Mirchaiya substation with double bus system located at Mirchaiya of Siraha district, Sagarmatha Zone, supplying electricity to Katari and Mirchaiya. This substation is connected to the Dhalkebar substation and Lahan substation by a dual-circuit 132 kV line. This substation was put into operation in 2017 with a capacity of 132 / 33kV, 30 MVA.