KR101338254B1 - Distributing panel for very high voltage - Google Patents

Abstract

The present invention relates to a distribution panel for extra high voltage, which enables installation of a load break switch (LBS) with a voltage detector (VD), a lightening arrester (LA), a fuse, and an earth switch that are all integrated in a reduced size. The distribution panel of the present invention includes an all-in-one LBS part connected to a service point of the distribution panel for connection to or blocking of an extra high voltage cable; a metering out fit (MOF) part connected to the all-in-one LBS part; a potential transformer (PT) part connected to the MOF part in series; a vacuum circuit breaker (VCB) part connected to the MOF part and the PT part; a current transformer (CT) part connected to the VCB part; and a digital compound gauge part for displaying signals detected by the PT part and the CT part and displaying values calculated using the signals, wherein the all-in-one LBS part is characterized by integrating a voltage detector (VD) serially connected to the LBS at a service point of the distribution panel; a lightening arrester (LA) connected to a single earth and connected in parallel to the LBS; a fuse connected to the LBS together with the LA; and an earth switch with one end connected to the fuse and the MOF part and the other end connected to the earth. [Reference numerals] (150) Digital compound gauge;(AA,BB) Pulling out

Description

Extra High Voltage Switchgear {Distributing panel for very high voltage}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an extra-high voltage switchgear, and more particularly, to an extra-high voltage switchgear configured to construct a load break switch (LBS) in which a voltage detector (VD), a lightening arrester (LA), a fuse, and a ground switch are integrally reduced.

The switchgear is a device for stepping down high voltage power supplied from a substation to a commercial voltage and supplying it to a customer. A power receiving facility for receiving high voltage power supplied from a substation and a substation for stepping down high voltage power received from a substation to a commercial voltage. Facilities include power distribution equipment, switchgear and other safety devices for supplying forcible power to the electrical equipment of each part of the building.

Closed switchgear applied to such a switchgear is an instrument, relay, transformer, vacuum breaker (Vacuum) for monitoring and controlling electric devices or circuits to receive high-voltage electricity and to reduce the pressure appropriately for each consumer load. Switching equipment such as circuit breaker (VCB) and disconnect switch (DS), busbar, etc. are concentrated in one place, and are divided by a metal or an insulating partition grounded to be isolated and stored in each unit circuit. Various forms, such as consisting of several compartment structures with separate spaces, are used.

Korean Registered Patent No. 10-0984509 (registered on September 24, 2010) puts safety first, such as buildings, factories and plants, petrochemical, steelmaking, construction, etc. A high-voltage switchgear that can be greatly reduced is described. In the high-voltage switchgear, the high-pressure switchgear includes a first compartment in which a vacuum circuit breaker is installed, and a second current transformer in which a plurality of instrument current transformers are installed and the instrument current transformer is insulated by an insulating plate. Comprising a compartment, a third compartment configured with a control unit for controlling the wiring state, and a fourth compartment in which the high voltage insulator and a plurality of busbar busbars are installed, the first compartment is equipped with a vacuum circuit breaker and cradle, A connector is formed at the rear end of the circuit breaker and is connected to the bushing of the cradle at the rear, and the spring is provided with a transparent partition window divided up and down in front of each bushing of the cradle. It is elastically supported in the closing direction, the transparent partition window is made of an excellent acrylic resin, the hinge hole is formed at one end and the hinge hole is characterized in that it is elastically supported in the closing direction is fixed with a fixing pin.

According to the disclosed technology, the distribution panel of the distribution panel can be made smaller by reducing the width of the distribution panel, thereby easily securing the installation space, simplifying the installation, and preventing the occurrence of arcing between adjacent busbar busbars. It is possible to check the closing stage of the vacuum circuit breaker easily by the lamp displayed on the lower front door without opening the door, and it is convenient to use, and the arc is not generated when the vacuum circuit breaker is turned on or off. It is possible to use the vacuum breaker safely, and it is possible to reduce the installation area of the busbar bus bar formed of copper and to reduce the manufacturing cost and to easily purchase commercially available parts at a low price. Maintenance costs will be low.

