20kA 500V GW- SCR Power Supply For Caustic Soda Electrolysis

20kA 500V GW- SCR Power Supply For Caustic Soda Electrolysis

This is Silicon controlled rectifier widely used for DC 20kA 500V SCR power supply for caustic soda electrolysis plant. High Reliability Power Saving High Output Stability, High Control Accuracy Low Output Ripple High Power Factor

Product Details


     This is DC 20kA 500V SCR power supply(sillicon controlled rectifier )widely used for  for  caustic soda electrolysis plant.


2.Main Components of the System                                                

  • Three phase oil cooling transformer: include main transformer and voltage regulator with on-load tap changer for voltage regulation at primary. Cooling method: OFWF

  • SCR rectifier: 6 pulses SCR rectifier, double star circuit, each SCR is series connected with fast-acting fuse to protection SCRs.

  • Controller system: DSP based self developed micro controller, including SCR trigger, signal sampling and handling , data storage, PID operation, logic control and communication etc.

  • DC output current measurement unit, high current Hall sensor

  • Water chiller

  • High voltage switch cabinet

  • Filter cabinet

  • Output remote control by communication bus or input/output signals.

  • Complete documentation in paper and electronic form

  • Set of spare parts

  • Connecting bus between the transformer and rectifier not included

  • Input power cables and output DC bus bars are not within scope of supply.  

3.Rectifier Role in Caustic Soda Production

Rectifier system provides continuous  DC power for Ion-exchange membrane electrolyzer

the rectifier plays important role for reliable, stable and efficient running. Efficiency, reliability,  easy-to-operation, protection behavior are related performance.



High Reliability

A loss of power results in tremendous loss in production, arc furnace industry do not allow any compromise on reliability of the power supply. Protection measures (e.g high voltage absorbing circuit) adopted to protect components in case of power shortage.

Power Saving

Save energy and increase revenue, electrical energy is a costly and valuable resource and one of the major cost factors. Therefore Green Power has spent years tuning its systems to provide utilities with the highest efficiency and the lowest electrical losses.

High Output Stability, High Control Accuracy

High stability and high accuracy(default <0.5%) ensure high quality electrowinning products.  

  •  Low Output Ripple

Low ripple(default <5%) .

  •  High Power Factor

High power factor reduce reactive power, transformer's capacity and line current.

  • Long lifespan

More than 25 years lifespan, reduce investment.

  • Friendly HMI

Intelligent and convenient operation and monitor.

Convenient forming industrial network, analog signal, RS485, Profibus communication, convenient remote control.


5.Technical Data   

 Max. Output current 20KA
 Output voltage 500VDC
 Rectifier efficiency ≥98.6%
 Power factor up to 0.9 at output range
accuracy ≤±1%
 Harmonics THDi≤5%
 ripple 3%
 power supply output pulse no 6 pulse
 power supply cooling method:  water cooling




  • 1000+ power supplies per month capacity

  • ERP System for Internal Management

  • 16000m2 factory

  • Flow line assembly lines

  • Experienced capable production

  • management team

  • Qualified workers team

  • Strong craftwork ability

  • High efficiency


7.Technical Capability                                                                                     

  • Company Technical Capability Introduction

  • High-tech company

  • More than 20 years power electronics R&D and engineering experience

  • Talented technical team, Ph.D degree

  • Experience in industrial applications more than 20 years, have rich experience of both technical design and onsite service.

  • Mutual R&D with universities

  • Patent and Software Copyright certification

  • Self developed DSP(USA TI company's chip) digital controller

  • Self developed and designed products

  • Products design meet UL, CE , CSA and etc. standards

Self Developed DSP Controller



uTechnical training

uSpare parts

uTechnical support

uTroubleshooting guide

uEfficient response, reply email within 1 hours during day time(7:00am.-11:00pm UTC+8)

u16 hours Skype online(7:00am.-11:00pm UTC+8)

u16 hours mobile online(7:00am.-11:00pm UTC+8)

uGo to side if necessary

u1 year warranty period

9. Certifications


Hot Tags: 20kA 500V GW- SCR Power Supply For Caustic Soda Electrolysis ,Caustic Soda Plant,Electrolysis is used to produce chlorine and caustic soda from brine

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