A vacuum circuit breaker
A vacuum circuit breaker, on-off technology, applied in the field of electric power industry, can solve the problems of reducing the reliability and breakdown of vacuum circuit breakers, and achieve the effect of reducing the possibility, protecting safety and improving reliability
Active Publication Date: 2017-01-18
STATE GRID CORP OF CHINA +2
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Problems solved by technology
[0003] However, the existing vacuum circuit breaker needs to be powered by an external power supply, so that high voltage voltage appears in the switching circuit, and there is a possibility of high voltage breakdown, which reduces the reliability of the vacuum circuit breaker
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[0048] The following will clearly and completely describe the technical solutions in the embodiments of the application with reference to the drawings in the embodiments of the application. Apparently, the described embodiments are only some of the embodiments of the application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.
[0049] refer to figure 1 , which is a structural schematic diagram of a vacuum circuit breaker provided in this application, wherein the vacuum circuit breaker may include:
[0050] Connect with the 10KV power grid structure, receive the three-phase output current and zero-sequence current of the 10KV power grid structure, and logically quantify the three-phase output current and the zero-sequence current in turn to obtain three-phase analog quantities and zero-sequence analog quant...
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The invention provides a vacuum circuit breaker which comprises a current collector, a protection controller, an actuator and a current induction power supply, wherein the current collector is used for receiving a three-phase output current and a zero-sequence current of a 10KV power network structure, and sequentially carrying out logic quantification on the three-phase output current and the zero-sequence current to obtain a three-phase analog quantity and a zero-sequence analog quantity; the protection controller is connected with the current collector, and used for receiving the three-phase analog quantity and the zero-sequence analog quantity and respectively detecting the three-phase analog quantity and the zero-sequence analog quantity to obtain detection results; the actuator is respectively connected with a gate and the protection controller, and used for receiving the detection results and controlling the opening and closing of the gate according to the detection results; and the current induction power supply is respectively connected with the current collector, the protection controller and the actuator, and used for acquiring an induction current on a current mutual inductor in the current collector and supplying power to the protection controller and the actuator according to the induction current.
Description
technical field [0001] The present application relates to the technical field of electric power industry, in particular to a vacuum circuit breaker. Background technique [0002] In urban and rural power grids, vacuum circuit breakers are usually used as the detection and protection device for the boundary switch gate between the 10KV outdoor overhead line and the user to protect the user from overcurrent and inrush current protection, and to avoid the three-phase imbalance of the user's power load and the user's power consumption. Equipment and distribution line failures affect the normal operation of the entire grid. [0003] However, the existing vacuum circuit breaker needs to be powered by an external power supply, so that a high voltage voltage appears in the switching circuit, and there is a possibility of high voltage breakdown, which reduces the reliability of the vacuum circuit breaker. Contents of the invention [0004] The technical problem to be solved in thi...
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IPC IPC(8): H02H1/06H02H3/02
Inventor 陈建武毛以平
Owner STATE GRID CORP OF CHINA