What is the 3T connection of 1 10kv power grid? [household appliances]

3T connection means that each 1 10 kV substation is equipped with three main transformers, and each 1 10 kV line is t-connected with the three main transformers. 3T wiring generally adopts line transformer bank, and there is no bus at the high voltage side of substation.

Using 3T wiring has many advantages:

The power grid has simple structure, few equipment components, easy protection setting, flexible dispatching operation mode and high reliability. However, if the connection mode of 3T connection is not suitable, the load capacity of the power grid will be greatly reduced, the construction cost will increase and the reliability will not be guaranteed.