HVIsolThe Transformer & Electrical company have over 60 years experience in the design and manufacture of high voltage (stand off) transformers

We can design and build transformers capable of isolating up to 140 kV dc secondary to earth.

Transformers are generally built as air or oil insulated, dependent upon withstand voltage and dimensional restrictions.

Transformer shown: Typical Valve transformer 6.4 volts output 40 kV dc isolated.



  TEC Products 


CL DgreyL outline 4ptv2

The Claude Lyons Group
2 Tower House, Hoddesdon, Herts, EN11 8UR, England
Spares are obtainable from who are stockists of surplus Claude Lyons units and spares .

E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

Company registered in England No 222791
Registered office as above

VAT Reg No. GB 213 5042 15


UK Established Since 1918

The Claude Lyons Group was founded in the UK in 1918 and is still in private ownership. Since our early days we have been innovators in areas related to voltage and power control and more recently in energy saving and harmonic mitigation. Operating as a global exporter with many years experience we can justifiably call ourselves a world leader in the field of voltage stabilisers, power conditioning and uninterruptible power supplies (UPS)