Mv Ydq Series Liquid Resistor Rotor Soft Starter
|FOB Price:||US $4,985-8,806 / Piece|
|Min. Order:||1 Piece|
|Min. Order||FOB Price|
|1 Piece||US $4,985-8,806/ Piece|
|Production Capacity:||50, 000 PCS/Year.|
|Transport Package:||Wooden Case|
|Payment Terms:||L/C, T/T, Money Gram, Western Union|
- Model NO.: YDQ
- Trademark: Big Pawer
- Origin: Xiangyang, Hubei Province
- Starting Current: < 1.3 Times Rated Current
- Specification: CCC, CQC
- HS Code: 8535900090
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 series 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.
2 Standard & criterion
GB4720-1984 electric control devices part I low-voltage electric control devices
GB4942.2-1993 low-voltage electric devices shell protection grade
GB/T5226.1-1996 industrial mechanical electric devices part I general technical condition
GB/T13384-2008 mechanical electric products casing general technical condition
GB14048.4-2003 low-voltage switch devices and control devices
low-voltage mechanical electric contactors and motor starters
3 Working condition
Upper limit of ambient temperature is no more than +50ºC, and lower limit is no less than -5ºC.
The relative humidity is no more than 85 percent. The height above sea level is no more than 2000m.
It should be placed on an indoor place without obvious shake and impact, without fire and explosive dangers and the vertical gradient is no more than 5º.
There must be no conductive dust and corrosive gas.
Power source is four-wire three-phase system of 380V/220V 20A, the undulation of voltage must be guaranteed within 15 percent of rated voltage.
Note:1)The heater needs to be installed additionally when the ambient temperature is under 0ºC over a long period of time, the user should explain it while ordering goods.
2)If the voltage of power source needs spcial design, the user should explain it while ordering goods.
4 Type explanation
4.1 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.
4.2 Technical characteristics
4.2.1 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.
4.2.2 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.
4.2.3 It is high in its heat capacity, and it can start for 3~10 times continuously.
4.2.4 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.
4.2.5 It is simple in structure, easy to maintain. Its reliability is more superior than that of frequency sensitive, oil-soaked type resistors.
|Type||Rated Motor capacity(KW)||Resistor box temperature(ºC)||Circulation pump(KW)||Cooling water(t/h)|
|Type||Appearance dimension mm||Installation dimension mm|