KR101497068B1 - Ground and underground type epoxy mold insulated multi switch and switchgear - Google Patents

Abstract

The present invention has a structure in which only a main circuit opening / closing part is provided inside an insulating housing formed by an epoxy insulating material, and the internal sealing is completely provided so as to be able to use underground, thereby reducing the volume and manufacturing cost, And the grounding work for the safety of the line work is constructed by the elbow connecting member.
The above object of the present invention is achieved by an epoxy insulator comprising an enclosure engaging portion for engaging with an enclosure of an operation device at an upper portion thereof, an upper connecting bushing portion at a lower portion thereof, and a main circuit bushing portion at a central side portion thereof, An insulated housing of a waterproof type shielded from the outside, voltage detecting devices and a current transformer coupled to both sides of the main circuit opening and closing part, the insulated voltage detectors being connected to both sides of the main circuit opening and closing part, A voltage detecting device and an insulating film which hermetically couples the inside of the main circuit opening and closing part and which is connected to each of the voltage detecting devices and connected to the main circuit bushing part by insert molding to be connected to the elbow connecting material Characterized in that it comprises a circuit conductor, and the circuit breaker comprises a ground conductor and an underground epoxy- .

Description

{GROUND AND UNDERGROUND TYPE EPOXY MOLD INSULATED MULTI SWITCH AND SWITCHGEAR} <br> <br> <br> Patents - stay tuned to the technology GROUND AND UNDERGROUND TYPE EPOXY MOLD INSULATED MULTI SWITCH AND SWITCHGEAR

The present invention relates to an epoxy molded insulating multi-circuit load switch and a circuit breaker, and more particularly, to an epoxy molding insulated type multi-circuit load switch and a circuit breaker using the waterproof type which can be used in an underground space such as ground and manhole, Circuit load switch and a circuit breaker, both of which have a small volume due to the adoption of a grounding method using an externally connected connecting material, and which are excellent in safety of grounding and have a reduced manufacturing cost and improved economy.

Generally, an electric power of about 20,000 V from the power plant is transmitted to the primary substation, and then the substation is depressurized and supplied to the secondary substation or each customer.

The electricity supplied from the secondary substation is supplied to the reception facilities of each customer through a distribution system consisting of imaginary distribution lines and underground distribution lines, and is supplied to the reception facilities of high-pressure consumers, high-pressure consumers, and various outdoor installation transformers And is supplied to a low-voltage power supply that supplies electricity.

Due to recent population and building increases, urban distribution lines are becoming more and more underground, and multi-circuit switches and breakers for underground distribution lines are installed and used as the number of electricity users and the complexity of electricity usage are increased.

Such multi-circuit breakers and breakers for underground distribution lines are used to cut off the power of line breaks and branches and underground lines in underground distribution lines, and are installed on the ground.

In order to maximize safety rather than vacuum insulation due to the environmental pollution and explosion risk of oil or SF ₆ gas insulation, insulation type multi-circuit switchgear using epoxy molding or polymer molding, Many breakers have been introduced.

Patent Document 1 (Japanese Patent Laid-Open Publication No. 10-2006-119402) discloses an electronic device having an opening and closing portion for performing a contact operation on an epoxy-molded insulating housing, an operation shaft connected to the opening and closing portion, a spring for applying a force to the operation shaft, It is unnecessary to use a gas leak detector and an alarm which are essentially attached to conventional gas insulated switchgear and circuit breaker, and it is possible to secure safety by completely eliminating the risk of explosion such as a gas insulation method in case of an internal short circuit .

Patent Document 2 (Japanese Patent Application No. 10-860528) discloses a structure in which a main conductor, a main circuit switch connected to one end of the main conductor, a main circuit push rod connected to a movable contact portion of the main circuit switch, An injection molding section injection molded around the main circuit push rod and the connection conductor with an insulating member, the main conductor, the main circuit switch, and the connecting conductor to which the fixed contact portion and the one side end of the main circuit breaker are connected; A separate circuit for inserting the insulative filler and an improvement in productivity by shortening the curing time of the insulative filler, and an injection molding machine such as an epoxy injection molding machine A technique of increasing the insulation characteristic by means of a portion is being promoted.

