High-voltage vacuum switch fault early warning method and system

Abstract

The invention relates to a high-voltage vacuum switch fault early warning method and system, and the method achieves the detection of a voltage signal and the alarm of an abnormal state after the opening of a high-voltage vacuum switch in a mode of combining a PLC module with an alarm device. Voltage signals output by the high-voltage vacuum switch are subjected to voltage reduction through a transformer, pass through a delay assembly, then are output to a voltage acquisition device and then enter a PLC module, the PLC module judges whether the voltage of each phase exceeds a set voltage threshold value or not, and if the voltage of each phase exceeds the set voltage threshold value, the PLC module outputs the voltage signals to an alarm detection driving device. After the alarm detectiondriving device detects the voltage signals, the alarm detection driving device drives the alarm device to give an alarm, otherwise, no operation is performed.

Description

technical field [0001] The invention relates to a high-voltage vacuum switch fault early warning method and system, belonging to the fields of electric automation maintenance and safe use of high-voltage electric equipment. Background technique [0002] At present, the high-voltage vacuum switch circuit breaker used by most companies is relatively safe and reliable in normal use, and occasionally some mechanical failures may occur. It is precisely because of reliability that it is easy to ignore the possible failure of the switch in daily operation; For example, each furnace steel switch 3 to 10 times, plus the overcurrent switch, the number of operations of each furnace steel switch can reach more than 10 times, when the pull rod connected to the vacuum bag reaches a certain number of times, there may be a certain In the case of phase breakage, when such a fault occurs, the broken phase is not actually separated, and is still in the closed state, that is, it is still in the...

AI Technical Summary

Problems solved by technology

[0002] At present, the high-voltage vacuum switch circuit breaker used by most companies is relatively safe and reliable in normal use, and occasionally some mechanical failures may occur. It is precisely because of reliability that it is easy to ignore the possible failure of the switch in daily operation; For example, each furnace steel opening and closing switch is 3 to 10 times, plus the overcurrent opening, the number of times each furnace steel switch action can reach more than 10 times. When the pull rod connected to the vacuum bag reaches a certain number of actions, a certain In the case of phase breakage, when such a fault occurs, the broken phase is not actually separated, and is still in the closed state, that is, it is still in the charged state, and the internal coils of the transformer are connected, which will cause the three phases to be in charged state

When this kind of fault occurs but is not found in time, if the operator replaces the electrode operation, it may lead to electric shock accidents

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