Overvoltage Protection Units

The Current Transformer Overvoltage Protection Unit (CTOP) consists of three identical voltage clamping circuits mounted on a printed circuit board. Each circuit is designed to clip the output voltage of an attached current transformer to a maximum of 400 V, in the event of a fault.


Protects hazardous areas

  • ATEX certified for use in hazardous areas


  • Bu Hasa Extraction Plant

    Replacement Zone 2 to Zone 1, Abu Dhabi

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  • Esso Petroleum Company Ltd

    Generator Overhaul, Southampton

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  • Abu Dhabi Gas Industries Ltd

    Partial Discharge Monitoring Contract, Abu Dhabi

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  • Kilroot Power Station

    2 pole generator - Major Inspections

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  • Rzeszow CHP Power Station

    Generator Major Overhaul, Poland

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  • Tongonan Geothermal Power Plant

    Stator re-conditioning and rotor rewind of Generator, Philippines

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Quartzteq GmbH
Bahnhofstrasse 3
CH – 5436 Würenlos