Power Testing ServicesWherever you are, whatever you do, Power Testing Ltd can provide the necessary back-up services. 

Power Testing Ltd has tailored its services to meet and exceed client expectations. Our years of experience put us at the forefront of our chosen industry sector. We pride ourselves on solving client problems and are known throughout the industry for our immediate reactive emergency services.

Parallel this with our excellent project management and planned works management we make excellent partners in servicing your electrical distribution system and ensuring your electrical supply.

Installation l Maintenance l Inspection l Testing l Other Services

Authorised Persons

Power Testing Ltd employ a number of fully trained Authorised persons who carry out all duties relating to the safe operation and running of our client high voltage / Low voltage systems/networks. These duties range from a full on site presence to daily requirements.

Power Testing Ltd are also capable of tailoring training courses for you and your staff. SAP Training includes safety from the system, safety documentation Permit to works, Sanction for test, switching schedules and operation of switchgear.

For clients with private networks we offer a Senior Authorised Person call out facility with a response time of between 2 to 4 Hours. Our SAPs will attend site and assist in determine cause of failure and restoration of supply. Power Testing Ltd are experts in this reactive problem solving giving you both peace of mind and confidence that your supplies are safe in our hands.

Cable Failure

Buried cables can, at any time, be subject to damage. Mechanical excavators are the most obvious but cables can also sustain damage from 'moles', trench-cutting machines, tunnelling rodents, even from someone driving in a tent peg! Damage sustained may not cause the cable to fail immediately - some cables have lasted a number of years after being damaged. Some cables may fail without having been damaged.

When a cable fails, someone, somewhere loses their electrical supply.

We can provide a cable fault location service that includes:

  • taking full control of electrical safety
  • pinpointing the position of the fault
  • excavation
  • repair of the cable
  • testing of the repaired cable and return to service
  • reinstatement of the ground service


Power Testing Ltd carry out all types of installation works associated with distribution networks from package substation installation feed pillar changes, control cabling and relay works through to the provision of high voltage ring-main systems and private networks, Grid transformers, network cabling and earthing/lightning protection.

Upon completion of all the installation works, we also undertake all necessary commissioning testing prior to energisation.


Power Testing Ltd have tailored our Maintenance reports to ensure all key parts are inspected and recorded allowing for tend a analysis and carried out by Power Testing Ltd is recorded on our equipment specific report sheets.

Our report sheets have been designed to meet and exceed manufacturers' recommendations for carrying out electrical maintenance in accordance with BS 6626.

All reports are entered onto our computer database and stored so that when required previous reports may be viewed within seconds.

We have staff trained and conversant with equipment ranging from distribution boards up to 132kV circuit breakers and maintain a library of manufacturers’ information regarding electrical distribution equipment. Indeed, many modification and repair circulars issued by manufacturers to our clients are passed on to us, as it is usually Power Testing Ltd. that will be carrying out any modifications or checks detailed in such circulars.

Although we cannot hold stocks of all spare parts that would be needed, we do however hold many useful items in stock and we have built up useful working relationships with companies specialising in the keeping and reconditioning of such spares. In this way, we can generally arrange for spares to be available on site at short notice.


Power Testing Ltd carries out for many of its existing clients regular substation inspections. This work consists of inspections of the tripping batteries and charger, visual inspection of all substation equipment, checking of the building security, testing of transformer insulating oil samples, and, where fitted, replacement of transformer desiccants. These inspections are designed to complement our preventative maintenance programme by highlighting potential problems. A fully computerised records and reporting system is used for inspection activities.

Hazardous Area Inspection

Power Testing Ltd has extensive experience carrying out visual, Close and detailed inspection of hazardous area equipment.

Or full-time dedicated team of inspectors, specialising in the inspection of electrical power equipment installations with emphasis on BSEN 60079, (electrical equipment in hazardous areas).

These inspections are designed to complement our preventative maintenance programme by highlighting potential problems. A fully computerised records and reporting system is used for inspection activities.


Power Testing Ltd offer a full commissioning service. This facility is complemented by our range of other testing services available, which include the following:

  • Cable Fault Location
  • Pressure Testing equipment and cables both using A.C. and D.C. test sets.
  • Protection Testing - both primary and secondary
  • Earth Installation Testing - in accordance with BS 7430 (without disconnection)
  • Power Factor Correction Equipment Testing and installation

Other Services

  • Harmonics Surveys
  • Thermo graphic Surveys
  • Lightning Protection to BS 6651
  • Power Quality analysis to EN50160 standards
  • HV Cable indentifying and spiking
  • Grading Surveys
  • Operation and Maintenance Contracts
  • Private Network Contracts
  • Cable Jointing
  • Emergency Call Out Facility