AQ300 Series – AQ-L357 Line Protection Relay

The Arcteq AQ-L357 is a line protection relay with full scheme distance protection for transmission and sub-transmission line protection applications.

It integrates a full range of line protection functions along with variety of additional functions for control, measurement, monitoring and communications.

 

Key features of the AQ-L357 line protection relay

Protection functions

  • Distance protection, 5 zones forward or reverse
  • Pole discordance
  • Stub protection
  • Out of step
  • Overvoltage, 2 stages INST, DT
  • Undervoltage, 2 stages INST, DT
  • Line thermal protection
  • Breaker failure protection (50BF,52BF)
  • Under/over frequency, 4 stages DT
  • Rate of change of frequency, 1 stage DT

Measuring and monitoring

  • Current (I1, I2, I3, Io)
  • Voltage (U1, U2, U3, U12, U23, U31, Uo) and frequency
  • Power (P, Q, S, pf) and Energy (E+, E-, Eq+, Eq-)
  • Trip circuit supervision (TCS)
  • Dead line detection function
  • Circuit breaker wear protection
  • Non-volatile disturbance records: 100
  • Non-volatile event records: 10000

I/Os

  • Current inputs: 4
  • Voltage inputs: 4
  • Digital inputs: 12 (Up to 120)
  • Digital outputs: 8 (Up to 40)

Communications

  • RJ 45 Ethernet 100Mb (front standard)
  • RJ 45 Ethernet 100Mb (rear standard)
  • RS422/RS485/RS232 interfaces (option)
  • Plastic or glass fiber interfaces (option)
  • IEC 61850
  • IEC 608705101,103,104
  • Modbus RTU and Modbus TCP/IP
  • DNP 3.0 and DNP 3.0 over TCP/IP
  • SPAbus