An intelligent plastic case circuit breaker

Abstract

The invention provides an intelligent moulded case circuit breaker in allusion to the defect of the current moulded case circuit breaker. The intelligent moulded case circuit breaker is mainly composed of a controller module, a collecting module, a power module and a tripping module. The technical solution used for solving the technical problems comprises the steps: sensing a three-phase power supply circuit through a current transformer by the power module, and connecting a control circuit to control a capacitor to periodically charge / discharge after obtaining the induced current, and obtaining the output voltage; controlling the sampling frequency of the collecting module for the grid signal through the control circuit by the controller module; according to the collected grid data, outputting the logic level signal by the controller module, and controlling the action of the tripping module; and supplying the power to the tripping module and the controller module by the power module. The subsection sampling technology used by the intelligent moulded case circuit breaker is capable of accurately measuring the large signal and small signal at the same time, and improving the sampling precision. The current sampling loop uses the full-wave rectification, and the current generated by the transformer can supply the power to the communication module.

Description

technical field [0001] The invention relates to an intelligent plastic case circuit breaker, which is suitable for a 50-60Hz power grid, which protects lines and power supply equipment from overload, short circuit and grounding faults, and can effectively ensure the safety of low-voltage power distribution grids. An intelligent circuit breaker device with reliable, economical and efficient operation. Background technique [0002] In order to adapt to the increasing capacity of the power grid, the low-voltage power distribution and control system is becoming more and more complex, which puts forward higher requirements for the performance and structure of low-voltage electrical products. To build a smart grid, it must be inseparable from the intelligence of the low-voltage power distribution system and low-voltage electrical components as the basis of the grid, and the core device for control and protection is the circuit breaker, so the intelligence of the molded case circui...

AI Technical Summary

Problems solved by technology

[0003] Although the domestic circuit breaker industry has experienced decades of development, its production and technological level have undergone earth-shaking changes compared with the beginning, but there are still single functions, large measurement errors, and large protection characteristic errors, and users cannot Adjustment, inability to network and remote control and other issues, and looking at the world, the level of circuit breakers of Chinese manufacturers is still in a backward position in the world, and the domestic high-end market has been dominated by foreign companies for a long time. Therefore, it is imperative to develop and produce intelligent low-voltage circuit breakers. In order to achieve the purpose of multi-function, miniaturization, high breaking, accessory modularization, intelligence, communication, and support for fieldbus, it can more effectively guarantee the safety and reliability of the low-voltage distribution network system

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