AQ-F205 Feeder protection IED

The AQ-F205 feeder protection IED is suitable for any application that requires directional overcurrent and earth fault protections along with voltage and frequency protections. AQ-F205 comes with complimentary measurement, monitoring, control and communication features. The relay’s standard configuration of eleven (11) digital inputs and ten (10) digital outputs along with a large, programmable HMI allow for a variety of adaptations.

Highlights

  • Integrated protection, control and measurement
  • Price–performance ratio


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  • Non-directional overcurrent (I>; 50/51) - 4 stages (INST, DT or IDMT)
  • Non-directional earth fault (I0>; 50N/51N) - 4 stages (INST, DT or IDMT)
  • Directional overcurrent (Idir>; 67) - 4 stages (INST, DT or IDMT)
  • Directional earth fault (I0dir>; 67N) - 4 stages (INST, DT or IDMT)
  • Negative sequence overcurrent/ Phase current reversal/ Current unbalance (I2>; 46/46R/46L) - 4 stages (INST, DT or IDMT)
  • Harmonic overcurrent (Ih>; 50H/51H/68H) - 4 stages (INST, DT or IDMT)
  • High-impedance or low-impedance restricted earth fault/ Cable end differential (I0d>; 87N)
  • Overvoltage (U>; 59) - 4 stages (INST, DT or IDMT)
  • Undervoltage (U<; 27) - 4 stages (INST, DT or IDMT)
  • Neutral overvoltage (U0>; 59N) - 4 stages (INST, DT or IDMT)
  • Sequence voltage (U1/U2>/<; 47/27P/59PN) - 4 stages (INST, DT or IDMT)
  • Circuit breaker failure protection (CBFP; 50BF/52BF)
  • Overpower (P>; 32O)
  • Underpower (P<; 32U)
  • Reverse power (Pr; 32R)
  • Overfrequency and underfrequency (f>/<; 81O/81U) - 8 stages (INST or DT)
  • Rate-of-change of frequency (df/dt>/<; 81R) - 1 stage (DT)
  • Line thermal overload (TF>; 49F)
  • Voltage memory
  • Number of objects to control and monitor: 5
  • Number of indicators to monitor: 5
  • Number of setting groups: 8
  • Cold load pick-up
  • Switch-on-to-fault
  • Auto-recloser (0 → 1; 79)
  • Synchrocheck (ΔV/Δa/Δf; 25)
  • Phase, sequence and residual currents (IL1, IL2, IL3, I01, I02)
  • Phase, sequence and residual voltages (UL1, UL2, UL3, U12, U23, U31, U0)
  • Power and energy class 0.5
  • Current transformer supervision
  • Voltage transformer supervision (60)
  • Disturbance recorder (max. 15 000 permanent event records)
  • Circuit breaker wear monitoring
  • Total harmonic distortion
  • Fault locator (21FL)
  • Frequency (f)
  • Power (P, Q, S, pf) and Energy (E+, E-, Eq+, Eq-)
  • Measurement recorder
  • Measurement value recorder
  • Current inputs: 5
  • Voltage inputs: 4
  • Digital inputs (fixed): 11
  • Digital outputs (fixed): 10
  • RJ-45 100 Mbps Ethernet (front panel, fixed)
  • RJ-45 100 Mbps Ethernet and RS-485 (rear panel, fixed)
  • Communication protocols
  • IEC 60870-5-101/104
  • IEC 60870-5-103
  • Modbus/RTU and Modbus/TCP
  • DNP3
  • SPA