KR100857253B1 - Seperation type of phase connection device for underground switch and circuit breakers - Google Patents

Abstract

A separation type phase connection device for a solid insulated switch and a circuit breaker is provided to reduce a manufacturing cost by not requesting several moldings. A separation type phase connection device for a solid insulated switch and a circuit breaker includes a bar type conductor(111), a bus bar unit(130), a plurality of contacting units(120), an insulated plug(140). The bar type conductor is coupled to a hole which is installed on a lower part of a conductor which is molded on an insulated housing. The bus bar unit has a plurality of connection units of a ring shape, an expansion unit and a coupling unit. The connection units are inserted into the bar type conductor. The expansion unit is expanded from the connection units. The coupling unit connects an end of the connection units. The contacting units insert the bar type conductor. The contacting units have an upper opening unit, a side opening unit, and a lower opening unit. The upper opening unit is coupled to the insulated housing. The side opening unit is coupled to the expansion unit of the bus bar unit. The lower opening unit is coupled to the insulated plug. The insulated plug has an upper groove which receives a lower part of the bar type conductor, and an insert unit which is coupled to a lower part of the bar type conductor. The contacting units are arranged and coupled to the bus bar unit.

Description

Separation Type of Phase Connection Device for Underground Switch and Circuit Breakers}

The present invention relates to a separable phase connection connector for underground solid insulation switchgear and breaker.

More specifically, it relates to a solid-insulated four- or three-circuit phase-connected busbar contact device used for switchgear and circuit breaker in underground distribution lines, each circuit consisting of four or three of epoxy mold-insulated multi-circuit switch and breaker for underground. The present invention relates to a connection device having a structure in which each phase connection can be connected without interference by only one single type for phase connection.

The present invention relates to a connection device for a solid-insulated multi-circuit switch and a circuit breaker, and more particularly, to an invention capable of providing a bus bar connection device of an epoxy molded insulated underground wiring line and a circuit breaker in a single form. .

In general, electricity with a voltage of about 20,000V from the power plant is boosted to ultra high voltage to be suitable for power transmission and is transmitted to the primary substation. Then, the electricity transmitted to the primary substation is stepped down to about 22.9 kV and supplied to the secondary substation or each customer. The electricity supplied from the secondary substation is supplied to the power receiving facilities of each customer through a distribution system consisting of overhead distribution distribution lines and underground distribution distribution lines, and electricity is supplied through special high voltage consumers, high pressure consumers, and various outdoor transformers. Up to the low pressure consumer supplied. Due to the increase in population and buildings, urban distribution lines are gradually becoming underground, and as the number of users for electricity use and the complexity of electricity usage become complicated, multi-circuit switches and breakers for underground wiring lines are installed and used in individual places.

Multi-circuit switchgear and breaker are installed and used on the ground in order to distinguish the line and branch of underground wiring lines and to cut off the power of underground line. The multi-circuit switchgear and breaker is composed of several breakers connected by busbars. do.

Switchgear and breaker is an electric device that can cut off the flow of current and must cut off the current when the load is applied. When energizing, separating the movable contactor and the fixed contactor, an arc occurs between them. These arcs cause thermal decomposition of the organic material around the contacts and the switchgear and breaker internal components, resulting in a sharp increase in pressure inside the switchgear and the breaker. Thus, an insulation device is used to prevent the risk of an accident due to arcing. As an insulating method, there is a method of sealing with oil or gas or dispersing it in air, but gas insulated switchgear and circuit breaker are usually used.

Here, the gas-insulated multi-circuit switch and the breaker which are conventionally used will be introduced.

The pad switch used in a conventional gas insulated multi-circuit switch and a circuit breaker has an SF6 gas insulation method, and a single switch is built in a single tank, and the insulation and opening / closing ability are influenced by SF6 gas pressure. For this reason, it is necessary to monitor gas leakage at all times, and in the case of switchgear and breaker operation, there is a problem such as environmental damage caused by generation of harmful by-products generated during arc extinguishing, so appropriate measures are required.

In addition, the SF6 gas pressure inside the switchgear and the breaker to monitor and correct the maintenance of a large amount of time and cost, and if the pressure rises during the internal short circuit there is a risk of injury due to explosion.

In addition, when it is intended to be installed in a narrow space in the city, there is a problem that it is not easy to select a place to install due to the large area.

In order to solve the above problems, the invention has been devised to provide a switch and a circuit breaker for underground wiring lines insulated with epoxy molding instead of using an auxiliary insulation medium such as oil or SF6 gas insulation.

According to the above invention, the problem of the conventional need for constant monitoring of gas leakage or the generation of harmful by-products in the event of arc generation has been solved. However, according to the above invention, the bus and the connecting portion connecting the respective phases have one body. Because it is a structure made of hard work, it is difficult to make a real work, and when one of the connection parts of three or four circuits has a dimensional change, the work is very difficult and a lot of defective rate is generated.