Korean Patent No. 10-1196704 (registered on October 26, 2012) adopts a high pressure wall through bushing and a low pressure wall through bushing with a built-in voltage sensor to construct a high stable system of power system. This article describes a partition compartment high-voltage closed switchgear with a voltage sensing function that can be easily installed and dismantled in a short time to improve the working environment.

According to the disclosed technology, a high voltage wall through bushing, a voltage indicator indicating the voltage of electricity introduced through the high voltage supply cable, a voltage indicating controller for sensing and controlling the voltage, an instrument transformer, a vacuum circuit breaker, an instrument current transformer, and a multifunctional digital protection relay High voltage switchgear including low voltage switchgear, surge absorber, control switch and low voltage wall through bushing, air circuit breaker, wiring breaker, instrument transformer, instrument current transformer, video current transformer, multi-function digital clock, earth leakage alarm, control switch The low pressure switchgear and the high pressure switchgear are partitioned partitioned high and low voltage closed switchgears having a compartment with a plurality of partitions partitioned by a metal plate. And an insulating insulator made of an insulator is arranged around the conductor, The panel locking part is installed in the panel, and the voltage sensing sensor is embedded in the panel locking part in a direction parallel to the conductor, and at the outer circumferential surface, a connection terminal is formed with the voltage sensing function sensor. Gradually decreasing, a plurality of radiating insulating projections projecting radially on the surface of the insulated pipe are radially formed at regular intervals, and protruding jaws having a larger diameter than a plurality of radiating insulating projections are formed at both ends of the insulated pipe. The connecting plate connected to the conductor is installed on the edge of the protruding jaw, and the low pressure wall through bushing is inserted into the conductor so as to be applied to high pressure and low pressure of 7.2 kV or less, and the panel locking part is installed at the center, Built-in voltage sensor in the direction parallel to the conductor inside, and voltage sensor on the outer surface Forming the connection terminal of the sensor, it characterized in that the plate is connected to the connecting conductors provided on each side end panel engaging portion.

Conventional switchgear as described above is composed of four panels (LBS (Load Break Switch) panel, MOF (Metering Out Fit) panel, PT (Potential Transformer) panel, VCB (Vacuum Circuit Breaker) panel) It has a closed switchgear structure and requires an installation area of at least 5,600 (mm) and 4,600 (mm) in width, which not only increases the outsourcing cost for panel manufacturing and assembly, but also can not be installed in an electric room with limited space. Therefore, the construction cost is increased, and there are space limitations and inefficiencies due to container loading at the time of export.

As described above, the conventional switchgear requires an enclosure design in consideration of securing an insulation distance, thereby increasing the manufacturing cost of the switchgear, and also requires a separate grounding work for discharging during power outage or maintenance work. That is, it has a disadvantage in that it has a cumbersome process of discharging each phase with the ground rod and connecting the ground rod to perform work. In particular, the conventional switchgear, as described above, requires a lot of space when the panel is applied, and there are many limitations in installing it in a narrow electrical room.

Korea Patent Registration No. 10-0984509 Korea Patent Registration No. 10-0347306

The technical problem to be achieved by the present invention is to solve the above-described disadvantages, to build a load break switch (LBS) integrating a voltage detector (VD), a lightening arrester (LA), a fuse, a ground switch integrally Provides a special high voltage switchgear.

It is an object of the present invention to provide a special high voltage switchgear for reducing the insulation distance between phases by shielding a phase composed of three-phase fixed and movable conductors using an insulator in an LBS.

