Tata Power Delhi Distribution Limited (TPDDL) has installed a 630 kVA submersible transformer under the parking space of its substation building in Gujranwala Town in New Delhi.
It is a first-of-its-kind submersible distribution transformer set up by a utility in India, installed in collaboration with Toshiba Transmission and Distribution Systems (India) Private Limited. The transformer is equipped with temperature and pressure sensors for monitoring and planning maintenance activities. The equipment is suitable for water submersion duty. Smart meter with digital input/output has been installed for monitoring the load and raising alerts in case of an issue. The 11kV supply for transformer is fed through ring main unit having special relay which controls the switching and automatic tripping under abnormal network conditions. This transformer can be easily installed under the multilane main roads, service roads, public parks, building parking, basements, and public parking places. Hence it is virtually a zero-space installation, as the top surface can be used for general purpose application like walk ways, roads, parks etc.