In addition, in the case of an integral connection device for an epoxy molding insulation switch and a breaker, it is composed of two or three types, and thus, two or three types of molds required for manufacturing are required. There is still a problem of rising.

The present invention for solving the above problems has to be separated from the integrated bus system that was possible to assemble the A phase, B phase and C phase only if it has two or three forms of the prior art, A phase (A1, A2, Separate phase connection for underground solid insulated switchgear and circuit breaker, enabling the assembly of A3 and A4), B phase (B1, B2, B3 and B4), and C phase (C1, C2, C3 and C4) without interference The purpose is to provide a connection device.

The present invention for achieving the above object,

A rod-shaped conductor having an upper end coupled to a hole provided at a lower end of the conductor molded in the insulating housing; A bus bar portion including a plurality of annular coupling parts fitted to the rod-shaped conductor, an L-shaped extension part extending from the coupling part, and a connection part connecting the ends of the extension part to each other; The rod-shaped conductor includes an upper open portion coupled to the insulating housing, a side open portion coupled to the extension portion and the side of the busbar portion, and a lower surface open portion coupled to the insulation plug, but the openings communicate with each other inside. A plurality of connection parts provided; And an insulating plug having an upper groove for inserting a lower end of the rod-shaped conductor and a rod-shaped conductor inserting portion fixed to the upper groove and coupled to a lower end of the rod-shaped conductor; And a plurality of connection parts are arranged in one row, and the separable phase connection connector for underground solid insulation switchgear and breaker, characterized in that coupled to the bus bar.

In addition, the separable phase connection device for a ground solid state insulation switch and a circuit breaker includes: an insulation plug cap coupled to a lower end of the insulation plug to prevent penetration of external moisture or dust; It is possible to be configured to include more.

The top open part, the side open part and the bottom open part provided in the connection part may be configured to have a structure in which the diameter becomes narrower from the outside of the connection part toward the center part of the connection part, and between the lower end of the conductor molded in the insulating housing and the rod-shaped conductor. The coupling may be configured by thread coupling by forming a female thread on the lower end of the conductor molded in the insulating housing and a male thread on the rod-shaped conductor, and the insert portion and the rod-shaped conductor are coupled to the insert portion. It is possible to form a female thread and to form a male thread on a rod-shaped conductor by joining threads. It is also possible that the rod conductor is a stud bolt.

The rod-shaped conductor mounting insert part may be made of a material of aluminum or brass, and three or four ring-shaped coupling parts of the bus bar part may be provided. And it is also possible that the side opening portion is further provided as having a guide portion extended to the outside that can incorporate the coupling portion of the bus bar. In addition, the connection between the lower surface of the connection portion and the insulating plug cap can be configured in a fitting manner.

In accordance with the present invention, the inconvenience of the work during the dimensional change that may occur in the process of assembling the conventional solid-state insulation switchgear / integrated connection device for the breaker, the degradation of the insulation performance due to the work corresponding to the dimensional change and the integrated switchgear / The inconvenience of manufacturing the connection device for the breaker is composed of a structure that can be produced and assembled by separating the connection part and the busbar part from each other.

According to the above configuration, the production cost is reduced by eliminating the need for multiple molds in the cost plane, and the quality defect rate in production is significantly lowered since the same parts having a simple shape in terms of quality are produced. There is. In addition, assembling is simple at the time of installation, it is easy to assemble, and if there is a defect in some products does not affect the entire product, but only the replacement of the above-mentioned defective product is facilitated for installation convenience. Moreover, since interference does not generate | occur | produce mutually also in the use surface after assembly, convenience is also attained in use.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a side view and a front view of a phase connection connecting device of a ground solid insulating switch and a circuit breaker according to an embodiment of the present invention, Figure 2 is before coupling of the connection device for a phase connection according to an embodiment of the present invention, 3 is a front view and a side view of the busbar portion, and FIGS. 4 and 5 are views showing a coupling mode of the phase connection connector.

As shown in the figure, there is provided a connection portion 120 connected to the solid insulation housing 110 of the ground solid state insulation switchgear and the circuit breaker, and a bus bar portion 130 connected to the connection portion 120 is provided.

And the insulating plug 140 for insulation is inserted in the lower end of the connecting portion 120 and the insulating plug cap 150 for preventing the penetration of external moisture and dust to the connecting device is covered.

The solid insulating housing 110 is usually wrapped in an epoxy material and is insulated by the epoxy material. A conductor 111 molded in the insulating housing 110 is embedded in the lower end of the solid insulating housing 110 wrapped with the epoxy material. The conductor 111 faces downward in the drawing, and the end of the conductor 111 is provided with a groove to which a rod-shaped material which can be energized is attached.

