical Director, Derek Barry explains Air Circuit Breakers: “Air Circuit Breakers help to prevent the reestablishment of arcing by creating an arc voltage in excess of the supply voltage”.  Derek continued: “The problem at BBC Glasgow was that, when one of the building’s Mitsubishi Air Circuit Breakers failed to operate, it resulted in a number of studios being left unable to switch off the power to the main lighting circuits.  Therefore, replacement parts were needed to be sourced and expertly installed as soon as possible”.


Following a call to the Mitsubishi UK headquarters in Hatfield, the problem was referred to shentongroup’s ACB and Switchgear Service Division.  A shentongroup engineer was promptly despatched to the site to investigate the problem and established that the unit needed replacement.  The faulty unit was removed and a new device fitted, installed, tested and fully calibrated using an injection tester.

“shentongroup responded very quickly to our request.  The company’s engineer was very professional and did an extremely efficient job, which was carried out within budget to our complete satisfaction”, commented Andy Main, BBC Scotland Electrical Engineering Manager.

shentongroup’s Derek Barry weighted the importance of Switchgear and Air Circuits Breakers (ACB’s) maintenance: “Regular maintenance and servicing of Switchgear and Air Circuits Breakers (ACB’s) is essential for reliable and trouble-free operation. shentongroup has a nationwide team of service engineers, trained to provide ongoing and scheduled maintenance on all makes and sizes of switchgear and ACB’s”.


Fully understanding that time is of the essence in relation to all kinds of continuous power supply system repairs, thanks to shentongroup’s speedy reaction, the replacement parts for BBC Glasgow’s faulty ACB unit were sourced, fitted, tested and calibrated, resulting in all affected studios being fully operational and with a reliable backup power supply system in place.

“shentongroup are now proposing to carry out regular servicing for this customer to prevent further malfunctions”, said Chris Evans, Customer Technology Centre Manager at Mitsubishi UK.

About shentongroup

shentongroup is the UK’s leading technical expert in standby power, uninterruptible power supplies, and combined heat and power supplies. The company provides power solutions to organisations spanning a broad array of industries that rely on continuous power supplies and includes; finance, IT, telecoms, healthcare, manufacturing, retail, education, government, utilities, and sport and leisure.

For installation, replacement and regular maintenance and servicing of High and Low Voltage Switchgear and Air Circuit Breakers, shentongroup has a nationwide team of engineers trained to provide ongoing and scheduled maintenance on all makes and sizes of switchgear and ACB’s.  Annual or one-off service visits on all types of HV/LV switchgear can be carried out within normal working hours, or out of hours on the following equipment; LV Switchgear; Many manufacturers of ACB’s; HV Switches; HV Transformers.  shentongroup’s service and inspections would typically include; Visual inspection; Cleaning; Lubrication; Busbar Integrity; Insulation safety; Full ‘current injection’ testing and calibration.

To find out more about your standby power options, contact the shentongroup technical team on 0844 888 444 5 or request a site survey here.

Download this case study in pdf format here.

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