KR100379867B1 - An elbow connector for pad mounted transformer with fuse mounted inside - Google Patents

Abstract

The present invention relates to a connection material for connecting a high voltage power line and a pad mounted transformer, and an object of the present invention is to provide a function of the fuse in a state in which a fuse for protecting the primary side of the ground mounted transformer is embedded. It is configured to be performed outside of transformer, so that maintenance is provided at the outside of transformer in case of short circuit of fuse, providing safety and convenience of transformer maintenance and at the same time with other transformer in case of fuse accident. It is to provide a fuse-embedded elbow connection material for a transformer that can be supplied to the branch side to provide ease of use.

The object of the present invention is to assemble the upper connector 10 formed in the elbow type to be connected to the conventional high-pressure bushing 30, and the elbow connector (42, 43) connecting the normal input and output power lines (40, 41) The lower connector 20 is formed by connecting and connecting the input and output outlets 26 and 27, and the insulators 11, 12, 21, and 22 of the semiconductive layer of the upper and lower connectors 10 and 20 are assembled. It is achieved by a transformer-embedded elbow connecting member, characterized in that the primary side protection fuse 50 for connecting and connecting the high-pressure bushing 30 and the input and output elbow connection ports 42 and 43 are assembled.

The present invention has the effect of improving the productivity of the transformer by the simplification of the internal circuit of the existing ground-mounted transformer, the inspection, maintenance and repair of the primary protection fuse is easily provided to the outside, and the primary protection fuse In the event of an accident, there is a reliability effect of a product that can supply power on the branch side.

Description

Fuse-embedded elbow connector for transformers {AN ELBOW CONNECTOR FOR PAD MOUNTED TRANSFORMER WITH FUSE MOUNTED INSIDE}

The present invention relates to a connection material for connecting a high voltage power line and a pad mounted transformer, and more particularly, to perform a function of the fuse with a built-in fuse for protecting the primary side of the ground mounted transformer. Is designed to be performed outside of the transformer, so that maintenance is provided simply outside the transformer in the event of a short circuit of the fuse, providing safety and convenience of transformer maintenance. The present invention relates to a fuse-embedded elbow connection material for a transformer, which is capable of supplying power to the side, thereby providing convenience of use.

In general, ground-mounted transformers are unable to supply electric power by installing wiring lines to electric poles due to the poor environment of urban exterior or column transformers due to the complexity and density of cities in recent years. In this case, the transformer is installed on the ground in a rectangular parallelepiped enclosure.

1 is a schematic internal configuration diagram of a ground-mounted transformer used in 6.6 kW and 22.9 kW underground distribution lines that are currently used, and power is drawn into the transformer tank from the power cable 100 on the wall 200 of the transformer. The high pressure bushing 300 is installed at the portion to perform insulation maintenance with the enclosure of the transformer, and the elbow connection member 400 connected to the end of the power cable 100 is connected to the high voltage bushing 300. The inside of the transformer is connected between the high voltage bushing (300) and the transformer coil (500) inside the transformer is a dual element fuse (Bay-o-net Fuse) 600 to protect the secondary side overload of the transformer (600) ) And operates during the internal breakdown of the transformer (short-circuit accident), and the primary protection fuse (CLFuse) 700 for suppressing the accident propagation to the transformer primary side line is constructed.

These transformers were filled with insulating oil (I.O) to maintain the connection or insulation of the various components existing inside.

When a transformer generates an abnormal voltage due to a lightning strike or an open / close surge, etc., and intrudes into the primary side, which is a high voltage distribution, the transformer blocks the internal circuit by short-circuit of the primary side protection fuse 700 to cut off the internal circuit. Due to the rapid internal pressure increase, the explosion of the transformer, high temperature insulating oil and gas are scattered to prevent the risk of human and property damage.

