Product Introduction

SBW-F series products are improved versions of SBW series products, suitable for three-phase unbalanced power grids. When the three-phase unbalanced power grid fluctuates or the load current changes greatly, it can automatically balance the three-phase voltage and keep the voltage stable.

Working principle

SBW-F series three-phase split-phase fully automatic compensation voltage stabilizer is used to stabilize voltage fluctuations caused by three-phase unbalanced grid voltage, unstable voltage or load changes. Compared with other voltage stabilizers, this series of products has the characteristics of three-phase automatic balance, large capacity, high efficiency, small waveform distortion, and stable voltage regulation. This series of products is suitable for various loads, can withstand instantaneous overload, and can work continuously for a long time. This series of products has functions such as manual/automatic switching, overvoltage protection, phase loss protection, phase sequence protection, and mechanical failure protection. The product is small in size, light in weight, easy to install, and reliable in operation. (Full digital LCD display).

Voltage regulation principle(Each phase voltage is regulated independently)

The primary winding connection of control and transforming voltage regulator TVV is in Y shape connected to the output end of the voltage stabilizer and connecting with the primary winding of compensating transformer TBa, but the secondary winding of the compensating transformer TBa is series-connected in the main circuit, Taking phase A as an example to indicate the working principle of the voltage stabilizing as shown in Fig.1. If the voltage drop of the impedance of the compensating transformer is negligible, it can be see from the picture above:

  Uao= Uai + UBa The principle is: when input voltage Uai of phase A increases △Uai compensating voltage Uba correspondingly changes △Uba and when △Uai is equal to-△Uba ,output voltage Uao of phase A keeps no change, and phase B and phase C is the same as phase A.

  The process of the voltage stabilizing is: depending on the variation of the output voltage, voltage measuring unit obtains the sample of such variation, measures it and outputs the signal to control SM operation of the servo-motor, through the speed-reducer and chain wheel, to make the brush set sliding or rolling on voltage regulator TVV to regulate the secondary voltage of TVV so as to change the polarity and size of the compensating voltage and assure that the output voltage is automatically stabilized within the allowable setting accuracy range of the voltage stabilizing, thus achieving the automatic voltage stabilizing.

Control Principle Diagram

Control principle topology diagram

List Of  SBW-F AVR Technical Parameters

List of  SBW AVR Models & Products

1.Three-phase Model List(Their rated input voltage can be Three-phase 200V/220V/380V/440V/480V etc)

Application

This series products have been used in large-scale Electromechanical equipment of the field metal processing, equipment production line, construct project equipment, elevators, medical apparatus, machine room of personal computer, computer control equipment, embroidery equipment, air-conditioners, broadcasting and television equipment, any places where the stable power supply is needed in the fields of industrial and mining enterprises, agriculture, print, medical care, machine tool, traffic, post and telecommunications, military affairs, railway, research and cultural, etc.

Cases and Gallery

3phase-1250KVA(input 380V±20%  Output 380V±1%)

3phase-250KVA(input 380V±20%  Output 380V±1%)automatic control balance

3phase-1500KVA(input 380V±20%  Output 380V±1%)automatic control balance

3phase-1000KVA(input 380V±20%  Output 380V±1%)automatic control balance

3phase-500KVA AVR(input 380V±20%  Output 380V±1%)

3phase-2500KVA AVR (Input 380V±20%  Output 380V±1%) Inside(front&back)

3phase-200KVA(input 380V±20%  Output 380V±2%)

3phase-50KVA(input 380V±20%  Output 400V±2%) AVR used in turning and milling machine

Medical imaging equipment CT field use stabilizer