On Sunday August 17 2008, at approximately 1:05 a.m. there was a total system shutdown when a fault occurred on the 24/11 kV Distribution transformer located at Spring Garden during stormy weather.
Personnel from our Generation Department were deployed to assist with the restoration effort, which commenced at approximately 2:30 a.m. Most of our customers were back on supply by 6:00 a.m.
The SCADA dispatchers then reconfigured the Distribution network to ensure that those customers normally supplied from the faulty transformer could receive adequate service. This process was completed by 8:00 a.m.
Later that day our Substation Technicians proceeded to investigate the problem on the transformer and determined that one of the phases was faulty. Based on this evaluation, it was determined that extensive work would be needed to effect repairs. In view of this, it was decided that efforts would be made to fast-forward the commissioning of the second transformer and the new 11kV switchgear at Spring Garden. The installation of this second transformer forms part of our plans to improve system reliability and work was already well advanced.
Our Jointing crews and Substation Technicians worked through Sunday night and well into Monday morning to ensure a successful changeover of the circuits supplying the Holetown and Grazettes areas.
This exercise required considerable effort and coordination by our engineers, SCADA personnel and crews. We therefore wish to express our sincere appreciation to all involved for the effort expended and the efficiency with which this emergency was handled.