CN105785080B - The secondary circuit tooling of GIS current transformer high-pottings - Google Patents

Abstract

The invention discloses a secondary circuit tooling for the high-voltage test of a GIS current transformer, which comprises a wiring board, an equipotential plate and a plurality of contact assemblies. The plurality of contact assemblies are fixedly arranged on the bottom surface of the equipotential plate according to a certain interval; the contact assemblies include a guide cone, a compression spring, an inner positioning cylinder, and a grounding wire, and the upper end of the inner positioning cylinder is vertically fixed on the bottom surface of the equipotential plate. The bottom surface of the potential plate, the lower end of the inner positioning cylinder is movably set in the guide cone, the lower end of the guide cone is against the terminal of the wiring board, and the pressure spring is sleeved in the inner positioning cylinder. The grounding wire is electrically connected to the guide cone between the equipotential plate. Since the inner positioning cylinder of the contact assembly of the present invention plays the role of positioning and guiding, the outer cone cylinder is in close contact with the terminal through the pressure of the compression spring, so that all the terminals on the secondary side of the current transformer are short-circuited and grounded, avoiding the secondary The open circuit of the side terminal leads to the phenomenon of high-voltage discharge of the components. Therefore, the present invention has the advantages of simple assembly, economical and practical, high reliability and high work efficiency.

Description

Secondary circuit tooling for high voltage test of GIS current transformer

technical field

The invention relates to a high-voltage test equipment, in particular to a secondary circuit tooling for the high-voltage test of a GIS current transformer.

Background technique

At present, when GIS equipment manufacturers conduct factory high-voltage tests, the short connection of the secondary terminal of the current transformer is generally fixed by bolts after winding the wires. In this traditional connection method, the bolts and wires must be removed one by one after the test. Since there are as many as dozens of binding posts, it takes a lot of man-hours and it is easy to cause false connection of the terminals, which may cause serious consequences caused by the open circuit of the secondary circuit of the current transformer caused by the virtual connection of the terminals. In order to improve the efficiency and test reliability, the inventors researched and designed the structure of the current transformer and the characteristics of the wiring board, and obtained the solution.

Contents of the invention

The object of the present invention is to provide a secondary circuit tooling for the high-voltage test of a GIS current transformer that is simple to assemble, economical and practical, and highly reliable.

For realizing the above object, technical solution of the present invention is:

The present invention is a secondary circuit tooling for the high-voltage test of a GIS current transformer, which includes a wiring board, an equipotential plate, and a plurality of contact assemblies; the outer edge of the wiring board is installed on the upper pressure ring and the GIS current transformer. The bottom flanges are fixed by the fixing bolts of the upper pressure ring. There is a sealing ring between the terminal board and the bottom flange of the GIS current transformer to isolate the internal SF6 gas. The outer edge of the equipotential plate is fixed on the top of the GIS current transformer. The top surface of the pressure ring; the plurality of contact assemblies are fixedly arranged on the bottom surface of the equipotential plate according to a certain interval; the contact assembly includes a guide cone, a compression spring, an inner positioning cylinder, a grounding wire, and an inner positioning cylinder The upper end of the upper end is vertically fixed on the bottom surface of the equipotential plate, the lower end of the inner positioning cylinder is movably sleeved in the guide cone, the lower end of the guide cone is against the terminal of the wiring board, the pressure spring is sleeved in the inner positioning cylinder and presses The two ends of the spring lean against the equipotential plate and the inner bottom surface of the guide cone respectively, and the ground wire is electrically connected between the guide cone and the equipotential plate.

The guide cone has a cavity with one end open, which is used to accommodate the pressure spring and the inner positioning cylinder, and the bottom surface of the guide cone is conical.

After the above scheme is adopted, since the present invention is mainly composed of several parts such as a wiring board, an equipotential plate, and a plurality of contact assemblies, the contact assembly includes a guide cone, a pressure spring, an inner positioning cylinder, and a grounding wire. Positioning and guiding function, the outer cone is in close contact with the secondary terminal of the current transformer through the pressure of the compression spring, the outer cone is connected to the wire of the equipotential plate, and the equipotential plate is grounded through the grounding cable, thus realizing the secondary terminal of the current transformer All terminals on the secondary side are short-circuited to ground, which avoids the high-voltage discharge phenomenon caused by the open circuit of the terminals on the secondary side during the high-voltage test of the GIS current transformer. Therefore, the present invention has the advantages of simple assembly, economical and practical, high reliability and high work efficiency. The advantages.

The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

Description of drawings

Fig. 1 is a sectional view of the present invention;

Fig. 2 is a partial enlarged view of Fig. 1 at place A;

Fig. 3 is the front view of wiring board of the present invention;

Fig. 4 is a sectional view along line A-A of Fig. 3;

Fig. 5 is a use state diagram of the present invention.

