Override trip prevention protection method and device
A tripping protection and leapfrog tripping technology, which is applied to emergency protection circuit devices, emergency protection devices with automatic disconnection, circuit devices, etc., can solve hidden dangers in power distribution systems, leapfrog tripping, and it is difficult to achieve step-by-step detection of power distribution circuits, etc. problems, to achieve the effect of improving safety and reliability, ensuring safety, and avoiding skipping trip accidents
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Embodiment 1
[0030] figure 1 It is a flow chart of the method for preventing over-level tripping protection provided by Embodiment 1 of the present invention. Such as figure 1 As shown, the method for preventing over-level trip protection provided by the embodiment of the present invention is used for over-level trip protection of multi-level power distribution circuits, including the following steps:
[0031] S101, when it is detected that the current in the final power distribution circuit exceeds the set instantaneous current, instruct the circuit breaker in the final power distribution circuit to trip;
[0032] S102, after waiting for the set interval time T, the upper-level power distribution circuit continues to detect the current in the distribution circuit, and when it detects that the current in the own-level circuit exceeds the set instantaneous current, instruct the current-level circuit breaker to trip .
[0033] In the low-voltage power distribution system of this embodimen...
Embodiment 2
[0038] image 3 It is a flow chart of the method for preventing over-level tripping provided by Embodiment 2 of the present invention. Such as image 3 As shown, the method for preventing over-level trip protection provided by the embodiment of the present invention is used for over-level trip protection of multi-level power distribution circuits, including the following steps:
[0039] S201, when it is detected that the current in the final power distribution circuit exceeds the set instantaneous current, instruct the circuit breaker in the final power distribution circuit to trip;
[0040] S202, after waiting for the set interval time T, the upper-level power distribution circuit continues to detect the current in the power distribution circuit, and when it detects that the current in the own-level circuit exceeds the set instantaneous current, instruct the current-level circuit breaker to trip ;
[0041]S203, when tripping in the final power distribution circuit, it also...
Embodiment 3
[0047] This embodiment provides an anti-override trip protection device, which includes:
[0048] The first tripping module 301, the first tripping module 301 is used to instruct the circuit breaker to trip when it is detected that the current in the final power distribution circuit exceeds the set instantaneous current;
[0049] The second trip module 302, the second trip module 302 is used to detect the current in the upper power distribution circuit, when it is detected that the current in the upper power distribution circuit exceeds the set instantaneous current, wait for the set interval After time T, instruct the circuit breaker at the same level to trip;
[0050] A time recording module 303, the time recording module 303 is used to record the trip time T0 in the final power distribution circuit when tripping is performed in the final power distribution circuit, and the trip time T0 needs to be less than 200ms, that is, T0<200ms; and The sum of the tripping time T0 and ...
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