CN1301515C

CN1301515C - All-dry capacity type high voltage current transformer

Info

Publication number: CN1301515C
Application number: CNB2004100670442A
Authority: CN
Inventors: 胡培中
Original assignee: NINGBO SAN'AI TRANSFORMER CO Ltd
Current assignee: NINGBO SAN'AI TRANSFORMER CO Ltd
Priority date: 2004-10-09
Filing date: 2004-10-09
Publication date: 2007-02-21
Anticipated expiration: 2024-10-09
Also published as: CN1601671A

Abstract

The present invention relates to a fully dry type capacity type high voltage and current mutual inductor which comprises a box body, wherein the box body is arranged at the bottom; a secondary coil is arranged in the box body and a secondary connecting box is arranged outside the box body; the secondary connecting box is connected with a U-shaped primary conductor; an ordinary steel tube for enhancing the rigidity is inserted in an inner hole of a copper tube or an aluminum tube of the primary conductor; a capacitance insulating layer is covered on the primary conductor, and a silicon rubber umbrella skirt is covered on the capacitance insulating layer; the primary conductor is provided with a wire connecting terminal and a stiffening plate which enhances the mechanical strength of a primary capacitor core. The present invention is characterized in that the ordinary steel tube for enhancing the rigidity is inserted in the inner hole of the copper tube or the aluminum tube of the primary conductor, and the capacitance insulating layer is directly covered on the primary conductor and is coated with solidified special paint. The present invention has the advantages that the capacitor core has good mechanical strength, and the product costs is lowered; the present invention does not run off the solidified special paint, and enhances the stability of electrical properties.

Description

All-dry capacity type high voltage current transformer

Technical field

The present invention relates to a kind of a kind of high-tension current inductor that belongs to, particularly relate to a kind of its capacitor type insulating and directly surround the real all-dry capacity type high voltage current transformer that Primary Conductor is outer, the capacitive insulation interlayer scribbles the special coating that can solidify.

Background technology

Existing capacity type high voltage current transformer for get rid of capacitor type insulating layer by layer between the coating used of air gap be organic silicone oil, it does not solidify, in manufacture process and in the use of later product, silicone oil may run off, thereby influence the stability of product electric property, strictly speaking this product can not be called the dry type product, can only be the half dry type product; Though also be called Dry Type High Tension Current Transformer usually.

In addition, the Primary Conductor of existing capacity type high voltage current transformer product is with stainless steel tube outward, in order to strengthen the mechanical strength of a capacitor core except that copper pipe, copper rod or cable; The capacity type high voltage current transformer that has has been cancelled this stainless steel tube, and reducing cost, but this is certain to influence the mechanical strength of capacitor core.

Summary of the invention

Purpose of the present invention is exactly in order to overcome above-mentioned weak point of the prior art, provides that a kind of electric property is relatively stable, product cost is lower, can increase the all-dry capacity type high voltage current transformer of the mechanical strength of a capacitor core again.

The objective of the invention is by providing a kind of all-dry capacity type high voltage current transformer to realize with following structure, it comprises the casing that is arranged on the bottom, described box house is mounted with secondary coil, the secondary connection box is equipped with in described casing outside, described secondary connection box connects the Primary Conductor of one " U " font, the external diameter of described " U " font Primary Conductor is provided with the capacitive insulation layer, the outside of described capacitive insulation layer is set with or directly is cast with the full skirt of silicon rubber, and end device has binding post on the described Primary Conductor.

The copper pipe of described Primary Conductor or aluminum pipe internal diameter insert one and strengthen the common steel tube that rigidity is used, and described capacitive insulation scribbles layer by layer and can solidify the special coating that can't run off.The prescription of the special coating that described capacitive insulation is coated with layer by layer is

80～120 parts of M component organic silicon gel weight;

80～120 parts of N component organic silicon gel weight;

0～200 part of methyl-silicone oil 500cs weight.

