Model:
HMJ1010-WCK
Product Overview:
The high-voltage live display partial discharge (PD) terminal is designed to reliably monitor the partial discharge of A, B, and C phase busbars in switchgear and ring main units. The monitoring terminal communicates via RS485 and supports the Modbus protocol, offering strong anti-interference capability, long transmission distance, and stable operation. The PD terminals are typically installed on the exterior of switchgear cabinets or inside relay protection rooms, with each unit connected in series across switchgear intervals.
Key Features:
- Enables online partial discharge monitoring of electrical equipment
- Data transmission via RS485 with Modbus protocol
- Long communication distance with high safety and reliability
- Strong anti-interference and stable performance
- High sensitivity for accurate PD signal detection
Technical Specifications:
| Item | Specification |
| Applicable Ceramic Capacitor Range | 20pF–400pF (≤35kV) |
| Frequency Range | 500kHz–20MHz |
| Measurement Range | 0–67dB |
| Linearity Error | ≤±15% (dynamic range 40dB) |
| PD Detection Range | 10pC–10nC |
| Sensitivity | ≥10pC |
| Power Supply | DC12V or DC24V |
| Communication Method | RS485 |
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