KR101709618B1 - Dummy Plug for No-Load Energizing Test - Google Patents

Abstract

The present invention relates to a dummy plug used to temporarily block contact with the outside for preventing hazard due to charging current when a no-load energizing test is performed by receiving power from another power supply device before a transformer, a circuit breaker, a device receiving power or a power service cable is connected to a connection terminal system of a power cable to send electricity. According to the present invention, the dummy plug comprises: an insulation part made by an insulation material which blocks current of a certain magnitude and having one end inserted into an insulation bushing part of a bushing part to prevent a risk of external leakage of charging current flowing in the connection terminal system and to prevent contact with the outside; and a finishing cap part fixing the insulation part by inserting the other end of the insulation part and coupled with the insulation bushing part to prevent the insulation part from being exposed to the outside, wherein the insulation part includes a terminal cylinder part; a cone part which plugs the insulation bushing part; and a cap connection cylinder part of a cylindrical shape, coupled with the finishing cap part. The finishing cap part includes a bushing part connection cap part to be coupled with the insulation bushing part; and a cylindrical insulation part insertion cap part having the cap connection cylinder part inserted therein to be coupled with the same, and having a bottom. According to the present invention, the dummy plug for a no-load energizing test enables a safe test by prevention a risk caused by charging current during a no-load energizing test.

Description

[0001] The present invention relates to a dummy plug for no-

The present invention relates to a dummy plug for a no-load pressure test, and more particularly, to a dummy plug for a no-load pressure test, more particularly, To a dummy plug for a no-load pressurization test, which is connected to the bushing portion in place of the contact portion in the connection terminal system of the power supply cable to temporarily stop the contact with the outside.

Before applying the ground power cable from the main transformer or circuit breaker, or from the main transformer or circuit breaker, or from the other power supply before connecting to the power supply cable, If the connection terminal system (A) is left open, the charging current (Charging Current) may cause a danger due to the charging current. To prevent this, a protection device for preventing contact with the outside is required.

The charging current refers to the current flowing when a voltage is applied to a capacitor or a capacitance occurs between a wire and an electric wire, a wire, and a ground on a transmission line.

As shown in Figs. 1 and 2, the connection terminal system A is formed in a main transformer, a circuit breaker, a device to which power is supplied, or a power cable terminal on the power supply cable side, A bushing A1 made of a bushing A12; A chamber A2 for covering the outside of the bushing A1 to protect the bushing A1 and prevent water from penetrating and fixing the bushing A1; A mail contact part A31 formed in the terminal of the power supply side power cable and inserted into the female contact part A11 of the bushing A1 and a conductor connected to the mail contact part A31 And a housing part (A33) having a connection part (A331) for connection between the bushing part (A1) and a conductor and a lead-in cable, the insulation contact part (A32) And a contact portion A3.

The state in which the connection terminal system A of the power cable is opened in the no-load pressurization test is a state in which the contact portion A3 is not connected to the bushing A1. Instead of the contact portion A3, A protective device for blocking the bushing A1 is required.

This protection device is a dummy plug (B) of the present invention which serves as a finishing cap before engaging the contact portion (A3).

The three-phase power supply shall be a dead-end cap for power supply terminals of phase 1 and the no-load pressure test shall be carried out with three dummy plugs (B) connected.

When the no-load pressurization test is completed, the dummy plug (B) of the present invention is unscrewed and disassembled, and the main transformer, the breaker or the power supply unit or the power supply cable plays a magnetic role by connecting the contact portion A3 thereto do.

1. Korean Patent Laid-Open No. 10-2012-0106570 (Disclosure date: September 26, 2012) Dummy plugs and connectors 2. Korean Registered Patent No. 10-1009640 (Registered Date: January 13, 2011) Dummy plug for diesel engine 3. Korean Patent Registration No. 10-0780896 (Registration date: November 23, 2007) Wiring connector for heavy equipment for construction heavy equipment Dummy plug

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to prevent the risk of charging current when a main transformer or a circuit breaker is subjected to no- And a finishing cap portion for preventing the insulating portion and the insulating portion from being exposed to the outside.

The dummy plug of the present invention is connected to a connection terminal system of a power cable from a transformer or a circuit breaker or a power supply unit or a power supply cable and is supplied with power from another power supply unit before power supply. Used to prevent danger by; A bushing portion formed in a main transformer or a circuit breaker or a device to which power is supplied or a power cable terminal on the power inlet cable side and having a female contact portion and an insulating bushing portion and a bushing portion surrounding the bushing portion to protect the bushing portion, And a mail contact part formed in the terminal of the power supply side power cable and inserted into the contact part of the bushing part. The conductor and the conductor are in contact with each other, The contact portion is connected to the bushing portion in place of the contact portion to block the insulation bushing portion to temporarily prevent contact with the outside.

