CN203242488U - Buscouple type current transformer and combined-cabinet structure with same - Google Patents

Abstract

The utility model discloses a bus-connected current transformer and a cabinet combining structure using the transformer. Plug-in electrical connectors are arranged between two ends of the bus-connected current transformer and corresponding switch cabinets, and the A high-voltage insulator with a truncated conical structure is arranged outside the electrical connector of the bus-coupled current transformer, and an inner cone matching the high-voltage insulator with the truncated conical structure is fixed outside the electrical connector of the adjacent switch cabinet. Insulators are not only very convenient for disassembly and assembly, but also facilitate the connection, combination and maintenance of switch cabinets, and they improve the sealing performance of switch cabinets. The fully insulated and fully sealed electrical connection between switch cabinets can be realized through this bus-connected current transformer. Connection can realize current measurement, and effectively improve the waterproof and moisture-proof performance of the current transformer, thereby enhancing the insulation performance and measurement accuracy of the current transformer, and prolonging the service life of the bus-connected current transformer.

Description

Bus-connected current transformer and the cabinet structure using the transformer

technical field

The utility model belongs to the technical field of high-voltage power distribution, and specifically relates to a bus-coupled current transformer and a combined cabinet structure using the current transformer to realize the electrical connection of adjacent high-voltage switch cabinets.

Background technique

Chinese Utility Model Patent Publication Document CN201035064Y discloses a bus-coupled fully-sealed current transformer. This current transformer uses epoxy resin vacuum casting to cast the iron core, primary winding, and secondary winding into a fully enclosed columnar structure. The incoming wire end and outgoing wire end of the primary winding are respectively arranged at the two ends of the columnar body, and shed structures for strengthening the creepage distance are arranged outside the incoming wire end and outgoing wire end of the primary winding. At present, the power supply system is becoming more and more complex, and the gas fully insulated switchgear and/or solid fully insulated switchgear often need to use this kind of bus-connected current transformer to realize electrical connection and current measurement. However, when this kind of bus-connected fully sealed current transformer is used to connect two switch cabinets, it is necessary to punch holes in the two switch cabinets and connect the primary incoming line end and primary outgoing line end of the current transformer in the two switch cabinets, so it is not only It is troublesome to disassemble and assemble, and it is easy to damage the sealing performance of the switch cabinet, and because the terminals set on the primary incoming line end and the primary outgoing line end at both ends of the existing bus-connected current transformer are exposed in the air, resulting in this current When the transformer is actually used, its waterproof and moisture-proof effect is poor, which reduces the insulation performance of the current transformer and affects the measurement accuracy of the current transformer.

Utility model content

The purpose of this utility model is to provide a cabinet-merging structure to solve the problem that the existing bus-connected current transformer is inconvenient to disassemble and easily damage the sealing performance of the switch cabinets when connecting two adjacent switch cabinets.

The technical scheme of the cabinet combining structure of the utility model is: a cabinet combining structure, including more than two switch cabinets and a bus-connected current transformer for realizing the electrical connection of adjacent switch cabinets, and the described bus-connected current transformer includes The main body of the transformer is provided with electrical connectors for electrical connection between the two ends of the main body of the transformer and the corresponding switch cabinets, and high-voltage insulators are respectively provided outside the electrical connectors, and the two ends of the main body of the transformer are described. The electrical connectors on the upper part and the corresponding switch cabinet are plug-in and plug-in electrical connectors. The high-voltage insulators at both ends of the main body of the transformer are truncated cone structures whose diameter gradually increases from the corresponding end to the middle of the main body of the transformer. The high-voltage insulators on the two adjacent switch cabinets are inner cone insulators matched with the corresponding truncated cone sealing sockets.

The plug-in electrical connector includes a conductive rod and an elastic contact finger. The conductive rod is fixed at the center of the small-diameter end of the inner cone insulator. inside the blind hole.