In Patent Document 3 (Korean Patent No. 10-888541), only the remaining parts except for the vacuum shield are assembled to form a partial body of the opening / shutting-off part, and the outer peripheral surface of the partial body is molded with epoxy to open / And the vacuum shielding portion of the bottle row is separately provided by molding the outer circumferential surface of the vacuum shielding portion of the bottle row separately from the silicone, and the vacuum shielding portion of the bottle row, which is provided separately, To thereby prevent the overall disposal of the various devices, including the conventional vacuum interrupter, when the epoxy mold is defective at the time of integral molding, thereby minimizing the economic loss.

In Patent Document 4 (Korean Patent Registration No. 10-1137967), the main circuit vacuum switch and the ground circuit vacuum switch are coated with insulating silicone on the outer circumferential surface of the switch, the high voltage resistor is connected to the main conductor on one side, In order to insulate the periphery of the ceramic resistor to be connected, the insert connected to the electric wire, the ceramic resistor, the electric wire and the insert, injection molding is carried out with insulating silicone to prevent the generation of a partial discharge between the main and the polymer molding material. A technique of securing the electric deterioration and lifetime of the switchgear by coating the conductive silicon with the conductive silicon is being promoted.

Patent Document 1: Korean Published Patent Application No. 10-2006-119402 (Published on November 24, 2006) Patent Document 2: Korean Patent No. 10-860528 (Registered on September 22, 2008) Patent Document 3: Korean Patent No. 10-888541 (Registered on March 03, 2009) Patent Document 4: Korean Patent No. 10-1137967 (Registered on Apr. 12, 2012)

The above-described Patent Documents 1 to 4 show that the insulating housing of the insulating member (epoxy, polymer) formed for insulation between the main circuit opening / closing portion and the grounding circuit opening / closing portion of the parallel arrangement is bulky, and the volume of the main circuit opening / Leading to an increase in molding complexity and manufacturing cost for insulation.

Particularly, when an epoxy (polymer) molding as a molding member is defective, there is a disadvantage in that an economical loss due to the total disposal of the main circuit opening and closing part including the insulating housing and the grounding circuit opening and closing part is significant.

In addition, since the insulating property due to the internal sealing (waterproofing) of the main circuit opening / closing part and the grounding circuit opening / closing part is not ensured, it is limited to ground use and recently it can not be used as an underground product for urban beauty.

In addition, since the insulated housing is grounded using a ground circuit opening / closing part electrically connected to the main circuit opening / closing part in the inside of the insulating housing, the volume of the insulating housing becomes large. In case of an internal fault during use, There is a disadvantage that a safety accident due to line work occurs because stability is not ensured.

In addition, since the voltage sensing unit for confirming whether a live wire is present in the insulated housing and the current sensing unit for current measurement can not be provided at the same time, the reliability of the device can not be guaranteed.

In the present invention, a current detecting sensor (current transformer: CT) and voltage detecting devices are built in an insulating housing to form an epoxy insulating material, and then an internal sealing is provided by an insulating film including a main circuit opening / closing part, And a conductive paint is applied to the outside of the housing to enable safe operation even when immersed in water.

In addition, the present invention enables grounding work by an elbow connecting member without forming a ground circuit opening / closing part inside the insulating housing for reliability enhancement such as explosion prevention and safe grounding work.

In the present invention, the voltage and current opening and closing operations are performed in the main circuit opening and closing section, the current sensing is performed in the current transformer (CT), and the voltage detecting device is applied for the presence or absence of the voltage and accurate voltage sensing.

According to an aspect of the present invention, there is provided a ground-and-underground epoxy-

A waterproof type insulated housing in which a single main circuit opening / closing part is formed in the state where the enclosure coupling part is formed at the upper part by the epoxy insulating material, the upper connecting bushing part is formed at the upper part and the main circuit bushing part is formed at the central side part;

A voltage detecting device and a current transformer inserted and coupled to both sides of the main circuit opening / closing part;

An insulation film assembled at an end portion of the upper enclosure coupling portion of the insulation housing to seal and connect the inside of the current transformer, the high voltage detection device, and the main circuit opening / closing portion; And

A main circuit conductor connected to the voltage detecting device and connected to the main circuit opening / closing part, coupled to the main circuit bushing by insert molding, and connected to the elbow connecting material;

And a control unit.

In the present invention, the outer surface of the insulating housing may be coated with a conductive paint, such as a paint film, or the like, except for the interface between the upper bushing portion and the main circuit bushing portion, ) Is preferably formed.

