How to Install a current transformer?  The secondary circuit conductors or cables should all be make of copper wires. The cross-section of the current transformer circuit conductor should not be less than 2.5mm2, and the cross-section of the voltage transformer circuit conductor should not be less than 1.5mm2. The first terminal block at the current […]

What is a Current Transformer? The current transformers is an instrument that converts the primary side large current into the secondary side small current for measurement based on the principle of electromagnetic induction. The current transformer is compose of a closed iron core and a winding. Its primary side winding has few turns and is […]

What are the advantages of AC and DC leakage current transformers? High precision: Moreover, the leakage current sensor can provide accurate measurement at the sub-milliampere level, with an error of typically less than 1%. Wide range: Additionally, it can measure a broad spectrum of leakage currents from microamperes to milliamperes without requiring complex preamplification or […]

Principle of AC and DC leakage current transformer？  The AC/DC leakage current sensor is a key device that focuses on real-time monitoring of the insulation of AC and DC power supply systems. Based on the electromagnetic isolation and magnetic modulation principles of the transformer, it can effectively convert the measured AC microcurrent and DC microcurrent […]

What is the function of current transformer? 1) The biggest function of the current transformer is to adjust the current size. In reality, the output current values ​​of most electrical equipment and transmission lines are very large, but the current value that the instrument used to measure the current can withstand is relatively small. Therefore, […]

Characteristics of leakage current transformers    Leakage current transformers are essential components in safety protection systems, comprised of detection elements, intermediate mechanisms, actuators, and self-checking devices. The core function of a leakage current transformer lies in its detection element, which captures and amplifies the leakage current signal, facilitating the activation of the actuator to initiate […]

Where are HEYI’s AC DC leakage current sensor use in the tram industry?  AC DC leakage current sensor serve as fundamental safety components within the electric vehicle (EV) sector, playing a pivotal role in mitigating potential hazards associated with electrical systems. In essence, AC DC leakage current sensors are essential guardians, diligently monitoring and managing […]

The impact of residual current transformers on the tram industry   When talking about the impact of residual current transformers in the tram industry, their role in system safety, stability and environmental protection cannot be ignore. First, these transformers improve the safety of the tram system. By monitoring the residual current in the circuit, they […]

What is a current transformer? A current transformer (CT) functions as a vital instrument in electrical systems, converting high currents into proportional, lower currents through a specified transformation ratio. Operating much like a traditional transformer, the CT diverges in its primary purpose, focusing on current modification rather than voltage alteration. Originally termed a ‘converter’, its […]

Principle of current transformer？

The difference between Rogowski coil and ordinary current transformer？   Rogowski coils, also referred to as ROGWSKI COIL, are flexible, hollow, and deformable, lacking an iron core. They operate on the fundamental principles of Faraday’s law of electromagnetic induction, directly generating voltage signals across their secondary winding. One primary advantage of Rogowski coils over conventional […]

2024 HEYI Electrical passed the Factory Audit by “V-Trust” Our fluxgate residual current sensor HYCA series specifically designed for EV charging stations, can replaces KEMET brand sensor. Now we have supplied to a big company in Europe of our HYCA products in bulk for the Project: EVP and Project: EVC200 and so on. In order to […]