Contact point monitoring device for vacuum circuit breaker, and vacuum circuit breaker comprising same
A vacuum circuit breaker and monitoring device technology, which is applied to high-voltage air circuit breakers, measuring devices, emergency protection devices, etc., can solve the problems of wear of fixed contacts or movable contacts, short-term performance of vacuum interrupters, short-circuit performance and Improve the reliability and performance of problems such as the decline of power-on performance
Pending Publication Date: 2021-09-24
LS ELECTRIC CO LTD
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AI Technical Summary
Problems solved by technology
[0006] However, when the current breaking operation of the vacuum interrupter is repeated, there is a problem that the fixed contacts or the movable contacts (hereinafter collectively referred to as "contacts") are gradually worn out.
Moreover, when the degree of contact wear exceeds the critical point, the short-term performance, short-circuit performance and electrical performance of the vacuum interrupter will be reduced.
Method used
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Embodiment approach
[0088] In the above, an example in which the identification label is composed of two regions having contrasting shadings has been described. However, the identification tag can also have a different form.
[0089] Image 6 is a schematic diagram showing the identification label of the contact detection device according to the second embodiment of the present invention.
[0090] The identification label 700' of the contact detection device according to the second embodiment of the present invention may be made in a gradient color form without clearly dividing the area. When the identification label 700' is configured in a gradient color form, the reflectance gradually changes, so the current value of the reflected light also gradually changes.
[0091] The gray scale map of the identification tag 700' can be considered in the preset different levels by considering the breaking state (open circuit position 710') before the initial push, the distance that the rod housing 210 ri...
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The present invention provides a contact point monitoring device for a vacuum circuit breaker comprising: a vacuum arc extinguish chamber and a push rod assembly, and the vacuum arc extinguish chamber comprises a fixed electrode fixed in an insulating container, a fixed contact arranged at one end of the fixed electrode, a movable electrode which is installed in the insulated container and is movable in the upward or downward direction; a vacuum interrupter which is disposed at one end of the movable electrode and includes a movable contact point coming into contact with or separated from the fixed contact point; and a pushrod assembly which is coupled to the other end of the movable electrode and allows the movable electrode to move upwards or downwards. The contact point monitoring device comprises: a differentiation sticker which is attached to the outer circumferential surface of a cylindrical rod housing of the pushrod assembly; and a sensor assembly which is adjacent to the pushrod assembly, monitors the position of the differentiation sticker, and has a different sensing direction to the movement displacement of the pushrod assembly.
Description
technical field [0001] The invention relates to a contact monitoring device for a vacuum circuit breaker and a vacuum circuit breaker comprising the device. Background technique [0002] A vacuum circuit breaker is an electrical protector that uses the dielectric strength of vacuum to protect load equipment and lines from fault current when a short circuit occurs in a circuit or a fault occurs in grounding, etc. [0003] Vacuum circuit breakers play a role in power transmission control and protection of power systems. Vacuum circuit breakers have large breaking capacity, high reliability and safety. Moreover, the vacuum circuit breaker can also be installed in a small installation space, so it can be easily applied to medium voltage or even high voltage. [0004] The vacuum circuit breaker includes: a vacuum interrupter that breaks current, a power transmission device that transmits power to the vacuum interrupter, and uses the power transmission device to reciprocate up a...
Claims
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IPC IPC(8): H01H33/662H01H33/664G01J1/02
CPCH01H33/666H01H1/0015H01H11/0062H01H2071/044H01H33/662H01H33/664H01H33/6661
Inventor 徐民圭
Owner LS ELECTRIC CO LTD