A smart meter with anti-interference electromagnetic current transformer that can be quickly installed and removed

Abstract

The invention discloses an anti-interference electromagnetic-current-transformer-contained intelligent electric meter with the characteristic of rapid mounting and dismounting. A current transformer cavity is arranged inside a meter housing; and a plugging port is formed in the side of the current transformer cavity. An integrated current transformer is arranged in the current transformer cavity; leading-out terminals of wiring switches are connected with a conductor wire arranged inside the integrated current transformer and the other end of the conductor wire is connected with a relay. The integrated current transformer includes a heat-radiating shielding box; current transformer units are arranged in the heat-radiating shielding box uniformly; two wiring terminals of the current transformer units are connected fine elastic contacts connected with a reading mechanism; coarse elastic contacts are arranged at the two ends of the conductor wire; the fine elastic contacts and the coarse elastic contacts are arranged on the bottom surface of the heat-radiating shielding box uniformly; and sliding sides arranged at the two sides of the heat-radiating shielding box. With the electric meter, the interference on the electric meter reading number by an external magnetic field can be effectively prevented; the assembling speed and maintenance speed of the electric meter can be substantially improved; and the current transformer in the electric meter can be replaced and used repeatedly, so that the service life of the electric meter is prolonged.

Description

Technical field [0001] The invention belongs to the technical field of electric meters, and is specifically a smart electric meter with an anti-interference electromagnetic current transformer that can be quickly assembled and disassembled. Background technique [0002] An electric meter is a meter used to measure electrical energy, which is widely used in the power industry. Smart meters have the following requirements for magnetic interference from external constant magnetic field to electromagnetic current transformer (CT) sampling: 300mT magnet interferes at the bottom of the meter, and the deviation of meter measurement accuracy (CT sampling accuracy) should be ≤2%. Existing smart meters such as figure 1 As shown, the structure of this smart meter is that the external network wire passes through the current transformer 32 through the wire connector 31 and is connected to the original relay 33 and exported. The induction wire of the current transformer 32 is connected to the ...

AI Technical Summary

Problems solved by technology

The current transformer in the existing smart meter is exposed and fixed in the meter, which is very susceptible to interference from an external magnetic field, causing errors in current readings and reducing the accuracy of power readings

Since the current transformer needs to be fixed on the meter during installation, and its induction wire needs to be connected with the reading mechanism of the meter, the assembly process is complicated and the assembly speed is slow, which reduces the production efficiency

If the current transformer is damaged, it is difficult to repair the meter, and the user can only replace a new meter, which leads to a waste of resources

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