a power meter

Abstract

The invention discloses an electric energy meter, which comprises a lower housing, an upper housing connected on the lower housing, a wiring base, a relay and a transformer, wherein the relay and the transformer are arranged in the lower housing. Four terminal ports are inserted by a first incoming terminal, a first outgoing terminal, a second incoming terminal and a second outgoing terminal from the left to right in sequence. The first incoming terminal and the first outgoing terminal are connected with the relay; the first incoming terminal comprises an internal connection end and an external connection end formed at the lower end of the internal connection end; a wire slot is formed in the lower end of the external connection end; and the wire slot is internally connected with a conductive sleeve loop. The transformer is a detachable transformer, the first outgoing terminal is allowed to be connected with the relay directly, and no unnecessary connection nodes are provided, thereby reducing resistance of the first outgoing terminal part, reducing heating value and prolonging the service life of the electric energy meter.

Description

technical field [0001] The invention belongs to the technical field of electric power, in particular to an electric energy meter. Background technique [0002] The Chinese Utility Model Patent No. 201320236205.0 proposes a smart meter with an electromagnetic current transformer with antimagnetic structure; the smart meter includes a meter base, a relay, an electromagnetic current transformer, terminal blocks and a primary current transformer. conductor; the electromagnetic current transformer has an annular iron core; the above-mentioned smart meter adopts the axis of the annular iron core of the electromagnetic current transformer to be set perpendicular to the bottom plane of the electric meter base, so that the first iron core of the transformer, the second The magnetic field generated by the second iron core during one pass is perpendicular to the magnetic field generated by the magnet at the bottom of the electric energy meter, and the magnetic field generated by the ma...

AI Technical Summary

Problems solved by technology

[0003] However, when the electric wire is connected to the relay through the electromagnetic current transformer, there will be a connection node at the connection between the electric wire and the electromagnetic current transformer, which increases the resistance value at this place, causes an increase in heat generation, and shortens the above-mentioned intelligence. Service life of the meter

[0004] In addition, the general structure of the connection terminal at the lower part of the electric energy meter is to form a wire slot at the bottom of the connection terminal, and connect a screw on the front side of the connection terminal to clamp the wire in the wire slot, but because the diameter of the wire is always smaller than the wire plug The inner diameter of the groove, so that the outer wall of the wire and the inner wall of the wire slot form a line contact, and the front end of the screw and the outer wall of the wire are only in line contact, so the contact resistance between the wire and the wiring slot is large, and when the current is large, it will lead to wiring. The slot part generates a lot of heat, which accelerates the aging of the electric energy meter components and affects the overall service life of the electric energy meter

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