AQ-F255 Feeder protection IED

The AQ-F255 feeder protection IED offers a modular feeder protection and control solution for applications that require a large I/O capacity. You can add up to eleven (11) I/O or communication cards into the device for extensive monitoring and control applications. AQ-F255 communicates using various protocols, including the IEC 61850 substation communication standard.

 

Highlights

  • Double busbar control
  • A large I/O capacity
  • Current- and voltage-based protections
  • Cable end differential protection
  • Low-impedance restricted earth fault protection
  • Harmonics protection and control
  • A 5-shot scheme-controlled auto-recloser
  • Power and energy measurement up to Class 0.2S


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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)
  • Intermittent earth fault (I0int>; 67NT)
  • 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
  • Programmable stage (PGx>/<; 99)
  • Arc protection (IArc>/I0Arc>; 50Arc/50NArc) (optional)
  • Number of objects to control and monitor: 10
  • Number of indicators to monitor: 10
  • Number of setting groups: 8
  • Cold load pick-up
  • Switch-on-to-fault
  • Vector jump (Δφ; 78)
  • Auto-recloser (0 → 1; 79)
  • Zero sequence recloser
  • 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
  • Power and energy class 0.2S (optional)
  • 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): 3
  • Digital outputs (fixed): 5
  • Options (11 slots)
  • Digital inputs: +8/16/24/32/40/48/56/64/72/80/88
  • Digital outputs: +5/10/15/20/25/30
  • RTD & mA input module (8 RTD inputs OR 4 RTD inputs + 2 mA inputs)
  • Milliampere I/O module (4 mA outputs + 1 mA input)
  • Arc protection module (4 sensors + 2 HSO + 1 BI)
  • Communication media (specified in the "Communication" tab)
  • RJ-45 100 Mbps Ethernet (front panel, fixed)
  • RJ-45 100 Mbps Ethernet and RS-485 (rear panel, fixed)
  • Double LC 100 Mbps Ethernet (PRP/HSR) (optional)
  • RS-232 & serial fibre (PP/PG/GP/GG) (optional)
  • Communication protocols
  • IEC 61850
  • IEC 60870-5-101/104
  • IEC 60870-5-103
  • Modbus/RTU and Modbus/TCP
  • DNP3
  • SPA

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