In order to solve this problem, according to an aspect of the present invention, an integrated LBS (Load Break Switch) unit connected to the inlet of the extra-high voltage switchgear to perform the connection and disconnection of the extra-high voltage cable; A metering out fit (MOF) unit connected to the integrated LBS unit; PT (Potential Transformer) unit connected in parallel to the MOF unit; A VCB (Vacuum Circuit Breaker) unit connected to the MOF unit and the PT unit; A CT (Current Transformer) unit connected to the VCB unit; And a digital combined meter unit for displaying the signals detected by the PT unit and the CT unit and values calculated using the same; The integrated LBS unit, LBS is installed at the entry point of the extra-high pressure switchgear; A voltage detector (VD) connected in parallel with the LBS to an inlet of the extra-high voltage switchgear; A lightening arrester (LA) connected to a single ground and connected in parallel to the LBS; A fuse coupled to the LBS with the LA; And a ground switch having one end connected to the fuse and the MOF unit and the other end connected to ground integrally.

In one embodiment, the ground switch, the LBS is cut off, it characterized in that for blocking the secondary charge current discharge generated when the LBS cut off.

In one embodiment, the extra-high voltage switchgear, the integrated LBS unit, the MOF unit, the PT unit, the VCB unit, the digital composite instrument unit and the CT unit in one panel having a plurality of compartments Characterized in that.

In one embodiment, the integrated LBS unit, an LBS unit main body installed in the lower portion of the first compartment of the panel for fixing the components of the integrated LBS unit; A plurality of insulating shields having a lower portion fixed to an upper portion of the main body of the LBS portion, the upper portions being connected to each other by a connecting bar, and shielding a phase composed of three-phase fixed and movable conductors from each other; And two LBS rails which are respectively installed on both lower sides of the LBS unit body and move the LBS unit body back and forth.

In an embodiment, the PT unit may include: a PT unit body installed at a lower portion of the third compartment of the panel and fixing components of the PT unit; And two PT rails which are respectively installed at both lower sides of the PT part main body and move the PT part main body back and forth.

According to the present invention, LBS (Load Break Switch) in which a voltage detector (VD), a lightening arrester (LA), a fuse, and a ground switch are integrally reduced can be used to reduce surface area and volume (total installation area) compared to a conventional switchboard. It can be reduced to a quarter, which can reduce outsourcing costs for panel manufacturing and assembly, reduce material costs by more than 50 (%), and constrain the space by reducing the installation space of the switchboard by miniaturization and light weight. It can also be installed in the electrical room, which reduces the construction cost and facilitates the container loading at the time of export, which has the effect of meeting overseas demand.

According to the present invention, by using the insulator in the LBS to shield the phase consisting of the three-phase fixed conductor and the movable conductor to reduce the insulation distance between the phases, to reduce the manufacturing cost of the enclosure by the miniaturization of the switchboard, and also in the panel application This reduction has the effect that it can be efficiently installed in all the sites as well as the narrow electrical room.

According to the present invention, it is possible to withdraw LBS and PT (Potential Transformer) at the time of power failure work or maintenance work, it is also possible to smoothly perform the power failure work or maintenance work without cumbersome process.

1 is a view illustrating an extra-high pressure switchgear according to an embodiment of the present invention.
FIG. 2 is a diagram illustrating a panel of the extra-high voltage switchgear in FIG. 1.
3 is a view for explaining the integrated LBS unit in FIG.
4 is a view for explaining a PT unit in FIG. 1.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. However, the description of the present invention is merely an example for structural or functional explanation, and the scope of the present invention should not be construed as being limited by the embodiments described in the text. That is, the embodiments may be variously modified and may have various forms, and thus, the scope of the present invention should be understood to include equivalents for realizing the technical idea. Also, the purpose or effect of the present invention should not be construed as limiting the scope of the present invention, since it does not mean that a specific embodiment should include all or only such effect.

Meanwhile, the meaning of the terms described in the present invention should be understood as follows.