However, the structure of such a transformer is that the primary protection fuse 700 is installed inside the transformer, in case of contact, malfunction or short circuit caused by external factors or internal hazards, In order to repair, it is necessary to replace or repair the internal primary protection fuse, which is a disadvantage in that maintenance and repair of transformers or regular safety checks are very difficult.

The present invention has been researched and developed to effectively solve the problems of the prior art as described above,

An object of the present invention is to enable the safety of the primary side protection fuse (CL Fuse) to perform the primary side protection of the ground-mounted transformer safely from the outside of the transformer, and at the same time in the event of a short circuit accident of the primary side protection fuse, the outside of the transformer The maintenance is provided in the present invention to provide a transformer built-in elbow connection material for transformer safety and convenience of inspection, maximizing the reliability of the product.

It is an object of the present invention to provide a transformer-embedded elbow connection material that maximizes the reliability of a product by preventing accidents such as leakage of insulating oil of a transformer due to the accident of a safety accident caused by a malfunction of a primary protection fuse of a transformer. Is in.

The present invention provides a fuse-embedded elbow connecting material for maximizing safety and productivity by simplifying an internal circuit of a transformer.

An object of the present invention is to provide a fuse-embedded elbow connection material for a transformer that can be supplied with power to the branch side with other transformers installed in the event of an accident of the protective fuse is provided with ease of use.

The object of the present invention consists of an upper connector formed in the elbow type to be connected to a conventional high-pressure bushing, and an elbow connector for connecting the normal input and output power lines can be assembled, the lower connector formed by protruding the output branch. It is achieved by a transformer-embedded elbow connecting member formed in a centrally separated type while protecting the primary protective fuse which is embedded in the insulator of the semiconducting layer of the upper and lower connection ports and connects the high voltage bushing and the input and output elbow connectors.

In addition, the fuse-embedded elbow connection material for transformers of the present invention, each phase, the lower insulator protrudes to one side of the upper, lower semiconducting layer in order to facilitate the voltage detection when the upper and lower connectors are separated. The test point of the aluminum material is achieved by insert-molding elbow joints for transformers, which are insert-molded, flat washers contact-fastened with fastening screws and covered with insulating caps for external insulation.

1 is a schematic layout view of the internal components of a typical ground-mounted transformer,

2 is a perspective view of the present invention,

3 is a front configuration diagram of the present invention;

4 is a cross-sectional view taken along the line A-A of FIG.

5 is an enlarged view of an excerpt “F” of FIG. 4;

Figure 6 is an enlarged view of the "G" portion of Figure 4,

Figure 7 is an enlarged view of the "H" portion of Figure 4,

8 is a cross-sectional view taken along the line B-B of FIG.

9 is an enlarged view of an excerpt "K" of FIG. 8;

10 is an exploded view of the inner constituent member as a sectional view of the upper connector;

11 is an exploded view of an internal constituent member as a sectional view of a lower connector;

12 is a side cross-sectional configuration of the engaged state of FIG.

Figure 13 is a side cross-sectional configuration of the engaged state of Figure 11,

