Engineered System (Electrical) Ltd attend site of emergency breakdown work for Seashore holiday park in Great Yarmouth, England.

ESE Ltd carried out investigation and repair work on a reported transformer failure.
The Emergency Maintenance team attended site within four hours to carry out the initial investigate on the faulty transformer. Due to the age of the switchgear feeding the transformer, and restrictions in place upon it, a full site isolation was required.

Working in conjunction with UK Power Networks, site was fully isolated in the early hours of the morning causing minimal disruption to site. The equipment was safely isolated and post fault maintenance was completed on the switchgear. It was found that the switchgear was clear of any fault and that the fuse protection had operated.

The remaining equipment on the holiday park was re-energised, with the affected fuse switch isolated and earthed. The incoming feeder cable was disconnected from the switchgear with initial test results showed that the fault was downstream. The oil was then drained from the transformer and the High Voltage links were disconnected. Our fault location test equipment was applied to the cable and the area of fault was located.

The fault was located in the High Voltage old type bitumen filled termination box. This was then visually inspected with no sign of any kind of bitumen leak. ESE Ltd then removed the front cover of the termination box. After inspection this showed a clear void which had filled with water. The void was created from incorrect filling, during the original installation process.
The termination box was replaced with a new dry type air box and the 11kV cable was through jointed, terminated and tested. Again, working with UK Power Networks, the whole site was isolated in the early hour of the next day, to reinstate the isolated transformer.

The site General Manager was extremely happy after completion of all work (see below).
“Many thanks for you and the ESE team’s assistance in getting the HV repairs done at stupid o clock. Really appreciate you pulling the stops out. Fully Back on the grid now and with minimal customer issues”