Detailed ways

As shown in FIG. 1 and FIG. 5 , the present invention is a secondary circuit tooling for high-voltage testing of GIS current transformers, including an equipotential plate 1 , a plurality of contact assemblies 2 , and a wiring board 3 .

Referring to Fig. 3 and Fig. 4, the terminal block 3 has a plurality of terminal posts 31 surrounding the center of the circle, and the outer edge of the terminal block 3 is installed between the upper pressure ring 4 and the bottom flange 5 of the GIS current transformer. It is fixed by the fixing bolt 6 of the upper pressure ring, and a sealing ring 7 is provided between the terminal board 3 and the bottom flange 5 of the GIS current transformer to isolate the internal SF6 gas, and the outer edge of the equipotential plate 1 is installed on the top of the GIS current transformer The top surface of the pressure ring 4 is fixed by the fixing bolt 8 of the frock. The plurality of contact assemblies 2 are fixedly arranged and installed on the bottom surface of the equipotential plate 1 according to a certain interval.

As shown in FIG. 2 , the contact assembly 2 includes a guide cone 21 , a compression spring 22 , an inner positioning cylinder 23 , and a ground wire 24 . The guide cone 21 has a cavity 211 with one end open, which is used to accommodate the compression spring 22 and the inner positioning cylinder 23, and the bottom surface 212 of the guide cone 21 is conical. The upper end of the inner positioning cylinder 23 is vertically fixed on the bottom surface of the equipotential plate 1, and the lower end of the inner positioning cylinder 23 is movably nested in the guide cone 21, and the lower end of the guide cone 21 abuts against the terminal of the terminal block 3 31, the compression spring 22 is nested in the inner positioning cylinder 21 and the two ends of the compression spring 22 are respectively against the inner bottom surface of the equipotential plate 1 and the guide cone 21, and the ground wire 24 is electrically connected between the guide cone 21 and the equipotential plate. between 1.

Working principle of the present invention:

As shown in Figure 1 and Figure 2, the equipotential plate 1 equipped with a plurality of contact assemblies 2 is fixed on the top surface of the wiring board 3 through tooling fixing bolts 8, and the outer cone on the contact assembly 2 is connected to the wiring board 3 The positions of the terminal posts 31 correspond one-to-one. After the guide cone 21 contacts the terminal post 31, it will squeeze the compression spring 22. The reaction force of the compression spring 22 makes the guide cone tube 21 and the metal terminal post 31 form a pressure fit, ensuring Effective electrical connection between the terminal post 31 and the guide cone 21 is ensured. The junction board 3 is electrically connected to the GIS current transformer 10 through the connecting wire 9 (as shown in Figure 5), and the equipotential board 1 plays the role of short-circuiting all the terminal posts 31; the grounding block of the equipotential board 1 fixes the grounding cable and The connection of the grounding grid ensures the effective grounding of the equipotential plate 1 and finally realizes the reliable grounding of all the binding posts 31 .

The key point of the present invention is just: adopt contact assembly.

The above is only a preferred embodiment of the present invention, and there are many structural forms of the contact assembly, so the scope of the present invention cannot be limited by this, that is, the equivalents made according to the patent scope of the present invention and the contents of the specification Changes and modifications should still fall within the scope covered by the patent of the present invention.

Claims (2)

1. A secondary circuit frock for GIS current transformer high-voltage test, characterized in that: it comprises a wiring board, an equipotential plate, and a plurality of contact assemblies; the outer edge of the wiring board is installed on the top of the GIS current transformer The pressure ring and the bottom flange are fixed by the fixing bolts of the upper pressure ring. There is a sealing ring between the terminal plate and the bottom flange of the GIS current transformer to isolate the internal gas; the outer edge of the equipotential plate is fixed on the GIS current transformer. The top surface of the upper pressure ring; the plurality of contact assemblies are fixedly arranged at intervals on the bottom surface of the equipotential plate; the contact assembly includes a guide cone, a compression spring, an inner positioning cylinder, a grounding wire, and an inner positioning cylinder The upper end of the upper end is vertically fixed on the bottom surface of the equipotential plate, the lower end of the inner positioning cylinder is movably sleeved in the guide cone, the lower end of the guide cone is against the terminal of the wiring board, the pressure spring is sleeved in the inner positioning cylinder and presses The two ends of the spring lean against the equipotential plate and the inner bottom surface of the guide cone respectively, and the ground wire is electrically connected between the guide cone and the equipotential plate. 2. The secondary circuit tooling of GIS current transformer high-voltage test according to claim 1, characterized in that: the guide cone has a cavity with one end open, and the cavity is used to accommodate the compression spring and the inner The positioning cylinder and the bottom surface of the guiding cone are conical.