1．Can be used in Zone 1 and Zone 2 dangerous places．
2．Can be used in Ⅱ A、Ⅱ B group explosive atmosphere．

Features
1．Suitable for to unfrequently controlling 3～55kW asynchronous motor．
2．The shell is of diecast A1-alloy or welded by steel plates with plastic-sprayed surface．
3．Inside is installed with CB，AC contactor，time relay，thermal relay，CT，Voltmeter， ammeter，selector and indicator．
4．Delayed self-controlled relay(0～60s adjustable)．
5．Suitable for to continuously work or short interval work，at short interval work its operating frequency is 30 times／hour，the interval is not less than 90 seconds．
6．With protections of overload，short-circuit，phase-failure．
7．Special requirements can be provided．
8．Suitable for both steel pipe and cable wiring．
9．The shell is of diecasted-A1，if≤55kW，welded steel plate，if>55kW．