KR100805224B1 - Elbor Connector Seperation Device and The No Blackout Method for Underground Cable Using The Same - Google Patents

Abstract

The present invention discloses a construction method and an elbow connection material separating apparatus for the uninterruptible construction in the underground ship, the elbow connection material separating apparatus comprises a plurality of elbow insulating cover; A cover fixing frame; Mainframe; It consists of a panel part. In addition, the uninterruptible method is to cut off the power to underground equipment to be repaired or replaced by using the elbow connector separating device, and to supply low-voltage electricity to the low-voltage cable supplied to the consumer by using a construction transformer.

Elbow Connection Material Separator, Uninterruptible Method, Construction Transformer

Description

Elbow Connector Seperation Device and The No Blackout Method for Underground Cable Using The Same}

1 is a perspective view showing the appearance of the ground transformer;

2 is an exploded cross-sectional view of the elbow connecting member and the bushing.

3 is an external view of the ground transformer connected to the underground cable

Figure 4 shows the shape of a conventional elbow separator.

5 is a perspective view of an insulating bushing.

Figure 6 is a view showing a form using the insulating bushing mounted on the parking stand.

Figure 7 is a perspective view showing the shape of the insulating cap.

8 is a conventional uninterruptible construction method applied to the overhead line.

9 is a diagram showing the layout of the underground equipment of the underground ship.

10 is a view showing the elbow connecting material and the elbow insulation cover.

11 is a view showing a coupling relationship between the elbow connecting material and the elbow insulating cover.

Figure 12 is a view showing the shape of the elbow insulating cover fitted to the elbow connecting material.

Figure 13 is a perspective view showing the shape of the cover fixing frame.

14 is a perspective view showing the elbow insulation cover is fixed to the cover fixing frame.

15 is a perspective view showing the appearance of the panel portion;

16 is a cross-sectional view showing the operating relationship of the coupling means.

17 is a perspective view showing a form in which the main frame is installed in the ground transformer.

18 is a view showing an operation relationship of the elbow connector separating apparatus.

19 to 32 are views showing an uninterruptible process of the present invention.

** Explanation of Signs of Major Parts of Drawings **

1: ground transformer 30: elbow connector

100: elbow insulation cover 200: cover fixing frame 300: panel portion

400: mainframe 800: construction transformer

The present invention relates to an elbow connection member separating device for ground-mounted underground equipment, and more particularly, between a ground transformer or an installed ground transformer that receives electricity from a underground cable carrying high pressure electricity and converts it to low pressure. The present invention relates to a device for separating elbow connecting members connected to underground cable in ground switchgear (hereinafter referred to as 'ground machinery').

In Korea, electricity generated by using hydroelectric power, thermal power, nuclear power, etc., has a voltage of about 1 to 50,000 volts, which is boosted to 154,000 volts or 345,000 volts in a high-voltage substation. The low pressure substation will be sent to a low voltage substation, where it will be decompressed to 22,000 to 66,000 volts and transmitted to a transformer near the customer. The electricity transmitted to the transformer near the customer is reduced to 220 volts and supplied to the customer.

On the path to supply electricity to the power plants, there is a section of overhead lines connected through steel towers and underground lines to bury wires in the ground.In recent years, when designing a new city through urban development, most underground lines In addition, the existing overhead line section is being replaced by underground lines for urban aesthetics.

However, in the case of adopting a transmission method using overhead lines, various electric works such as transformer repair or power pole replacement can be performed while continuously supplying electricity to customers by using uninterruptible power distribution methods such as Korean Patent Nos. 355492 and 407376. However, when the underground transmission system is adopted, it is very dangerous to remove the underground cable from the ground transformers near the customer, so it is necessary to perform various electric works in a state in which the power failure is notified and the electricity is cut off.

In case of using the underground cable method, the uninterruptible method as described above cannot be used. As the structure of the transformer to be installed is different, it is difficult to apply the uninterruptible method of the overhead cable method, and the live underground cable is separated from the underground equipment. It is difficult to give itself.

The ground transformer 1 used for transforming or opening and closing the underground line has an intermediate wall divided into a high pressure side wall 20 and a low pressure side wall 50 in an enclosure 10 having an opening and closing door 12 as shown in FIG. 1. 6 high bushings 22 are installed on the high voltage side wall, and an insulating bushing for mounting the elbow connection material of the underground cable separated during construction is installed and a parking stand for mounting the elbow connection material. There are 5 installed. Ground switchgear, which is one of the underground devices, has a structure similar to that of the high pressure side wall 20 of the ground transformer, and can be opened and closed by a switch. In FIG. 1, some reference numerals are omitted for the same components. Those skilled in the art can understand that the components having the same shape and structure in the drawings are the same components even if the reference numerals are omitted, so that duplicate reference numerals will be omitted in the following drawings as necessary. .

