Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1997-07-23
2000-01-04
Wu, Daniel J.
Communications: electrical
Condition responsive indicating system
Specific condition
340636, 340638, 340657, 361 35, 361 78, G08B 2100
Patent
active
060114800
ABSTRACT:
The system for determining protection quality of a protective relay and related functions of the protection system include obtaining information concerning the output status of the various protective elements in the relay. The status of various operations in the protective element are also evaluated against specific standards. The operation of supervisory and control elements affecting the action protective elements are also evaluated. Other aspects of the relay, including the availability of the relay and the operation of the voltage and current transformers are also evaluated. In addition, associated aspects such as the status of the communication channels, the station voltage availability and the condition of the trip and close circuits are monitored. All of the above is analyzed in a summary report to provide an indication of protection quality for the relay and associated protection system functions.
REFERENCES:
patent: 4591940 (1986-05-01), Sun et al.
patent: 5243291 (1993-09-01), Umemura
patent: 5751532 (1998-05-01), Kanuchok et al.
patent: 5763961 (1998-06-01), Dreyer et al.
Roberts Jeffrey B.
Schweitzer, III Edmund O.
Schweitzer Engineering Laboratories Inc.
Wu Daniel J.
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