H - Electricity – 02 – H
Patent
H - Electricity
02
H
348/22
H02H 7/26 (2006.01) H02H 3/30 (2006.01)
Patent
CA 1269165
ABSTRACT OF THE DISCLOSURE Direct transfer trip apparatus for sharing a common active communication channel utilized for signal transfer between at least two electromechanical units which form a current differential protective relay for protecting at least one power line in a power system network is disclosed. Each electromechanical unit includes an operat- ing relay coil for effecting an interruption of current through the protected power line when an internal fault of the power line is detected. The direct transfer trip function induces signals to be transmitted through the common active communication channel either upstream or downstream from a faulted power line section where a breaker has failed to open. These direct transfer trip signals are supplied directly to an upstream or downstream breaker unit to operate the breaker to interrupt current through the faulted section independent of the energization of its corresponding operating relay coil. The direct transfer trip apparatus not only performs the aforemen- tioned direct transfer trip function, but also permits disabling of the operating relay coil from effecting a power line interruption inadvertently. Accordingly, an inadvertent current interruption of the power line section by a corresponding operating relay coil is precluded during the transmission of the direct transfer trip signal over the common active communication channel.
523969
Chyi Sun Shan
Gonnam Russell Woodbury
Swabey Ogilvy Renault
Westinghouse Electric Corporation
LandOfFree
Direct transfer trip apparatus for use with an active pilot... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Direct transfer trip apparatus for use with an active pilot..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Direct transfer trip apparatus for use with an active pilot... will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1248333