Manganin shunt for three-phase smart energy meter and its application

Abstract

A manganin shunt for a three-phase smart electric energy meter and its application, comprising a conductive sheet and a manganin sheet, the conductive sheet includes a conductive sheet 1 and a conductive sheet 2, the conductive sheet 1, the manganin sheet, and the conductive sheet 2 Connected in sequence and on the same plane; the upper edge of the conductive sheet one is provided with a sampling connection end 1, and the upper edge of the conductive sheet 2 is provided with a sampling connection end 2; the upper edge of the conductive sheet 2 is provided with a sampling connection end 2; Terminal 1 and sampling connection terminal 2 are connected to the electric meter circuit board through the acquisition signal line; the outer sides of the sampling connection terminal 1 and sampling connection terminal 2 are socketed with hollow coil 1 and hollow coil 2. The manganese-copper shunt of the three-phase intelligent electric energy meter and its application according to the present invention have simple structure, good anti-industrial magnetic interference effect, reduce the influence of the magnetic field on the current sampling signal, and have high measurement accuracy of the three-phase intelligent electric energy meter. And long service life, widely used.

Description

technical field [0001] The invention belongs to the technical field of shunts, and in particular relates to a manganin shunt for a three-phase intelligent electric energy meter and an application thereof. Background technique [0002] The electronic watt-hour meter samples the voltage and current of the user's power supply in real time, and uses a dedicated watt-hour meter integrated circuit to process the sampled voltage and current signals and multiply them to convert them into pulse outputs proportional to the electric energy. The physical instrument shown on the monitor. [0003] With the comprehensive construction of the smart grid, the number of smart energy meters installed in the world will reach 300 million in the next five years. At present, more than 90% of the three-phase smart energy meters on the market use electromagnetic transformers (CT) as current sampling. Devices, the measurement accuracy of this type of ammeter is easily disturbed by external strong mag...

AI Technical Summary

Problems solved by technology

The device resists the power-frequency magnetic field through the anti-magnetic sleeve and the anti-magnetic layer. The anti-power-frequency magnetic field effect is weak, and the service life of the anti-magnetic sleeve and the anti-magnetic layer is short.

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