Arcteq AQ-F255 Protection Relay – Feeder and Line Protection

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Arcteq AQ-F255 – Feeder and Line Protection Relay

The Arcteq AQ-F255 is a modular feeder and line protection relay with a large I/O capacity, available in eight functional variants (A–E, R, S and V). Across the range, protection functions include full feeder protection, line differential protection (ANSI 87L) and line-segment-based distance protection (ANSI 21), with phase-specific tripping, synchroniser and automatic voltage regulator options.

AQ-F255 supports IEC 61850 communications and IEC 62443-4-2 Security Level 1 (SL1) cybersecurity, with up to 11 I/O or communication modules for application-specific expansion.

The Arcteq AQ-F255 is a modular protection and control platform for feeder and line applications. Its modular hardware allows up to 11 I/O or communication modules to be fitted to match the required signals, interfaces and control functions.

Key points

Line differential protection (ANSI 87L) over Arcteq’s dedicated process bus; a transformer can be included within the protected zone.
Line-segment-based distance protection (ANSI 21), allowing individual line-segment impedance values to be used and including power swing blocking (ANSI 68) and out-of-step protection (ANSI 78).
Low-voltage ride-through (LVRT; ANSI 27T) protection for applications subject to grid-code requirements.
Optional power and energy measurement accuracy of up to 0.2%.
Cybersecurity compliant with IEC 62443-4-2 Security Level 1 (SL1).
Modular expansion with optional arc protection, RTD inputs and high-speed/high-current outputs.

Options AQ-F255

AQ-F255A — full feeder protection.
AQ-F255B — line differential protection with current-based protection functions.
AQ-F255C — line differential protection with full feeder protection.
AQ-F255D — line-segment-based distance protection with full feeder protection.
AQ-F255E — line differential and line-segment-based distance protection with full feeder protection.
AQ-F255R — full feeder protection with phase-specific tripping and recloser control.
AQ-F255S — full feeder protection with synchroniser functionality.
AQ-F255V — full feeder protection with automatic voltage regulator (AVR) and transformer module.

Communications and standards

IEC 61850 Editions 1 and 2; IEC 60870-5-101/-103/-104; Modbus RTU and Modbus TCP; DNP3; SPA.

Typical application

Medium-voltage feeders; overhead lines, cable circuits and mixed overhead/cable networks; industrial substations; CHP and renewable generation grid connections.

Key points

Line differential protection (ANSI 87L) over Arcteq’s dedicated process bus; a transformer can be included within the protected zone.
Line-segment-based distance protection (ANSI 21), allowing individual line-segment impedance values to be used and including power swing blocking (ANSI 68) and out-of-step protection (ANSI 78).
Low-voltage ride-through (LVRT; ANSI 27T) protection for applications subject to grid-code requirements.
Optional power and energy measurement accuracy of up to 0.2%.
Cybersecurity compliant with IEC 62443-4-2 Security Level 1 (SL1).
Modular expansion with optional arc protection, RTD inputs and high-speed/high-current outputs.

Options AQ-F255

AQ-F255A — full feeder protection.
AQ-F255B — line differential protection with current-based protection functions.
AQ-F255C — line differential protection with full feeder protection.
AQ-F255D — line-segment-based distance protection with full feeder protection.
AQ-F255E — line differential and line-segment-based distance protection with full feeder protection.
AQ-F255R — full feeder protection with phase-specific tripping and recloser control.
AQ-F255S — full feeder protection with synchroniser functionality.
AQ-F255V — full feeder protection with automatic voltage regulator (AVR) and transformer module.

Communications and standards

IEC 61850 Editions 1 and 2; IEC 60870-5-101/-103/-104; Modbus RTU and Modbus TCP; DNP3; SPA.

Typical application

Medium-voltage feeders; overhead lines, cable circuits and mixed overhead/cable networks; industrial substations; CHP and renewable generation grid connections.