Digital Energy > Protection & Control > Pilot and Distance Relays > GCY Phase Packaged Directional-distance relay
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GCY Phase Packaged Directional-distance relay

GCY 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, a

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

Applications
  • Long transmission lines
  • Protection and Control
  • Directional Mho phase distance
  • Offset Mho
  •