The inner cone insulator includes a cone sleeve part, and the cone sleeve part of the inner cone insulator penetrates into the opening opened on the wall of the corresponding switch cabinet, and radially protrudes from the outer peripheral surface of the large diameter end of the inner cone insulator. A retaining edge that cooperates with the outer wall surface of the corresponding switch cabinet body wall. the

At the same time, the utility model also provides a bus-connected current transformer for realizing the electrical connection between adjacent switch cabinets. The technical solution of the bus-connected current transformer is: a bus-connected current transformer, comprising The main body of the transformer, the two ends of the main body of the transformer are respectively provided with the electrical connectors of the transformer for electrical connection with the corresponding switch cabinet, and the electrical connectors of the transformer are respectively provided with high-voltage insulators, and the transformers at both ends of the main body of the transformer The electrical connector is a plug-in electrical connector for electrical connection with the corresponding switch cabinet, and the high-voltage insulator is a truncated cone structure whose diameter gradually increases from the corresponding end to the middle of the transformer body.

Blind holes are respectively dug in the center of the end faces at both ends of the main body of the transformer, and the plug-in electrical connectors are elastic contacts fixed in the corresponding blind holes by bolts. the

The cabinet combination structure adopted by the utility model is to set plug-in electrical connectors between the two ends of the bus-connected current transformer and the corresponding switch cabinet, and set a truncated cone outside the electrical connector of the bus-connected current transformer. The high-voltage insulator with a high-voltage structure is fixed outside the electrical connector of the adjacent switch cabinet with an inner cone insulator that matches the high-voltage insulator of the truncated conical structure with a sealed sleeve. Maintenance, and it improves the sealing performance of the switchgear. Through the bus-connected current transformer, the fully insulated and fully sealed electrical connection between the switchgears can be realized, and the current measurement can be realized. At the same time, the current transformer can be effectively improved. Excellent waterproof and moisture-proof performance, thereby enhancing the insulation performance and measurement accuracy of the current transformer, and prolonging the service life of the bus-connected current transformer.

Description of drawings

Fig. 1 is the structural representation of the specific embodiment of the utility model bus-connected current transformer;

Fig. 2 is a structural schematic diagram of a specific embodiment of the utility model combined cabinet structure.

Detailed ways

The specific embodiment of the bus-connected current transformer of the present invention is shown in Figure 1. The bus-connected current transformer includes a transformer body 1 that is integrally cast and formed in a cylindrical structure as a whole. There are secondary terminals 4, and the two ends of the main body of the transformer 1 are respectively the incoming wire end 2 and the outgoing wire end 3 of the primary winding. It consists of connected electrical connectors and high-voltage insulators located outside the electrical connectors. In this embodiment, the primary winding inlet terminal 2 and outlet terminal 3 are electrically connected to adjacent switch cabinets through plug-in electrical connectors, wherein the electrical connectors provided at both ends of the transformer main body 1 are via bolts 22 The elastic contact fingers 21 fixedly installed, and the high-voltage insulators cast outside the elastic contact fingers 21 at both ends of the transformer main body 1 are truncated cone structures whose diameter gradually increases from the corresponding end to the middle of the transformer main body 1 .

When the above-mentioned bus-coupled current transformer is used to realize the electrical connection between the gas fully insulated switchgear and/or the solid fully insulated switchgear, as shown in Fig. The inner cone insulators 7 and 8 are respectively fixedly installed on the body wall to match the high-voltage insulators with a frusto-conical structure at both ends of the bus-connection current transformer. The two inner cone insulators 7 and 8 respectively include large ends facing The taper sleeve part fixed on the wall of the corresponding gauge body is fixed on the center of the small-diameter end of the taper sleeve part of the two inner cone insulators 7 and 8 respectively. The elastic contact fingers 21 of 3 are plugged into the matching conductive rods, and the conductive rods cooperate with the corresponding elastic contact fingers 21 to form a plug-in electrical connector to realize the electrical connection between the bus-coupled current transformer and the corresponding inner cone insulator. On the outer peripheral surfaces of the large-diameter ends of the two inner cone insulators 7 and 8, there are protrudingly provided with a retaining edge cooperating with the axial stop of the outer wall of the corresponding switch cabinet body wall. When connecting, insert the inlet terminal 2 and outlet terminal 3 of the primary winding at both ends of the bus-connected current transformer into the inner cone insulators 7 and 8 fixed on the cabinet walls of the two adjacent switch cabinets 5 and 6 respectively. The conductive rods in the insulators 7 and 8 are inserted into the elastic contact fingers 21 provided at the corresponding ends of the bus-connected current transformer. Thereby, the electrical connection between two adjacent switch cabinets 7, 8 can be realized, and the current measurement between two adjacent switch cabinets 5, 6 can be realized at the same time.

