25-08-2017, 09:32 PM
The substation can be divided broadly in to two sections ‘the yard’ and ‘the control room. Yard contains almost all the equipments while control room contains equipments to control the system . Any equipments in yard can be controlled from control room. The yard have many equipments like power transformers, isolators, lightning arrestors, insulators Ckt breakers, capacitor bank etc. The most of these equipments are protecting equipments used for protecting the system.The single line diagram of the yard is shown on next page. The single-line diagram gives an idea as how the 132kv is stepped down to 11kv for distribution. The 11kv thus achieved from 200MVA X-mers , taken through underground cables to the main control room.