A purpose 
 QBZ Series Flameproof AC vacuum soft starter for mixed gas containing methane, coal mine with explosion hazard. In the following rated voltage up to 1140V, rated frequency of 50HZ, rated current of 400A the following three-phase asynchronous motor soft start, soft stop, you can start local or remote and on-line control of three-phase asynchronous motor. 
 Two main functions 
 The company produced a series of soft-starter with imported high-power and power electronics, microprocessor technology and modern control theory, applied in the coal mine heavy Nan starting, constant speed motor control to run equipment, and domestic large-scale use of tradition now control compared with the following salient features: 
 1, the elimination of mechanical dynamic load impact, extend service life of the motor and related equipment; 
 2, the motor starting current, reduce the impact of power grid and reduce the power distribution capacity; 
 3, the unique frequency speed control, enhance the starting torque to achieve heavy start; 
 4, load automatic tracking technology, dual-operation can achieve power balance; 
 5, microprocessor control system, fuzzy control and zero-current off-off technology, with high load capacity of adaptation and electromagnetic compatibility, performance, stability and reliability; 
 6, digital control systems, configure the parameters according to user needs; 
 7, has a communication interface to facilitate the automatic control; 
 8, with a variety of starting models and protection. 
 Enterprises continue to create "people-oriented, innovation as the source, the quality of life" of culture, adhere to the "integrity" of the spirit. We are adhering to the "advanced technology, sincere to the essence, to benefit the customer" to the community to provide leading technology, excellent quality, reliable products, the market for users to create the best value for money. 
 Three main technical parameters 
 Rated voltage 
 V rated 
 For the current 
 A When? ? cosΦ = 0.75 when 
 Controlled motor control back to the maximum power KW 
 Voltages 
 A limit of breaking capacity V 
 660V 1140V 
 1140/660 120,100,170,361,500 (3 times) 
 20034-170 60-2962500 (3 times) 
 31534-270 40-4654500 (3 times) 
 40068-340 120-5856000 (3 times)