KR200364802Y1 - Auto section switch - Google Patents

Abstract

The present invention exhibits the required closing and opening speed due to the configuration of the O-ring in the movable part, and improves the operation characteristics. The insulation strength is improved by the rectifying member and the shield which are configured to be adjacent to the tulip contact. The present invention relates to a current transformer combined indoor failure zone automatic switch for easy replacement when the parts are damaged by assembling separately.

The above invention is

A circular hermetic current transformer formed at an upper portion thereof to detect a transient failure and an overload current on the load side;

A current inlet terminal for current input, the current transformer being configured to be electrically connected downwardly through the central portion of the current transformer support insulator;

A support part for fastening and fixing part support under the current transformer support insulator including the insert;

An insulating member for integrally forming the current transformer, the current transformer support insulator central portion and the lower portion;

Adjacent to the current transformer is characterized in that it is configured to form a fixed part by having a fixed electrode, a shield ring, a bracket, a dustproof rubber, a bus bar and a lock nut.

Description

Current switch combination type indoor failure section automatic switch {Auto section switch}

The present invention relates to a current transformer combined indoor failure section automatic switchgear used in a 22.9kV-Y switchgear. Specifically, the operation characteristics are improved by exhibiting the required closing and opening speed due to the configuration of the O-ring in the movable part. Current transformer combination type indoor failure zone automatic switchgear for easy replacement in case of parts damage by assembling and combining a separate support insulator and a current transformer while improving insulation strength by shield and rectifying member of tulip contact point. .

Generally, in order to prevent accidents caused by inflow of fault and overload current in the 22.9kV-Y distribution line or breakdown in the household, the circuit breaker (CB) on the power side and the breaker automatic switch on the customer side cooperate with the recloser to perform the function. Doing.

Conventionally, in case of automatic switchgear of breakdown section, inflow type using insulation oil as a medium for extinguishing the inside and outside of the area has been widely used. However, due to the trouble of maintenance such as fire and explosion risk, leakage and insulation oil or occasional inspection, In the case of facilities, most of them are air-insulated type, and the support insulator has been replaced by polymer insulators in magnetic materials, which not only reduced the weight but also reduced the appearance and size of the current transformer assembly. After inserting into the support insulator, the method of forming a polymer insulator reduced the area occupied by the equipment by more than 50%.

However, in the case of the failure section automatic switchgear configured as described above, the production process of the support insulator formed by embedding the current transformer assembly is complicated and difficult, and the productivity is low, and only the failure part can be replaced when the support insulator breaks or the current transformer breaks down. There was a problem that the entire support insulator had to be replaced despite the partial failure.

1 shows the configuration of a current transformer integrated support insulator according to Utility Model Registration No. 20-0262676 (Insulator for High Voltage Electrical Equipment),

The current transformer integrated support insulator 200 forms a circular hermetic current transformer 210 in the upper upper end,

The bus bar 220 having a “c” shape penetrating the center of the current transformer 210 was formed to be fixed to the upper end of the current transformer integrated support insulator 200.

One side of the bus bar 220 constitutes a bus bar 230 for drawing or drawing a load current while the other side of the bus bar 220 includes a movable electrode 240 constituting a extinguishing portion for extinguishing a fault and an overload current.

The current transformer 210 and the bus bar 220 are molded by using an insulating member 250 made of an epoxy polymer.

Current transformer-integrated support insulator according to the conventional configuration has a limitation of the application suitable for performing the role of the support insulator rather than the role of the conventional current transformer to configure the movable portion of the automatic switch by supporting the movable electrode 240.

In addition, when the bending vibration characteristics of the cantilever are not considered in the operation of the movable electrode 240, not only the permanent dynamic stability is maintained but also the continuation of the permanent bending of the movable electrode 240 and the automatic switchgear. In consideration of the deterioration of the insulating member 250 due to the dielectric polarization due to the three-phase design should be sufficiently spaced apart the insulation distance between phases, the overall size is increased, the bus bar 220 due to the repeated opening and closing operation of the automatic switch Locally formed cracks at the molded boundary of the c) causes continuous partial discharge, which eventually promotes deterioration of the insulating member 250 and thus fails to achieve the required lifespan. there was.

This should be accompanied by optimized design considering inventory and physical characteristics of the inefficiency of the purpose of use, and there are broadly tangible and intangible problems as well as the connection with life.

That is, the tangible problem is that the installation, repair and replacement work by increasing the weight of the automatic switchgear due to the use of excessive insulation member 250 by forming the current transformer 210 integrally in the current transformer integrated support insulator 200 integrally It is not easy, and the safety of workers can be seriously threatened, and the design considering the insulation distance between phases increases the installation area more than necessary in the switchgear, making it difficult to install in a compact packaged switchgear. When the replacement caused by a problem such as burnout of the current transformer 210, including the 240, there was a problem that must be replaced, including the movable electrode (240).

In addition, the intangible problem is that the increase of the production cost due to the above reasons and the handling and transport of the workers during the manufacturing is not easy, excessive work time is required, additional costs and various replacement costs for the user There was a problem such as that required.

