GROUND POTENTIAL RISE SENSORS

摘要

Ground Potential Rise (GPR) sensors measure the GPR between the ground grid and the remote earth. A GPR sensor may provide a GPR measurement to an existing distance protection, which may operate based on this measurement automatically. A GPR sensor may comprise a potential transformer configured such that one wire of the high voltage side of the potential transformer is coupled to the ground grid of a substation. The second wire of the potential transformer is coupled to an insulated wire which is coupled to a ground rod or multiple of ground rods bonded together, that is driven into the earth. The low voltage side of the potential transformer is used to connect Distance Relays, Voltage Relays, DFR or Alarms,

主权项

1. A ground potential rise sensor configured to measure ground potential rise of a substation, comprising:
a potential transformer, a first side of the potential transformer coupled to the substation ground grid and a second side of the potential transformer coupled to a first end of a wire; and the wire, the second end of the wire coupled to a ground rod.