The city is fully electrified by the Kerala State Electricity Board (KSEB). The district is divided in to three circles: Transmission circle, Thiruvananthapuram city and Kattakkada. Domestic users account for 43% of the total power usage, or 90 million units per month. Thiruvananthapuram district has one 220 kV, nine 110 kV and six 66 kV electrical substations. A 400 kV substation has just been commissioned by the Power Grid Corporation and will ensure high-quality power supply to the city. 