Single-phase meter

Abstract

The invention discloses a single-phase meter. The single-phase meter comprises a lower casing, an upper casing connected with the lower casing, a wiring seat, and a relay and a mutual inductor which are mounted in the lower casing, wherein a first incoming terminal, a first outgoing terminal, a second incoming terminal and a second outgoing terminal are sequentially inserted into four terminal jacks from left and right, the first incoming terminal and the first outgoing terminal are connected with the relay, the first incoming terminal comprises an inner connection end and an outer connection end molded at a lower end of the inner connection end, a lead slot is molded at a lower end of the outer connection end, and the lead slot is internally connected with a conductive sleeve ring. The single-phase meter is advantaged in that the mutual inductor is detachable to make the first outgoing terminal directly connect with the relay, the single-phase meter has no superfluous connection nodes, resistance of the first outgoing terminal is reduced, heat is reduced, and service life of the single-phase meter is prolonged.

Description

technical field [0001] The invention belongs to the technical field of electric power, in particular to a single-phase electric 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 t...

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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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