Products Relays

October 2013 - Transition to 4000 Series Protection Relays
ERLPhase is pleased to announce to our relay customers that our 4000 series of protection products is now complete, including the addition of the F-PRO 4000 and the advanced B-PRO 4000 Multibus Protection Relay. Customers used to purchasing our older generation protection relays will experience a seamless transition and increased functionality with the purchase of 4000 series relays.

L-PRO 2100 Transmission Line Protection Relay

L-PRO 2100 Transmission Line Protection Relay

The L-PRO 2100 provides comprehensive distance based line protection, DFR quality fault oscillography, standard ring bus capability, swing recording, event logging, SCADA control and metering in a fully integrated protective relay solution.


  • 4 zones of phase and ground distance functions - user-defined mho shapes or quadrilateral shapes and communication based schemes
  • Protection functions - IEEE devices 21P, 21N, 25/27/59 (25C), 27, 50BF, 50LS, 50/51/67, 50N/51N/67, 46/50/51/67, 59, 60, 68, 79, 81, Dead Line Pickup (SOTF) and Weak Infeed
  • 1.0 to 1.3 cycle operation at 80% reach, ideal for transmission line applications
  • Ring bus capability - breaker failure and individual breaker monitoring
  • 4 shot recloser with dead line/dead bus control and sync check
  • CCVT compensation
  • ProLogic - 12 control logic statements
  • 8 setting groups with setting group logic
  • Optional expanded I/O, up to 20 external inputs and 21 outputs
Recording, Monitoring and Metering
  • High quality recording - fault recording (96 samples/cycle), dynamic swing recording and event logging
  • Fault location - information provided by event log access or analog input point for SCADA
  • Breaker monitoring
  • Metering functions for each input connection
Substation Automation - Ethernet Ready
  • Direct-connect DNP3 and Modbus SCADA communication protocols
  • 3 communication RS-232 ports
  • IRIG-B time stamping and sample synchronization
  • 30 virtual inputs for local and remote control
  • Standard 10 Base T Ethernet Port
  • Optional internal modem
Easy To Use
  • User-friendly relay setting and record analysis software (Windows® 2000/XP) included
  • Intuitive ASCII-terminal interface provides full local or remote access

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Winnipeg, Canada