It is to be understood that when an element is referred to as being "connected" to another element, it may be directly connected to the other element, but there may be other elements in between. On the other hand, when an element is referred to as being "directly connected" to another element, it should be understood that there are no other elements in between. On the other hand, other expressions describing the relationship between the components, such as "between" and "immediately between" or "neighboring to" and "directly neighboring to", should be interpreted as well.

It should be understood that the singular " include "or" have "are to be construed as including a stated feature, number, step, operation, component, It is to be understood that the combination is intended to specify that it does not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

All terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, unless otherwise defined. Commonly used predefined terms should be interpreted to be consistent with the meanings in the context of the related art and can not be interpreted as having ideal or overly formal meaning unless explicitly defined in the present invention.

Now, a high pressure switchgear according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a view illustrating an extra-high pressure switchgear according to an embodiment of the present invention.

Referring to FIG. 1, the special high voltage switchgear 100 includes an integrated load break switch (LBS) unit 110, a metering out fit unit (MOF) unit 120, a PT (potential transformer) unit 130, and a VCB (Vacuum). The circuit breaker unit 140, the digital hybrid instrument unit 150, and the CT (Current Transformer) unit 160 are included.

The integrated LBS unit 110 performs connection and disconnection of a special high voltage cable (for example, three-phase four-wire) as a switch for opening and closing the load. The LBS 111 is connected to a VD (Voltage Detector) 112, LA ( Lightening Arrester 113, Fuse 114, and Earth Switch 115 together with the reduced size of the integrated implementation, one end is connected to the inlet of the high voltage switchgear 100 and the other end is MOF Connected to the unit 120.

The LBS 111 is a load switch (for example, 24 (KV) 630 (A)) which is automatically operated by electric power, and is installed at an entry point of the extra-high voltage switchgear 100, and the VD 112 at the entry point. And in parallel with the fuse 114 on the opposite side of the corresponding entry point.

The VD 112 is a detector (for example, 25.8 (KV)) that performs power display, and is connected in parallel with the LBS 111 to the entry point of the high-voltage switchgear 100.

LA 113 includes three lightning arresters (eg, 18 (KV) 5 (KA)), one end of which is connected to a single ground to protect the high voltage switchgear 100 from lightning strikes, the other end of which is an LBS 111 Are connected in parallel with the fuse 114.

The fuse 114 is a fuse (for example, 24 (KV) 40 (KA)) for protecting the extra-high voltage switchgear 100 from overvoltage and overcurrent, and one end thereof together with the LA 113 in the LBS 111. The other end is connected to the MOF unit 120 with the ground switch 115.

The ground switch 115 is a switch for performing R, S, T phase discharge during power failure or maintenance work by manual operation, one end of which is connected to the fuse 114 and the MOF unit 120 and the other end of which is connected to the ground. Is connected to ground.

In one embodiment, the ground switch 115 may be automatically cut off by an electric operation when the LBS 111 is cut off, and may block the secondary charging current discharge generated when the LBS 111 is cut off.

The MOF unit 120 includes a PT (for example, 13200/110 (V)) and a CT (for example, 75/5 (A)), and is a transformer current transformer for an electric meter for measuring power consumption. It is connected between the integrated LBS unit 110 and the PT unit 130.

The PT unit 130 is an instrument transformer having a fuse 131 and three PTs 132, one end of which is connected in parallel to the MOF unit 120 and the VCB unit 140, and the other end is a digital complex type. It is connected to the meter unit 150, detects the voltage value applied through the MOF unit 120 and delivers to the digital composite meter unit 150.

The VCB unit 140 is an extra high voltage circuit breaker (for example, 24 (KV) 630 (A)) for blocking the load end accident on the secondary side of the PT unit 130 or for maintenance. The PT unit 130 is connected to the MOF unit 120 and the other end is connected to the CT unit 160.

