RCT Type Current Transformer

Toroidal current transformer RCT model, is renowned for its exceptional performance in accurate current measurement. With a measurement range of 30A to 3000A, it is widely utilized across various applications and industries.

One of the key advantages of the RCT is its toroidal design. Unlike traditional square transformers, the toroidal shape provides a compact and efficient magnetic path, resulting in improved accuracy and reduced measurement errors. The absence of air gaps in the core and the tightly wound windings minimize leakage flux, ensuring precise and reliable current measurement.

The RCT toroidal current transformer transformer finds extensive use in power systems, energy management applications, industrial monitoring, and more. It plays a crucial role in power distribution, load monitoring, equipment protection, and energy efficiency analysis. Its compact size and superior performance make it suitable for installations with limited space.

HEYI ELECTRICAL, a professional current transformer producer, is known for its expertise and commitment to quality. They adhere to stringent manufacturing standards, ensuring that their transformers meet the highest industry requirements. With a focus on customer satisfaction, HEYI ELECTRICAL offers customized solutions and exceptional technical support to meet the unique needs of their clients.

In summary, the RCT toroidal current transformer, manufactured by HEYI ELECTRICAL, offers accurate current measurement within the range of 30A to 3000A. Its toroidal design, superior performance, and adaptability to various applications make it a reliable choice for precise current measurement needs in diverse industries.


  • Safe, easy to install, portable.
  • Wide inner window, allowing clamping of big cables or bus-bars.
  • Wide range of sizes to accommodate all the existing installations.


  • Current measurement, monitoring and piotection for electrical wiring and equipment.
  • Current and power measurement for electric motors, lighting, air compressor, heating and ventilation system,air-condition equipment and automation-control system.
  • Current, power and energy monitoring device.
  • Relay protection device.

Toroidal current transformer are specifically designed to measure electrical current in a precise and efficient manner. They utilize a toroidal (ring-shaped) core made of high-permeability material, which allows for accurate current sensing with minimal leakage and stray magnetic fields.

One key advantage of toroidal current transformer is their compact size and weight compared to traditional transformers. The toroidal core design offers better magnetic coupling, resulting in higher accuracy and improved linearity over a wide range of currents. Additionally, the absence of air gaps and the tightly wound windings contribute to lower losses and enhanced performance.

Toroidal current transformer are commonly used in electrical power systems, energy monitoring, industrial automation, and renewable energy applications. They play a crucial role in current measurement, metering, protection, and control of electrical circuits. HEYI ELECTRICAL, a reputable manufacturer of toroidal current transformers, offers reliable and customized solutions to meet diverse customer requirements. Their products are known for their high accuracy, robust construction, and excellent performance in demanding environments.

Model Primary / Secondary Busbar Hole Dimensions(mm) Rated Burden (VA) Accuracy Class Rated Voltage
RCT-35 30/5A~300/5A φ=35mm 1.5~10 0.5 / 1.0 0.72KV(AC)
RCT-58 300/5A~1200/5A φ=58mm 2.5~15 0.5 / 1.0 0.72KV(AC)
RCT-90 800/5A~1600/5A φ=90mm 5~15 0.5 / 1.0 0.72KV(AC)
RCT-110 1000/5A~3000/5A φ=110mm 10~20 0.5 / 1.0 0.72KV(AC)
RCT-130 2000/5A~6000/5A φ=130mm 20~30 0.5/ 1.0 0.72KV(AC)
Electrical Parameter Mechanical Parameter
Frequency 50/60Hz Case PC/UL94-V0
Rated Input 1A-5000A Bobbin PBT
Measuring range 5%In-120%In Core Silicon steel
Rated Output 1A,5A Construction Screw
Ratio Voltage 0.72KV (AC) Operating Temp -25℃~+75℃
Dielectric strength 3.0KV/1mA/1min Operating Humidity ≤85%
Insulation Resistance DC500V/100MΩ min Output Connection Terminal
Type Ratio(A) Burden(VA) Frequency(Hz)
class:0.5 class:1.0
RCT-25 50/5A 2.5(2T) 50/60
60/5A 2.5(2T) 50/60
75/5A 2.5(2T) 1.5 50/60
100/5A 1.5 2.5 50/60
Type Ratio(A) Burden(VA) Frequency(Hz)
class:0.5 class:1.0
RCT-35 30/5A 50/60
50/5A 2.5(2T) 50/60
60/5A 2.5(2T) 50/60
80/5A 1.5 50/60
100/5A 1.5 2.5 50/60
120/5A 2.5 3.75 50/60
150/5A 2.5 3.75 50/60
200/5A 3.75 5 50/60
250/5A 3.75 5 50/60
300/5A 5 10 50/60
Type Ratio(A) Burden(VA) Frequency(Hz)
class:0.5 class:1.0
RCT-60 300/5A 2.5 5 50/60
400/5A 5 5 50/60
500/5A 5 7.5 50/60
600/5A 5 7.5 50/60
800/5A 5 7.5 50/60
1000/5A 10 15 50/60
1200/5A 10 15 50/60
Type Ratio(A) Burden(VA) Frequency(Hz)
class:0.5 class:1.0
RCT-90 800/5A 5 10 50/60
1000/5A 10 15 50/60
1200/5A 10 15 50/60
1500/5A 10 15 50/60
1600/5A 10 15 50/60
Type Ratio(A) Burden(VA) Frequency(Hz)
class:0.5 class:1.0
RCT-110 1000/5A 10 15 50/60
1200/5A 10 15 50/60
1500/5A 15 20 50/60
1600/5A 15 20 50/60
2000/5A 15 20 50/60
2500/5A 15 20 50/60
3000/5A 15 20 50/60


RCT Type Current Transformer-heyi


RCT Type Current Transformer-heyi


RCT Type Current Transformer-heyi


RCT Type Current Transformer-heyi


RCT Type Current Transformer-heyi
RCT Type Current Transformer-heyi
RCT Type Current Transformer-heyi

    contact us

    24Hs online service   365Ds NON-Stop Production   20Ys Professional Manufacturers Professional designer and manufacturer of current transformer,cooperated with Siemens ,schneider Fuji electrical softbank LG samdsung.
    Company HEYI Electrical CO.,LTD Contact person Bethy
    Tel 86-13968747975 E-mail bethy@heyiele.com
    ADD Xinguang Ind.Zone, Liushi Town, Wenzhou, Zhejiang, China


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