The present invention is devised to solve the conventional problems as described above, the present invention is devised to solve the problems as described above,

As a reliable current transformer, the permanent role is played, the transformer support insulator shows permanent dynamic stability, the joint sharing of the fixed part support insulator and the opening / closing shock, the efficient and optimal distribution, the ease of handling and transport of the process work and the finished product, and the low production cost. Compact structure by reducing the cost of replacement, detachable structure that can be used as a switchgear with simple load switching performance, and additional structure installation cost by minimizing the charging part exposure due to solid fixed installation on one side of support insulator support It is an object of the present invention to provide a current transformer combined indoor failure section automatic switchgear that enables the insulation distance suitable for a packaged switchgear.

Current transformer combination type indoor failure section automatic switch installed in the switchgear of the present invention for achieving the above object is to be built in the current transformer support insulator to detect fault and overload current,

A circular hermetic current transformer assembly formed thereon to detect transient failures and overload currents on the load side;

An inlet terminal for inputting a primary power source to a current transformer assembly extending downwardly through a central portion of the current transformer support insulator to be electrically connected to the current transformer;

A support unit engaged with the frame under the current transformer support insulator;

A fixed electrode formed at a position in contact with the current transformer assembly to enable power supply to the secondary side;

A shield ring positioned outside the fixed electrode to mitigate an electric field;

A fixing part coupled to the current transformer assembly by a lock nut in a state in which a bracket for coupling the fixing part support insulator to a lower end is provided with a dustproof rubber;

A movable electrode selectively contacting a position in contact with the fixed electrode while reciprocating about a movable shaft;

A cylindrical sliding shaft in contact with the inner circumferential surface of the movable electrode to maintain electrical connection even during movement;

First and second tulip contacts elastically installed at both ends of the sliding shaft to form a plurality of connection pieces circumferentially by a contact spring;

A rectifying member and a shield fixed to an outer circumferential surface of the sliding shaft and configured to be adjacent to the second tulip contact point at the end of the housing reciprocating to improve the dielectric strength;

The inner surface of the housing is installed between the first tulip contact, characterized in that composed of an O-ring for improving the operating characteristics by exhibiting the required closing and opening speed.

1A, 1B and 1C are schematic diagrams showing the configuration of a conventional insulator for a high voltage electric apparatus.

Figure 2 is a cross-sectional view showing a state in which the automatic switch of the present invention is put.

Figure 3 is a cross-sectional view showing a state in which the automatic switch of the present invention is opened.

Figure 4 is a detailed view of the main part of the present invention.

Explanation of symbols on the main parts of the drawings

100: current transformer assembly 120: incoming terminal

140: fixed part 141: fixed electrode

142: shield ring 143: fixing part support insulator

150: movable electrode 152: sliding shaft

153 and 156: first and second tulip contacts

160: housing 162: rectifying member

163: O-ring

Hereinafter, with reference to the accompanying drawings illustrating a preferred embodiment of the present invention.

2 to 3 is a front view under the input and open state including the current transformer support insulator according to the present invention, Figure 4 is a cross-sectional view showing a part of the movable portion.

A circular hermetic current transformer assembly 100 formed thereon so as to detect transient failure and overload current on the load side;

An inlet terminal 120 for inputting primary power to a current transformer assembly 100 extending downward through a central portion of the current transformer support insulator 110 to be electrically connected to the current transformer;

A support part 131 for fastening with the frame 130 at the bottom of the current transformer support insulator 110;

A fixed electrode 141 formed at a position in contact with the current transformer assembly 100 to enable supply of power to the secondary side;

A shield ring 142 positioned outside the fixed electrode 141 to relax an electric field;

A fixing part 140 coupled to the current transformer assembly 100 by the lock nut 146 in a state in which the bracket 144 coupled to the fixing part supporting insulator 143 at the lower portion is provided with the anti-vibration rubber 145. ;

A movable electrode 150 selectively contacting with a position in contact with the fixed electrode 141 while reciprocating around the movable shaft 151;

An inner circumferential surface of the movable electrode 150 having a cylindrical sliding shaft 152 which is in contact with and maintains an electrical connection during movement;

First and second tulip contacts 153 and 156 elastically installed at both ends of the sliding shaft 152 to have a plurality of connecting pieces 154 and 157 circumferentially by the contact springs 155 and 158. )and;

It is fixed to the outer circumferential surface of the sliding shaft 152 by the snap ring 161 to be configured to be adjacent to the position in contact with the second tulip contact 156 at the end of the reciprocating housing 160 to improve the insulation strength A rectifying member 162 and a shield 172;

The inner surface of the housing 160 is provided between the first tulip contact 153 is configured as an O-ring 163 for improving the operating characteristics by exhibiting the required closing and opening speed.

Here, the current transformer assembly 100 and the current transformer support insulator 110 are integrally molded in a sealed state by an insulating member.

