AQ-V251 Voltage protection device


AQ-V251 Voltage protection device AQ-V251 Voltage protection device Ask for an offer Home Protection relays Voltage protection AQ-V251 Voltage protection device Description The AQ-V251x voltage protection device offers a modular voltage protection solution for substations. The relay includes both voltage and frequency protections as well as powerful logic programming, and you can add up to eleven (11) I/O or communication cards. All this makes AQ-V251x optimal for demanding load shedding and automatic transfer applications that require a large I/O capacity. AQ-V251x voltage protection device communicates using various protocols, including the IEC 61850 substation communication standard. The AQ-V251x comes in two variants: AQ-V251A has all the I/O capacity and protections, while AQ-V251B also includes the synchronizer control function. Highlights: A large I/O capacity. Eight (8) frequency stages and eight (8) setting groups for load shedding. Synchrocheck for up to three (3) circuit breakers. Anti-islanding protection. Technical data Circuit breaker failure protection (CBFP; 50BF/52BF) 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) Resistance temperature detectors (RTD) Voltage memory Programmable stage (PGx>/<; 99) Number of objects to control and monitor: 5 Number of indicators to monitor: 5 Number of setting groups: 8 Switch-on-to-fault Vector jump (Δφ; 78) Synchrocheck (ΔV/Δa/Δf; 25) Number of objects to control and monitor: 5 Number of indicators to monitor: 5 Number of setting groups: 8 Switch-on-to-fault Vector jump (Δφ; 78) Synchrocheck (ΔV/Δa/Δf; 25) Synchronizer (ΔV/Δa/Δf; 25) Phase, sequence and residual voltages (UL1, UL2, UL3, U12, U23, U31, U0) Voltage transformer supervision (60) 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) Voltage inputs: 4 Digital inputs (fixed): 3 Digital outputs (fixed): 5 Number of empty slots: 13 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) (optional) 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) Double RJ-45 Ethernet & IRIG-B communication module (optional) Double ST Ethernet & IRIG-B communication module (optional) Double LC (HSR/PRP) Ethernet communication module (optional) RS-232 & serial fiber communication module (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) AX009 Raising frame (87 mm) AX010 Raising frame (40 mm) AX011 Combiflex frame AX012 Wall mounting bracket Additional material Application Drawing Device Rear Image Device and Cut-out Image Order Code Download application drawing Download device rear image Download device and cut-out dimensions Download order code Download AQ 200 series product catalog (ANSI, v2.03, EN, September 2024) AQ 200 series product catalog (IEC, v2.03, EN, September 2024) AQ-V251 Instruction manual (v2.13, English) Related products AQ-V211 Voltage protection device The AQ-V211 voltage protection device offers a modular voltage protection solution for substations. The relay includes […] Ask for an offer or more information We provide a comprehensive range of services through our own skilled staff and a global network of partners. Name(Required) First Last Country(Required) Email(Required) Add attachment Company(Required) Max. file size 300 MB Phone Add attachment Max. file size: 10 MB. Description(Required) What colour is a firetruck?(Required) To confirm you are not a robot, please answer this question. GDPR(Required) I agree to the Privacy Policy *

Description

The AQ-V251x voltage protection device offers a modular voltage protection solution for substations. The relay includes both voltage and frequency protections as well as powerful logic programming, and you can add up to eleven (11) I/O or communication cards. All this makes AQ-V251x optimal for demanding load shedding and automatic transfer applications that require a large I/O capacity. AQ-V251x voltage protection device communicates using various protocols, including the IEC 61850 substation communication standard.

The AQ-V251x comes in two variants: AQ-V251A has all the I/O capacity and protections, while AQ-V251B also includes the synchronizer control function.

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