Switching type phase sequence switching combined conjunction box

Abstract

The invention aims at providing a switching type phase sequence switching combined conjunction box, and relates to the power field. The switching type phase sequence switching combined conjunction boxcomprises a conjunction box body, a box cover, a wiring board arranged in the conjunction box body and provided with three voltage and current wiring blocks, and a phase sequence switching switch electrically connected to the first and third voltage and current wiring blocks. Each of the first and third voltage and current wiring blocks comprises an electrical connection assembly and a switchingassembly; the electrical connection assembly comprises a voltage electrical connection column and middle, left and right current electrical connection columns; the switching assembly comprises a voltage switching terminal and left and right current switching terminals; and the middle electrical connection column is electrically connected with the right / left current electrical connection column. When being used for phase sequence adjustment, the switching type phase sequence switching combined conjunction box does not influence power utilization of users, and is higher in phase switching efficiency and higher in safety level.

Description

technical field [0001] The invention relates to the field of electric power, in particular to a switch type phase sequence switching combined junction box. Background technique [0002] The combined junction box for electric energy metering is mainly suitable for three-phase three-wire or three-phase four-wire electric energy metering circuits that need to be connected through current transformers. By installing the combined junction box and the secondary circuit (voltage secondary circuit and current secondary circuit) joint wiring of the electric energy meter, it is possible to conveniently and safely check the electric meter on site when it is under load, and disassemble and install the meter under the charged state to ensure During the operation process, the open circuit of the secondary circuit of the current and the short circuit of the secondary circuit of the voltage can be prevented, and the economic loss caused by the power failure caused by pulling down the load s...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the existence of the current joint junction box for electric energy metering. When the joint wiring has a reverse phase sequence error, it is necessary to switch the wiring of any two phases at the end of the electric energy meter to adjust the phase sequence of the electric energy meter, which will affect the user. In order to solve the shortcomings of low efficiency and poor safety in electricity consumption and commutation wiring, a switch-type phase sequence switching joint junction box with high commutation efficiency and good safety is provided without affecting the user's power consumption when adjusting the phase sequence

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