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  • Ydq Liquid Resistor Rotor Soft Starter - China

    price: contact company for price

    YDQ5 liquid resistor rotor starters (hereinafter

    referred to as starters) are the new kind of starting devices developed

    for improving the starting feature of large- and medium sized wire-wound

    AC asynchronous motors. Having solved the problems of frequency

    sensitive resistor starters which are high in impact current, difficult

    in starting and not easy to operate, the starters of this are suitable

    for the heavy-load starting of the motors of ball grinding mills, air

    compressors, crushers, large-sized blast fans and large-sized pumps

    which are used in the industrial branches of building materials,

    metallurgy, chemical industry, mining. They are the ideal substitutes

    for frequency sensitive starters and metal resistor starters.


    1 Fundamental Principle

    Allow the relative distance between the two parallel plates in the conductive liquid to decrease progressively up to zero through a mechanical driving device and make the resistance value run into the return circuit of motor rotor decrease continuously, so as to realize the heavy-load smooth starting of large- and medium-sized wire-wound motors.

    2 Technical characteristics

    2.1 The starting current is low but constant without impact on power network; the starting current is no more than 1.3 times the rated current. Therefore the requirements of the heavy-load starting of motor for transformer capacity can be decreased, reducing lump sum investment.

    2.2 It is smooth in starting, so as to lower its impact on the mechanical equipment, and the service life of the mechanical equipment and motor can be prolonged by about 30 percent.

    2.3 It is high in its heat capacity, and it can start for 3~10 times continuously.

    2.4 It can still start under low voltage state. Smooth start can be ensured so long as the voltage of the power network can guarantee the motor to operate normally.

    2.5 It is simple in structure, easy to maintain. Its reliability is more superior than that of frequency sensitive, oil-soaked type resistors.

    Company Contact:

    • Phone: 8607103159893

    • Address: No. 5 Hangyu Road, Xiangyang, China

    • Email: Email

    Published date: April 22, 2014 -

    • Business Description: Big Pawer group owns 41 patents and many originated technology

      innovations in soft start branch. The world s first high voltage thermal

      resistance soft starter and TCS voltage reduced compensation solid soft

      starter are invented by our group. Besides we ve invented first

      intelligent static phase advancer, first liquid resistor starter, high

      voltage frequency converting soft starter in China.

      We are considered as cradle of Chinese soft start technology. We have been cooperating with best universities in China and we also have several research centers in different provinces. Our products series are being exported and equipped in more than 30 countries and areas. Many power system programs are designed by our group and equipped with our comlete set of electric systems. We have the strength to compete with world famous companiese in soft start branch.

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