Intelligent operation device capable of closing and separating brake automatically according to front voltage and miniature circuit breaker of same

Abstract

The invention discloses an intelligent operation device for detecting front voltage and closing and separating a brake automatically according to the front voltage, as well as an automatic-reset abnormal voltage protection intelligent miniature circuit breaker comprising the intelligent operation device. The intelligent operation device comprises an automatic closing power device, an automatic closing power track switch assembly, an automatic closing shield toggle switch assembly, a multifunctional logic control circuit board, an abnormal voltage tripping device (shunt tripping device), a power spring, a power needle and auxiliary contacts. After the intelligent operation device is combined with N pole and L pole of a standard MCB (memory control block), the formed automatic-reset abnormal voltage protection intelligent miniature circuit breaker has overvoltage protection and low-voltage protection functions expect the functions like manual brake closing or separating of a common MCB, overload protection, overcurrent protection and so on; after the abnormal voltage protection is automatically separated, the breaker has automatic-reset and automatic closing functions when the voltage of the system recovers normally; and the automatic closing action meets with that of the safety logic stipulations. With the advantages of simple and compact structure, economical lost, reliable function and wide suitable current range, the intelligent operation device can solve the bottleneck problem that the current abnormal voltage protection products cannot realize closing brakes automatically, or a various production combination scheme for realizing brake closing automatically has high cost, complex structure and large volume.

Description

technical field [0001] The present invention relates to the technical field of low-voltage electrical equipment, in particular to an economical, small-volume, and wide-ranging intelligent operating device that detects front-end voltage and automatically opens and closes accordingly, and includes the intelligent operating device with automatic reset function. Abnormal voltage protection intelligent miniature circuit breaker. Background technique [0002] With the development of intelligent upgrading and transformation of the power grid and its equipment in the country, it is not only necessary for the circuit breaker to protect and automatically open the back-end fault (cause of the customer), but also to protect and open the circuit breaker due to the abnormal fault at the front end. , especially according to the requirements of the GB50096 specification, newly-built houses are suggested to install over-voltage and under-voltage protection devices as much as possible. Howeve...

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Problems solved by technology

[0002] With the development of intelligent upgrading and transformation of the power grid and its equipment in the country, it is not only necessary for the circuit breaker to protect and automatically open the back-end fault (cause of the customer), but also to protect and open the circuit breaker due to the abnormal fault at the front end. , especially according to the requirements of the GB50096 specification, newly-built houses are suggested to install over-voltage and under-voltage protection devices as much as possible. However, in the actual operation process, the existing products on the market have the following defects: either due to over-voltage, The power failure of the undervoltage action (belonging to the front-end fault of the user) cannot automatically close the switch after the front-end voltage returns to normal, which will cause a certain power-off loss to the user, which will cause disputes between the power supply party and the user; The way of combining the accessories of the automatic closing device is due to the large size and high cost, which makes it prohibitive for the power supply side and the design institute to adopt it in a large area

[0003] The combination scheme of miniature circuit breaker + abnormal voltage protection contactor has also appeared on the market, but its fatal disadvantages are (1) the applicable rated current is small, (2) the cost is high; (3) the circuit breaker itself does not have the function of automatic closing ; (4) It is necessary to add additional modules that judge compliance with safety regulations to control and realize automatic closing

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