High Voltage AC & DC Pressure Testing

Certified High Voltage Pressure Testing for Cables and Equipment

We provide high voltage AC and DC pressure testing services across the UK. Our testing ensures cables, switchgear and insulation systems meet safety and performance standards before energisation.

Why Pressure Testing Matters

AC and DC pressure testing is used to confirm the electrical strength of insulation on high voltage systems. It helps detect faults, manufacturing defects or damage caused during installation.

Our services include:

High voltage AC withstand testing
DC pressure testing for HV cables
Pre-commissioning and post-repair testing
Controlled voltage ramp-up and monitoring
Testing for switchgear, transformers and joints

We use calibrated test equipment suitable for distribution and transmission level voltages.

Where It’s Used

High voltage pressure testing is carried out on new installations, upgrades and repaired systems. We support a wide range of industries and infrastructure projects with fast, safe testing services.

Suitable for:

HV cable circuits
Switchgear and terminations
Power transformers
Jointing and cable repairs
Renewable energy and industrial sites

All tests are documented and delivered with clear, signed reports for commissioning records.

Frequently Asked Questions

What is AC and DC pressure testing?

It involves applying a controlled high voltage to equipment or cables to confirm insulation strength and detect any weaknesses or defects.

Do you test both new and existing cables?

Yes. We test new cables before energisation and also assess repaired or aged systems to confirm continued safe operation.

All testing is carried out by trained engineers under strict safety procedures, using fully insulated and monitored equipment.

Do you provide formal test reports?

Yes. Each pressure test includes a full report with test parameters, results and confirmation of pass or fail status.