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Procedure and device for remote testing of the coordination of electromagnetic protection devices in an electrical supply system
Procedure and device for remote testing of the coordination of electromagnetic protection devices in an electrical supply system
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机译:远程测试供电系统中电磁保护装置协调性的程序和装置
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摘要
Coordination of the overcurrent/time trip characteristics of a hierarchy of overcurrent protection devices (25a-g) is accomplished through a central tester (41) which establishes a pattern of test currents for the individual overcurrent protection devices which simulates a fault at a specified location in the power system (1). The individual assigned test currents are transmitted over a communications link (43) to the separate overcurrent protection devices (25a-g) where they are stored in memory (33a-g). The central tester (41) then broadcasts a test signal which simultaneously initiates testing of all of the overcurrent protection devices (25a-g) using the assigned test currents stored in memory. The trip times are recorded and reported back to the central tester (41) for analysis. IMAGE
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