Generator and Motor Commander
AQ_generator_motor_commander_web._2
AQ_generator_motor_commander_web._2

Description

Synchronous machine control and protection in one package!

The Generator and Motor Commander is a new innovation that combines synchronous machine protection and control into a single device. Compared to traditional systems with several separate devices and multiple software, the Commander takes less space and saves considerable hours of engineering time. Additionally, its operation is smooth as there is only one interface to the system.

The Generator Commander has four software options for its AQ-G257x unit: the “C” variant (AQ-G257C) includes all the standard protection functions as well as excitation control; the “D” variant (AQ-G257D) also has the power system stabilizer (PSS); the “E” variant (AQ-G257E) has the standard protection functions, excitation control, and the synchronizer function; and the the “F” variant (AQ-G257F) has all the above-mentioned features from standard protection functions to excitation control, power system stabilizer (PSS), and synchronizer. For more details on the software options, please see the order code below.

Highlights:

  • Over 86% space savings compared to traditional solutions
  • Less spare parts needed
  • One easy-to-use software saves engineering time
  • The software wizard adapts the data from the generator specifications and calculates the majority of the parameters directly
  • Measurement accuracy of up to 0.2 %, robust technology, and the newest protection functions guarantee the best solution available on the market

Learn more about the Commander:

“Tame the Beasts with Generator and Motor Commander” by Arcteq Relays (https://youtu.be/1wAhC5D25Rc)

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Technical data

  • AQ-G257C – Standard generator protection functionality + Excitation control
  • AQ-G257D – Standard generator protection functionality + Excitation control + PSS
  • AQ-G257E – Standard generator protection functionality + Excitation control + Synchronizer
  • AQ-G257F – Standard generator protection functionality + Excitation control + Synchronizer + PSS
  • AQ-M257C – Standard motor protection functionality + Excitation control

  • 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)
  • 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)
  • 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)
  • Power protection (P, Q, S>/<; 32) - 4 stages (DT)
  • Volts-per-hertz overexcitation (V/Hz>; 24)
  • Underexcitation (Q<; 40)
  • Underimpedance (Z<; 21U)
  • Underreactance (X<; 21/40)
  • Pole slip/Out-of-step protection (78)
  • Inadvertent energizing (I>U<I.A.E.; 50/27)
  • Resistance temperature detectors (RTD)
  • Machine thermal overload (TM>; 49M)
  • Generator/transformer differential (Idx>; 87T/87M/87G)
  • Power factor protection (PF<; 55)
  • 100 % stator earth fault (U03rd>; 64S)
  • Voltage memory
  • Programmable stage (PGx>/<; 99)
  • Arc protection (IArc>/I0Arc>; 50Arc/50NArc) (optional)

  • 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)
  • 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)
  • 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)
  • 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)
  • Power protection (P, Q, S>/<; 32) - 4 stages (DT)
  • Resistance temperature detectors (RTD)
  • Machine thermal overload (TM>; 49M)
  • Motor status monitoring
  • Generator/transformer differential (Idx>; 87T/87M/87G)
  • Motor start/ Locked rotor monitoring (Ist>; 48/14)
  • Frequent start (N>; 66)
  • Non-directional undercurrent (I<; 37)
  • Mechanical jam (Im>; 51M)
  • Underexcitation (Q<; 40)
  • 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
  • Vector jump (Δφ; 78)
  • Synchrocheck (ΔV/Δa/Δf; 25)
  • Synchronizer (ΔV/Δa/Δf; 25) (optional)
  • Excitation with external IGBT bridge

  • 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 - 2 instances
  • Voltage transformer supervision (60)
  • Circuit breaker wear monitoring
  • Total harmonic distortion (current)
  • Total harmonic distortion (voltage)
  • 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: 10
  • Voltage inputs: 4
  • Digital inputs (fixed): 3
  • Digital outputs (fixed): 5
  • Number of empty slots: 9
  • Digital inputs: +8/16/24/32/40/48/56/64/72 (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

Additional material

Application Drawing

Two application images for the Generator and Motor Commander, one for generator protection and the other for motor protection. Both are drawn according to IEC 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_commander

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