AQ-2000 Arc quenching device (medium-voltage)

The AQ-2000 arc quenching system extinguishes arcing faults within 6 milliseconds of arc initiation. The AQ-100 series by Arcteq is a reliable and fast-acting arc protection system which provides excellent protection against arcing thermal effects by tripping the sourcing circuit breaker(s) almost instantly. When protecting against arcing fault pressure effects, circuit breakers are sometimes not fast enough as the pressure wave builds up within the first 10 milliseconds of the fault.

The AQ-2000 arc quenching system is developed to limit the total arcing time to less than 6 ms, and to minimize -or even eliminate- the damaging effects of the arc fault’s pressure. In most applications this will result in an energy release of less than 1 cal/cm2.

AQ-2000 is used in conjunction with the AQ-100 arc protection system. When an AQ-100 series unit detects a fault, it triggers the AQ-2000 arc quenching system and, at the same time, trips the circuit breaker(s) feeding the fault. Then AQ-2000 creates a low-impedance parallel path for the fault current to flow through, thus extinguishing the arc fault. The total arcing time is less than 6 milliseconds.


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  • Power supply: 24 V DC
  • Rated voltage: 400 V DC
  • Trigger current pulse: 4 000 A
  • Rated voltage: up to 17.5 kV
  • Short-circuit withstand: 40 kA for 1 s
  • BIL: 38/95 kV
  • Peak current: 100 kA
  • Electric life: 2 operations at 40 kA, 100 ms each
  • Mechanical life: 12 operations
  • Total system operation time: <6 ms