Although the ground transformer 1 will be described below, the technical idea of the present invention may be applied to the ground switchgear having a similar structure as described above.

The size and position of the bushing 22 and the parking stand 24 of the ground transformer 1 are specified by the KEPCO standard. In addition, the low pressure side wall 50 is provided with four terminals 54 (A, B, C, N poles) for supplying electricity to each customer.

The underground cable 34 is connected to the elbow connecting member 30 as shown in Figure 2 is connected to the bushing 22 of the ground transformer (1). The elbow connection member 30 is electrically connected to a contact terminal (not shown) in the bushing 22 through a contact rod 32 in the center thereof, and the contact rod 32 is formed of a conductive layer 37 and a crimp terminal ( It is connected to the underground cable 34 through 36).

The elbow connecting member 30 is provided with an insulating layer 35 inside and a shielding layer 33 outside to protect the worker from high voltage electricity. The elbow connecting member 30 is provided with a voltage detecting unit 31 to determine whether a load is applied to the elbow connecting member. And so on.

3 shows a typical use form in which the elbow connecting member 30 in which the underground cable 34 is connected to the ground transformer 1 is inserted, and the three underground cable 34 in each of the left and right sides are transformed inside the transformer 1. The device (not shown) not only supplies low voltage electricity to the consumer, but also forms a loop circuit that supplies electricity to a nearby transformer. In addition, a cable 52 for supplying electricity to the low pressure side wall 50 is connected to the low pressure terminal 54.

Conventionally, the uninterrupted construction method for overhead lines has been developed, but the underground line had no choice but to replace or repair the ground transformer after the power failure was announced. To do this, separate elbow connections from adjacent ground transformers connected to the ground transformer to be replaced or repaired, so that power is not supplied to the ground transformer to be replaced / repaired, and then replaced, or a switch normally located between four to five transformers. There are two ways to do this after shutting off the power supply to the transformer. However, the elbow connecting member 30 is not only exposed to the contact rod 32 to the outside, but also a high voltage current of 20,000 volts or more, so if the mistake of separating the elbow connecting member 30 from the bushing 22 In addition, it is managed to perform construction after shutting off the switch because it may take the life of worker.

As described above, the biggest obstacle in developing the uninterruptible method of the ground transformer is to separate the elbow connecting member 30 coupled to the bushing 22 of the ground transformer.

In foreign countries, the elbow separator 60 as shown in FIG. 4 is used for this operation, and the connecting ring 62 is inserted into the operating ring 38 of the elbow connecting member 30 and the connecting ring 62 through the handle 64. ) And the operation ring 38 are tightly coupled, and then the elbow connecting member 30 is separated from the bushing 22 by hand.

The separated elbow connecting member 30 is mounted on the insulating bushing 70 shown in FIG. 5 installed on the parking stand 24 of the ground transformer 1, and the bushing 22 of the ground transformer 1 is mounted as shown in FIG. Insert insulation cap 90 to insulate.

The insulating bushing 70 of FIG. 5 includes a bracket 72 fitted to the parking stand 24, an insulating epoxy portion 76 having the same shape and size as the bushing 22, and a parking stand 24. After it is composed of an eye bolt 74 for fixing it, it serves to safely insulate the elbow connection member 30.

FIG. 6 illustrates a shape in which the elbow connecting member 30 at the lower right end is inserted into the insulating bushing 70 after the insulating bushing 70 is installed in the parking stand 24. The insulating cap 90 as shown in FIG. 7 is inserted into the bushing 22 in which the elbow connecting member 30 is removed, thereby insulating and shielding functions.

As described above, when the operator drops the elbow separator 60 in the process of separating the elbow connecting member 30 from the bushing 22 by using the elbow separator 60 during the series of operations as described above, a large accident occurs. In addition, when the contact rod 32 and the through hole 23 inside the bushing 22 are eccentric with each other while the elbow connecting member 30 is separated from the bushing 22, sparks or the like may occur to form the contact rod 32 or the like. Because of damaging the bushing 22, it was difficult to separate the elbow connecting member 30 by hand.

 In particular, when using the conventional elbow separator 60, it is important to work so that the contact rod 32 and the through hole 23 is not eccentric, but many variables are generated according to the height or skill of the operator, so the elbow separator 60 in Korea. ) Is forbidden to work with. .

Therefore, it is urgent to develop a device capable of safely removing the elbow connection member 30 from the bushing 22, that is, a device capable of safely separating the underground cable from the ground transformer. In this regard, the present applicant has disclosed an elbow connecting member separating apparatus that can safely separate the elbow connecting member from the ground transformer through the patent application 10-2005-83930.

In addition, the present invention is to improve the ease of use of the conventional elbow connector separating device of the applicant, light weight to improve the field applicability, and discloses an uninterruptible construction method of underground lines using such elbow connecting material separating device.