14 is a state diagram using the present invention,

<Description of Symbols for Major Parts of Drawings>

10: upper connector 11: upper outer semiconducting layer

12: upper insulator 15: upper inner semiconducting layer

16: upper connection fuse screw 17: bushing connection screw

20: lower connector 21: lower outer semiconducting layer

22: lower insulator 23: multi-tap

25: lower inner semiconductor layer 26: input branch mechanism

27: output split mechanism 28, 29: screwing hole

30: Lower connection fuse screw 31: Intermediate connection screw

35: branch connection rod 50: primary side protection fuse

60: fixed band 70: voltage detector

71: test point 72: flat washer

73: tightening screw 74: insulation cap

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

That is, the present invention, as shown in the accompanying drawings, Figures 2 to 13, the bushing fitting hole 13 and the primary side protection fuse in which the normal high-pressure bushing 30 is fitted in the upper outer semiconducting layer 11 of the elbow type. The upper insulator 12 of the semiconducting layer is formed by penetrating the upper fuse inserting hole 14 so as to cover the upper part at the center of the upper part 50, and the bushing fitting hole 13 and the upper fuse inserting hole 14 are formed. An elbow type upper inner semiconducting layer 15, into which the upper end of the primary side protection fuse 50 is fitted, is molded and coupled to the bent portion, and the upper inner semiconducting layer 15 includes an upper connection fuse screw 16 and the upper portion thereof. An upper connector 10 which is assembled with a connection fuse screw and a bushing connecting screw 17 protruding into the bushing fitting hole 13;

An inlet and output outlet mechanism is formed by forming threaded holes 28 and 29 therein so that the elbow fittings 42 and 43 are fitted into the lower one side of the inverse “T” lower outer semiconducting layer 21. 26 and 27, and a semiconductive lower insulator 22 having a lower fuse inserting hole 24 formed therein to protect the lower portion at the center of the primary side protection fuse 50,

The lower inner semiconducting layer 25 into which the lower end of the primary side protection fuse 50 is fitted is assembled to the inner lower side of the lower fuse inserting hole 24, and the lower inner semiconducting layer 25 is formed inside the lower side. Lower connection fuse screw 30, an intermediate connection screw 31 which is elastically connected to a multi-tap 23 installed therein while the lower connection fuse screw is fitted, and a branch assembled with the intermediate connection screw in a vertical vertical direction. The lower insulator 22 with the connection rod 35 and the input and output connection screws 32 and 33 screwed into the input and output distribution mechanisms 26 and 27 in both horizontal directions of the branch connection rod. Consists of forming and coupled to the lower splice 20,

The upper portion of the primary side protection fuse 50 is assembled by screwing to the upper connection fuse screw 16 through the upper fuse fitting hole 14 of the upper insulator 12, and the lower portion of the lower insulator 22. The lower part of the primary protective fuse 50 is assembled by screwing to the lower fuse connection screw 30 through the fuse fitting hole 24, and the lower and upper insulators 12 of the upper outer semiconducting layer 11 are assembled. The stepped groove portion 12a of the lower stepped groove portion 21a of the lower outer semiconducting layer 21 and the stepped groove portion 22a of the lower insulator 22 are wrapped and bound to the fixing band 60 from the outside to connect the upper connection hole ( 10) and the lower connector 20 is assembled.

In this case, the upper connector 10 is located on the outer side of the upper outer semiconducting layer 11 on the opposite side of the bushing fitting hole 13 for ease of operation according to the separation of the upper and lower connectors 10 and 20. It is made by combining molding the separation support 45,

In addition, each of the upper and lower insulators 12 and 22 may include one of the upper and lower outer semiconducting layers 11 and 21 in order to facilitate voltage detection when the upper and lower connectors 10 and 20 are separated. The test point 71 of the aluminum material is insert-molded in an exposed state on the side, and the flat washer 72 is fixed in contact with the fastening screw 73, and the voltage detecting part in which the insulating cap 74 for external insulation is sealed is assembled. 70 is configured.

In addition, the upper and lower connection ports 10 and 20 are connected to the earth and the conducting wire so that the electric potential is equal to the electric potential of the earth, so as to prevent an electric shock accident or to prevent an obstacle due to mixing. Ground line connecting rings 75 and 75 for connecting a normal ground line are formed on one side of the lower outer semiconducting layers 11 and 21, respectively.

In the drawings, reference numerals 17a and 30a illustrate hexagonal wrench holes for screw tightening.

