📢 Recently we had the pleasure of welcoming our summer's clients to our factory. It was a wonderful opportunity to exchange ideas and strengthen our international partnerships. Here's to many more successful collaborations in the future~✨ 🌏


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SZDEHENG is honor join in Sensor Shenzhen March 31st April 2nd,2025.

At booth 8B215 to show what's new and learn about our extensive collection of current sensor for home appliance testing and protection products.

Deheng Technology wins the trust of customers with technology and service, and wins development and progress with quality and efficiency


Exhibition Add:Shenzhen Futian Convention and Exhibition Center Halls 7 and 8


MP/Whatsapp:+86 18118747062

Website:www.szdeheng.com


Show the most innovative sensor technology showcase at Sensor Shenzhen from March 31st to April 2nd, 2025

Current Transformers (CTs) play a crucial role in monitoring and transforming electrical currents safely for various applications, including metering and protective relays. By stepping down high input currents to manageable levels, CTs ensure safe operation, isolate high voltage, and allow for grounding of secondary circuits. Understanding key characteristics such as CT ratio, polarity, and accuracy class is essential for selecting the right transformer for your needs, enhancing safety and efficiency in electrical systems.

At present, most of the small current grounding line selection components in the project are selected according to the protection level. When the measured current transformer is far less than the rated current value, the comprehensive error is difficult to meet the requirements. The total error of the two-stage current conversion component is the main cause of misjudgment on the site. the reason. The linear measurement range of the zero-sequence current transformer used in engineering practice exceeds the actual ground capacitance current.

The role of the current transformer In order to ensure the safe and economic operation of the power system, the operation of the power equipment must be monitored and measured. However, the general measurement and protection device cannot directly access the high-voltage equipment, but the large current of the primary system needs to be proportional. Transform into a small current and supply it to the measuring instrument and protection device.

The current transformer is used in an AC loop where the direction of the current changes over time. The polarity of the current transformer means that the polarity of the primary side is the same as the polarity of one end of the secondary side at a certain moment, that is, it is positive at the same time or negative at the same time, and the polarity is called the same polarity end or the same name end. The symbol "*", "-" or "." indicates. (It can also be understood as the direction relationship between primary current and secondary current).