| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method for conducting a protective cooperation test of a plurality of stages of protective relays which easily and surely confirms an operation test conducted by a relay test in a close to actual operation, by cooperating with a plurality of the stages of the protective relays, and to provide its tester. <P>SOLUTION: In the cooperation test of a plurality of the upper and lower protective relays 2, 3 in a power transmission system, relay testers 4, 5 are connected to the protective relays 2, 3. Protective cooperation testers 6 or 7 are connected to the relay testers 4, 5 so as to control operations of the relay testers 4, 5. The protective cooperation testers are interconnected by signal lines 6a, 7a so as to control the operations of the relay testers 4, 5 by using one of the protective cooperation testers 6 or 7, and a cooperative operation test between protective relays is conducted, by carrying a test current from the relay testers 4, 5 to the protective relays 2, 3. <P>COPYRIGHT: (C)2010,JPO&INPIT |