The present invention, as shown in Figure 14, by assembling by fitting the bushing fitting hole 13 formed in the upper connector 10 of the present invention to the high-pressure bushing 30 to maintain the insulation with the conventional transformer enclosure Connect and install with internal bushing connection screw (17),

The elbow connector (42,43) connecting the input and output power lines (40, 41) connected to a conventional consumer or another transformer is inserted into the input and output outlets (26, 27) of the lower connector (20). The input and output connection screws 32 and 33 of the output distributors 26 and 27 are connected to the elbow connection ports 42 and 43, and the upper and lower connection ports 10 and 20 have separate fixing bands (not shown). It will be installed to be firmly fixed to the enclosure of the transformer.

The present invention installed as described above is the voltage detection unit 70 respectively configured in the upper and lower connection ports 10 and 20 at the time of inspecting the primary protective fuse 50 in which the upper connection port 10 and the lower connection port 20 are built-in. In (70), it is checked whether there is an abnormality of the primary protection fuse therein as the voltage detection.

That is, the inspector separates the insulating caps 74 of the voltage detectors 70 and 70 and contacts the flat washer 72 with a separate voltage detection tester (not shown) to safely check the voltage. If there is an abnormality such as a failure of the primary protective fuse therein by the inspection, the high pressure bushing 30 and the elbow fittings 42 and 43 are separated from the lower fitting 20.

In such a state, the binding fixtures of the upper connector 10 and the lower connector 20 are loosened, and a separate jig for separating the upper connector 10 is clamped by using a separate jig (Hot-Stick). After pulling forward, the present invention attached to the transformer is separated from the high-pressure bushing 30, and then releases the fixing band 60 fixing the upper connector 10 and the lower connector 20, and then the upper connector 10 to the upper side. Towing is separated from the lower connector (20).

At this time, the primary protective fuse 50 is the upper, lower portion of the upper, the lower connection port 10 of the upper, lower connection fuse screw (16, 30) screw assembled state or the lower connection fuse screw 30 Since the fitting method is assembled to the intermediate connection screw 31, the primary side protection fuse 50 is easily drawn out and separated from the lower connection fuse screw 30 in a screw-assembled state.

In this state, the lower connection fuse screw 30 is unscrewed from the primary side protection fuse 50 by unscrewing, and the first side protection fuse 50 is unscrewed from the upper connection fuse screw 16 and the upper connection port ( Remove from 10) or replace with a new one, reassemble to the upper connection port 10 in the reverse order, and insert the lower connection fuse screw 30 into the intermediate connection screw 31, assembled into the multi-tap (23) By assembling the upper connector 10 to the lower connector 20 in a solid connection state again and bound to the fixing band 60 to install the present invention in the order mentioned above again.

In the present invention, as mentioned above, the inspection of the primary protective fuse 50 is easily provided at the outside of the transformer, and the maintenance is also easy.

In addition, the present invention is one of the present invention installed in each transformer when installed in conjunction with the other transformer, even if a failure such as a short circuit in the primary protection fuse 50 of the present invention, 26 and 27 are formed solely so that the energization between the transformers is continuously progressed so that there is no inconvenience that the power supply of the customer is cut off, thereby ensuring sufficient function as the connection material between the transformers.

In addition, according to the present invention, the primary protective fuse 50 is insert-molded in the upper, lower outer semiconducting layers 11 and 21, and the upper and lower inner semiconducting layers 16 and 30 of an external relatively hard EPDM rubber material. The upper and lower insulators 12 and 22 of the buffering EPDM rubber material are safely protected to protect against external shocks, and the insulation from the outside is ensured to maximize the reliability of the product.

As described above, the present invention has the effect of improving the productivity of the transformer by the simplification of the internal circuit of the existing ground-mounted transformer, the effect that the inspection, maintenance and repair of the primary protection fuse is easily provided to the outside, Even in the event of a primary protection fuse, there is a reliability effect of a product that can supply power to the branch side.

