Split type three-phase three-wire high-voltage electric energy metering box

Abstract

The invention discloses a split type three-phase three-wire high-voltage electric energy metering box that comprises two single-phase combined transformers; the single-phase combined mutual inductor comprises a power supply end, a load end and a B-phase voltage end which are connected with a high-voltage power grid. The two single-phase combined transformers are independently packaged and can be interchanged; when the two single-phase combined transformers are exchanged, the connection directions of the power supply end, the load end and the B-phase voltage end and leads of the power supply, the load and a B-phase line of the high-voltage power grid are unchanged; the two B-phase voltage ends are still connected with the B-phase line of the high-voltage power grid through the lead betweenthe two single-phase combined transformers; the three-phase three-wire high-voltage electric energy metering box is formed by combining two independently packaged single-phase combined transformer single bodies with the same appearance structure and internal connection, so that electric energy metering is realized, the weight of the mounting single body of the metering box is greatly reduced, andthe mounting is light and convenient.

Description

[technical field] [0001] The invention relates to measuring instruments and meters, in particular to a split-type three-phase three-wire high-voltage electric energy metering box. [Background technique] [0002] Electric energy metering is the basis for the economic calculation and calculation of electricity charges in all links of the power grid. The three-phase three-wire high-voltage electric energy metering box is a high-voltage metering device that is widely used in 6kV ~ 10kV high-voltage power grids. It is generally composed of two voltage transformers and two Two current transformers are combined and packaged into one body, so they have the characteristics of compact structure. However, since the invention, when one of the four transformers is damaged, the entire metering box will be completely scrapped, resulting in waste. At that time, the equipment was still relatively heavy, and it was inconvenient to install on outdoor stands and columns. [0003] For example, ...

AI Technical Summary

Problems solved by technology

[0002] Electric energy metering is the basis for the economic calculation and calculation of electricity charges in all links of the power grid. The three-phase three-wire high-voltage electric energy metering box is a high-voltage metering device that is widely used in 6kV ~ 10kV high-voltage power grids. It is generally composed of two voltage transformers and two Two current transformers are combined and packaged into one body, so they have the characteristics of compact structure. However, since the invention, when one of the four transformers is damaged, the entire metering box will be completely scrapped, resulting in waste. The equipment is still relatively heavy, and it is inconvenient to install on the outdoor stand and column.

[0003] For example, the Chinese invention patent "An outdoor two-element three-phase power metering box with protection publication number is CN108535525A, application date: July 5, 2018", although the product and related electrical equipment can be protected by installing a fuse, but there is no It can solve the problems of overall replacement and inconvenient installation after failure

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