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Explosion-proof magnetic starter can control AC 50Hz, 380V three-phase asynchronous motor direct start, stop, and overload, short circuit, phase loss and pressure loss protection. Explosion-proof magnetic starter is mainly applicable to hazardous areas in zone 1 or zone 2 in explosive gas atmospheres. Explosive gases and vapours are IIB or IIC, T4 and below. Direct start of three-phase asynchronous motors with control AC 50Hz and rated voltage up to 380V , stop or reverse use, with overload, phase loss, voltage loss, short circuit protection.
Explosion-proof magnetic starter is used as equipment nameplate, coal safety mark, explosion-proof mark, eye-catching, shell without cracks, open welding, deformation and paint off, and anti-corrosion treatment, the inner wall must be evenly painted arc resistant paint, fastening bolts, Nuts, washers, etc. are complete, fastened, and free of rust. The specifications of the nut and bolt in the same part of the explosion-proof magnetic starter are the same. The specification of flat washers and spring washers should be consistent with the bolt diameter. Proof magnetic starter fastening bolts, nuts should be locking means, the fastening member with a bolt of screw eye impermeable, Xu left rear fastening screw is greater than twice margin threaded locking washer thickness. The length of the bolt screwed into the screw hole should not be less than the diameter of the bolt, single cast iron, copper, aluminum parts should not be less than 1.5 times the diameter of the bolt.
After the explosion-proof magnetic starter nut is tightened, the threads of the bolt shall expose 1~3 pitches of the nut. No additional washers shall be added under the nut to reduce the protruding length of the bolt. The explosion-proof joint surface shall be kept clean and complete, and shall not have rust and paint. Should be coated with anti-rust oil or phosphating. Explosion-proof magnetic starter observation window hole seal and transparency is good, no damage, no cracks, the shell must be provided with galvanized grounding bolts, and marked with a grounding sign. After the live parts inside the explosion-proof magnetic starter opening, warning signs shall be provided "Electrical Hazard" and other words, the complete explosion chamber components, and no defects or cracking.
Explosion-proof magnetic starter is a compound type, the main chamber is explosion-proof structure wiring chamber for increased safety structure, cast aluminum alloy housing, surface spraying, beautiful appearance, built-in high quality AC contactor, thermal relay, fuse, self-resetting universal conversion Switch and so on.