AQ-L310 Line differential protection device
Home Protection relays Line protection AQ-L310 Line differential protection device
Description
AQ-L310 is a line protection device with line differential protection for transmission, sub-transmission and distribution line protection applications. It integrates a full range of line protection functions as well as a variety of additional functions for control, measurement, monitoring and communications.
Highlights:
Line differential, up to 120 km with fiber optic communication.
Redundant fiber communication option.
Mono-mode and multi-mode fiber support.
Alternative communication media available (e.g. pilot wire).
Technical data
Three-phase instantaneous/time overcurrent (I>; 50/51)
Residual instantaneous/time overcurrent (I0>; 50N/51N)
Directional residual overcurrent (I0dir>; 67N/32N)
Negative sequence overcurrent/ Current unbalance (I2>; 46)
Thermal overload (T>; 49)
Line differential (87L)
Overvoltage (U>; 59)
Undervoltage (U>; 27)
Residual overvoltage (U0>; 59N)
Over- and underfrequency (f>/<; 81O/81U)
Rate-of-change of frequency (df/dt; 81R)
Circuit breaker failure protection (CBFP; 50BF/52BF)
Teleprotection (85)
Inrush detection and blocking
Common function
Trip logic (94)
Dead line detection
Auto-recloser (0 → 1; 79)
Switch-on-to-fault
Voltage variation
Current (IL1, IL2, IL3, I0)
Voltage (U1, U2, U3, U12, U23, U31, U0) and frequency (f)
Frequency (f)
Power (P, Q, S, pf) and Energy (E+, E-, Eq+, Eq-)
Current transformer supervision
Voltage transformer supervision (60)
Switching device status monitoring
Trip circuit supervision
Event recorder
Disturbance recorder
Standard
CPU module (MM/ST + RJ-45)
Power supply module (PS + fault relay + 2 trips)
Current measurement module
Number of empty slots: 2
Options
Voltage measurement module
Trip module (4 outputs)
6 digital inputs (1x6) + 5 digital outputs
8 digital inputs (1x8)
12 digital inputs (3x4)
8 digital outputs (1x8)
12 digital outputs (4x3)
Communication inputs
RJ-45 100 Mbps Ethernet + MM/ST fiber optic Ethernet
Line differential communication SM/FC (0...50 km)
2 x ST/MM redundant fiber optic Ethernet (optional)
ST/MM fiber optic Ethernet and RS-485 (optional)
LC/MM and RJ-45 (optional)
2 x LC/MM (optional)
Line differential communication SM/FC (10...120 km) (optional)
PRP/HSR (optional)
Communication protocols
IEC 60870-5-101/104/103
Modbus/RTU and Modbus/TCP
DNP3.0
IEC 61850 (optional)
Directional overcurrent (Idir; 67) (optional)
Line differential with transformer in zone (optional)
Advanced "CyberProtect" cyber security feature (optional)
