Product Introduction
The intelligent online monitoring system for lightning arresters consists of a comprehensive monitoring unit, multiple lightning arrester online monitoring devices, and bus voltage monitoring devices. It is mainly used for real-time monitoring of the working condition of lightning arresters, with monitoring parameters including full current, resistive current, and action frequency.
The comprehensive monitoring unit provides two RS485 field buses, each of which can be connected to 32 online monitoring devices. Each lightning arrester online monitoring device is equipped with 3 sensors, which can simultaneously monitor the operation status of ABC three-phase lightning arresters.
The integrated monitoring unit supports the IEC61850 protocol and can be used as an intelligent electronic device (IED) for smart substations.
Its characteristics include:
1. Adopting high-precision zero magnetic flux sensors, digital filtering, and multi-channel collaborative sampling technology, the measurement accuracy is high. The measurement error of the resistive current of the lightning arrester is less than 1%, and the measurement error of the capacitance and dielectric loss factor of the capacitive equipment is less than 0.5%.
2. Adopting phase-locked loop technology to automatically track the frequency of the power grid, solving the problem of spectrum leakage in fast Fourier transform, and preventing the impact of power grid frequency fluctuations on measurement.
3. Strong anti-interference ability, using multi-layer shielding technology to effectively shield electric and magnetic field interference, and can work stably in places with severe electromagnetic interference.
4. Adopting multi-level lightning protection technology to suppress lightning hazards from power lines, signal lines, or data lines, ensuring the safety of online monitoring devices and their sensors.
5. Adopting modular design, all online monitoring devices can use the same hardware equipment, making it easy to maintain.
6. Adopting a distributed structure, flexible networking, and adding or reducing monitoring devices does not affect the system structure.
7. On site measurement and digital transmission completely solve the distortion problem in the process of analog signal transmission.
8. Supports the IEC619850 protocol, which can be integrated into intelligent substation monitoring systems or used as an independent online monitoring system for lightning arresters and capacitive devices.
