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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.

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.