CN201282027Y

CN201282027Y - Connection device for primary conductor of current transformer

Info

Publication number: CN201282027Y
Application number: CNU2008202332247U
Authority: CN
Inventors: 吴春风; 张逢春; 袁刚; 潘滨; 苏本超
Original assignee: TAIKAI MUTUAL INDUCTOR CO Ltd SHANDONG
Current assignee: TAIKAI MUTUAL INDUCTOR CO Ltd SHANDONG
Priority date: 2008-12-30
Filing date: 2008-12-30
Publication date: 2009-07-29
Anticipated expiration: 2018-12-30

Abstract

A novel device for primary connection between conductors in a current transformer is characterized in that the device transforms the prior method of primary connection between a conductive rod and a terminal strip in the current transformer. The utility model can ensure a sufficient electrical contact area and reduce contact resistance by clamping the conductive rod with a terminal clamp and by tinning an electrical contact area, thereby ensuring a rise in temperature of the terminal position after primary winding for the current transformer.

Description

A kind of current transformer Primary Conductor jockey

(1) technical field:

The utility model is a kind of conducting rod of current transformer Primary Conductor multiturn series connection and the jockey of Primary Conductor, belongs to high voltage electric equipment.

(2) background technology:

According to " GB1208-2006 current transformer " national standard requirement, current transformer each position temperature rise in use can not surpass setting.For winding oil-immersed current transformer that is " U " type, the temperature rise that winding is lifted one's head is the emphasis that will control.Existing screw thread crimping mode can't reliably guarantee contact area under the bigger situation of rated primary current, temperature limit can't finely guarantee.

(3) summary of the invention

For well guaranteeing the temperature rise of current transformer under big current conditions, the utility model provides the jockey of a kind of binding clip and conducting rod clamping connection, can effectively increase contact area, reduce contact resistance, to reduce the temperature rise of product.

The technical solution adopted in the utility model is that the nut that the screw thread and the crimping of conducting rod are used removes, and has increased binding clip.Binding clip strap clamp mouth one end is connected with conducting rod, forms conducting rod and contacts with cylinder between binding clip; The other end is connected with lug plate by bolt, forms the plane contact between binding clip and lug plate.Cylinder contact and plane contact have increased the contact area between each electric conductor, have reduced the heating that causes too greatly because of current density.Each conductive component electric interface adopts zinc-plated processing, has reduced contact resistance, has reduced the heating that causes because of contact resistance.

The beneficial effects of the utility model are by cylinder contact and plane contact, have increased contact area, have reduced the current density of contact-making surface, by the zinc-plated contact resistance that reduced, make current transformer once lift one's head temperature rise control in good range.

(4) description of drawings

Fig. 1 is a structure diagram of the present utility model.

Fig. 2 is a binding clip.

Fig. 3 is the end view of Fig. 2.

1 is conducting rod among the figure, the 2nd, and binding clip, the 3rd, lug plate, the 4th, brace, the 5th, Primary Conductor.

(5) embodiment

Use the processing of novel main parts size, installation to be described further below in conjunction with picture to this.

In Fig. 2: binding clip (3) material is a red copper, and monoblock cast is shaped, and finish by driller's preface in the hole of plane and clamp mouth part.The electric interface of planar section reaches the roughness that needs by the miller preface.Mouth part divides on the basis of the circular hole that casts out in advance, reaches the roughness that needs by the turner preface, forms the folder mouth by the miller preface.The emphasis of the course of processing is roughness and the mouth part position suitable openings size that guarantees each electric interface.Machine the back whole part and carry out zinc-plated processing.

In Fig. 1: binding clip (2) strap clamp mouth one end is connected with conducting rod (1), forms conducting rod (1) and contacts with cylinder between binding clip (2); The other end is connected with lug plate (3) by bolt, forms the plane contact between binding clip (2) and lug plate (3).Primary Conductor (5) is divided 2 circles, lift one's head for totally 4, current path when the current transformer primary current is connected is: electric current is flowed into by a side conducting rod (1), through binding clip (2), lug plate (2) flows into Primary Conductor (5), another lifts one's head outflow by the same circle of correspondence again, through lug plate (4), binding clip (2), conducting rod (1), through outside brace (4), conducting rod (1), binding clip (2), lug plate (3), flow into another circle Primary Conductor (5), another lifts one's head outflow with circle by correspondence again, through lug plate (3), binding clip (2) is flowed out by opposite side conducting rod (1), realizes the series connection of two circle Primary Conductor (5).

Claims

1. a current transformer Primary Conductor jockey mainly is made up of conducting rod, binding clip, lug plate, brace, it is characterized in that binding clip strap clamp mouth one end is connected with conducting rod, and the other end is connected with lug plate by bolt.

2. current transformer Primary Conductor jockey according to claim 1 is characterized in that red copper binding clip folder mouth and each electric interface are provided with tin coating.