The current transformer combined indoor failure section automatic switch according to the present invention configured as described above moves the movable electrode 150 and the housing 160 in a reciprocating manner as the movable shaft 151 rotates by a control unit not shown in the drawing. As to connect or short-circuit 150 and the fixed electrode 141,

Power from the outside, which is input through the inlet terminal 120, detects a transient failure and an overload current on the load side via the sealed current transformer assembly 100.

The current transformer support insulator 110 supporting the current transformer assembly 100 is coupled to the lower frame 130 through the support 131.

Power is supplied through the inlet terminal 120 to the fixed electrode 141 of the fixed part 140 formed at the position in contact with the current transformer assembly 100 to enable supply to the secondary side.

The fixing part 140 is to relax the electric field by the shield ring 142 located outside the fixed electrode 141 while the current transformer assembly 100 through the bracket 144 and the anti-vibration rubber 145. At the same time to be securely coupled to the fixing portion support insulator 143 at the bottom.

The movable electrode 150 in contact with the fixed electrode 141 is selectively brought into contact with the fixed electrode 141 while being reciprocated by the movable shaft 151.

A cylindrical sliding shaft 152 is formed on the inner circumferential surface of the movable electrode 150 to maintain the electrical connection while moving.

First and second tulip contacts 153 and 156 are formed at both ends of the sliding shaft 152 so as to be circumferentially formed by the contact springs 155 and 158 of the plurality of connecting pieces 154 and 157. Resilient installation ensures stable opening or closing operation.

The rectifying member 162 and the shield 172 are in contact with the second tulip contact point 156 at the end of the housing 160 which is fixed to the outer circumferential surface of the sliding shaft 152 by the snap ring 161 and reciprocates together. It is configured to be adjacent to the insulation strength is improved to prevent the occurrence of entanglement due to uneven field concentration between the second tulip contact 156 and the fixed electrode 141 in the open state.

Between the first tulip contact point 153 on the inner surface of the housing 160, air intake by replacing the existing piston ring of PC or Teflon (PTFE) material with O-ring 163 of soft synthetic rubber material Compression and injection are optimally performed to achieve the required closing and opening speeds to improve operating characteristics.

What has been described above is just one embodiment for configuring the current transformer combined indoor failure zone automatic switch including the other current transformer support insulator in the present invention, anyone of ordinary skill in the field to which the present invention belongs, It will be said that there is a technical spirit of the present invention to the extent that modifications can be made.

As described above in detail by the current transformer combination type indoor failure zone automatic switch according to the present invention,

As described above, the current transformer support insulator according to the present invention can permanently play a role as a reliable current transformer, and permanent current stability as a current transformer support insulator structure composed of a current transformer independently of the fixed part support insulator It is possible to secure the required sufficient insulation distance between phases, and during the opening and closing operation, the supporting part and the current transformer supporting insulator share the opening and closing shock efficiently and efficiently, and by using a small amount of insulating member, It is easy to handle and transport, and it is inexpensive by adding only the current transformer support insulator in addition to the fixed part support insulator that is standardized, and it is also inexpensive, and it is possible to reduce the cost when it is replaced. It is possible to apply by separating the current transformer support insulator, It can be configured adjacent to the switchgear of the automatic switchgear to minimize the exposure of the charging part even when connecting the busbar formed inside the switchgear.It can be fixed firmly by the support of the current transformer support insulator, and it is a compact package type. It is also suitable for installation in the switchgear, so that the insulation distance can be secured even when mutual interference, maintenance, replacement, and regular or occasional inspection work with adjacent components.

Claims (1)

A circular hermetic current transformer assembly 100 formed thereon so as to detect transient failure and overload current on the load side; An inlet terminal 120 for inputting primary power to a current transformer assembly 100 extending downward through a central portion of the current transformer support insulator 110 to be electrically connected to the current transformer; A support part 131 for fastening with the frame 130 at the bottom of the current transformer support insulator 110; A fixed electrode 141 formed at a position in contact with the current transformer assembly 100 to enable supply of power to the secondary side; A shield ring 142 positioned outside the fixed electrode 141 to relax an electric field; The fixing part 140 coupled to the current transformer assembly 100 by the lock nut 146 in a state in which the bracket 144 for coupling the fixing part support insulator 143 to the lower end is provided with the anti-vibration rubber 145. Wow; A movable electrode 150 selectively contacting with a position in contact with the fixed electrode 141 while reciprocating around the movable shaft 151; An inner circumferential surface of the movable electrode 150 having a cylindrical sliding shaft 152 which is in contact with and maintains an electrical connection during movement; First and second tulip contacts 153 and 156 elastically installed at both ends of the sliding shaft 152 to have a plurality of connecting pieces 154 and 157 circumferentially by the contact springs 155 and 158. )and; It is fixed to the outer circumferential surface of the sliding shaft 152 by the snap ring 161 to be configured to be adjacent to the position in contact with the second tulip contact 156 at the end of the reciprocating housing 160 to improve the insulation strength A rectifying member 162 and a shield 172; The inner surface of the housing 160 is installed between the first tulip contact 153 is provided with an O-ring 163 for improving the operating characteristics by exhibiting the required closing and opening speed Current transformer combination type indoor failure section automatic switchgear.