In the present invention, it is preferable that a voltage screen is applied to the main circuit switch to reduce the electric field strength of the main circuit conductor.

Further, in the present invention, the insulating rod is connected to the movable contact terminal of the vacuum interrupter constituting the main circuit opening / closing part, and the opening / closing operation is performed under the control of the movable contact terminal, It is preferable that the end portion is exposed to the outside in a state where the voltage detecting device, the current transformer and the actuator are completely watertight.

According to the present invention, since the main circuit opening / closing part assembled in the insulating housing formed by the epoxy insulating material and the sensing part capable of sensing and measuring the voltage and the current are constituted, the efficiency of use can be maximized, So that it is possible to use both ground and ground in the range of possible use for ground as well as for underground facilities.

In addition, it is possible to apply a method of grounding using a separate elbow connection material without installing the ground circuit opening / closing part inside the insulating housing, so that the grounding safety is excellent and the total volume of the load switchgear and the circuit breaker is minimized There is an economical design effect.

In addition, according to the present invention, it is possible to expect a mass production effect industrially with a simple molding structure, and it becomes possible to provide at low cost.

1 and 2 are a perspective view and a front view showing the appearance of the present invention.
3 is a plan view and a longitudinal sectional view showing the structure of the present invention.
4 is an enlarged view of the insulating film portion of Fig.
5 is a front view and a side view of a state in which the present invention is assembled with an operation unit enclosure.
FIG. 6 is a perspective view of a state in which an upper connecting connector according to an embodiment of the present invention is assembled. FIG.
7 is a side view of the upper connecting member and the elbow connecting member assembled according to the use of the present invention.

The present invention has a structure in which only a main circuit opening / closing part is provided inside an insulating housing formed by an epoxy insulating material, and the internal sealing is completely provided so as to be able to use underground, thereby reducing the volume and manufacturing cost, And the grounding work for the safety of the line work is constructed by the elbow connecting member.

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

The elements shown in the drawings for the purpose of explanation of the present invention may be simplified, omitted or exaggerated, without affecting the rights of the present invention.

FIG. 1 is a perspective view showing the appearance of the present invention, FIG. 2 is a front view of the present invention, and FIG. 3 is a plan and a sectional view of the present invention.

Referring to these figures, the insulated housing 100 is molded on the outside in a state of being surrounded for insulation of the main circuit opening / closing part 200 in the present invention.

The insulating housing 100 includes an upper enclosure engaging portion 110 assembled to an enclosure A of an operation device and an upper connecting bushing portion 120 of a lower phase connection connecting the elbow connecting member 500 to a center The main circuit bushing portion 130 is molded.

Each of the voltage detecting devices 310 and 321 coupled to both sides of the main circuit switch 200 is connected to the insulating housing 100 and a current transformer 320 connected to the voltage detecting device 321 ).

The main circuit switching unit 200 includes a vacuum interrupter 210 coupled to the insulating housing 100 and a movable contact terminal connected to the movable contact of the vacuum interrupter 210 An upper connecting conductor 250 connected to the fixed contact terminal 230 of the vacuum interrupter 210 and exposed to an end of the upper connecting bushing 120, And a main circuit conductor 260 connected to the vacuum interrupter 210 and exposed to an end of the main circuit bushing 130.

A portion of the insulating housing 240 where the insulating rod 240 is mounted is formed as a space R inside the enclosure coupling portion 110 of the insulating housing 210. The insulating rod 240 contacts the movable contact 210 of the vacuum interrupter 210, An assembly nut (N / T) is fastened to the terminal (220) by means of a fastening member such as a stud bolt (B / T)

It is preferable that the insulating rod 240 is formed of a BMC or an epoxy rod containing glass fiber having good mechanical tensile strength and insulation characteristics and is formed as a bell pipe outside in order to increase the surface leakage distance as is already known to those skilled in the art .

Such a technique is well known in the art for the manufacture of load switches and breakers, and the detailed description thereof will be fully understood.

In the present invention, the outer surface of the insulative housing 100 may be electrically connected to the main circuit bushing 130 except for the interface between the upper bushing 120 and the main circuit bushing 130, It is preferable to form a paint film 300 by a paint.

