3A300 Pilot Wire DC Intertrip System


The 3A300 has been designed to integrate a complete scheme allowing bi-directional group intertripping of up to four remotely connected sites. Inherent 5KV or 15KV isolation allows application on electrical networks where large induced voltages may be experienced on the pilots. System reliability is provided by the extensive built in supervision facilities. Security is achieved through the high isolation & AC immunity of the intertrip receive elements. The efficient compact design of the 3A300 makes it suitable for surface or panel mounting & allows the use of standard sub station batteries.


  • Bi-directional group intertripping of up to four (4) stations (sites)
  • Operates using conventional metallic pilot wires
  • 0 to 2K ohm & 0 to 2uF pilot wire characteristic
  • Inherent 5KV or 15KV isolation
  • Integrated pilot wire supervision system to identify location of pilot faults
  • Extensive self supervision features to ensure tripping integrity
  • Integrated trip circuit supply supervision
  • Simple to set up & commission
  • Flush, rack or projection mounting
  • M4 screws for control wiring
  • M5 studs for pilot cable connection with clear protective isolation cover
  • Made in Australia

This product is obsolete.

Consider the alternative 3A20 relay for your application. Note that the 3A20 is not directly equivalent to the 3A300.




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