Cathode protection rectifier

1. Cathode protection introduction

      Cathodic protection (CP) is a technique used to control the corrosion of a metal surface by making it the cathode of an electrochemical cell. A simple method of protection connects the metal to be protected to a more easily corroded "sacrificial metal" to act as the anode. The sacrificial metal then corrodes instead of the protected metal. For structures such as long pipelines, where passive galvanic cathodic protection is not adequate, an external DC electrical power source is used to provide sufficient current.


      Cathodic protection systems protect a wide range of metallic structures in various environments. Common applications are: steel water or fuel pipelines and steel storage tanks such as home water heaters; steel pier piles; ship and boat hulls; offshore oil platforms and onshore oil well casings; offshore wind farm foundations and metal reinforcement bars in concrete buildings and structures. Another common application is in galvanized steel, in which a sacrificial coating of zinc on steel parts protects them from rust.

2. Why use IGBT rectifier instead of SCR rectifier

  -Low maintenance

  -Light weight, small size, in far areas, don't need crane truck, like heavy oil-cooled SCR rectifier which is difficult and expensive.

3. What's special of Green Power rectifier

 -High quality, Europe level reliability with much cheaper price than Europe

 -Modular structure, compact size, light weight

 -Digital control, high accuracy for +15 years, fast responding time

 -Automatic self fault diagnose and display

 -Easy remote control, support 4-20mA/0-10V analog signal+dry contacts, communication RS485(MODBUS), Profibus DP, Profinet. 

 -Easy for maintenance and troubleshooting

 -Excellent workmanship

 -Local service in India, Germany, Chile, Russia, Iran, Korea, United Kingdom etc. countries  

 -Custom design available

4. Typical cathode protection types

 -50A 50V

 -100A 100V


5. Main specification

 -Input voltage: 3 phase 4 line, 220V, 380V, 415V, 480V

 -Input voltage protection range: +/-10%

 -Cooling method: Water cooling, forced air cooling, natural cooling

 -Power factor:>0.93

 -Efficiency: >92% at rated output

 -Regulation range: 0-100%

 -Duty cycle: 100% continuous running

 -Control mode: constant voltage, constant current

 -Accuracy: <1%

 -Ambient temperature: Max. 40℃

 -Elevation: <4000m