Test method for protection trip outlet circuit
A loop test and tripping technology, applied in circuit breaker testing, measuring devices, instruments, etc., can solve the problem of inability to verify whether there is a parasitic circuit trip contact in the tripping outlet circuit, and achieve the effect of ensuring correctness
Inactive Publication Date: 2011-12-21
ELECTRIC POWER SCI RES INST OF GUIZHOU POWER GRID CO LTD
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Problems solved by technology
[0003] The technical problem to be solved by the present invention is to provide a test method for protection trip outlet circuits to overcome the existing problems in the prior art that it is impossible to verify whether there is a parasitic circuit between the trip outlet circuits and whether a trip contact will pass through the trip pressure plate of other trip outlet circuits. Insufficient export etc.
Method used
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Embodiment Construction
[0009] Embodiments of the present invention: the test method of the present invention changes the second step of the existing test method, that is, when withdrawing from the tripping pressure plate of the trip outlet circuit, all other tripping pressure plates are put into operation to allow the protection device to act. At this time, use a multimeter to measure that the trip outlet circuit is blocked, so that it can be proved that the trip contact of the trip outlet circuit will not pass through the trip pressure plate outlet of other trip outlet circuits, and there is no parasitic circuit between the trip outlet circuits, that is, it is judged as qualified; Use a multimeter to measure that the trip outlet circuit is open, so that it can be proved that the trip contact of the trip outlet circuit may pass through the trip pressure plate outlet of other trip outlet circuits, and there is a parasitic circuit between the trip outlet circuits, which is judged as unqualified.
[001...
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The invention discloses a test method for a protection trip outlet circuit, which includes the following steps: first step, put into any trip pressure plate of a trip outlet circuit, let the protection device act, and use a multimeter to measure that the trip outlet circuit is open; In the second step, while exiting the tripping pressure plate of the tripping exit circuit, put in all other tripping pressure plates, let the protection device operate again, measure the tripping exit circuit with a multimeter, and according to the two conditions of the tripping exit circuit, respectively, It is judged whether the trip contact of the trip outlet circuit will pass through the trip pressure plate outlet of other trip outlet circuits, and whether there is a parasitic circuit between the trip circuits. In the second step, use a multimeter to measure that the trip outlet circuit is blocked, then it is judged that the trip contact of the trip outlet circuit will not pass through the trip pressure plate outlet of other trip outlet circuits, and there is no parasitic circuit between the trip circuits, that is, the test result is judged is qualified.
Description
technical field [0001] The invention relates to a test method for a trip outlet circuit of a relay protection device. Background technique [0002] The tripping contact of the relay protection device is connected in series with the tripping pressure plate to form a tripping outlet circuit. A tripping contact can only be connected in series with one tripping pressure plate, and there must be no parasitic circuit with other tripping outlet circuits. The correctness of the trip outlet circuit should be checked during commissioning. The usual inspection method is: first, put in the trip pressure plate of a certain trip outlet circuit to let the protection device operate. At this time, use a multimeter to measure that the trip outlet circuit is open. The first step is to exit the tripping pressure plate of the tripping outlet circuit, and let the protection device operate again. At this time, use a multimeter to measure that the tripping outlet circuit is blocked, and the test re...
Claims
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IPC IPC(8): G01R31/02G01R31/327
Inventor 邵梦桥
Owner ELECTRIC POWER SCI RES INST OF GUIZHOU POWER GRID CO LTD