Language
Chinese version English

Phone: 400-027-8938

Mobile: 133 9714 9829

Product Details

Functionality

The device employs a modular design: each unit independently samples the three-phase currents of capacitive equipment or simultaneously acquires the three-phase voltages of the busbar, while also measuring the magnitude and phase of the 220 V utility power supply to provide the control unit with reference data for computation. Each online monitoring unit for capacitive equipment is equipped with CAN or RS‑485 communication capabilities, and the units are interconnected via a bus network.

The specific functions are as follows:

  1. The leakage current and reference voltage of the capacitive device are acquired, and the leakage current, capacitive current, capacitance, and dielectric loss are calculated.

2. Acquire the PT unit bus voltage and the reference voltage, and calculate the fundamental component as well as the 3rd, 5th, 7th, and 9th harmonic components of the bus voltage.

3. CAN or 485 network communication

4. Real-Time Clock: Each device is equipped with a real-time clock function.

5. IEC 61850 communication.

Technical Indicators

1. Work Environment

  • Operating voltage: AC 220V ±10%, 50Hz
  • Power Consumption: Less than 5 W at rated voltage
  • Ambient temperature

Indoor system:   -10℃ ~ +55℃

Outdoor System:   -25℃ ~ +70℃

  • Operating environment humidity: ≤95%

 

2 Monitoring Parameters and Indicators

  • Leakage current measurement range: 0.05 mA to 650 mA   Measurement accuracy: ±1% of reading
  • Capacitance measurement range: 100 pF to 50,000 pF    Measurement accuracy: ±1% of reading
  • Dielectric loss factor: 0.1% to 30%    Measurement accuracy: ±(1% of reading + 0.0005)
  • System voltage measurement range: 35 kV to 1000 kV   Measurement accuracy: ±0.2% of reading
  • System frequency measurement range: 45–65 Hz    Measurement accuracy: ±0.002 Hz
  • Accuracy of 3rd, 5th, 7th, and 9th harmonic measurements: ±1.0% of reading
  • Protection rating: IP55

 

3 Other Technical Indicators

  • System Capacity: 80 local modules
  • Monitoring interval: 1 hour by default
  • Shortest monitoring interval: 5 minutes
  • CAN network architecture, with a network rate of: <500 Kbps
  • RS485 architecture, network rate: ≤2400 bps
  • The system has a lifecycle of more than three years.
  • Mean Time Between Failures (MTBF) of the system: Indoor: greater than 5×10 4 Hour.

Outdoor: greater than 3×10 4 hour

Keywords:

NDRX-8000 Insulator Online Monitoring System

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