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Liquid Resistor Rotor Soft Starter

Liquid Resistor Rotor Soft Starter
Product Code : 11
Brand Name : BIG PAWER ELECTRCIAL TECHNOLOGY
Product Description

Liquid Resistor Rotor Soft Starter

Basic Info

  • Model NO.: YDQ
  • Trademark: Big Pawer
  • Origin: Xiangyang, Hubei Province
  • Starting Current: < 1.3 Times Rated Current
  • Specification: CCC, CQC
  • HS Code: 8535900090

Product Description

Overview

Liquid Resistor Rotor Soft Starter (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.

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/T13384-2008mechanical electric products casing general technical condition
  • GB14048.4-2003 low-voltage switch devices and control devices
  • low-voltage mechanical electric contactors and motor starters

 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.
  • If the voltage of power source needs spcial design, the user should explain it while ordering goods.
  • Type explanation
  • Characteristics

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.

Technical characteristics

  • 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.
  • It is smooth in starting, so as to lower its mpact on the mechanical equipment, and the service life of the mechanical  equipment and motor can be prolonged by about 30 percent.
  • It is high in its heat capacity, and it can start for 3~10 times continuously.
  • 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.
  • 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)

YQT3-220

below 220

<55

0.37

2

YQT3-315

below 315

<55

1.1

3.5

YQT3-450

below 450

<55

1.1

5.0

YQT3-630

below 630

<55

1.1

6.5

YQT3-800

below 800

<55

2.2

10

YQT3-1000

below 1000

<55

2.2

12

YQT3-1400

below 1400

<55

4.0

15

YQT3-2000

below 2000

<55

5.5

20

YQT3-2500

below 2500

<55

7.5

28

YQT3-3200

below 3200

<55

11

38


Type  Appearance dimension mm Installation dimension mm
A B C E F Φ
YDQ5-0.2 710 700 1800 550 550 18
YDQ5-0.4 810 800 2000 650 650 18
YDQ5-0.6 910 860 2000 750 710 18
YDQ5-1 1010 960 2000 850 810 18
YDQ5-2 1210 1160 2200 1050 1010 18
YDQ5-3 1420 1260 2200 1200 1156 18
YDQ5-4 1540* 1628 2850 1200 1480 18
YDQ5-6 2610* 1628 2850 2270 1480 18



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