8 shows a conventional uninterruptible construction method applied to overhead lines,

In order to replace the transformer 850 in the electric pole of FIG. 8, the clamp is applied to the high voltage line 810 of the electric pole 820 to supply electricity to the construction transformer 800, and in the construction transformer 800, the transformer is transformed to low pressure. The low pressure supply cable 840 is used to supply the low voltage line 830 connected from the transformer 850 to the customer 870. In the case of the low voltage line 830 in FIG. 8 and below, each cable must be connected from the four terminals so as to match the polarity, and only a single line is shown in the drawing.

Then, the switch (COS, Cut Out Switch) is installed between the high voltage line 810 and the transformer 850 of the pole so that the high-voltage electricity is not supplied to the transformer 850, repair the transformer 850 or Will be replaced. This allows the transformer to be replaced uninterrupted without interrupting the supply of electricity to the consumer side.

However, in the case of underground cable, as shown in FIG. 9, four to five transformers 910, 920, 930, and 940 are each provided with switchgear 900 and 950, and the connection of the wires installed in the transformer is made through the elbow connecting member. Not only can not be installed clamps, but because of the loop-type power transmission method, even if the cable is disconnected from the transformer, because the cable is in a live state, there was a problem that this method is not applicable.

The main object of the present invention is to provide an apparatus capable of safely separating an elbow connecting member from a bushing. In addition, another object of the present invention is to provide an uninterruptible construction method that can replace or repair the ground transformer installed in the underground ship using the elbow connection member separation device as described above.

The elbow connection member separating apparatus of the present invention devised to achieve the above object,

An elbow fitting groove for inserting an elbow connecting member therein, and a fixing frame made of an insulating material, a connecting ring insertable into an operating ring of an elbow connecting member fitted to the elbow fitting groove, and a binding mechanism for adjusting the detachment of the connecting ring. A plurality of elbow insulating covers comprising a binding handle for tightly binding the elbow connecting member and the elbow fitting groove by operating the binding mechanism, and an assembling means for external connection;

A cover fixing frame having a first through hole and external connecting means for fixing the plurality of elbow insulating covers, respectively;

A drawing rod, a guide rod for preventing rotation of the drawing rod and guiding the drawing direction, a connection plate connected to the cover fixing frame by an external connection means of the cover fixing frame and connected to one end of the guide rod, and a drawing rod A subframe having a cylinder connected to the cylinder, and having a through hole for guiding the guide rod, wherein the cylinder is mounted;

A main frame including a transfer unit for moving the subframes back, front, left, and down;

A mounting plate, a bracket coupled to the parking stand of the ground transformer, and a bracket provided on the rear side of the mounting plate, an elbow value bushing attached to the front of the mounting plate to insert the withdrawn elbow connecting member, and the bracket or elbow value bushing Characterized in that consisting of; panel portion consisting of a coupling means that can be coupled to move to the left and right.

The main frame is preferably further provided with a fastening portion that can be fixed to the ground transformer.

In addition, the uninterruptible method of the present invention.

A second underground device connected to the underground line that is transmitted in a loop form and having a repair / replacement target, a first underground device located on one side of the second underground device and connected to a second underground device, and the second underground device In the uninterruptible construction method for underground ships, including a third underground device located on the other side of and having a track connected to the second underground device,

Connecting the first underground equipment and the elbow connecting material separating device to connect the elbow connecting material and the elbow connecting material separating device fitted to the second underground equipment side bushing of the first underground equipment (hereinafter referred to as 'step 1');

An elbow connecting member separating step (hereinafter referred to as 'step 2') of the first underground equipment, which removes the elbow connecting material of the first underground equipment from the bushing using an elbow connecting member separating device connected to the first underground equipment;

Connecting the second underground equipment and the elbow connecting material separating device to connect the elbow connecting material and the elbow connecting material separating device fitted to the first underground equipment side bushing of the second underground equipment (hereinafter referred to as 'step 3');

An elbow connecting member separating step (hereinafter referred to as 'step 4') of the second underground equipment, which removes the elbow connecting material of the second underground equipment from the bushing using an elbow connecting member separating device connected to the second underground equipment;

Inserting the elbow connection member of the construction transformer into the bushing side bushing of the first underground machine (hereinafter referred to as 'step A');

A low voltage cable connecting step (hereinafter referred to as 'step B') connecting the low voltage cable connected to the low voltage terminal of the second underground machine and the cable connected to the low voltage terminal of the construction transformer by a clamp;

A low voltage cable separating step (hereinafter referred to as 'step C') for separating the low voltage cable connected by the cable of the inlet distributor of the construction transformer and the low voltage cable connected by the clamp from the low voltage terminal of the second underground equipment;

