AQ-F255V Feeder protection device
AQ-F255_web
AQ-F255_web

Description

The AQ-F255V feeder protection device offers a modular feeder protection and control solution for applications that require a large I/O capacity. It also includes the automatic voltage regulator (AVR) function with independent and parallel tap control modes, as well as the transformer module with its protections. You can add up to eleven (11) I/O or communication modules into the device for extensive monitoring and control applications. The AQ-F255V feeder protection device communicates using various protocols, including the IEC 61850 substation communication standard.

Highlights:

  • Double busbar control.
  • A large I/O capacity.
  • Automatic voltage regulator (independent and parallel tap control modes).
  • Transformer module with its protection functions.
  • Cable-end differential protection.
  • Low-impedance restricted earth fault protection.
  • Harmonics protection and control.
  • A 5-shot scheme-controlled auto-recloser.
  • Optional power and energy measurement accuracy of up to 0.2 %.

See all AQ-F255 variants

AQ-F255_web

Technical data

  • 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/32N) - 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)
  • Circuit breaker failure protection (CBFP; 50BF/52BF)
  • High-impedance or low-impedance restricted earth fault/ Cable end differential (I0d>; 87N)
  • Voltage-restrained overcurrent (Iv>; 51V)
  • 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)
  • 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) - 8 stages (INST, DT or IDMT)
  • Line thermal overload (TF>; 49F)
  • Resistance temperature detectors (RTD)
  • 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
  • Auto-recloser (0 → 1; 79)
  • Zero sequence recloser
  • Vector jump (Δφ; 78)
  • 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)
  • Frequency (f)
  • Power (P, Q, S, pf) and Energy (E+, E-, Eq+, Eq-)
  • Power and energy class 0.5
  • Power and energy measurement accuracy of up to 0.2 % (optional)
  • Current transformer supervision
  • Voltage transformer supervision (60)
  • Circuit breaker wear monitoring
  • Total harmonic distortion (current)
  • Total harmonic distortion (voltage)
  • Fault locator (21FL)
  • Measurement recorder
  • Measurement value recorder
  • Event recorder (max. 15 000 permanent event records)
  • Disturbance recorder (max. 100 records á 5 seconds at 3.2 kHz sampling)

  • Current inputs: 5
  • Voltage inputs: 4
  • Digital inputs (fixed): 3
  • Digital outputs (fixed): 5
  • Number of empty slots: 11
  • Digital inputs: +8/16/24/32/40/48/56/64/72/80/88 (optional)
  • Digital outputs: +5/10/15/20/25/30 (optional)
  • Milliampere I/O module (4 mA outputs + 1 mA input)
  • Arc protection module (4 sensors + 2 HSO + 1 BI)
  • Communication media (see "Communication" below)
  • External I/O modules (see "Accessories" below)

  • Communication inputs
  • RJ-45 100 Mbps Ethernet (front panel, fixed)
  • RJ-45 100 Mbps Ethernet and RS-485 (rear panel, fixed)
  • 2 x RJ-45 100 Mbps Ethernet with an IRIG-B input (optional)
  • 2 x ST 100 Mbps Ethernet with an IRIG-B input (optional)
  • 2 x LC 100 Mbps Ethernet (PRP/HSR) (optional)
  • RS-232 serial fiber (PP/PG/GP/GG) (optional)
  • Communication protocols
  • IEC 61850 (edition 1)
  • IEC 61850 (edition 2)
  • IEC 60870-5-101/104
  • IEC 60870-5-103
  • Modbus/RTU and Modbus/TCP
  • DNP3
  • SPA

  • AX007 External 6-channel 2-/3-wire RTD input module (pre-configured)
  • AX008 External 8-channel thermocouple and mA input module (pre-configured)
  • AX013 Raising frame (120 mm)
  • AX014 Raising frame (40 mm)
  • AX015 Wall mounting bracket

Additional material

Application Drawing

An application image for AQ-F255A feeder protection device, with one version drawn according to IEC standard symbols and the other according to IEEE/ANSI standard symbols.

Device Rear Image

Device rear image_AQ-255-AAAAAAAAA

Device and Cut-out Image

AQ-250 dimensions and cut-out

Order Code

Order code_F255x (A,R,S)

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