4, the outer circumferential surface of the insulating rod 240, which is connected to the outer casing A of the manipulator and moves up and down, is sealed in the outer casing 110 formed integrally with the upper end of the insulating housing 100 And an insulating film 350 which is in close contact with the casing A of the manipulator and which provides sealing of exposed portions of the respective connecting conductors of the voltage detecting devices 310 and 321 and the transformer 320 of one side is assembled.

The insulating layer 350 includes a contact protrusion 351 which is in close contact with the recessed portion 101 formed at the upper end of the insulating housing 100 and a contact protrusion 351 which is accommodated in the space portion R and is formed on the outer circumferential surface of the insulating rod 240 (352) extending in a U-shaped groove so as to extend and retract at a variable distance of an elevating operation by the manipulating device and a pair of elastic protrusions (351) And a setting hole 353 passing through concentric circles corresponding to the respective setting nuts 102 connected to the concentric circles and penetrating corresponding to the respective connecting conductor ends of the voltage detecting devices 310 and 321 and the transformer 320 of one side, ).

At this time, the extensible plate 352 of the insulating layer 350 is formed with an O-ring 352a at the inner circumferential end thereof, and the O-ring is elastically contacted to the O-ring groove 241 formed in the outer circumferential surface of the insulating rod 240 Lt; / RTI &gt;

Accordingly, the insulation rod 240 connected to the actuator can move up and down in response to a rising distance separating the movable contact terminal 220 of the vacuum interrupter 210 from the fixed contact terminal 230, The O-ring 352a is elastically brought into close contact with the O-ring groove 241 of the insulating rod 240, so that the coupling state is maintained and perfect airtightness is maintained.

That is, the insulating layer 350 is bound to the enclosure A by a setting nut 102 coupled to the setting hole 353 in correspondence with the setting hole 353, and the insulating layer 350 is connected to the upper end surface of the insulating housing 100 The space portion R of the insulating housing 100 and the exposed ends of the voltage detecting devices 310 and 321 and the one-side current transformer 320 are sealed.

In other words, the insulating rod 240 is connected to the movable contact terminal 220 of the vacuum interrupter 210 constituting the main circuit opening / closing part 200 so that the opening / closing operation is performed under the control of the movable contact terminal 220 And the insulating rod 240 is exposed to the outside while being sealed by the insulating layer 350 so that the internal space R of the insulating housing 100 and the voltage detecting devices 310 and 321, (A) portion of the operation unit can be maintained to be completely watertight. Therefore, when the waterproofing treatment of the enclosure (A) is provided, waterproofing is provided even when immersed in underground use.

In order to alleviate the electric field intensity concentrated on the main circuit switching part 200, a voltage screen 270 is disposed on the top and the bottom and is formed by injection molding.

According to the present invention, the body of the vacuum interrupter 210 is assembled to the main circuit conductor 260, the voltage detecting devices 310 and 321 and the current transformer 320 are disposed on both sides of the vacuum interrupter 210, Devices 310 and 321 connect the main circuit conductors 260 and place them in a mold.

A voltage screen 270 is disposed on the upper and lower surfaces of the main circuit conductor 260 and the upper surface of the main circuit conductor 260 is fixed to the fixed contact terminal 230 of the vacuum interrupter 210 by a fastening member such as a stud bolt B / The connection conductors 250 are assembled and arranged.

In this state, the insulating housing 100 is molded on the outside by injecting epoxy insulation.

At this time, the upper portion of the movable contact terminal 220 of the vacuum interrupter 210 is formed in a state of forming the inner space R of the enclosure engaging portion 110 to be coupled to the enclosure A of the manipulating device.

The separately formed insulating rod 240 is assembled to the upper portion of the movable contact terminal 220 of the vacuum interrupter 210 by a fastening member such as a stud bolt (B / T).

The insulating film 350 is assembled to the outer casing A of the actuator while the insulating rod 350 is assembled to the end of the outer casing coupling part 110 of the insulating housing 100. [

The present invention is applied by connecting the load switch and the breaker of the present invention to the ground and the underground in one or more circuits as necessary.

As shown in FIG. 7, when the present invention is applied to two or more circuits, the phase-connected connecting material 400 is used to connect the respective circuits of the same phase.

As shown in FIG. 7, the present invention can apply the elbow connection 500 without performing the grounding operation for discharging the charging current of the underground cable and for the safety of the worker in the insulating housing 100.

