Digital Energy > Protection & Control > Pilot and Distance Relays > GCX Phase Packaged Directional-distance Relay
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GCX Phase Packaged Directional-distance Relay

GCX Phase Packaged Directional-distance Relay

GCX51 is the type designation for a family of single phase, three-zone phase packaged relays. The first - and second-zone distance measurements are made by a unit having a reactance of ohm type characteristic and the third zone has a directional mho characteristic.

GCY51 is the type designation for a family of single phase two-zone and three-zone mho phase distance relays for transmission line protection.

A GCY51F is a single phase mho relay with two zones of protection. The M1 and M2 units have a 75° angle of maximum torque and M1 has provision for 0.5 ohm offset phase to neutral. The M2 unit has provision for a forward offset 0-4 ohms phase to neutral, thus giving a conventional two-zone relay or a distinctive "figure eight" characteristic as required.

The GCXY51 is a single phase, four-zone phase distance relay with two zones or reactance characteristics. A third zone is provided by a unit having a directional mho characteristics, and a fourth zone is provided by a unit with an offset (optional) mho characteristic.

End of life notice: The GCX has been discontinued as of October 1, 2013.
Read full notice.

Applications
  • Low level reverse power flow
  •