0.4kV intelligent quick transfer box

Abstract

The invention provides a 0.4kV intelligent quick transfer box, comprising a transfer box body, an incoming cable insertion and removal device, an outgoing cable connecting device, a primary current transformer group and a secondary current transformer group, wherein the incoming cable insertion and removal device is connected with a main power incoming cable and a backup power incoming cable, theprimary current transformer group is connected to the incoming cable insertion and removal device and the outgoing cable connecting device, the secondary current transformer group is connected to theprimary current transformer group and the outgoing cable connecting device, the incoming cable insertion and removal device and the outgoing cable connecting device are respectively connected with a voltmeter, the primary current transformer group, the secondary current transformer group and the voltmeters are all connected with a data processor, and the data processor is connected with a display.The 0.4kV intelligent quick transfer box can reduce power outage time, is convenient in transfer, and has nuclear phase and load detection functions.

Description

technical field [0001] The invention relates to the technical field of power system equipment, in particular to a 0.4kV intelligent fast transfer box. Background technique [0002] The power supply system of the community adopts the American (European) step-down box-type substation, which has two voltage levels of 10kV and 0.4kV. The 10kV side is connected to the 10kV busbar of the 110kV substation passing by the community, and the 0.4kV side is mainly used for the community. Electricity consumption of users and public places in the community. [0003] With the needs of social development and in order to meet the operating regulations of power distribution lines and equipment, it is necessary to replace or increase the capacity of the original box transformer. In the past, the transformer was replaced or repaired after a power outage. Due to the limitation of power outage time , often resulting in poor maintenance quality, high labor intensity, and safety cannot be guarante...

AI Technical Summary

Problems solved by technology

[0009] In order to solve the problem that when multiple AC power sources with different phases or phase sequences are paralleled, a huge current will be generated, which will cause damage to the generator or electrical equipment during the operation process of the bypass without power failure maintenance and replacement of the box transformer. Inconvenience, and when the power supply line is too long, the length of the original outgoing cable is not enough to transfer the power supply. It provides a 0.4kV intelligent fast Transfer box

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