In the utility model, the inner cone insulators fixedly installed on the adjacent two switch cabinets can adopt the existing inner cone insulators for busbars, so that the bus-coupled current transformer has both the function of inner cone busbar connector and the function of current transformer. It is not only convenient for on-site installation and connection, but also because the inner cone surface of the inner cone insulator fixed on the switch cabinet and the outer cone surface of the truncated conical high-voltage insulator at the end of the bus-connected current transformer are matched and sealed, so there is no need to install The shed structure can be set outside the inlet and outlet ends of the primary winding of the bus-connected current transformer to realize the fully insulated and fully sealed electrical connection between adjacent switch cabinets, so that it can ensure the electrical connection between adjacent switch cabinets. On the premise of safety and reliability, the shape structure of the bus-connected current transformer is simplified, and the production cost of the bus-connected current transformer is reduced. At the same time, the primary winding at both ends of the bus-connected current transformer The combination of frusto-conical high-voltage insulators and inner cone insulators can also effectively improve the waterproof and moisture-proof performance of the bus-connected current transformer, enhance the insulation performance and measurement accuracy of the current transformer, and extend the length of the bus-connected current transformer. service life of the device.

The utility model is not limited to the above-mentioned embodiments. In specific applications, the high-voltage insulators poured outside the inlet and outlet ends of the primary winding at both ends of the bus-coupled current transformer can be triangular pyramids or quadrangular pyramids in addition to conical shapes. A tapered structure with a large end and a small end; the conductive rod in the plug-in electrical connector between the inner cone insulator and the bus-connected current transformer can also be fixed on the incoming wire of the primary winding of the bus-connected current transformer The center of the blind hole corresponding to the terminal and the outlet end, and the elastic contact finger correspondingly plugged with the conductive rod is fixed at the center of the small diameter end of the corresponding inner cone insulator taper sleeve part, and all the above equivalent deformations are within the scope of protection of the present invention. within.

Claims (5)

1. one kind and cabinet, the mother formula current transformer that comprises the electrical connection of plural switch cubicle and realization adjacent switch cabinet, described mother formula current transformer comprises current transformer body, between the two ends of current transformer body and respective switch cabinet, be respectively equipped with the electrical connector for electrical connection, outside electrical connector, be respectively equipped with high voltage insulator, it is characterized in that, the described plug-in electric connector of electrical connector for pegging graft and cooperating of being located on end, current transformer body two ends and the corresponding switch cubicle, the high voltage insulator at described current transformer body two ends is the frusto-conical configuration that diameter is increased to the current transformer body middle part gradually by corresponding end, and the high voltage insulator on described adjacent two switch cubicles is to coincide with corresponding truncated cone to seal the inner cone insulator that sleeve cooperates.

2. described and cabinet according to claim 1, it is characterized in that, described plug-in electric connector comprises conducting rod and elasticity fingertip, described conducting rod is fixed in inner cone insulator miner diameter end center, and described elasticity fingertip is bolted in the blind hole that the end face center that is installed on the current transformer body two ends digs.

3. according to claim 2 and cabinet, it is characterized in that, described inner cone insulator comprises the tapered sleeve part, the tapered sleeve of described inner cone insulator partly penetrates in the opening of offering on the corresponding switch cabinet body wall, and radial convex is provided with the gear edge that cooperates with corresponding switch cabinet body wall outside wall surface block on the bigger diameter end outer peripheral face of inner cone insulator.

4. mother formula current transformer, comprise current transformer body, be respectively equipped with at the two ends of current transformer body for the instrument transformer electrical connector that is electrically connected with corresponding switch cubicle, outside the instrument transformer electrical connector, be respectively equipped with high voltage insulator, it is characterized in that, the plug-in electrical connector of the instrument transformer electrical connector at described current transformer body two ends for being used for being electrically connected with the respective switch cabinet, described high voltage insulator are the frusto-conical configuration that diameter is increased to the current transformer body middle part gradually by corresponding end.

5. mother formula current transformer according to claim 4 is characterized in that, has dug respectively blind hole at the end face center at described current transformer body two ends, and described plug-in electrical connector is the elasticity fingertip that is bolted in corresponding blind hole.

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