Arc-suppression coil in China's 3-35KV power supply system, most of them are ungrounded neutral systems. In the event of single-phase grounding, the power grid can still operate with faults, which greatly reduces operating costs and improves the reliability of the power supply system. However, this power supply method is prone to arc grounding overvoltage and phase to phase short circuit when the single-phase grounding current is high, causing great harm to the power supply equipment. The previous solution was to install an arc suppression coil at the neutral point to compensate for capacitor current and suppress the probability of arc light occurring at the fault point. It is obvious that the purpose of this method is to eliminate arc light, but due to the many characteristics of the arc suppression coil itself, it is difficult to effectively compensate for the capacitance current, especially the harm caused by the high-frequency component to the power supply equipment cannot be overcome. Intelligent arc suppression device, which uses a set of vacuum contactors that can be controlled in phases to ground the faulty phase when arc grounding occurs, achieving the goal of completely eliminating arc light.
Environmental temperature: Indoor type -15 degree +60 degree Special can achieve -30 degree -+60 degree
Altitude: Less than or equal to 2000m, special circumstances can reach 4000m
Using PHILIPS company's 32-bit processor based on ARMTTDMI-S core, using multi-core technology for data collection and analysis judgment, with clear division of labor among units, greatly improving the collection rate and making judgments more accurate.
When a single-phase arc grounding occurs in the system, it can be quickly converted to metal grounding
Cycle detection of PT open delta voltage, real-time data collection, and analysis and calculation of data through digital signal processing techniques such as digital measurement, filtering, and amplification. If a fault occurs, the current fault type is determined; If it is ferromagnetic resonance, immediately start the harmonic elimination circuit to eliminate ferromagnetic resonance at frequencies of 17Hz (1/3 division), 25Hz (1/2 division), 50Hz (power frequency), 150Hz (3rd harmonic), and above
This device has an accident memory function, which can record the time of 30 events and the action status of the device.
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