BQJ Series Explosion-Proof Electromagnetic Autotransformer Reduced-Voltage Starter, Explosion-Proof Starter, Explosion-Proof Electromagnetic Starter, Explosion-Proof Autotransformer Box, BQJ Series Explosion-Proof Autotransformer Reduced-Voltage Starter 1. Zone 1 and Zone 2 hazardous gas environments; 2. Group IIA, IIB T1~T4 explosive gas or vapor atmospheres; 3. Indoor and outdoor use (IP54). Technical Features 1. Aluminum alloy enclosure or steel plate welded construction with surface plastic coating; 2. Equipped with autotransformer, AC contactor, thermal relay, circuit breaker, time relay, current transformer, voltmeter, ammeter, selector switch, indicator light, and other components; 3. The product features protection functions against overload, short circuit, undervoltage, and phase loss; 4. Customizable according to user requirements; 5. Conduit or cable wiring.