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RI-CBCT Series Toroid Circular Core Balanced Current Transformers


  • Compact design (shallow depth)
  • Available in many common aperture sizes (35…310mm)
  • Single and Three Phase system compatible
  • Surface mounted using integral moulded fixing feet
  • Designed to detect residual leakage current in earth leakage applications
  • High sensitivity and accurate


The RI-CBCT are a range of core balanced current transformers. These transformers are designed to detect and transmit a proportional signal to the RI-ELR range of earth leakage protection relays. The transformers are housed in robust Polycarbonate self extinguishing cases, providing excellent insulation and mechanical strength.

Five versions are available with cable apertures of 35mm, 70mm, 120mm, 210mm and 310mm diameter. All models are provided with base mounting fixing feet.

Current Transformer Type : Closed Toroid Core Balanced
Transformation ratio 1000:1

Additional Information

Manufacturer Rayleigh Instruments
Product Name / Options Price (ex VAT)
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