[특허]Circuit breaker having serial data communications

Circuit breaker having serial data communications 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	G06F-015/56
출원번호	US-0833637 (1992-02-10)
발명자 / 주소	Farrington Ronald L. (Cedar Rapids IA)
출원인 / 주소	Square D Company (Palatine IL 02)
인용정보	피인용 횟수 : 81 인용 특허 : 0

초록 ▼

A circuit breaker system uses a microprocessor for calculating at least one function of a measured current flow. The microprocessor provides other functions such as serial data stream communications, the ability of many circuit breaker systems to communicate with a central computer, storage of trip information concerning the last trip, storage of historical trip information concerning a number of past trips, EEPROM memory for storing trip information, the microprocessor may inhibit tripping on a high current fault to permit storage of trip information into a memory, power is derived from current transformers drawing energy from current flow to a load and the electronics are protected from high voltage caused by heavy current flow to the load, optical isolators are used for the circuit breaker to communicate with external equipment, a multi-turn resistor adjusts an external test voltage for testing the circuit breaker system, in the event that there is no load or a load drawing insufficient current to provide power for the electronics the circuit breaker may be externally powered to provide readout of electrically erasable programmable read only memory, the microprocessor reads setting switches and a multiplier plug. Also the microprocessor is capable of digitizing selected quantities frequently and of digitizing other quantities less frequently. A second microprocessor permits one microprocessor to sample voltage and current rapidly for metering purposes, and the second microprocessor operates other functions.

대표청구항 ▼

An improved circuit breaker system having a circuit breaker for interrupting electric current flow through at least one conductor from a source of electric energy to a load, the system comprising: means for measuring current flow in said at least one conductor; microprocessor means, responsive to said means for measuring current flow, for calculating at least one quantity from said measured current flow, and said microprocessor means including means for comparing said at least one quantity with at least one predetermined limit value, and including means for disconnecting said load from said source by tripping the circuit breaker in the event that said at least one quantity differs from said at least one predetermined limit value by at least a predetermined difference rating plug means for establishing tripping characteristics of said circuit breaker system; means for said microprocessor means to digitally rad said rating plug means in order to determine said tripping characteristics of said circuit breaker system; and an optionally connectable keypad/display unit having coupling means for electrically coupling the keypad/display unit to the microprocessor means, and having at least one key which is manually engaged by an operator and having means, responsive to said at least one key, for displaying at least one of the tripping characteristics of the circuit breaker system.

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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

내보내기 구분	파일저장 인쇄 메일전송
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Circuit breaker having serial data communications 원문보기

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Circuit breaker having serial data communications 원문보기

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이 특허를 인용한 특허 (81)

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