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High Voltage Electrical Engineers

Specialist Services / Testing & Commissioning

All electrical distribution systems must be tested during their operational life, initially during installation and final commissioning, and thereafter on a routine basis as part of a regular maintenance programme, or after prolonged periods of disuse.

These tests will ensure not only that the installation operates as designed, but that all modes of standby equipment and protection systems are fully functional when required.

EMP Ltd offer clients a fully tested, fully certified system. Most importantly, all supporting calculations and supplementary data schedules are issued, which in the event of catastrophic equipment failure and/or damage to property, forms essential documentation that can be submitted to insurance companies on demand.

The testing and commissioning of high voltage electrical equipment is a highly specialised activity requiring every installation being tested by a trained engineer to exacting standards.
EMP Ltd testing capability covers an extensive range of disciplines:
  • Cable installations
  • 1kV and 5kV Insulation tests
  • DC pressure tests up to 33kV
  • VLF cable testing
  •  Transformers
  • HV & LV winding Insulation tests
  • Winding ratio checks
  • Bucholz testing
  • Oil sample and testing (electrical breakdown, acidity, water & PCB content, Dissolved gas analysis)
  • Switchgear
  • AC pressure testing
  • Ductor testing
  • CT’s – Ratio & flick tests, Mag curves
  • VT’s – Ratio & polarity checks
  • Functionality checks


  • Protection testing
  • Protection
  • Primary and secondary injection
  • Timing tests
  • Overcurrent and earth fault relays
  • Directional Overcurrent and earth fault relays
  • Differential transformer protection
  • Translay and Solkor feeder unit protection
  • Restricted and standby earth fault relays
  • Generator loss of mains and G59 protection
  • Neutral voltage displacement
  • Transformer auto tapping relays
  • Intertripping schemes
  • Earthing
  • Soil resistivity measurements
  • Final earth electrode resistance.


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ELECTRICAL MECHANICAL PROJECTS LTD.
High Voltage Electrical Engineers
17 Strait Lane  |  Ainthorpe  |  Danby  |  Near Whitby  |  N. Yorks  YO21 2JZ


T 01287 660856
F 01287 660856
E [email protected]

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  • Home
  • Services
    • Installation Specialists
    • 247 Emergency Response
    • Specialist Services / Testing & Commissioning
    • Maintenance & Annual Inspections
  • Contact Us