Connecting the third underground equipment and the elbow connecting material separating device to connect the elbow connecting material and the elbow connecting material separating device inserted into the second underground equipment side bushing of the third underground equipment (hereinafter referred to as 'step 5');

An elbow connecting member separating step (hereinafter referred to as 'step 6') of the third underground equipment, which removes the elbow connecting material of the third underground equipment from the bushing using an elbow connecting member separating device connected to the third underground equipment;
Separating the elbow connecting member of the third underground equipment side of the second underground equipment (hereinafter referred to as 'step 7');

delete

Repairing or replacing the second underground machine (hereinafter referred to as 'step 8');

A low voltage cable connecting step (hereinafter referred to as 'step D') connecting the low voltage cable separated in the low voltage cable separating step to the low voltage terminal of the second underground machine;

An elbow connection step of the second underground device (hereinafter referred to as 'step 9'), which inserts an elbow connecting member into the third underground device side bushing of the second underground device;

An elbow connecting step of the third underground equipment (hereinafter referred to as 'step 10'), which inserts an elbow connecting member into the second underground equipment side bushing of the third underground equipment;

A construction transformer removing step (hereinafter referred to as E ') for removing the cable of the construction transformer from the first underground equipment and the second underground equipment;

An elbow connecting step of the second underground equipment (hereinafter referred to as 'step 11'), which inserts an elbow connecting member of the second underground equipment into the first underground equipment side bushing;

And an elbow connecting step (hereinafter referred to as 'step 12') of the first underground machine, which includes the elbow connecting member inserted into the second underground machine side bushing of the first underground machine.

The above-mentioned uninterruptible method is a case where the type of the first, second, third underground equipment is a ground transformer.

If the second underground equipment is a ground transformer and the third underground equipment is a ground breaker, the steps 5 and 6 may be switched off (hereinafter referred to as 'step 6-1'), and the step 10 Is replaced with the step of connecting the switch of the ground breaker (hereinafter referred to as 'step 10-1'), and the uninterrupted electric method for the underground line is possible.

In addition, in the case where the second underground equipment is a ground breaker, the construction of the underground ship may be performed by uninterruption if steps A to E are omitted.

Hereinafter, the elbow connector separating apparatus of the present invention will be described in more detail with reference to the accompanying drawings.

10 shows the elbow connecting member 30 and the elbow insulating cover 100. In order to use the elbow connector separating device is to fit the elbow connecting member 30 into the elbow fitting groove 110 processed in the fixing frame 102 of the elbow insulating cover 100 is coupled. Fixing frame 102 is made of an insulating material.

11 (A) (B) is a horizontal cross-sectional view showing the elbow connecting member 30 and the elbow insulating cover 100 is coupled, the elbow insulating cover 100 is inserted into the elbow connecting member 30, and then the elbow connecting member ( The binding mechanism 120 is operated to insert the connection ring 105 into the operation ring 38 of 30.

As shown in the drawing, the binding mechanism 120 is machined at the tip of the first fastening fastening hole 122 and the fastening adjustment screw 125 which are processed at a position away from the rotary shaft 106 in the connecting ring 105. The second fastening fastening hole 124 is coupled is composed of a connecting rod 123 for connecting the connection ring 105 and the binding adjusting screw 125 for the connection.

As described above, the binding mechanism 120 rotates the connection ring 105 as the binding screw 125 moves backward as the operation of the binding handle 126 is inserted into the operation ring 38 of the elbow connecting member 30. The elbow connecting member 30 and the elbow insulating cover 100 are brought into intimate contact with each other by the contact of the inserted connecting ring 105 and the operating ring 38.

As shown in FIG. 12, the three elbow connecting members 30 are respectively wrapped with the elbow insulating cover 100 in an operating relationship as shown in FIG. 11.

The three elbow insulation covers 100 are connected to each other by being fixed to the cover fixing frame 200 having the shape shown in FIG. 13 through the assembly means 128 for external connection of the elbow insulation cover 100.

External connection assembly means formed in the elbow insulation cover 100 in the present embodiment is made of a fixing handle having a screw portion coupled to the binding adjustment screw 125 projecting to the outside. The external connection assembling means may be any one that can be detachably connected to the elbow insulation cover 100 to the cover fixing frame 200.

The cover fixing frame 200 is provided with a first through hole 202 that can fix the elbow insulation cover 100 by inserting the adjusting adjustment screw 125 as described above, and also for connecting to the outside A second through hole 204 for external connection, which is an external connection means, is further provided. As will be described later, the external connection means can be any one that protrudes like a bolt and can connect with an external component.

 FIG. 14 illustrates a shape in which the elbow insulation cover 100 is integrally coupled by the cover fixing frame 200.