Methyl-silicone oil in the prescription is not participated in curing, but no longer runs off behind paint solidification yet.It has the function that reduces dope viscosity and reduce cost.

Described capacitive insulation scribbles the prescription that can solidify the special coating that can't run off and is equally applicable to the interior capacitor type insulating interlayer of all-dry capacity type high voltage current transformer bushing layer by layer.Described special coating the turn-to-turn insulation of prescription when being equally applicable to the two circle of all-dry capacity type high voltage current transformer conductor.

End device has stiffener on described Primary Conductor copper pipe or the aluminum pipe.Described Primary Conductor can be with copper pipe or aluminum pipe manufacturing.The copper pipe of described Primary Conductor or aluminum pipe can be made of single tube or pipe set of tubes.But during one situation of back, two pipes should be surrounded by reliable turn-to-turn insulation.

Compared with prior art, the invention has the advantages that: 1. the mechanical strength of capacitor core is good, and product cost is lower; 2. the coating of the special curing of Shi Yonging has improved the stability of electric property, so be a kind of capacitive current transformer of dry type.

Description of drawings

Structural representation when Fig. 1 is a conductor single turn of the present invention;

Fig. 2 is the A-A cutaway view of Fig. 1;

Structural representation when Fig. 3 is the two circle of conductor of the present invention;

Fig. 4 is the B-B cutaway view of Fig. 3;

Embodiment

Embodiment describes in further detail the present invention below in conjunction with accompanying drawing.

First execution mode when Fig. 1, Fig. 2 show conductor single turn of the present invention.

Second execution mode when Fig. 3, Fig. 4 show the two circle of conductor of the present invention.

First execution mode and second execution mode all comprise the casing 4 that is arranged on the bottom, casing 4 positioned inside have secondary coil 5 and outside secondary connection box 3, secondary connection box 3 connects the Primary Conductor 9 of one " U " font, the copper pipe of Primary Conductor 9 or aluminum pipe endoporus insert one and strengthen the common steel tube 7 that rigidity is used, the outside of Primary Conductor 9 is surrounded by capacitive insulation layer 6, and the outside of capacitive insulation layer 6 is a silicon rubber full skirt 8; Binding post 2 is housed on the Primary Conductor 9 and stiffener 1 is housed, strengthen the mechanical strength of a capacitor core.

The special coating that scribbles above-mentioned prescription of capacitive insulation layer 6.

Primary Conductor 9 of the present invention can be with copper pipe or aluminum pipe, and copper pipe or aluminum pipe can be made of single tube or pipe set of tubes.

The present invention has cancelled the stainless steel tube that is enclosed within Primary Conductor outside in the existing product, and makes into to insert common steel tube in the copper pipe of Primary Conductor or aluminum pipe, like this, has both reduced product cost, has increased the mechanical strength of a capacitor core again.

Claims

1. all-dry capacity type high voltage current transformer, it comprises the casing that is arranged on the bottom, box house is mounted with secondary coil, the secondary connection box is equipped with in the casing outside, the secondary connection box connects the Primary Conductor of one " U " font, the external diameter of " U " font Primary Conductor is provided with the capacitive insulation layer, the outside of capacitive insulation layer is set with or directly is cast with the full skirt of silicon rubber, end device has binding post on the Primary Conductor, it is characterized in that: the inside of described Primary Conductor (9) is inserted one and is strengthened the common steel tube (7) that rigidity is used, and described capacitive insulation layer (6) interlayer scribbles and can solidify the coating that can't run off.

2. all-dry capacity type high voltage current transformer as claimed in claim 1 is characterized in that: the prescription of described capacitive insulation layer (6) coating that interlayer was coated with is

80～120 parts of M component organic silicon gel weight;

80～120 parts of N component organic silicon gel weight;

0～200 part of methyl-silicone oil 500cs weight.

3. all-dry capacity type high voltage current transformer as claimed in claim 1 is characterized in that: described Primary Conductor (9) is made by copper pipe or aluminum pipe, and described Primary Conductor (9) goes up end device stiffener (1).