Onsite Witness Testing

Cost-Effective, High-Quality Components

G99 & G100

DNO Witness Testing

When you purchase a G99 or G100 Export Limitation Panel from us you will more than likely need an onsite Test or DNO Witness Testing. We can provide one of our highly experienced Test Engineers who cover all corners of the United Kingdom. Wherever you are, we can help!

We can, in certain cases, even test Relays that have not been supplied by us where the Generating Equipment may already have a Relay inbuilt, typically on CHP Plants and Wind Turbines.

We have worked with most of the DNO Protection Engineer’s throughout the UK now and they are familiar with our Senior Test Engineer. We are also familiar with what is expected to be seen onsite to ensure a smooth testing procedure and successful sign off. Get in touch to see how we can help with your G99 witness testing.

What We Offer

We can work on the majority of G99 Relay’s available including:

  • ComAp

  • ABB

  • Megacon

  • Woodward

  • DIEF

  • Siemens

  • Micom

Unmatched Experience

Experts In our industry

With Export Limitation becoming increasingly popular, we can also carry out the Witness Testing for this for your DNO. We have a Current Injection Test Set that can prove trip points and times so that your DNO can see the system manipulated to real limits. This is far more in depth than a type tested device.

Our extensive experience in the G99 Testing ranges from battery storage and commercial rooftop solar PV to large ground mounted solar PV parks, CHP plants, Wind Turbines and much more! This means that you can have full confidence in a successful G99 Witness Test.

On successful completion of your test, we will provide you with the relevant certificates signed by our engineer and the DNO representative.