FIG. 15 shows a panel portion 300 fitted to the parking stand 24 of the ground transformer 1, which is a mounting plate 330 and a parking stand 24 of the ground transformer 1. And an elbow bent bushing 320 attached to the front surface of the mounting plate 330 to fit the bracket 310 provided on the rear surface of the mounting plate 330 and the drawn elbow connecting member 30. Bracket 310 or elbow value bushing 320 is made of a coupling means that can be coupled to move up, down, left and right.

Although the position of the bushing 22 and the parking stand 24 is determined by the specification of the ground transformer 1 as shown in FIG. 1, since these standards are not strictly controlled, the elbow separated from the bushing 22 is shown. Since the elbow connecting member 30 may be subjected to excessive deformation force when the connecting member 30 is simultaneously inserted into the elbow fitting bushing 320, the position of the bushing 22 and the parking stand 24 of the actual ground transformer 1 is used. There is a need for coupling means to bridge the gap.

An example of such a coupling means is shown in FIG. 16, but the coupling means shown in FIG. 16 is for explaining the bracket 310, but it is obvious that the coupling means may also be applied to the elbow beech bushing 320. In FIG. 16, the bracket 310 is coupled to the mounting plate 330 by a bolt 312 through the through hole 311. At this time, the diameter of the through hole 311 is smaller than the diameter of the head of the bolt 312, while larger than the diameter of the threaded portion 313 of the bolt 312, it is possible to move a little up and down and left and right while the bracket is coupled. .

This coupling means is only one embodiment, and the same result can be obtained by installing an elastic deformation material such as rubber or any mechanism capable of such deformation between the bracket 310 or the elbow gear bushing 320 and the mounting plate 330. have.

The panel unit 300 described above is mounted on the parking stand 24 of the ground transformer 1, and then the elbow connecting member 30, the elbow insulating cover 100, and the cover fixing frame 200 which are integrally coupled are ground. Disconnect from transformer (1).

To this end, the main frame 400 is moved to the ground transformer 1 to connect the connection plate 410 of the main frame 400 with the cover fixing plate 200. As described above, in the present embodiment, the external connection means of the fixed plate 200 is the second through hole 204 for external connection, and the second through hole 204 and the connection plate 410 for external connection are screwed. Although it is disclosed that the connection, the fixed plate 200 and the connection plate 410 is only to be detachably connected through any known connecting means.

FIG. 17 is a perspective view illustrating a connection relationship between the main frame 400 and the ground transformer 1.

The main frame 400 is composed of a subframe 460 and the transfer unit 470, the subframe 460 is composed of a connecting plate 410, the withdrawal rod 420, guide rod 430, cylinder 440 In the following, connection relations between components of the subframe 460 will be described.

One end of the lead bar 420 and the guide rod 430 is connected to the connection plate 410, and the other end of the lead rod 420 is connected to the cylinder 440. Although FIG. 17 discloses separately installing the transmission mechanism 450 using the principle of the lever to connect the other end of the lead rod 420 to the cylinder 440, the lead rod 420 is an elbow connecting member 30. Since it is only necessary to withdraw the rear, it is also possible to connect directly without such a transmission mechanism, the connection relationship between the withdrawal rod 420 and the cylinder 440 includes both directly connected or indirectly connected through the transmission mechanism. .

The other side of the guide rod 430 is inserted into the subframe 460 having a through hole for guiding the guide rod 430 to serve to guide the elbow connecting member 30 to be drawn out backward.

The subframe 460 as described above may be moved back and forth, left and right, and up and down by the transfer unit 470. In this embodiment, the conveying unit 470 is disclosed that the handle and the feed shaft, etc., but may be used any known conveying means.

The main frame 400 as described above is also preferably fixed to the ground transformer 1 by the fastening portion 490, in this case it can prevent the main frame is moved by the inertial force according to the operation of the cylinder. . However, as shown in the embodiment, the upper and lower conveyance parts are in contact with the ground, and the fixing fastening part may be eliminated by the weight of the elbow connector separating device. However, when the ground on which the elbow connecting material separating device is installed is slippery, it is desirable to have it. will be.

FIG. 18 schematically illustrates an operation relationship of the elbow connector separating apparatus. The elbow connecting member 30 is removed from the bushing 22 by a drawing rod 420 connected to the cylinder 440, and then the panel unit 300. By inserting into the elbow beech bushing 320, the elbow connecting member is separated from the ground transformer.

Hereinafter, an uninterruptible method using the elbow connector separating apparatus of the present invention will be described.

19 to 32 are views of a second underground device connected to an underground ship that is transmitted in a loop form and having a repair / replacement target, and a first underground device having a line connected to a second underground device located at one side of the second underground device; And an uninterruptible construction method for an underground ship including a third underground device located on the other side of the second underground device and having a line connected to the second underground device, wherein all of the first to third underground devices are grounded. The case of a transformer has been described, and the names of the first to third underground equipments are mixed with the first to third ground transformers.

