HB-J200MOA Surge Arrester Monitoring Device (Substation)
1. It adopts a high-precision active zero-flux through-core current transformer, which automatically selects the amplification factor according to the magnitude of the measured current to achieve high-precision measurement.
2. It employs a dynamic phasor compensation algorithm to realize high-precision measurement signal analysis.
3. It uses a digital filtering algorithm to eliminate the "zero drift" problem caused by analog filters.
4. It adopts a distributed measurement structure, i.e., local measurement and digital transmission.
5. It can be installed while energized, meaning that it does not require the main equipment to be de-energized for installation, making it convenient and quick to integrate into the system.
The arrester online monitoring device adopts a modular design. Each device samples the ABC three-phase current of the arrester separately or simultaneously collects the ABC three-phase voltage of the busbar, and also collects the amplitude and phase of the public power supply 220V, providing calculation and comparison data for the data acquisition and control unit. Each arrester online monitoring device is equipped with CAN or 485 communication functions, and the devices are interconnected through a bus.
Specific functions are as follows:
1. Collect the leakage current and reference voltage of the arrester device, calculate the fundamental wave and 3rd, 5th, 7th, and 9th harmonic components of the arrester leakage current, and statistics on lightning strike counts and lightning strike times, etc.
2. Collect the busbar voltage and reference voltage of the PT unit, and calculate the fundamental wave and 3rd, 5th, 7th, and 9th harmonic components of the busbar voltage.
3. CAN or 485 network communication
4. Real-time clock: Each device is equipped with real-time clock functionality
5. Temperature and humidity acquisition control: High-precision temperature and humidity sensors are used to collect the internal temperature and humidity of the device in real time.
6. IEC61850 communication
Specifications
- Working Voltage
- AC 220V±10%, 50Hz
- Power Consumption
- <5W under rated voltage
- Ambient Temperature
- －45～80℃
- Measurement Error
- ±0.1℃
- Working Environment Humidity
- ≤100％
- Measurement Error
- ±2%
- Measurement Current Range
- 0.05mA～700mA, measurement accuracy ±1% or ±10μA multi-cycle calibration
- Bus Voltage Measurement Range
- 35kV～1000kV, measurement accuracy 0.5%
- Harmonic Voltage Measurement Range
- 3rd, 5th, 7th, 9th, measurement accuracy ±2% with self-calibration
- System frequency measurement range
- 45～65Hz, measurement accuracy ±0.001Hz
- Lightning strike count recording
- 0～255
- Temperature
- -45℃～80℃, ±0.1%
- Humidity
- 0～100%RH, ±2%
- System design service life
- More than 10 years
- Monitoring cycle
- Factory setting 1 hour
- Shortest monitoring cycle
- Less than 5 minutes
- CAN network structure, network speed is
- ＜500Kbps
- RS485 structure, network speed is
- ≤2400bps
- System survival period
- Over 3 years
- The system's mean time between failures (MTBF)
- Indoor: greater than 5×10⁴ hours; Outdoor: greater than 3×10⁴ hours
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