Cathode Protection Rectifier

Cathodic Protection Systems Mitigate Corrosion

cathode protection rectifierThe cathode protection rectifier is an electrical device that converts AC, or alternating current, which periodically reverses direction, to DC, or direct current. It then flows in only one direction in order to mitigate corrosion and ensure the safe, efficient working conditions.

Cathodic protection systems provide impressed current cathodic protection, but in order to perform efficiently, they require regular maintenance and monitoring. Because the main job of the switch mode rectifier circuit is to mitigate corrosion and preserve metallic structures that lead to a sustainable source of electricity, it will need to be in a constant state of operation. Knowing how these systems work will ensure they are used properly.


Need a cathode protection rectifier? Call us at 1-772-646-0597 or request pricing.

How to Use a Cathode Protection Rectifier

In the energy industry, protecting buried pipelines or metal structures from corrosion and keeping a safe working environment is necessary. A cathodic protection rectifier could be connected to a buried pipe to keep it safe from corrosion by applying a low voltage DC bias. Other safety grounding systems, like a mitigation wire, connected to the pipe might compromise the way the cathodic protection rectifier works. This is where a solid-state decoupling device comes in.

Using a solid-state decoupling device is used to isolate the grounding system in place and the pipeline to make sure the cathodic protection system is working efficiently and can be normally maintained. Knowing how a cathodic protection rectifier system works and how to ensure it's working properly will keep working conditions safe. These systems have various features and benefits that add to their usefulness.

Cathode Protection Rectifier Features and Benefits

Cathode protection rectifiers are known for their small size, low weight, and increased efficiency and performance. Their intelligently designed internal features also lend to their increased speed and efficiency.

Three major parts of a rectifier:

  • Switch Mode Power Unit
  • 4MC Controller
  • Cabinet

Other parts of a cathodic protection system are circuit breakers, voltage and current output meters, lightning arrestors, surge suppressors, transformer tap bars, and fuses. Switch mode rectifier circuits come in three standard enclosure sizes depending on the power output. Standard enclosures are made from stainless steel that is resistant to mild corrosion, wet abrasion, and is easy to weld and punch.

cathodic protection systemSwitch mode rectifier circuits have several benefits other than their small size, low weight, and intelligent design. They also offer single phase, lower power consumption and are made with less copper, which make them less susceptible to theft.

Other benefits:

  • Output DC ripple is less than 200mV
  • Lower carbon footprint
  • Integrated remote monitoring
  • Lower cost and higher efficiency

The Importance of Cathode Protection Rectifier Maintenance

Routine maintenance and monitoring of a cathode protection rectifier are recommended practices when installing and using them. The major causes of switch mode rectifier circuit breakdown are a failure to properly maintain it. Other major causes of cathode protection rectifier failure are neglect, age, and lightning strikes. Some even opt for remote monitoring systems where one supplier is available for spares, maintenance, and repairs. Monitoring will require visual inspection and electrical testing.

As cathode protection rectifiers are electrical devices, they will be susceptible to power surges. Lightning strikes, improper maintenance, and failure to monitor the cathodic protection system will undoubtedly lead to premature system failure and a reduction in the life of your cathode protection rectifier. With their increased efficiency, these switch mode rectifier circuits put out less heat than traditional transformer models, making them efficient for hotter climates. Using these in conjunction with a solid-state decoupling device will ensure the cathodic protection rectifier is in prime working condition.

Do you need protection against high voltage? See our Solid-State Decoupler.

Questions about cathode protection rectifiers? Call GEI Works at 1-772-646-0597 or fill out our quote request form to discuss your requirements.