Supply explosion-proof electrical explosion-proof lamps, Shanghai amount giant explosion-proof star triangle starter box Ⅱ B supply explosion-proof electrical explosion-proof lamps, Shanghai amount giant explosion-proof star delta starter box Ⅱ B, supply explosion-proof electrical, explosion-proof lamps, Shanghai amount giant explosion-proof star delta starter box Ⅱ B BQJ51 series of explosion star delta starter box (Ⅱ B) 1,1 and Zone 2 dangerous places. 2, Ⅱ A, Ⅱ B class for explosive gas atmospheres. 1, the product is suitable for 3-55KW three-phase asynchronous motors with frequent starting and stopping. 2, cast aluminum or steel plate welded shell, the surface spray. 3, built-in circuit breaker, AC contactor, time relay, thermal relay, current transformer, voltmeter, ammeter, switch, indicator. 4, the delay automatic control time relay (adjustable) 0 to 60 seconds. 5, applies to non-stop long-term working or repeated short-time work, the operating frequency of 30 times / hour under the repeated short-time work, two consecutive start clearance of not less than 90 seconds. 6 with overload, short-circuit, open-phase protection function. 7, can be made to order. 8, steel pipe and cable wiring. Aluminum alloy shell, 55kW (containing less than 9,55 kW 55kW) for steel plate welded housing. 1, overcurrent protection, short circuit protection, over voltage protection, under-voltage protection, instantaneous power failure protection and phase failure protection. 2 digital display or pointer display frequency, speed and load rate or current. 3, you can manually adjust the frequency. You can set the speed change by the time the technology curve. Signal can be given by the DCS system to control its frequency. Frequency converter of the imported components. The cabinet is also equipped with ammeter, voltmeter, automatic air switch, indicator light, AC contactors, power frequency-conversion switch and start and stop button. Design according to process requirements of different users, devices and the preparation of a variety of appropriate operating method. 4, pipe or cable wiring. 5, in line with GB3836-2000, IEC60079 standard requirements.