H - Electricity – 02 – H
Patent
H - Electricity
02
H
348/24
H02H 7/26 (2006.01) H02H 3/30 (2006.01)
Patent
CA 1139415
ABSTRACT OF THE DISCLOSURE At each of terminal connected to a protected line section a current is sampled at an identical high sampling frequency, digitized, encoded and transmitted to an associate one of the terminals with the digitized data resistered in a first buffer memory. Those processes are conducted under the control of respective clock pulses. Also a receiver receives similar data from the associated terminal. The received data are decoded and registered in a second buffer memory under the control of control signals from the receiver A shift register successively receives the data from the first buffer memory and shifts them through it under the control of a shifting pulse to compensate for a known transmission delay between the data in the two buffer memories. The shift register and the second buffer memory write respective data into a processing unit in response to a writing pulse having a pulse width of a sampling pulse multiplied by an integer from the processing unit. The processing unit compares two sets of data with each other to determine if a fault occurs within the protected section.
373642
Goda Tadahiro
Maeda Kouji
Marks & Clerk
Mitsubishi Denki Kabushiki Kaisha
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