Claims (7)

The upper connector 10 formed in the elbow type to be connected to the normal high-pressure bushing 30 and the elbow connectors 42 and 43 connecting the ordinary input and output power lines 40 and 41 can be assembled. The lower connector 20 protruding from the lower connector 20 is assembled to be connected to the lower connector 20, and the high voltage bushing 30 is disposed in the insulators 11, 12, 21, 22 of the semiconductive layer of the upper and lower connectors 10 and 20. In the fuse-embedded elbow connector for a transformer configured to assemble and protect the primary protection fuse (50) connecting and connecting the input and output elbow connections (42, 43), The upper connector 10 is wrapped around the upper portion in the center of the bushing fitting hole 13 and the primary protective fuse 50 in which the high-pressure bushing 30 is fitted into the upper outer semiconducting layer 11 of the elbow type. The upper insulator 12 is formed by penetrating the upper fuse insertion hole 14, The elbow-type upper inner semiconducting layer 15, into which the upper end of the primary side protective fuse 50 is fitted, is molded at the bent portion of the bushing fitting hole 13 and the upper fuse inserting hole 14, and the upper inner portion The semiconducting layer 15 is assembled with an upper connection fuse screw 16 and a bushing connection screw 17 which is screwed with the upper connection fuse screw to protrude into the bushing fitting hole 13. Fuse-embedded elbow connector. delete According to claim 1, The lower connector 20 is threaded holes (28,29) therein so that the elbow connector (42, 43) is fitted to the lower one side in the reverse "T" -shaped lower outer semiconducting layer (21) ) And a semiconductive lower insulator having protruding molded input and output distribution mechanisms 26 and 27 and a lower fuse inserting hole 24 to protect the lower portion at the center of the primary protective fuse 50. 22) is molded, The lower inner semiconductive layer 25 into which the lower end of the primary side protection fuse 50 is fitted to the inner lower side of the lower fuse inserting hole 24 is molded and coupled to the lower connection fuse screw 30 inside the lower side thereof. Intermediate connecting screw 31, which is elastically connected with the multi-tap 23 installed therein while the lower connecting fuse screw is fitted, the branch connecting rod 35 assembled with the intermediate connecting screw in the center vertical direction, and this branch Characterized in that the input and output connection screws (32, 33) are molded into the lower insulator (22) in a state where the input and output connection screws (32, 33) are screwed in the horizontal direction on both sides of the connection rod. Fuse-embedded elbow connector for transformer. The primary protection fuse of claim 1 or 3, wherein the primary side protection fuse 50 is connected to the upper connection fuse screw 16 through the upper fuse fitting hole 14 of the upper insulator 12. The upper part of the upper part 50 is assembled by screwing, the lower part is assembled by screwing through the lower fuse fitting hole 24 of the lower insulator 22, and the lower outer conductive layer ( 11, the lower stepped projections 12a of the lower and upper insulators 12 are surrounded by the stepped grooves 21a of the lower outer semiconducting layer 21 and the stepped grooves 22a of the lower insulators 22 and fixed bands from the outside. A fuse-embedded elbow connection member for a transformer, characterized in that the upper connection port 10 and the lower connection port 20 are assembled by binding to (60). According to claim 1, wherein the upper connector 10 is formed by coupling the separation support 45 to the outside of the upper outer semiconducting layer 11 on the opposite side of the bushing fitting hole (13). Fuse-embedded elbow connector for transformer. The upper and lower insulators 12 and 22 of the upper and lower connectors 10 and 20 are disposed on one side of the upper and lower outer semiconducting layers 11 and 21, respectively. The test point 71 of the aluminum material is insert-molded in an exposed state so that the flat washer 72 is fixed in contact with the fastening screw 73, and the voltage detecting part 70 in which the insulating cap 74 for external insulation is sealed is assembled. Fuse-embedded elbow connection material for transformer, characterized in that formed by). According to claim 1, wherein the upper and lower connection ports (10, 20) is formed with a ground wire connecting ring (75, 75) for connecting a normal ground wire to each of the one side of the upper, lower outer semiconducting layers (11, 21) Fuse-embedded elbow connection material for transformer, characterized in that the made.