1. 1. The electrical cabinet is grounded, and the equipment installation conforms to the five-wire power supply system. Each device must have PE row and N row, and there is no connection between zero ground. The grounding bars between multiple electrical cabinets must be connected with 16mm2 yellow-green wires; The bracket of the electric cabinet and the door of the electric cabinet with components must be connected with the grounding rod of the electric cabinet with a yellow-green wire of more than 2.5mm2; One end of the shielding layer of the shielding wire installed in the electrical cabinet must be connected with the grounding rod. 2. The junction box and operation console are grounded, and there must be a grounding point in the junction box, and all moving parts must also be connected with the grounding point.
2. Equipment installation grounding system. 1. According to customer's requirements, there must be a repeated grounding system beside the equipment, and all grounding systems should be connected as much as possible to form a workshop grounding network. The grounding system must be connected with the grounding rod of the equipment control cabinet and the power cabinet in the equipment fuselage, and the contact is fixed and reliable. 2. The fuselage grounding system, independent fuselage and moving parts or junction box operation station must be connected with the grounding rod in the electrical cabinet through the grounding wire. The wire diameter depends on the installation load of the fuselage, generally not less than half. 3. Shielding cable grounding, inverter power supply cable and control loop shielding cable must connect the shielding layer with the grounding rod in the electrical cabinet. Three sides of the shielding layer are required to be connected with yellow-green wires, and safety measures are taken to connect with the grounding rod with yellow-green wires.
4. Bus grounding system, bus and plug installation must be divided into two layers, and the shielding layer must be connected with the outer layer of the plug.
Electrical workshop
20 1 1- 1 1- 1
List of personnel in electrical workshop
Garage: Gu Changhua, Li Jianping
Product category 1: Bian Wei, Huang Zhilong, Zhu Yonggui.
Zhou Xiaoqing
Zhang shangquan
Product category 2: Meng Sheng
Ju Guo Ping
outer city wall
High maintenance level: open pine forest
Yue Guoqing
Liu Sunlong Liao Zhao Hongxiang Section Wu Yanwen Jianqing 20 1 1 year 65438+February.