For the distribution transformer capacity at 100kV · A power distribution box and above, in the box by the side wall of the outdoor thermal windows proof distribution box, you should take into account the installation of the thermostat relay (JU-3 type or JU-4 subminiature temperature relay) and axial fans, electrical control panel is mounted on the side of the left side of the box, so that the inside temperature reaches a certain value (eg 40 ℃) can automatically start the exhaust fan, exhaust heat is forced to make the box cooling. (1) the construction of electricity distribution system should be set to the main distribution box, distribution box, switch box, and follow the "total - points - on" order for Grading corrosion proof distribution box, and the formation of "three distribution "mode. (2) the construction of each distribution box with a power distribution system, the installation position of the switch box to be reasonable. The total distribution box should be as close to the transformer or external power source in order to introduce the power supply. Distribution box should be installed in the electrical equipment or load is relatively concentrated in the heart, to ensure that the three-phase load balance. Position switch box should be installed depending on site conditions and working conditions as close to the electrical equipment under their control. Mine explosion distribution box, 20-year Koretoyo proof (certified), baodi explosion distribution box from Zhejiang Koretoyo explosion-proof electrical Co., Ltd. Tianjin offices. Zhejiang Koretoyo explosion-proof electrical Ltd. Tianjin Office (#) is Tianjin, explosion-proof lighting leader, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Koretoyo explosion in leadership with the staff warmly welcome all inquiries to discuss, but to create a better future abundance of proof.