Advanced High Frequency Partial Discharge Current Sensor for Cable Condition Monitoring

When partial discharge occurs inside a cable, high-frequency current signals can travel through the grounding path. The High Frequency Partial Discharge Current Sensor is designed to detect these signals by being installed on the ground cable, providing a non-invasive solution for local discharge monitoring. Using a Roche coil working mode, the sensor has no electrical connection between the measurement loop and the measured current, allowing detection without shutting down the tested equipment.

Reliable Solution for Partial Discharge Detection

Partial discharge is an important indicator of cable insulation conditions. During operation, discharge activity inside cables can generate high-frequency current signals that propagate along the grounding wire. Detecting these signals helps monitoring systems collect valuable information about cable conditions.

The High Frequency Partial Discharge Current Sensor is designed for this detection process. It combines a partial discharge sensor and sheath circulation sensor into one integrated structure, providing a practical sensing solution for high-frequency current signal acquisition.

The sensor adopts a non-invasive measurement method. Since there is no direct electrical connection between the sensor circuit and the measured current, it can be applied without interrupting normal equipment operation.

High-Speed Response and Wide Frequency Range

Fast response performance is one of the key characteristics of this sensor. The product supports response speeds up to nanosecond level, making it suitable for capturing rapidly changing high-frequency signals generated by partial discharge.

The sensor provides a wide operating frequency range of 0.3MHz–100MHz. This broad frequency capability allows it to detect high-frequency current signals in cable monitoring applications.

The product also features good linearity and high precision. The technical parameters specify measurement accuracy of ±0.5%, providing a reference for evaluating signal detection performance.

Integrated Structure and Stable Performance

The High Frequency Partial Discharge Current Sensor integrates local discharge detection and sheath circulation sensing functions.

The sensor uses a Roche coil working mode, which separates the measurement circuit from the monitored current. This structure helps improve installation flexibility while maintaining safe signal acquisition.

The product features high magnetic sensitivity and stable signal response. According to the supplied technical information, the sensor uses a design suitable for high-frequency current detection and provides strong anti-electromagnetic interference capability.

Technical Specifications

The main technical parameters of the sensor include:

• Operating frequency range: 0.3MHz–100MHz 
• Measuring range: 0.1A–1KA 
• Sensitivity: 0.1pc 
• Rated output: 500mV/1000A 50Hz 
• Transmission impedance: 15mv/mA 
• Matched impedance: 50Ω 
• Measurement accuracy: ±0.5% 
• Position sensitivity value: ±1.5% 
• Protection class: IP68 
• Operating temperature: -40℃ to 70℃ 
• Storage temperature: -40℃ to 100℃ 
• Output interface: 5-meter line with corrugated sleeve, BNC connector for local discharge, M12 aviation plug for circulation sensor 

These parameters provide the basic technical references for selecting the sensor according to the requirements of different monitoring systems.

Applications in Cable Monitoring Systems

The sensor is mainly used for cable partial discharge detection and high-frequency current monitoring.

In power systems, cable insulation conditions are important for maintaining stable operation. The sensor can collect high-frequency signals generated during partial discharge and provide signal input for related monitoring equipment.

Its non-invasive detection method is suitable for applications where equipment operation continuity is required. Without direct electrical contact with the measured current, the sensor can support online monitoring solutions.

The product can also be used in systems requiring current signal collection, condition monitoring, and electrical equipment inspection.

Product Selection Considerations

Before choosing the appropriate sensor model, users should confirm the requirements of the monitoring system, including operating frequency, measurement range, sensitivity, output interface, and installation conditions.

The High Frequency Partial Discharge Current Sensor provides a combination of high-frequency detection capability, non-invasive measurement, and integrated sensing functions. These characteristics make it suitable for cable condition monitoring and partial discharge detection applications.

Conclusion

The High Frequency Partial Discharge Current Sensor is designed for detecting high-frequency current signals generated by cable partial discharge. Through the Roche coil working mode, the sensor provides a non-invasive detection method without direct electrical connection to the measured current.

With a frequency range of 0.3MHz–100MHz, nanosecond-level response speed, 0.1pc sensitivity, and ±0.5% measurement accuracy, the sensor provides reliable technical support for high-frequency signal monitoring.

Its integrated partial discharge and sheath circulation sensing structure, IP68 protection level, and wide operating temperature range make it suitable for cable monitoring systems and electrical condition assessment applications.

For detailed product specifications, technical support, and application solutions, please contact us.