A stud bolt 113 may be used for the rod-shaped material, and a female thread is provided in the lower groove 112 of the conductor 111 so that the stud bolt 113 may be coupled thereto.

The depth of the lower groove 112 of the insulating housing 110 is provided so that the depth of the stud bolt 113 is embedded in half or less, rather than the degree of full penetration of the stud bolt 113. This is to enable electrical connection with the coupling part 131 which is the conductor provided in the bus bar part 130.

The conductor, that is, the coupling part 131 provided in the bus bar part 130 is connected to the lower end of the stud bolt 113 exposed to the outside. The coupling part 131 provided in the bus bar 130 has a shape of an end that wraps the stud bolt 113 from the outside for an electrical connection with a lower end of the stud bolt 113, that is, a ring-shaped conductor hole ( 131a) is preferably provided.

The coupling part 131 is provided with a plurality, because the switch and the circuit breaker is usually composed of three to four because the coupling portion 131 also has to be provided with three to four phases for each circuit.

In addition, the coupling part 131 is provided with an extension part 132 bent in the letter "A". The reason why the extension part 132 should be provided in a curved shape is that it has to have a structure that enables each phase connection without interference in one single shape.

In the case of four circuits as an example, the twelve connecting portions 120 are connected to the conductors of the insulating housing 110 in order to allow the A, B, and C phases to be connected to each other from the insulating housing 110 without interference. 111, and the eight connection parts 120 are inserted such that the direction of the side opening part 122 of the connection part 120 is in one direction and the direction of the four side opening parts 122 is in the other direction. You must lose.

For example, in order for A and B phases to be provided on one side and C phases on the other side, A and B phases must be fitted in the same direction and C phases must be fitted in different directions. When the 132 is provided in a straight line, the interference occurs, but in the case of the L-shape, the interference does not occur in the connection.

That is, when one of the A, B phase is extended in the upper direction, the other is in the downward direction and the extension is each connected by the connecting portion 133 can be combined without interference on each phase.

The connection part 120 is coupled to the lower end of the stud bolt 113. The connection part 120 has a cylindrical shape in appearance, but has an upper surface opening part 121 on which a conductor 111 molded into the solid insulating housing 110 can be inserted, and a busbar part on a side surface thereof. It is provided with a side open portion 122 to which the conductors of 130 can be coupled, and a lower surface open portion 123 on which the insulating plug 140 is located is provided.

The upper surface opening portion 121, the side opening portion 122 and the lower surface opening portion 123 is preferably provided in the form of reducing the diameter from the outside toward the center of the connection portion 120.

Because the lower groove 112 of the conductor 111 coupled to the upper side of the stud bolt 113, the insulation plug insert hole 141 coupled to the lower side of the stud bolt 113 is tightened more tightly. In order to be assembled, the diameter of the central portion of the inner surface of the connecting portion 120 should be smaller than the diameter of the outside, but the change in diameter should be continuous. This is because the insulating housing 110, the connecting portion 120, the insulating plug 140 and the bus bar 130 can be more tightly coupled.

In addition, it is preferable that the side opening portion 122 further includes a guide portion 122a to which the coupling portion 131 of the busbar portion 130 can be stably coupled. In general, three or four circuits require three phases of phase A, phase B, and phase C for phase connection, and a guide portion 122a is provided on the side surface to enable the phase connection without interference. This is because it is more preferable for the electrical insulation.

For example, when the A phase and the B phase are provided on one side and the C phase on the other side, the side opening portion 122 is connected to connect the C 120 in one direction in connection with the A phase and the B phase. It is possible to connect in the other direction so as to face the opposite side.

When connecting the connection part 120 to the bottom of the stud bolt 113 should be connected to the conductor hole (131a) provided at the end of the bus bar 130, insulated housing (120) and the bus bar 130 is usually insulated ( At the same time, the coupling unit 120 and the bus bar unit 130 are first coupled, that is, the coupling unit 131 of the bus bar unit 130 is coupled to the side opening 122 of the connection unit 120 first. After coupling, it is possible to combine the solid insulating housing 110 and the connection unit 120.

The lower end of the connection portion 120 is provided with a lower opening 123 to which the insulating plug 140 can be coupled. In addition, the connection part 120 is preferably made of an insulating material to prevent the leakage of electricity to the outside.

The insulating plug 140 is coupled to the lower end of the connection part 120 to block the lower surface opening part 123 provided at the lower part of the connection part 120 to electrically insulate the connection part 120 and the bus bar part 130 from the insulating housing 110. Make sure that it is tight. To this end, the upper surface of the insulating plug 140 is provided with an upper groove for inserting the lower end of the stud bolt 113, the upper groove of the stud bolt of aluminum or brass material for coupling with the stud bolt 113 ( 113) A mounting insert hole 141 is provided. This is because the material constituting the insulating housing 110 is not easy to be combined with the stud bolt 113 because the strength is low.

