Rated voltage: 10kV, 6kV; Rated current: 1250A, 1000A, 800A, 630A, 500A, 400A, 315A, 200A, 150A, 100A, 50A; Protection grade: IP43; Times of short-circuit breaking and making current: 5 times of "opening - 0.3s - making opening - 180s - making opening", 14 times of opening, 11 times of making opening; Rated short-circuit breaking current: 31.5kA (effective value); Rated short-circuit making current: 80kA (peak value); Rated short-time withstand current: 31.5kA (effective value); Rated peak withstand current: 80kA (peak value); Rated short circuit duration: 4s; Rated short-circuit breaking times: 30 times 
1. The switchgear overcomes the shortcomings of the original switchgear. The novel handcart-type switchgear developed by the company has complete protection functions, high operational reliability, and convenient and simple maintenance. Small size and light weight. 2. The switch cabinet is composed of a cabinet and a handcart. It is divided into a handcart room, a busbar room, a cable room, and a relay room by a partition. The handcart has two positions for experiment and work. The handcart room is separated from the cable room by a movable insulating plate, which is particularly convenient and safe during maintenance. The handcart exchange rate is 100%, reducing maintenance time and improving power supply quality. The handcart slideway is accurate and flexible to ensure that the handcart does not deviate in and out, and a positioning navigation rail is installed to make the secondary plug accurate and reliable contact. 3. The protection function of the switchgear, after years of use in coal mines, the product can meet the protection options of different purposes, equipped with leakage, insulation monitoring, undervoltage, short circuit, overcurrent operation overvoltage, and can also be used with remote control, remote communication, telemetry, etc. The comprehensive automatic protection device can be equipped with a small current grounding protection line selection device. A series of mining microcomputer protection and measurement and control devices can be selected. The protection system has a communication interface. All information is sent to the upper-level monitoring or adjustment system in real time through the communication network. "Five remote" function. Main protection functions: 1) Short circuit protection 2) Overload protection 3) Zero sequence overcurrent protection 4) Zero sequence overvoltage protection 5) Overvoltage and undervoltage protection It also has functions such as fault memory, fault inquiry, and self-checking. Environmental conditions: The switchgear should work normally under the following conditions: a) Altitude: 1000m; b) Ambient temperature: -20℃～40℃; c) Relative humidity: 95%; in a steam environment;
