Ground potential rise sensors

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United States of America Patent

PATENT NO 9529028
APP PUB NO 20140266249A1
SERIAL NO

13870929

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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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.

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Patent Owner(s)

Patent OwnerAddress
SAN DIEGO GAS & ELECTRIC COMPANY C/O SEMPRA ENERGY101 ASH STREET SAN DIEGO CA 92101-3017

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Cook, William J San Diego, US 11 185
Patton, Phil A San Diego, US 2 1
Rosselli, Girolamo Lakeside, US 3 1

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