AQ-T215 Voltage Regulating IED

AQ-T215 is a voltage regulating IED. It comes with current and voltage based protection functions as well making it suitable for combined transformer voltage regulation and back-up protection. Transformer monitoring module included as a standard feature provides for statistical information for preventive maintenance purposes. The AQ-T215 communicates using various protocols including IEC 61850 substation communication standard.

Highlights

  • Automatic / manual voltage regulating (AVR)
  • Transformer back-up protection
  • Through fault and overloading statistics for preventive maintenance
Protection
High/low impedance restricted earth fault / cable end differential * (87N1, 87N2)
Transformer thermal overload (49T/49RTD)
Three-phase overcurrent, 2+2 stages INST, DT or IDMT (50/51)
Earth-fault (sensitive), 3 stages INST, DT or IDMT (50/51N)
Harmonic overcurrent / inrush blocking, 4 stages INST, DT or IDMT (50/51H, 68)
Current unbalance / broken conductor, 2+2 stages INST, DT or IDMT (46/46R/46L)
Overvoltage, 4 stages INST, DT or IDMT (59)
Undervoltage, 4 stages INST, DT or IDMT (27)
Zero sequence overvoltage, 4 stages INST, DT or IDMT (59N)
Negative/positive sequence overvoltage, 4 stages INST, DT or IDMT (47)
Volts per hertz (24)
Breaker failure protection (50BF/52BF)
Arc protection (option) (50ARC/50NARC)