The dummy plug is made of an insulating material that cuts off a current of a predetermined magnitude and one end is inserted into the insulating bushing portion of the bushing portion to prevent the leakage of the charging current flowing to the connection terminal system, An insulating portion to be formed; The other end of the insulation part is inserted and fixed to fix the insulation part and is coupled with the insulation bushing part to prevent the insulation part from being exposed to the outside.

Wherein the insulating portion has a cylindrical terminal cylindrical portion inserted into the female contact part portion; A cone portion connected to the terminal cylindrical portion and plugging the insulated bushing portion in a conical column shape having the same inclination as that of the insulated bushing portion; And a cylindrical cap coupling cylinder formed continuously to the cone portion and partially inserted into the finishing cap portion and coupled to the finishing cap portion with a plurality of tongue bolts.

Wherein the finishing cap portion is a bottomed cylindrical shape having a predetermined depth and a predetermined diameter and a hollow through which the cap coupling cylinder can pass, the bushing portion coupling cap portion for coupling with the insulating bushing portion; And a cap inserting cap portion formed continuously from the hollow outside of the bushing portion engaging cap portion and inserted into the cap engaging cylindrical portion and having a bottom and a cylindrical shape.

A terminal-cylindrical circular groove having a cylindrical shape into which a conductor terminal can be inserted is formed up to a certain depth of the terminal cylindrical portion and the conical portion.

A cap coupling cylinder circular groove formed at the center of the cap coupling cylinder to a predetermined depth for saving the material and reducing the weight during the handing operation and a plurality of tongue bolts which do not protrude from the outer surface of the finishing cap portion, A metal ring insertion groove is formed to increase the coupling force with the finishing cap portion when the finishing cap portion and the insulation portion are engaged.

The metal ring insertion groove is inserted with a two-piece metal ring for transmitting the elasticity of the insulation part to the tongue bolt according to the depth of the joint when the insulation part and the finishing cap part are coupled with the tongue bolt.

The bushing portion coupling cap portion is provided with a cap packing for preventing moisture from penetrating into the insulating bushing portion when the bushing portion coupling cap is coupled with the bushing portion, and a plurality of bushing portions An engaging bolt insertion hole is formed.

The insulator insert cap portion is formed with a plurality of tongue-and-bolt insertion holes having tabs formed therein for screwing with the tongue-and-bolts.

The above-described dummy plug can solve the problem to be solved by the present invention.

According to the dummy plug for no-load pressure test of the present invention, there is an effect that a risk of charging current can be prevented during a no-load pressure test, and a safe test can be performed.

Figure 1 shows the coupling of a connection terminal system used to supply power to a transformer or breaker in an underground cable, or to supply power to a different power supply or power cable from a transformer or breaker.
Figure 2 shows an exploded view of the connection terminal system
3 is an overall schematic view of a dummy plug for no-load pressure test
Fig. 4 is an overall perspective view of a dummy plug for no-
5 is a front view of the dummy plug for no-load pressurization test according to the present invention, which is coupled to a bushing portion coupled with a chamber portion in a connection terminal system
6 is a schematic view of an insulation part according to a dummy plug for no-
7 is a schematic view of a finishing cap portion according to a dummy plug for no-
8 is a schematic view of the cap packing of the finishing cap portion according to the dummy plug for no-

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

Further, the terms described below are defined in consideration of the functions of the present invention, and this may vary depending on the intention or custom of the user, the operator, and the like, and therefore the definition is not limited to the " dummy plug for no- It should be based on the contents throughout the specification.

Hereinafter, a preferred embodiment of the "no-load pressure test dummy plug" according to the present invention will be described in detail.

The following examples are merely illustrative of the present invention and are not intended to limit the scope of the present invention.

FIG. 1 is a coupling diagram of a connection terminal system used to supply power to a transformer or a breaker in an underground cable, or to supply power to another power supply or a power cable from a transformer or a breaker. FIG. 4 is a perspective view showing a dummy plug for no-load pressurization test according to the present invention, FIG. 5 is a cross-sectional view of a dummy plug for a no-load pressurization test, 6 is a schematic view of an insulation part according to a dummy plug for no-load pressurization test, Fig. 7 is a schematic view of a finishing cap part according to a dummy plug for no-load pressurization test, Fig. 8 is a schematic view of a finishing cap Fig.

The dummy plug (B) of the present invention is connected to a connection terminal system of a power cable from a main transformer or a circuit breaker or a power supply unit or a power supply cable, and is supplied with power from another power supply unit It is used to prevent the danger caused by the charging current.

