Does Current Transformer become the tamer and safety guardian of high-voltage current?
Publish Time: 2024-10-15
The Current Transformer uses the principle of electromagnetic induction in the power system to safely and effectively convert high-voltage and high-current signals into low-voltage and low-current signals.
Conversion process
The Current Transformer is usually composed of an iron core and windings, including a primary winding and a secondary winding. In the power system, high-voltage and high-current flows directly through the primary winding, while the secondary winding is closely connected to the measuring equipment and protection circuit. When a high-voltage and high-current passes through the primary winding, it generates a strong magnetic field, which is induced on the secondary winding, thereby generating a current in the secondary winding that is proportional to the primary current but smaller in value. Since the number of turns of the secondary winding is usually more than that of the primary winding, the induced small current is proportional to the original large current, but its absolute value is much smaller.
The importance of safety monitoring
Simplify measurement and protection circuits: By standardizing current, Current Transformer simplifies measuring instruments and protection circuits, reduces costs, and facilitates installation. This allows power system operators to monitor and control current more easily, thereby improving the reliability and safety of the power system.
Isolate high voltage and protect equipment and personnel: Current Transformer isolates high voltage and high current from low voltage measurement circuits through magnetic connections, thereby protecting the safety of measurement equipment and operators. This reduces the risk of short circuits, electric shocks, etc. that may be caused by direct contact with high voltage currents.
Real-time monitoring and fault diagnosis: Current Transformer can monitor current changes in the power system in real time, providing key information for operators. When a fault occurs in the power system, such as overload, short circuit, etc., Current Transformer can quickly detect abnormal current and trigger the protection device to cut off the fault circuit, thereby protecting the safety of the power system.
Improve power quality: Current Transformer can also be used to monitor parameters such as current waveforms, harmonics, asymmetry, transient processes, and current fluctuations and flickers. These parameters are crucial for evaluating power quality. By monitoring these parameters, Current Transformer can help operators understand the operating status of the power system, promptly detect and deal with potential safety hazards, and thus improve power quality.
In summary, Current Transformer is of great significance in realizing the conversion process of high-voltage and high-current signals to low-voltage and low-current signals in the power system. It not only simplifies the measurement and protection circuits and reduces costs, but also isolates the high voltage and protects the safety of equipment and personnel. At the same time, through real-time monitoring and fault diagnosis functions, Current Transformer provides strong support for the safety monitoring of the power system.
