Protection Transformers

Ring-Type Protection

We design and manufacture protection ring-type current transformers to meet the specific requirements of our customers. Example sectors include leading switchgear manufacturers and utility companies throughout the world.

We design and manufacture to cover current British, EU and Worldwide standards and can also meet specific customer specifications upon request. Other International standards can be supplied to, contact us stating your required standard and we will be pleased to supply a quotation.

We carry a large range of materials that allows us to provide quick deliveries, and also hold a standard range of current transformers (see below) in stock ready for despatch allowing us to respond quickly to your requirement.

Available Extras

Please specify when ordering.
  • Terminal cover
  • Flying leads
  • M6 Terminal Screws
  • High Voltage Insulation Tube
  • Mounting Feet
  • Busbar Mounting Bracket
  • Ratios: From 50/5A
  • Burdens: From 1.0VA
  • Classes: From 5P5, Class PX and Class X

For quick delivery, material for the following ranges are always in stock:

Range Min I/D (mm) Min O/D (mm) Ratios VA Class
M1268275/5 - 250/52.5 - 10.05P5,5P10,10P10
M243104150/5 - 800/55.0 - 15.05P5,5P10,10P10
M358119300/5 - 1500/55.0 - 15.05P5,5P10,10P10
M476123500/5 - 2000/55.0 -15.05P5,5P10,10P10
M5110170800/5 - 3000/55.0 - 15.05P5,5P10,10P10
M61311891000/5 - 4000/55.0 - 15.05P5,5P10,10P10

Note: If your required CT is not listed, we may still be able to meet your demands. Please contact us using the enquiry form here with your specific requirements and we'll investigate.