Model:
HMJ1010-HCT
Product Overview:
The HMJ1010-HCT intelligent high-frequency current sensor is designed for online monitoring of partial discharge (PD) high-frequency current signals (HFCT) in equipment such as transformer grounding terminals and high-voltage cable joints. It enables real-time insight into the insulation condition of electrical equipment, helping to identify hidden faults early and ensuring safe and stable operation.
Key Features:
High Sensitivity:
Capable of accurately capturing weak high-frequency current signals caused by partial discharges. It can detect current changes in the milliampere or even microampere range, making it effective for early fault detection.
Wide Frequency Response:
Offers a broad frequency detection range, typically from hundreds of kHz up to tens of MHz, effectively identifying high-frequency signals generated by partial discharges and providing rich diagnostic data.
Strong Anti-Interference Capability:
Equipped with specialized shielding, filtering technology, and optimized circuit design to suppress electromagnetic interference from other electrical devices and wireless signals in substations, ensuring accurate detection.
Non-Intrusive Detection:
The sensor adopts a clamp-on or wrap-around design, allowing installation on grounding wires or neutral leads without disassembling or damaging the equipment. This enables continuous monitoring without disrupting normal operation.
Technical Specifications:
| Item | Specification |
| Frequency Range | 0.5–30 MHz |
| Measurement Range | 0–70 dB |
| Bandwidth | ≥2 MHz |
| Sensor Size | Inner Diameter ≈ 56 mm (customizable) |
| Transfer Impedance | ≥6.5 mV/mA |
| Sensitivity | Minimum detectable PD level ≤ 50 pC |
| Communication | Wireless: LoRa / Wired: RS485 |
| Power Supply | Wireless: Built-in lithium battery |
| Wired: DC 24V | |
| Operating Temperature | -40°C to +85°C |
| Operating Humidity | 5%–95% RH |
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