19 shows the arrangement of the first to third ground transformers, and each ground transformer converts the high voltage electricity transmitted in a loop form by the high voltage cable to the low pressure to supply to each customer. When the second ground transformer 1200 is to be repaired or replaced among the ground transformers connected as described above, as shown in FIG. 20, the elbow connecting member is inserted into the elbow connecting member inserted from the second ground transformer side bushing of the first ground transformer 1100. The separation device is connected. (Step 1) Elbow connection material The elbow connection material connected to the separation device is removed from the bushing of the ground transformer as shown in FIG. 20 and mounted on the elbow coupling bushing 320 of the panel unit 300. 2) At this time, since the loop is transmitted, the high voltage cable 1400 connecting the first ground transformer 1100 and the second ground transformer 1200 is in a live state.

Next, as shown in FIG. 21, an elbow connector separating device is installed in the second ground transformer (step 3) and connected to the high voltage cable 1400 connecting the first ground transformer 1100 and the second ground transformer 1200. The elbow connector is separated from the second ground transformer 1200 (step 4). At this time, since the electric power is transmitted from the third ground transformer 1300 to the second ground transformer 1200, the low voltage electricity continues to be received. It is supplied.

Thereafter, as shown in FIG. 22, the construction transformer 1500 and the first ground transformer 1100 are connected. (Step A) This connection is made by a cable 1500 having elbow connecting members at both sides. First, the cable 1500 is connected to the high voltage side terminal 880 of the construction transformer 800 and then connected to the bushing of the first ground transformer 1100 to be safely connected. As shown in FIG. 23, the cable 1600 of the low voltage terminal 890 of the construction transformer 800 is connected to the cable 1620 connected to the low voltage terminal of the second ground transformer by a clamp (step B). The cable 1620 connected to the low voltage terminal of the ground transformer is for supplying electricity to the low voltage line of the consumer side, and in order to supply power to a plurality of consumers, an inlet distributor is installed in the low voltage terminal 890 of the transformer 800 for construction. Each cable can be installed in the inlet distributor and clamped to each customer low voltage line. Connecting the cable 1600 of the low voltage terminal 890 of the construction transformer 800 to the cable 1620 connected to the low voltage terminal of the second ground transformer by the clamp in step B includes being connected by an inlet distributor. .

As shown in FIG. 24, the cable 1600 of the low voltage terminal 890 of the construction transformer 800 connected by the clamp and the cable 1620 connected to the low voltage terminal of the second ground transformer are separated from the low voltage terminal of the second ground transformer. (Step C) Since the low voltage electricity transformed to low voltage is continuously supplied from the construction transformer 800, the power failure does not occur in the consumer.

Next, as shown in FIG. 25, an elbow connecting member separating device is installed in the third ground transformer (step 5) to separate the elbow connecting member from the second ground transformer side bushing. (Step 6) As a result, since no electricity is supplied to the cable 1420 from the third ground transformer, the supply of the high voltage electricity to the second ground transformer is stopped. After removing the elbow coupling member of the third ground transformer side of the second ground transformer as shown in FIG. 26 (step 7), the second ground transformer can be replaced or repaired (step 8).

After the repair or replacement of the second ground transformer is completed, connect the cable supplied to the customer to the low voltage terminal of the second ground transformer as shown in Figure 27 (step D), and the third ground transformer of the second ground transformer as shown in Figure 28 Insert the elbow connector into the side bushing. (Step 9) Next, as shown in FIG. 29, if the elbow connector is inserted into the second ground transformer side bushing of the third ground transformer (step 10), the high voltage electricity is supplied to the second ground transformer. The high voltage electricity transmitted is converted to low pressure by the second ground transformer and then supplied to the customer. Next, the cable of the construction transformer is removed from the first ground transformer and the second ground transformer as shown in FIG. 30 (step E), and the elbow connecting material of the second ground transformer is inserted into the first ground transformer side bushing as shown in FIG. (Step 11) As shown in Fig. 32, when the elbow connecting member is inserted into the second ground transformer side bushing of the first ground transformer (step 12), the work is completed uninterrupted.

The uninterruptible method of the present invention does not use only the elbow connecting material separating device of the present application, and any device capable of safely separating the elbow connecting material, such as the elbow connecting material separating device described in the applicant of the present application, of course can be used.

By using the elbow connector separating apparatus of the present invention, it is possible to safely remove the elbow connector from the bushing of the underground equipment without the risk of electric shock, etc. Also, if the uninterruptible method of the present invention is used, the underground equipment is uninterrupted with respect to the underground line. It becomes possible to repair or replace.

