Novel variable ratio adjustable circuit breaker

Abstract

The invention discloses a novel variable ratio adjustable circuit breaker. The circuit breaker comprises a boundary breaker body and a control terminal, the boundary breaker body is electrically connected with the control terminal through a cable, a voltage transformer is arranged outside the boundary breaker body, a variable ratio adjustable current transformer, a manual switch-on-off switch, anelectric switch-on-off switch and an energy storage motor are arranged in the boundary breaker body, the control terminal comprises a control panel and a control mainframe, and the control terminal isconnected with the voltage transformer and the current transformer through cables; the novel variable ratio adjustable circuit breaker has the advantages that the circuit breaker can be selected whenthe current is 1-200 amperes, not only can greatly reduce the number of power outages, but also can reduce the labor intensity of workers at the production line, and the social benefits are also veryconsiderable.

Description

technical field [0001] The invention relates to the technical field of relay protection, in particular to a novel circuit breaker with adjustable transformation ratio. Background technique [0002] With the rapid development of the power grid, the requirements for the reliability of safe power supply are getting higher and higher. The power sector takes effective control measures for the weak links in the operation of the power grid, and does everything possible to reduce accidental power outages and reduce the scope of power outages. However, the safe operation of 10 kV power distribution lines is directly affected by the surrounding environment and climatic conditions due to the open-air erection, which has the problems of high accident rate, difficulty in finding accidents, and poor safety and reliability. Some users in remote mountainous areas with long overhead lines are often affected by bad weather and cannot use electricity normally. In addition, after the current t...

AI Technical Summary

Problems solved by technology

However, the safe operation of 10 kV power distribution lines is directly affected by the surrounding environment and climatic conditions due to the open-air erection, which has the problems of high accident rate, difficulty in finding accidents, and poor safety and reliability.

Some users in remote mountainous areas with long overhead lines are often affected by bad weather and cannot use electricity normally

In addition, after the current transformer of the old-fashioned distribution circuit breaker is selected, if the transformation ratio of the current transformer needs to be changed, the power must be cut off to change, and the 200A current transformer can only be selected with a minimum of 100 / 5.

[0003] The document with the publication number CN 106451787 A discloses an intelligent boundary circuit breaker control system consisting of a signal acquisition and conditioning module, a boundary circuit breaker control circuit, a radio frequency communication module, a remote communication and control module, and a drive control output and execution module. The boundary circuit breaker control circuit is respectively connected with the signal acquisition and conditioning module, the radio frequency communication module, the remote communication and control module, and the drive control output and execution module. Although this document improves the line overload capacity, it is beneficial to the safety and Stable operation, but this document cannot realize that the variable ratio of the current transformer is not adjustable, the current cannot realize intelligent variable ratio, and the intelligent boundary circuit breaker control system cannot realize intelligent alarm in the form of mobile phone text messages, which needs to be further improved

[0004] The document with the publication number CN 101741060 A discloses a boundary circuit breaker device, which includes a high-voltage vacuum boundary circuit breaker body and an intelligent protection terminal. A zero-sequence current transformer and two current transformers are built in the high-voltage vacuum boundary circuit breaker body. The voltage transformer is installed on the power side of the high-voltage vacuum boundary circuit breaker body. The intelligent protection terminal located on the on-site distribution line is divided into two parts: the protection device for protecting the distribution line and measuring the operating status of the distribution line, and the GPRS communication module. The device is directly connected to the high-voltage vacuum boundary circuit breaker body through a fully sealed waterproof aviation connector and an outdoor sealed cable, and connected to the GPRS communication module through a serial interface. The operating power and voltage signals of the intelligent protection terminal and the high-voltage vacuum boundary circuit breaker body are the same. It is provided by the voltage transformer, but the current transformer of this device cannot realize the intelligent variable ratio adjustment, the current ratio is a fixed value, and the intelligent current variable ratio cannot be realized, and the current intelligent variable ratio needs to be improved

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