Publish Time: 2025-02-21 Origin: Site
Three - phase Rogowski coils with 5A output are widely applied in power systems and industrial production, mainly in the following aspects:
Power Monitoring and Metering
Precise Power Measurement: These coils are utilized in power meters to accurately measure three - phase active power, reactive power, and apparent power. Their 5A output is compatible with standard power meter inputs, allowing for precise calculation of power consumption, which is vital for billing and energy management.
Grid - Connected Power Monitoring: In distributed generation systems like photovoltaic and wind power, they monitor the three - phase power output. This ensures accurate measurement of the power fed into the grid, crucial for grid - connected operation and energy settlement.
Electrical Equipment Protection
Overcurrent Protection: Acting as current sensors in relay protection devices, they continuously monitor the three - phase current. Once the current exceeds a set value, the protection device is activated to quickly cut off the circuit, safeguarding electrical equipment such as transformers, motors, and generators from overcurrent damage.
Differential Protection: In large - capacity electrical equipment and power transmission lines, differential protection based on Rogowski coils compares the current differences at both ends of the protected equipment or line. This can rapidly detect internal faults and enhance the reliability and selectivity of protection.
Power Quality Analysis
Harmonic Detection: They can accurately measure three - phase current waveforms, assisting in detecting and analyzing harmonics in the power grid. Harmonic analysis is essential for evaluating power quality and ensuring the normal operation of sensitive electrical equipment.
Voltage Sag and Swell Monitoring: By monitoring the three - phase current changes, they help detect voltage sags and swells. This information is valuable for assessing the impact of power grid disturbances on electrical equipment and implementing corresponding mitigation measures.
Industrial Automation and Process Control
Motor Current Monitoring: In industrial production lines, they monitor the three - phase current of motors to detect abnormal operating conditions such as motor overload, under - load, and phase - loss. This enables timely maintenance and protects the normal operation of the production line.
Process Parameter Monitoring: In some industrial processes, the three - phase current is related to process parameters. Monitoring the current enables indirect monitoring and control of process parameters, ensuring the stability and quality of the production process.