Claims (9)

An elbow fitting groove for inserting an elbow connecting member therein, and a fixing frame made of an insulating material, a connecting ring insertable into an operating ring of an elbow connecting member fitted to the elbow fitting groove, and a binding mechanism for adjusting the detachment of the connecting ring. A plurality of elbow insulating covers comprising a binding handle for tightly binding the elbow connecting member and the elbow fitting groove by operating the binding mechanism, and an assembling means for external connection; A cover fixing frame having a first through hole and external connecting means for fixing the plurality of elbow insulating covers, respectively; A drawing rod, a guide rod for preventing rotation of the drawing rod and guiding the drawing direction, a connection plate connected to the cover fixing frame by an external connection means of the cover fixing frame and connected to one end of the guide rod, and a drawing rod A subframe having a cylinder connected to the cylinder, and having a through hole for guiding the guide rod, wherein the cylinder is mounted; A main frame including a transfer unit for moving the subframes back, front, left, and down; A mounting plate, a bracket coupled to the parking stand of the ground transformer, and a bracket provided on the rear surface of the mounting plate, an elbow bent bushing attached to the front of the mounting plate to insert the withdrawn elbow connecting member, and the bracket or elbow bent bushing An elbow connection member separating apparatus comprising: a panel portion made of a coupling means capable of being movable up and down and left and right. The elbow connecting member separating apparatus of claim 1, wherein the main frame further comprises a fastening part which can be fixed to the ground transformer. The connection ring according to claim 1 or 2, wherein the binding mechanism is coupled to a first binding fastening hole processed at a position away from the rotation axis of the connecting ring and a second binding fastening hole processed at the tip of the binding adjustment screw. Elbow connection member separation device, characterized in that consisting of the connecting rod 123 for connecting the adjustment screw for binding. The elbow connecting member separating apparatus according to claim 1 or 2, wherein the assembling means for external connection is made of a fixing handle having a screw portion coupled to a binding adjustment screw projecting outward. The elbow connecting member separating apparatus according to claim 1 or 2, wherein the external connection means is a second through hole for external connection. The method of claim 1 or 2, wherein the coupling means is such that the bracket is coupled to the mounting plate by a bolt passing through the through hole and the diameter of the through hole is smaller than the head diameter of the bolt and larger than the thread diameter of the bolt. Or an elbow connecting member separating device which is made by installing an elastic deformation material such as rubber between a bracket or an elbow gear bushing and a mounting plate. A second underground device, which is connected to the underground line that is transmitted in a loop, and is a ground transformer for repair / replacement, and a first underground device which is located on one side of the second underground device and has a line connected to the second underground device; In the uninterruptible construction method for the underground ship comprising a third underground equipment, which is located on the other side of the second underground equipment and a ground transformer having a line connected to the second underground equipment, A connection step (step 1) of the first underground apparatus and the elbow connecting member separating apparatus connecting the elbow connecting member and the elbow connecting member separating apparatus fitted to the second underground equipment side bushing of the first underground equipment; An elbow connecting member separating step (step 2) of removing the elbow connecting member of the first underground equipment from the bushing using the elbow connecting member separating device connected to the first underground equipment (step 2); A connection step (step 3) of the second underground equipment and the elbow connecting material separating device for connecting the elbow connecting material and the elbow connecting material separating device fitted to the first underground equipment side bushing of the second underground equipment; An elbow connecting member separating step (step 4) of the second underground equipment for removing the elbow connecting member of the second underground equipment from the bushing using an elbow connecting member separating device connected to the second underground equipment; Inserting the elbow connecting member of the construction transformer into the bushing side bushing of the first underground machine (step A); A low pressure cable connection step (step B) of connecting a low voltage cable connected to the low voltage terminal of the second underground machine and a cable connected to the low voltage terminal of the construction transformer by a clamp; A low voltage cable separating step (step C) of separating the low voltage cable connected by the cable of the inlet distributor of the construction transformer and the clamp from the low voltage terminal of the second underground machine; A connection step (step 5) of the third underground device and the elbow connecting material separating device for connecting the elbow connecting material and the elbow connecting material separating device fitted to the second underground equipment side bushing of the third underground equipment; An elbow connecting member separating step (step 6) of removing the elbow connecting member of the third underground equipment from the bushing using the elbow connecting member separating device connected to the third underground equipment (step 6); Separating the elbow connecting member of the third underground equipment side of the second underground equipment (step 7); Repairing or replacing the second underground machine (step 8); A low voltage cable connecting step (step D) of connecting a low voltage cable separated in the low voltage cable separating step to a low voltage terminal of a second underground machine; An elbow connecting step (step 9) of the second underground equipment, which inserts an elbow connecting material into the third underground equipment side bushing of the second underground equipment; An elbow connecting step (step 10) of the third underground device, wherein the elbow connecting material is inserted into the second underground device side bushing of the third underground device; A construction transformer removing step of removing the cable of the construction transformer from the first underground equipment and the second underground equipment (step E); An elbow connecting