How does a current transformer work?

LVZW-35 current transformer produced by Shaanxi West Power Tongzhong Electrical Co., Ltd. is a sensor used to measure large current in 35kV system. It is mainly used in substations, power systems and electrical equipment. The transformer adopts magnetic core type, which is characterized by high linearity, strong anti-interference ability, small size and simple structure. It is a current transformer with very high cost performance.

LVZW-35 current transformer has many Advantages:

1. Safe and reliable:

Electrical isolation: The current transformer can effectively isolate the primary circuit of high voltage and high current from the secondary measurement and protection circuit of low voltage and low current, avoiding direct contact of operators with high voltage current, greatly reducing the risk of electric shock, and ensuring the safety of personnel.

Strong anti-interference: Its working principle is based on electromagnetic induction, which will not affect and interfere with the measured circuit, ensuring the accuracy and reliability of the measurement results, and can work stably in a complex electrical environment, providing a strong guarantee for the safe operation of the power system.

2. High measurement accuracy: The output signal accuracy can reach 0.5, 0.2 or even higher, which can meet the application occasions with high requirements for current signal accuracy. Whether in the normal operation state of the power system or in the transient process when a fault occurs, the current can be accurately measured to provide accurate data support for relay protection, metering, monitoring, etc.

3. Wide measurement range: It can be applied to different voltage and current levels, and can meet the needs of various power systems and industrial application scenarios. Modern current transformers usually have a multi-speed adjustable measurement range. By adjusting the transformer ratio, it can adapt to current measurements of different sizes, and has strong versatility and flexibility.

4. Small size and light weight: Made of insulating materials and fine wires, it has a compact overall structure, small size, light weight, and is easy to install and maintain. In electrical equipment with limited space, such as switch cabinets, distribution boxes, etc., current transformers can be easily installed without bringing too much burden to the equipment or taking up too much space.

5. Good dynamic performance: It can respond to current changes quickly and accurately, has good frequency response and dynamic characteristics, and is suitable for application scenarios with a large current change range and high waveform requirements, such as short-circuit fault detection and protection in power systems. When a short-circuit fault occurs, the current transformer can quickly and accurately reflect the size and change of the fault current, providing a reliable signal for the rapid action of the protection device.