The core information function and principle of the automatic tracking compensation complete set device for arc suppression coil:
Automatic tracking compensation: Real time monitoring of grid capacitance current, injecting inductive current by adjusting the inductance of the arc suppression coil (turn adjustment, bias magnetic or thyristor induction adjustment), offsetting the capacitive current during ground faults, limiting arc overvoltage and promoting arc extinguishing.
Full state tuning: supports rapid sensing under various working conditions such as normal operation, metal grounding, intermittent arc, etc. Some electronic solutions (such as DC bias magnetic) can achieve millisecond level response.
Main components: grounding transformer, arc suppression coil, on load tap changer (or electronic sensing module), damping resistor, microcomputer controller.
Expansion function: Optional parallel resistance line selection device or small current line selection module can be selected to improve the accuracy of fault location.
Turn adjustment type: Adjust the number of turns of the coil through a mechanical on load switch, with a wide adjustment range but slower speed. The adjustable turn arc suppression coil is equipped with multiple taps, and the tap of the arc suppression coil is adjusted by an on load adjustment switch to change the inductance value, in order to achieve the output of electric current and achieve the purpose of automatic tracking compensation.
Magnetic bias/electronic type: using DC bias or thyristor to control the magnetic permeability of the iron core, with fast tuning speed and no harmonic pollution. The biased magnetic arc suppression coil is a magnetized iron core segment arranged inside the arc suppression coil, which changes the magnetic flux of the iron core by applying a DC excitation current, thereby achieving continuous and adjustable inductance.
Voltage level: Suitable for power grids with 6kV, 10kV, and 35kV neutral points grounded through arc suppression coils.
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