Electronic type low-pressure distribution transformer fuse case capable of simulating various fuse characteristic curves

Abstract

An electronic type low-pressure distribution transformer fuse case capable of simulating various fuse characteristic curves belongs to the field of emergent protection devices, and comprises a mutual inductor group, circuit breaker switches and a control unit all arranged in a case body, wherein the control unit compares the absolute values of the load current values of various phases of a major loop or the variation trend of load current of the various phases with a settled value of an inverse-time characteristic curve of the fuse, performs the 'trip' or the 'closing' operation control for the circuit breaker switches, outwards outputs the circuit load current, the state of circuit breaker switch and internal environment parameters of the low-pressure distribution transformer fuse case in a digital signal form, remotely transmits the circuit load current, the state of circuit breaker switch and the internal environment parameters of the low-pressure distribution transformer fuse case to a host computer, and is subjected to the remote control by the host computer. The fuse case is suitable for power supply circuits of different standards of fuses, can greatly reduce the purchasing supply amount and storehouse storage of fuse products, reduces the comprehensive running cost, realizes the intelligent upgrade of products, meets the running requirements of an intelligent power grid, and can be widely applied to the field of the intelligent control of a low-pressure power transformation and distribution system.

Description

technical field [0001] The invention belongs to the field of emergency protection circuit devices, in particular to an emergency protection circuit device used in low-voltage power supply and distribution systems. Background technique [0002] With the development of the economy and the improvement of people's living standards, the electricity consumption in cities has increased significantly. At present, there are more and more outdoor pole-mounted transformer installations in the urban 10kV distribution network, and the consumption of matching transformer fuse boxes is also increasing year by year. Increase. [0003] The low-voltage distribution transformer fuse box is one of the important equipment in the outdoor pole transformer device of the low-voltage power distribution network. It is installed between the low-voltage end of the transformer and the low-voltage power grid. Operate its "open" and "close" to realize the input and cut-off operation of the low-voltage pow...

AI Technical Summary

Problems solved by technology

The traditional mechanical distribution transformer fuse box cannot meet the informationization and automation requirements of the smart grid for the distribution network. If it is not improved, it will continue to operate in the smart distribution network. Automatic operation and other automation performance, there are hidden dangers to the stability of the smart grid, which will seriously hinder the process of intelligentization of the low-voltage transmission system

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