BQD-□J mining explosion-proof electromagnetic starterDetailed product description：

·Scope and Application

BQD - □ J mining explosion-proof electromagnetic starter (autotransformer) is suitable for controlling the pressure reducing starting and stopping of mining explosion-proof three-phase squirrel cage asynchronous motors in environments with explosive mixture gases such as methane and coal dust in underground coal mines and surrounding media. It operates at AC 50Hz, rated voltage of 1140V or 660V, and rated power up to 95kW. The starter is equipped with an autotransformer, AC contactor, time circuit breaker, intermediate relay, thermal relay, transfer switch, fuse, voltmeter, indicator light, etc., and has functions such as overload, short circuit, voltage loss, and phase failure protection.

·Model and meaning



Technical parameters of BQD - □ J mining explosion-proof electromagnetic starter (autotransformer)

Model, Specifications	Motor power （kW）	Rated Current （A）	Capacity of autotransformer （kVA）	Current transformer ratio （A）
BQD-14J	fourteen	twenty-eight	fourteen	25/5
BQD-22J	twenty-two	forty	twenty-two
BQD-28J	twenty-eight	fifty-eight	twenty-eight
BQD-40J	forty	eighty	forty	150/5
BQD-55J	fifty-five	one hundred and ten	fifty-five
BQD-75J	seventy-five	one hundred and forty-two	seventy-five	300/5
BQD-80J	eighty	one hundred and fifty-five	one hundred and fifteen
BQD-95J	ninety-five	one hundred and eighty	one hundred and fifteen