step (step 11) of the second underground equipment, which inserts the elbow connecting material of the second underground equipment into the first underground equipment side bushing; And an elbow connection step (step 12) of the first underground device, wherein the elbow connection material is inserted into the second underground device side bushing of the first underground device. A second underground device connected to the underground line that is transmitted in a loop shape and a ground transformer to be repaired / replaced; In the uninterruptible construction method for an underground ship comprising a third underground equipment, which is located on the other side of the second underground equipment and a ground breaker having a line connected to the second underground equipment, A connection step (step 1) of the first underground apparatus and the elbow connecting member separating apparatus connecting the elbow connecting member and the elbow connecting member separating apparatus fitted to the second underground equipment side bushing of the first underground equipment; An elbow connecting member separating step (step 2) of removing the elbow connecting member of the first underground equipment from the bushing using the elbow connecting member separating device connected to the first underground equipment (step 2); A connection step (step 3) of the second underground equipment and the elbow connecting material separating device for connecting the elbow connecting material and the elbow connecting material separating device fitted to the first underground equipment side bushing of the second underground equipment; An elbow connecting member separating step (step 4) of the second underground equipment for removing the elbow connecting member of the second underground equipment from the bushing using an elbow connecting member separating device connected to the second underground equipment; Inserting the elbow connecting member of the construction transformer into the bushing side bushing of the first underground machine (step A); A low pressure cable connection step (step B) of connecting a low voltage cable connected to the low voltage terminal of the second underground machine and a cable connected to the low voltage terminal of the construction transformer by a clamp; A low voltage cable separating step (step C) of separating the low voltage cable connected by the cable of the inlet distributor of the construction transformer and the clamp from the low voltage terminal of the second underground machine; Shutting off the switch of the third underground machine (step 6-1); Separating the elbow connecting member of the third underground equipment side of the second underground equipment (step 7); Repairing or replacing the second underground machine (step 8); A low voltage cable connecting step (step D) of connecting a low voltage cable separated in the low voltage cable separating step to a low voltage terminal of a second underground machine; An elbow connecting step (step 9) of the second underground equipment, which inserts an elbow connecting material into the third underground equipment side bushing of the second underground equipment; Connecting a switch of the third underground device (step 10-1); A construction transformer removing step of removing the cable of the construction transformer from the first underground equipment and the second underground equipment (step E); An elbow connecting step (step 11) of the second underground equipment, which inserts the elbow connecting material of the second underground equipment into the first underground equipment side bushing; And an elbow connection step (step 12) of the first underground device, wherein the elbow connection material is inserted into the second underground device side bushing of the first underground device. A second underground device, which is connected to the underground line that is transmitted in a loop, and is a ground breaker that is subject to repair / replacement; In the uninterruptible construction method for the underground ship comprising a third underground equipment, which is located on the other side of the second underground equipment and a ground transformer having a line connected to the second underground equipment, A connection step (step 1) of the first underground apparatus and the elbow connecting member separating apparatus connecting the elbow connecting member and the elbow connecting member separating apparatus fitted to the second underground equipment side bushing of the first underground equipment; An elbow connecting member separating step (step 2) of removing the elbow connecting member of the first underground equipment from the bushing using the elbow connecting member separating device connected to the first underground equipment (step 2); A connection step (step 3) of the second underground equipment and the elbow connecting material separating device for connecting the elbow connecting material and the elbow connecting material separating device fitted to the first underground equipment side bushing of the second underground equipment; An elbow connecting member separating step (step 4) of the second underground equipment for removing the elbow connecting member of the second underground equipment from the bushing using an elbow connecting member separating device connected to the second underground equipment; A connection step (step 5) of the third underground device and the elbow connecting material separating device for connecting the elbow connecting material and the elbow connecting material separating device fitted to the second underground equipment side bushing of the third underground equipment; An elbow connecting member separating step (step 6) of removing the elbow connecting member of the third underground equipment from the bushing using the elbow connecting member separating device connected to the third underground equipment (step 6); Separating the elbow connecting member of the third underground equipment side of the second underground equipment (step 7); Repairing or replacing the second underground machine (step 8); An elbow connecting step (step 9) of the second underground equipment, which inserts an elbow connecting material into the third underground equipment side bushing of the second underground equipment; An elbow connecting step (step 10) of the third underground device, wherein the elbow connecting material is inserted into the second underground device side bushing of the third underground device; An elbow connecting step (step 11) of the second underground equipment, which inserts the elbow connecting material of the second underground equipment into the first underground equipment side bushing; And an elbow connection step (step 12) of the first underground device, wherein the elbow connection material is inserted into the second underground device side bushing of the first underground device.

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