The HFCT partial discharge sensor is designed for high-voltage cables. Based on High-Frequency Current Transformer (HFCT) technology and Rogowski coil principles, it uses a non-intrusive clamp-on structure to capture PD pulse current signals from cable grounding leads. Available in wireless and wired versions, it offers a 1-5000 pC detection range with 1 pC sensitivity, featuring real-time monitoring, threshold alarming, and scalable networking.
The wireless version has a built-in high-capacity lithium battery (lifespan > 3 years) and uses LoRa (470-510MHz) for wireless transmission over > 300 meters. The wired version is powered by DC12-24V and uses a shielded RS485 twisted pair with MODBUS RTU (9600bps) for data exchange. Both come with a 30mm open HFCT sensor that clips onto the cable ground wire and connects to the host via a coaxial cable. Users can choose based on on-site power and transmission needs for efficient, accurate cable partial discharge monitoring.
The HFCT partial discharge sensor is designed for high-voltage cables. Based on High-Frequency Current Transformer (HFCT) technology and Rogowski coil principles, it uses a non-intrusive clamp-on structure to capture PD pulse current signals from cable grounding leads. Available in wireless and wired versions, it offers a 1-5000 pC detection range with 1 pC sensitivity, featuring real-time monitoring, threshold alarming, and scalable networking.
The wireless version has a built-in high-capacity lithium battery (lifespan > 3 years) and uses LoRa (470-510MHz) for wireless transmission over > 300 meters. The wired version is powered by DC12-24V and uses a shielded RS485 twisted pair with MODBUS RTU (9600bps) for data exchange. Both come with a 30mm open HFCT sensor that clips onto the cable ground wire and connects to the host via a coaxial cable. Users can choose based on on-site power and transmission needs for efficient, accurate cable partial discharge monitoring.
Installation location
An HFCT sensor clamped around the grounding conductor captures these pulses and converts them into voltage signals via a high-bandwidth ferrite core. After amplification and filtering, the processed signals are analyzed to determine the type and severity of PD activity.
PD sensor supports two power supply options:
-. PD sensor is powered by the HMI through a 24VDC power cable.
-. Data is transmitted to the HMI via RS485 communication.
-. PD sensor is powered by internal battery.
-. Data is transmitted via LoRa network to a wireless receiver.
-. The wireless receiver is powered by the HMI through a 12VDC power cable and forwards the received data to the HMI via RS485 communication.
| Partial discharge sensor | |
| Power supply | Wireless version: 7.2V 3000mAh lithium battery; battery life: >3 years |
| Wired version: 24VDC | |
| Wireless transmission frequency band | 470-510MHz |
| Wireless maximum transmission distance | >300 meters (line-of-sight range) |
| Monitoring type | High-frequency pulse current |
| Detection range | 1-5000pC |
| Sensitivity | 1pC |
| Acquisition frequency band | 1MHz-100MHz |
| Operating temperature | -30-70°C |
| Sampling cycle | Wireless version:2 hours
Wired version:4S |
| Power on/off method (wireless version) | Physical button |
| Uploading method (wireless version) | Single manual upload/ scheduled upload |
| Dimensions | 134mm*100mm*42mm (W*H*D) |
| Mounting method | Magnetic mounting |
| High-frequency pulse CT | |
| Monitoring principle | Rogowski Coil |
| Monitoring frequency band | 3-80MHz |
| Sensitivity | 1pC |
| Matching impedance | 50Ω |
| Protection level | IP68 |
| Dimension | 82*82*32mm (W*H*D), hole size: 30mm |
| Mounting method | Split-core current sensor |
| Mounting location | Cable Ground Wire |
| Operating temperature | -55°C to +85°C |
