国产h片在线观看_成人精品久久_欧洲美女屁股眼交3_黄色在线观看网址_午夜精品免费视频_av资源片_51国产在线_大学生gayxxxx浪小辉_黄色网页入口_国产精品久久久午夜夜伦鲁鲁_日韩色电影_裸体软件_蜜桃视频一区二区三区在线观看_秋霞在线观看视频_99精品国自产在线

The shell of metering distribution box is made of high-quality cold-rolled steel plate, and the door of the box is provided with an observation hole;

For single-phase meter box and three-phase meter box without switch, the cable directly enters and connects to the wiring bus bar, and the user of each unit directly goes from the watt hour meter. For the single-phase meter box with single-phase switch, the cable is connected to the wiring bus bar, and connects from the outlet end of the switch to the unit user, and the lead seal wire is used after the installation and commissioning;

Cable inlet and outlet from the top or bottom are available. The switch room is equipped with three-phase wiring bus bar and protective grounding bus bar, which is convenient to realize single-phase two-wire, single-phase three-wire, three-phase four-wire and three-phase five-wire power supply. The box is equipped with lead sealing screws, and the line partition can be made according to the customer's requirements to separate the switch from the meter.