1 and 2, the connection terminal system A is formed in a main transformer, a circuit breaker, a device to which power is supplied, or a power cable terminal on the power inlet cable side, A bushing A1 made of a bushing A12; A chamber A2 for covering the outside of the bushing A1 to protect the bushing A1 and preventing water from penetrating and fixing the bushing A1; A mail contact part A31 formed in the terminal of the power supply side power cable and inserted into the female contact part A11 of the bushing A1 and a conductor connected to the mail contact part A31 And a housing part (A33) having a connection part (A331) for connection between the bushing part (A1) and a conductor and a lead-in cable, the insulation contact part (A32) And a contact portion A3.

The dummy plug B of the present invention is coupled to the bushing A1 in place of the contact A3 in the connection terminal system A of the power cable to temporarily block the outside of the insulated bushing A12 To prevent the risk of charging current.

As shown in FIGS. 3 and 4, the dummy plug B is made of an insulating material that cuts off current of a predetermined size, and one end thereof is inserted into the insulating bushing A12 of the bushing A1, An insulating part (1) for preventing the risk of leakage of the charging current flowing to the terminal system (A) to the outside and for preventing contact with the outside; A finishing cap part 2 for fixing the insulating part 1 and fixing the other end of the insulating part 1 to prevent the insulating part 1 from being exposed to the outside by being engaged with the insulating bushing part A12, .

5 is a front view of the dummy plug B coupled to the bushing A1 connected to the chamber A2 in the connection terminal system A. The dummy plug B is connected to the insulated bushing A12 ) To prevent temporary contact with the outside, thereby preventing danger due to the charging current.

6, the insulating part 1 is made of an insulating material that cuts off a current of a predetermined size and is inserted into the insulating bushing A12 of the bushing part A1 at one end thereof, A) is prevented from leaking to the outside and serves to prevent contact with the outside.

The insulating part 1 is preferably made of a silicon rubber having a heat resistant property at a predetermined temperature and an insulating property for cutting off a current of a certain magnitude.

The insulating portion 1 includes a cylindrical terminal portion 11 inserted into the female contact portion A11, A cone portion 12 connected to the terminal cylindrical portion 11 and plugging the insulating bushing A12 in a conical column shape having the same inclination as the insulating bushing portion A12; And a cylindrical cap coupling cylinder 13 which is connected to the cone portion 12 and is partially inserted into the finishing cap portion 2 to be coupled with the finishing cap portion 2 by a plurality of tongue bolts 222 .

The terminal cylindrical portion circular groove 111 is formed to a certain depth of the terminal cylindrical portion 11 and the conical portion 12 so that a terminal made of a conductive material can be inserted therein if necessary.

A cap engaging cylindrical circular groove 131 formed at the center of the cap engaging cylindrical portion 13 to a predetermined depth for saving material and reducing the weight during handing; A metal ring insertion groove 132 is formed to increase the coupling force with the finishing cap part 2 when the finishing cap part 2 and the insulating part 1 are coupled by tightening with the plurality of tongue bolts 222 having no bolt head .

The metal ring insertion groove 132 is formed in the metal ring insertion groove 132 so that the elasticity of the insulation part 1 according to the depth of the coupling when the insulation part 1 and the finishing cap part 2 are coupled by the tongue- The two separate metal rings 133 are inserted.

The metal ring 133 is made of stainless steel or aluminum having a certain strength and is not rusted. The metal ring 133 is divided into two pieces, so that a cutout 1331 is formed.

7, the finishing cap part 2 is formed by inserting and fixing the other end of the insulating part 1 to fix the insulating part 1 and to be coupled with the insulating bushing part A12, 1 from being exposed to the outside.

The finishing cap part 2 is preferably made of a material such as aluminum or stainless steel which does not rust and does not allow electricity to flow.

The finishing cap part 2 has a cylindrical shape with a predetermined depth and a predetermined diameter and a bottom formed with a hollow through which the cap coupling cylindrical part 13 can pass, and a coupling with the insulating bushing part A12 (21); And a cap inserting cap portion 22 which is formed continuously on the outside of the hollow portion of the bushing portion engaging cap portion 21 and inserted into the cap engaging cylindrical portion 13 and has a bottom and a cylindrical shape.

A cap packing 211 for preventing moisture from penetrating into the insulated bushing A12 when the bushing A1 is coupled with the bushing A1 is provided on the bushing A1, And a plurality of bushing unit engaging bolt insertion holes 212 for bolt-engaging with the bushing engaging bolts 213 are formed.

A plurality of tongue-and-bolt insertion holes 221 having tabs 2211 formed therein for screwing with the tongue bolts 222 are formed in the insulator insertion cap portion 22.

The tongue bolt (222) is made of stainless steel so as not to rust on the outer surface of the finishing cap part (2) with a bolt without a bolt head.

8, in order to prevent moisture from penetrating into the insulated bushing A12 when the bushing A1 is coupled with the bushing A1, And serves to seal the contact portion of the coupling cap portion 21 and uses an insulating material.