The core technology of the present invention,

First, the present invention can be constituted by an insulating housing 100 which insulates a single main circuit opening / closing part 200, thereby minimizing volume reduction and defective molding rate.

Secondly, the present invention is to provide an insulating film 350 having a unique structure in the main circuit opening / closing part 200 of the insulating housing 100 so as to be compatible with both ground and underground purposes.

Third, the present invention does not constitute a ground circuit opening / closing part in the inside of the insulating housing 100, thereby reducing the overall volume and reducing the manufacturing cost and achieving the grounding purpose by the elbow connecting material from the outside.

Fourth, the present invention can simultaneously operate the ground fault, the ground, and the submergence by configuring the voltage detector and the current transformer capable of measuring voltage and current inside the load switch and the circuit breaker, thereby enhancing the reliability of the product.

Although the present invention has been described in connection with certain exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. Therefore, the scope of the present invention should not be limited by the embodiments described, but should be determined by the claims equivalent to the claims, as well as the claims.

The present invention can be combined with ground and underground due to undergrounding of distribution lines in urban areas in recent years, thus ensuring versatility.

100: Insulation housing 110: Enclosure coupling part
120: phase connecting bushing part 130: main circuit bushing part
200: Main circuit opening / closing part
210: vacuum interrupter 220: movable contact terminal
230: fixed contact terminal 240: insulating rod
250: phase connection conductor 260: main circuit conductor
310, 321: Voltage detection device 320: Current transformer
350: insulating film 351:
352: extensible valve 353: setting ball

Claims (5)

The main circuit bushing portion is formed on the lower side and the upper connection bushing portion is formed on the upper portion by the epoxy insulating material, and a single main circuit opening / closing portion is formed in the inside, and at the same time, The present invention relates to an epoxy molding insulation type multi-circuit load switch and a circuit breaker, which are constituted by an insulation housing of an insulation type and an insulation housing, each of which is inserted into the insulation housing at both sides of the main circuit opening / closing part,
A current transformer connected to the voltage detecting device on the side of the main circuit bushing as one side of the main circuit opening / closing part;
An insulating film assembled to an end portion of the upper housing coupling portion of the insulating housing to seal and connect the inside of the current transformer, the voltage detecting device, and the main circuit opening / closing portion; And
A main circuit conductor connected to the voltage detecting device and connected to the main circuit opening / closing part, coupled to the main circuit bushing by insert molding, and connected to the elbow connecting material;
Ground epoxy resin molded insulating multi-circuit load switch and breaker.
The method according to claim 1,
The main circuit switching unit is connected to the movable contact terminal of a normal vacuum interrupter and an insulating rod is connected to the switching unit so that opening and closing operations are performed under the control of the movable contact terminal and the insulating film is connected to the upper end of the insulating housing, Wherein the outer circumferential surface of the insulating rod to be operated is sealed and the exposed portion of each of the connecting conductors of the voltage detecting device and the current transformer is tightly adhered to the enclosure so as to seal the exposed portions of the connecting conductors. breaker.
3. The method according to claim 1 or 2,
Wherein the insulating film has a contact protrusion in close contact with a recessed portion formed in an upper end portion of the insulating housing and a contact protrusion which is accommodated in a space portion of the insulating housing and tightly coupled to an outer circumferential surface of the insulating rod, And a plurality of connecting conductors penetrating through the concentric circles corresponding to the respective setting nuts concentrically joined to the upper end of the insulating housing between the contact protrusions and the extensible plate, And a setting hole penetrating through the end portion in correspondence with the end portion of the grounding and grounding epoxy molding insulation type multi-circuit load switch and the circuit breaker.
The method of claim 3,
Wherein the expansion and contraction valve film of the insulating film is formed by forming an O-ring at an end portion of an inner circumferential surface thereof, and sealing the O-ring by elastic contact with an O-ring groove formed in an outer circumferential surface of the insulating rod, thereby sealing the grounding and underground epoxy- .
The method according to claim 1,
The outer surface of the insulating housing is formed with a conductive paint to form a paint film (paint film), except for the interface between the upper bushing portion and the main circuit bushing portion, so that the wire can be safely operated without being electrically charged during flooding. Ground and in-ground epoxy-molded insulating multi-circuit load switchgear and circuit breaker.

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