1. It is widely used in flammable and explosive gas environment such as oil exploitation, refining, chemical industry, offshore oil platform, oil tanker, etc. It is also used in flammable dust places such as military industry, port, grain storage and metal processing;
2. Applicable to Zone 1 and Zone 2 of explosive gas environment;
3. Applicable to IIA, IIB, IIC explosive gas environment;
4. Applicable to areas 21 and 22 of flammable dust environment;
5. Applicable to the temperature group is T1 ~ T4 / T5 / T6;
6. It can be used for remote start or direct control of start, stop and forward and reverse of three-phase squirrel cage motor, and can protect motor overload, under voltage, short circuit and phase failure. There should also be pre-level power distribution and protection during installation.