The insert hole 141 is preferably provided with a female thread for coupling with the stud bolt 113.

After the insulating plug 140 is coupled, the insulating plug cap 150 is coupled at the bottom. The insulation plug cap 150 is to prevent the phase connection connecting device from the penetration of dust or moisture, the coupling is possible by the coupling method of the fitting method.

What has been described above is merely an embodiment for carrying out the present invention, and the present invention is not limited to the above-described embodiment, and as claimed in the following claims, the present invention belongs without departing from the gist of the present invention. Anyone skilled in the art will have the technical idea of the present invention to the extent that various modifications can be made.

1 is a side view and a front view of a phase connection connector of the ground solid insulation switch and circuit breaker according to an embodiment of the present invention.

Figure 2 is a view before and after coupling of the phase connection connecting device of the solid-state insulating switch and the breaker according to an embodiment of the present invention.

3 is a front view and a side view of a bus bar of a connection device for phase connection of a solid insulated switchgear and a breaker according to an embodiment of the present invention.

4 and 5 is a view showing a combination of the phase connection connecting device of the solid-state insulating switch and the breaker according to an embodiment of the present invention.

<Description of the symbols for the main parts of the drawings>

110: solid insulated housing 111: conductor

112: lower groove 113: stud bolt

120: connection part 121: top open part

122: side open part 122a: guide part

123: the lower surface opening portion 130: the mother bus

131: coupling portion 131a: conductor hole

132: extension portion 133: connection portion

140: insulation plug 141: insert hole

150: insulated plug cap

Claims (11)

A rod-shaped conductor having an upper end coupled to a hole provided at a lower end of the conductor molded in the insulating housing; A bus bar portion including a plurality of annular coupling parts fitted to the rod-shaped conductor, an L-shaped extension part extending from the coupling part, and a connection part connecting the ends of the extension part to each other; The rod-shaped conductor is provided, and includes an upper open portion coupled to the insulating housing, a side open portion coupled to the extension portion and the side of the busbar portion, and a lower open portion coupled to the insulation plug, but the openings can communicate with each other inside. A plurality of connections provided to be provided; And An insulation plug having an upper groove for inserting the lower end of the rod-shaped conductor and an insert portion for rod-shaped conductor mounting fixed to the upper groove and coupled to the lower end of the rod-shaped conductor; Including but, The plurality of connection portion is arranged in a row coupled to the ground solid state switchgear and breaker for phase separation, characterized in that coupled to the busbar. The method of claim 1, The separable phase connection device for the ground insulation switch and the ground breaker for the ground includes an insulation plug cap coupled to a lower end of the insulation plug to prevent penetration of external moisture or dust; Detachable phase connection device for underground solid insulation switch and circuit breaker, characterized in that it further comprises. The method of claim 1, The upper surface opening portion, the side opening portion and the lower surface opening portion provided in the connecting portion is a structure that the diameter narrows toward the central portion of the connection portion from the outside of the connection portion, characterized in that the solid phase insulation switch for underground and disconnecting phase connection device for breakers. The method of claim 1, The coupling between the lower end of the conductor molded in the insulating housing and the rod-shaped conductor forms a female thread at the lower end of the conductor molded in the insulating housing, and the male conductor is formed in the rod-shaped conductor by underground coupling. Detachable phase connection for solid-state insulated switchgear and breaker. The method of claim 1, The coupling between the insert portion and the rod-like conductor is formed by inserting a female thread on the insert portion and a male thread on the rod-shaped conductor by separating the solid-state insulation switch and the circuit breaker. The method of claim 1, And the rod-shaped conductor is a stud bolt. The method of claim 1, The rod-shaped conductor inserting insert portion of the underground solid insulation switchgear and breaker for the phase separation connecting device characterized in that the material of aluminum or brass. The method of claim 1, Separating phase connection device for underground solid insulated switchgear and breaker, characterized in that the ring-shaped coupling portion of the bus bar is provided with three or four. The method of claim 1, The side open portion of the underground solid insulating switchgear and breaker separate phase connection connector characterized in that it further has an externally extending guide portion that can incorporate the coupling portion of the bus bar. The method of claim 2, The connection between the bottom opening of the connection portion and the insulation plug cap is a separable phase connection connector for underground solid insulation switchgear and breaker, characterized in that by fitting method. A bus bar including a plurality of coupling parts connected to the connection part, a L-shaped extension part extending from the coupling part, and a connection part connecting the ends of the extension part to each other; And A connection portion having an upper surface open portion coupled to the insulating housing, and a side open portion coupled to the bus bar side; Including but, The plurality of connection portion is arranged in a row coupled to the ground solid state switchgear and breaker for phase separation, characterized in that coupled to the busbar.

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