Cathodic Protection Switching Power Supply

This is an advanced, low-consumption switching power supply that delivers a stable protective current for corrosion-protection (cathodic protection) systems. Operating in both constant-voltage (CV) and constant-current (CC) modes, it allows precise adjustment of the output and reliable, continuous control of the protection process.

Constant-voltage / constant-current output characteristic animation
Output characteristic: the supply holds the voltage steady as the load changes (CV region), and once the current limit is reached it holds the current steady (CC region) — delivering a precise, controlled protective current.

How does it work?

Cathodic protection stops corrosion by pushing a controlled DC current onto the metal structure. A quality power supply does this precisely and continuously:

  • CV / CC regulation: it automatically switches between constant-voltage and constant-current operation, so the protective current stays correct even as soil resistance, moisture and temperature change.
  • Pipe-to-Soil Potential: the output is set and monitored against the pipe-to-soil potential — the true measure of whether the structure is properly protected.
  • Full protection suite: built-in OCP, OVP, SCP and OTP guard the unit and the installation against fault conditions.
  • Switching efficiency: the switching design keeps losses and heat low — important for equipment that runs 24/7 for years.

What goes wrong without a proper power supply?

Using an unsuitable or low-grade unit for cathodic protection is a costly mistake with long-term consequences:

  • Under-protection: too little current leaves the structure unprotected, so corrosion continues and the pipeline or tank eventually fails.
  • Over-protection: too much current causes coating disbondment, hydrogen embrittlement of the steel and wasted energy.
  • Unstable or high-ripple output: makes the protection inconsistent and can interfere with nearby buried structures.
  • No accurate control or monitoring: the correct pipe-to-soil potential can’t be held as ground conditions change.
  • Low efficiency: because the system runs continuously for decades, poor efficiency means a heavy, permanent energy cost.

Technical specifications

  • Output range: 0–30 V DC and 0–30 A
  • Rated power: 900 W
  • Pipe-to-Soil Potential measurement
  • Protections: OCP, OVP, SCP and OTP
  • Compact design, high efficiency and reliability suited to industrial, continuous use

Where is it used?

  • Oil, gas and water pipelines
  • Buried tanks and storage facilities
  • Marine and offshore structures
  • Refineries and petrochemical industries

Why buy from Keyhan Energy?

Keyhan Energy supplies this power supply with technical support and pre-purchase consultation, so you choose exactly the right unit for your protection system. Contact us for a quote and technical guidance.

Cathodic protection switching power supply

This product is a switching power supply that is advanced and energy-efficient, delivering a stable protection current for Corrosion protection (cathodic protection) systems. Operating in two modes, Constant voltage (CV) and Constant current (CC), it allows precise adjustment of the output and reliable, continuous control of the protection process.

Animation of the constant-voltage / constant-current output characteristic
Output characteristic: the power supply holds the voltage constant against load changes (CV region) and, as soon as the current limit is reached, holds the current constant (CC region) — meaning a precise, controlled protection current.

How the product works

Cathodic protection stops corrosion by applying a controlled DC current to the metal structure. A quality power supply does this precisely and continuously:

  • CV/CC regulation: automatically switches between constant-voltage and constant-current modes so that the protective current stays within the required range even as soil resistivity, moisture and temperature change.
  • Pipe-to-soil potential: The output is set and monitored based on pipe-to-soil potential — the criterion for assessing protection status.
  • Full set of protections: Built-in OCP, OVP, SCP and OTP protections guard the unit and the installation against fault conditions.
  • Switching efficiency: The switching design keeps losses and heat low — an important point for equipment that runs around the clock for years.

Consequences of choosing the wrong power supply

Using an unsuitable or low-grade unit for cathodic protection is a costly mistake with long-term consequences:

  • Under-protection: Too little current leaves the structure unprotected; corrosion continues and eventually the pipe or tank leaks and fails.
  • Over-protection: Excess current causes coating disbondment, hydrogen embrittlement of the steel and wasted energy.
  • Unstable or high-ripple output: throws protection out of balance and can affect adjacent buried structures (stray current).
  • No precise control and monitoring: As ground conditions change, the correct pipe-to-soil potential is not maintained.
  • Low efficiency: Because the system runs continuously for decades, low efficiency increases the ongoing energy cost.

Technical specifications

  • Output range: 0 to 30 V DC and 0 to 30 A
  • Rated power: 900 W
  • Pipe-to-soil potential measurement
  • Equipped with OCP, OVP, SCP and OTP protection
  • Compact design, high efficiency and reliability suited to industrial, continuous operation

Applications

  • Oil, gas and water pipelines
  • Buried tanks and storage facilities
  • Marine and offshore structures
  • Refineries and petrochemical industries

Technical consultation and support

Keyhan Energy offers this power supply with technical support and pre-purchase consultation so you choose exactly the right unit for your protection system. Contact us for a quote and technical guidance.

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