The cap packing 211 may be further provided with a soft packing to seal the contact portion between the bushing A1 and the bushing portion.

The cap packing 211 is provided with a ring-shaped projection 2111 for entering the inner surface of the insulating bushing A12 and a bushing portion 2111 for bolt connection with the insulating bushing A12 and the bushing coupling bolt 213. [ A bolt through-hole 2112 is formed.

The cap packing 211 has a hexagonal shape and a circular protrusion 2111 is formed therein.

According to the dummy plug for no-load pressure test of the present invention, there is an effect that a risk of charging current can be prevented during a no-load pressure test, and a safe test can be performed.

A: Connection terminal system A1: Bushing part
A11: Female contact part part A12: Insulating bush part
A2: chamber part A3: contact part
A31: Mail contact part part A32: Insulation contact part
A33: Housing part A331:
B: Dummy plug
1: insulation part 11: terminal cylinder part
111: terminal cylinder circular groove 12:
13: cap engaging cylindrical portion 131: cap engaging cylindrical portion circular groove
132: metal ring insertion groove 133: metal ring
1331: incision
2: finish cap part 21: bushing part engagement cap part
211: cap packing 2111:
2112: bushing portion coupling bolt through hole 212: bushing portion coupling bolt insertion hole
213: bushing portion coupling bolt 22: insulated portion inserting cap portion
221: tongue bolt insertion hole 2211: tab
222: Tongue bolts

Claims (3)

If the main transformer or circuit breaker or power supply cable is connected to the connection terminal system (A) of the power supply cable from the power supply cable, power is supplied from another power supply before energization. Lt; / RTI > A bushing portion A1 formed on the main transformer or the circuit breaker or the power supply terminal or the power supply cable side power cable terminal and composed of the female contact part A11 and the insulating bushing A12; (A2) for protecting the bushing (A1) and preventing water from penetrating and fixing the bushing (A1), a power supply side power cable And a contact portion A3 including a mail contact part A31 inserted into the mail contact part A11 of the part A1 and making contact between the conductor and the conductor so as to energize the power source, A dummy plug (B) coupled to the bushing (A1) in place of the contact portion (A3) in the terminal system (A) to block the insulation bushing (A12)
The dummy plug B is made of an insulating material that cuts off a current of a predetermined size and one end of the dummy plug B is inserted into the insulating bushing A12 of the bushing A1, (1) for preventing the risk of leaking to the outside and for blocking contact with the outside;
A finishing cap part 2 for fixing the insulating part 1 and fixing the other end of the insulating part 1 to prevent the insulating part 1 from being exposed to the outside by being engaged with the insulating bushing part A12, Lt; / RTI >
The insulating portion 1 includes a cylindrical terminal portion 11 to be inserted into the female contact portion A11;
A cone portion 12 connected to the terminal cylindrical portion 11 and plugging the insulating bushing A12 in a conical column shape having the same inclination as the insulating bushing portion A12;
And a cylindrical cap coupling cylinder part 13 formed in a continuous connection with the cone part 12 and partially inserted into the finishing cap part 2 to be coupled with the finishing cap part 2 by a plurality of tongue bolts 222 ,
The finishing cap part 2 has a cylindrical shape with a predetermined depth and a predetermined diameter and a center hole through which the cap coupling cylindrical part 13 can pass, (21);
A cap inserting cap portion 22 which is formed continuously from the hollow outside of the bushing portion inserting cap portion 21 and inserted into the cap inserting cylindrical portion 13 and has a bottom and a cylindrical shape,
A cylindrical terminal circular portion 111 is formed at a predetermined depth of the terminal cylindrical portion 11 and the conical portion 12,
A cap engaging cylindrical circular groove 131 formed at the center of the cap engaging cylindrical portion 13 to a predetermined depth for saving material and reducing the weight during handing; A metal ring insertion groove 132 is formed to increase the coupling force with the finishing cap part 2 when the finishing cap part 2 and the insulating part 1 are coupled by tightening with the plurality of tongue bolts 222 having no bolt head Lt; / RTI &
The metal ring insertion groove 132 is formed in the metal ring insertion groove 132 so that the elasticity of the insulation part 1 according to the depth of the coupling when the insulation part 1 and the finishing cap part 2 are coupled by the tongue- The two separate metal rings 133 are inserted,
A cap packing 211 for preventing moisture from penetrating into the insulated bushing A12 when the bushing A1 is coupled with the bushing A1 is provided on the bushing A1, And a plurality of bushing portion coupling bolt insertion holes 212 for bolt connection are formed by bushing coupling bolts 213,
Wherein a plurality of tongue bolt insertion holes 221 having tabs 2211 formed therein for threaded engagement with the tongue bolts 222 are formed in the insulator insertion cap portion 22.
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