Abstract
Low-voltage circuit breaker is a electrical switch which is used to connect, break all kinds of power system and to is protected from a malfunction. It is widely used in various types of grid power supply system, with the function of being protected from overload, short circuit and earth leakage fault. When the circuit is overload, short circuit and under voltage, etc. The circuit breaker will be cuted automatically .It is the main original in low-voltage distribution system .It plays a vital role in distribution system .Besides have a variety of traditional protection, intelligent circuit breaker also can display a variety of circuit parameters, a variety of protection action parameters can be displayed, set and modify. Compared with the traditional circuit breaker intelligent circuit has a high cost-effective, and more suitable for the needs of a modern power distribution grid.
The central component of intelligent circuit breaker is intelligent Control Unit.
It bears the various protection of circuit breakers such as alarm, display and control functions.
The subject of this dissertation is to study the intelligent technology of circuit breaker.
PIC single-chip microcomputer as the core, we will be going to introduce the hardware and software design of intelligent circuit breaker. The hardware design is make up of from the smallest single-chip systems, switch input circuit, voltage and current conversion circuit, communications unit, and so on .The MCU is used to complete the calculation and measurement of voltage and current, In order to determine the way of circuit breaker action through the pre-set parameters .
The circuit breaker have the function of communication with PC, host computer can read information on various parameters of circuit breakers, control the work of the state of circuit breakers.
Key words: intelligent circuit breaker, PIC microcontroller, communication