Digital composite instrument 150, one end is connected to the PT unit 130 and the other end is connected to the CT unit 160, the signal detected by the PT unit 130 and CT unit 160 (that is, Voltage value, current value) and the calculated value (power value, etc.) are displayed.

The CT unit 160 is an instrument current transformer having three CTs (for example, 100/5 (A)), and is connected to the VCB unit 140 and the digital hybrid instrument unit 150, and the VCB unit. Detects the current value flowing through the 140 and delivers it to the digital composite meter (150).

The extra-high voltage switchgear 100 having the above-described configuration is constructed by forming the LBS 111 in which the VD 112, the LA 113, the fuse 114, and the ground switch 115 are integrally reduced. The surface area and volume (total installation area) of the switchboard can be reduced to about one quarter, thereby reducing the outsourcing cost for manufacturing and assembling the panel 200 and reducing material costs by more than 50 (%). In addition, by reducing the installation space of the switchgear 100 by miniaturization and light weight can be installed in the electrical room with space constraints to reduce the construction cost and easy to mount the container at the time of export can meet the overseas demand.

FIG. 2 is a diagram illustrating a panel of the extra-high voltage switchgear in FIG. 1.

Referring to FIG. 2, the extra-high voltage switchgear 100 includes an integrated LBS unit 110, a MOF unit 120, a PT unit 130, a VCB unit 140, a digital composite instrument unit 150, and a CT unit. The 160 is provided in one panel 210 and installed.

The panel 210 includes four compartments 211 to 214, an integrated LBS unit 110 is installed in the first compartment 211, and an MOF unit 120 is installed in the second compartment 212. The PT compartment 130 is installed in the third compartment 213, and the VCB unit 140, the digital hybrid instrument 150, and the CT unit 160 are installed in the fourth compartment 214.

3 is a view for explaining the integrated LBS unit in FIG.

Referring to FIG. 3, the integrated LBS unit 110 further includes an LBS unit body 116, a plurality of insulation shield plates 117, and two LBS unit rails 118.

The LBS unit main body 116 is a support plate installed at the lower portion of the first compartment 211 of the panel 210, and the components of the integrated LBS unit 110 (that is, the LBS 111) VD 112 at the top thereof. ), LA 113, fuse 114, ground switch 115, insulation shield plate 117, and LBS rail 118 are fixedly installed.

The insulation shield plate 117 is made of an insulator such as an acrylic resin, and the lower part is fixed to the upper part of the LBS part main body 116, and the upper part is connected by one or more bars for more stable fixing. It is connected to each other, the phase between the three-phase fixed conductor and the movable conductor is shielded from each other to reduce the insulation distance between the phase to install.

The LBS part rail 118 is provided in the lower both sides of the LBS part main body 116, and moves the LBS part main body 116 back and forth.

The extra-high voltage switchgear 100 having the integrated LBS unit 110 as described above uses an insulator in the integrated LBS unit 110 to shield the phase composed of three-phase fixed conductors and movable conductors to reduce the insulation distance between the phases. By doing so, it is possible to reduce the manufacturing cost of the enclosure by miniaturization of the switchgear 100, the space is reduced even when the panel 210 is applied can be efficiently installed in all sites as well as narrow electrical room.

The extra-high voltage switchgear 100 having the integrated LBS unit 110 as described above is integrated with the integrated LBS unit at the time of power failure work or maintenance work by rails 118 respectively provided on both lower sides of the support body 116. By making it possible to withdraw 110, it is possible to smoothly perform maintenance work or blackout work without cumbersome processes.

In one embodiment, the integrated LBS unit 110 may be composed of an insulator body made of an insulator and a live wire sensing insulator for connecting the VD 112 to a bus line passing through the insulator body, and also includes a ground switch 115. Thus, the secondary charging current discharge generated when the LBS 111 is blocked may be blocked to completely eliminate an electric shock accident caused by the secondary charging current discharge.

4 is a view for explaining a PT unit in FIG. 1.

