Bushing Current Transformers for Draw-Out Circuit Breakers
Epoxy-Cast Multi-Ratio Bushing CTs (BCTs)
About the Product
With a rated accuracy and burden of 0.3 B-0.9 (IEEE), these multi-ratio bushing current transformers (bushing CTs, or BCTs) are designed for draw-out circuit breakers and to be used with measuring (or monitoring) instruments or protective relays. Able to meet the requirements of 24 kV draw-out circuit breakers made by various manufacturers, these current transformers are cast in Araldite® epoxy resin and offer excellent moisture resistance, superior electrical performance, and high mechanical properties.
- Standards: IEEE, IEC
- Indoor application
- Epoxy cast
- System Voltage: ≤ 25.5 kV
- Frequency: 50 or 60 Hz
- AC/BIL: 60/125 kV
- Multi-ratio bushing CTs (BCTs)
- Ith = Max 25 kA/1S
- Compatibility with circuit breakers made by various manufacturers*
- Other Standards and Specifications available upon request.
* Compatibility with circuit breakers made by manufacturers of various countries, including in Japan, France, and Sweden, etc.
** Current ratios according to IEEE C57.13
HCB-2415, HCB-2415A, EBF-25M6, EBF-25M20, EBF-25MA6, EBF-25MA20
- Download Materials
Easy-to-print document, containing product description, specifications, and a selection table.
Download PDF for basic drawing(s) and dimensions of this product. For more detailed information, please contact CIC.
How to select, based on application and power system attributes, the primary and secondary currents, burden, accuracy, rated frequency, type (indoor vs. outdoor), insulation material, etc.
- Related Products
EO1M6, EO1M20, EO1M150
These epoxy-cast multi-ratio bushing current transformers (BCTs, or bushing CTs) are typically installed in 23 kV C-GIS (cubicle-type gas-insulated switchgear) for use with measuring or monitoring instruments, or protective relays.
Outdoor, ring-core (window-type) protective (or monitoring) current transformer for power companies or HV power systems. Converting high AC currents into signals to be received by the relay. Cycloaliphatic Epoxy.
Window-type (split-core), outdoor, protective (or monitoring) current transformer for power companies or HV power systems. Converting high AC currents into signals to be received by the relay. Cycloaliphatic Epoxy.
Suited to power transmission and distribution systems and intended to work with measuring or monitoring instruments, or with protective relays, these bushing CTs (BCTs) can also be used with GIS or in conjunction with power transformers bushings. Insulation tape or epoxy resin as insulation material.
When a power system is in operation, it is imperative that the secondary of the current transformer(s) should not have an open circuit. When an open circuit occurs, an extremely high transient voltage will be induced, which can in turn damage the current transformers and the instruments at the secondary, or even posing a threat to personal safety. This CT secondary overvoltage protector offers protection from such accidental damage caused by secondary transient voltage.