Referring to FIG. 4, the PT unit 130 further includes a PT unit body 133 and two PT unit rails 134.

The PT unit body 133 is installed at the lower portion of the third compartment 213 of the panel 210, thereby forming components of the PT unit 130 (ie, fuse 131 and PT 132) inside and outside. ), And fix the PT rail (134).

The PT part rail 134 is provided in the lower both sides of the PT part main body 133, and moves the PT part main body 133 back and forth.

The extra-high voltage switchgear 100 having the PT unit 130 as described above is constructed by the PT unit rails 134 provided on both sides of the lower part of the PT unit body 133, respectively. By making it possible to withdraw 130, it is possible to smoothly perform maintenance work or power failure work without cumbersome processes.

In one embodiment, the extra-high voltage switchgear 100 is a lower portion of the MOF unit 120 is installed in the lower portion of the second compartment 212 of the panel 210, or the fourth compartment 214 of the panel 210. As described above, the VCB unit 140 provided in the constituting the main body and the rail, respectively, can be made to be able to pull out the MOF unit 120 or the VCB unit 140 during an electrostatic work or a maintenance work.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, It belongs to the scope of right.

100: high voltage switchgear
110: integral LBS (Load Break Switch)
111: LBS
112: VD (Voltage Detector)
113: Lightening Arrester
114 and 131: fuses
115: Earth Switch
116: LBS body
117: insulation shield
118: LBS rail
120: MOF (Metering Out Fit) part
130: PT (Potential Transformer)
132: PT
133: PT unit body
134: PT rail
140: VCB (Vacuum Circuit Breaker)
150: digital hybrid instrument
160: CT (Current Transformer)

Claims (5)

An integrated LBS (Load Break Switch) unit connected to an inlet of the extra-high voltage switchgear to perform connection and disconnection of the extra-high voltage cable;
A metering out fit (MOF) unit connected to the integrated LBS unit;
PT (Potential Transformer) unit connected in parallel to the MOF unit;
A VCB (Vacuum Circuit Breaker) unit connected to the MOF unit and the PT unit;
A CT (Current Transformer) unit connected to the VCB unit; And
A digital combined meter unit for displaying the signal detected by the PT unit and the CT unit and a value calculated using the same;
The integrated LBS unit, LBS is installed at the entry point of the extra-high pressure switchgear;
A voltage detector (VD) connected in parallel with the LBS to an inlet of the extra-high voltage switchgear;
A lightening arrester (LA) connected to a single ground and connected in parallel to the LBS;
A fuse coupled to the LBS with the LA; And
The high voltage switchgear, characterized in that the one end is connected to the fuse and the MOF unit and the other end is integrally implemented with a ground switch connected to the ground.
The method of claim 1, wherein the ground switch,
The high voltage switchgear is cut off at the time of blocking the LBS, and the secondary charging current discharge generated at the time of blocking the LBS.
The method of claim 1,
The high voltage switchgear, characterized in that the integrated LBS unit, the MOF unit, the PT unit, the VCB unit, the digital composite instrument unit and the CT unit is installed in one panel having a plurality of compartments.
The method of claim 3, wherein the integrated LBS portion,
An LBS unit body installed at a lower portion of the first compartment of the panel to fix and install the components of the integrated LBS unit;
A plurality of insulating shields having a lower portion fixed to an upper portion of the main body of the LBS portion, the upper portions being connected to each other by a connecting bar, and shielding a phase composed of three-phase fixed and movable conductors from each other; And
Specially high pressure switchgear is installed on both lower sides of the LBS unit body, further comprising two LBS unit rail for moving the LBS unit body back and forth.
The method of claim 3, wherein the PT unit,
A PT unit body installed at a lower portion of the third compartment of the panel to fix and install the components of the PT unit; And
The high-pressure switchgear, which is installed on both lower sides of the PT unit main body, includes two PT unit rails for moving the PT unit main body back and forth.

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