KR101596105B1 - Metal Clad Switchgear with electric equipments combined Gas Insulated Sub-unit - Google Patents

Abstract

A metal clad enclosure comprising: a gas insulated subunit having a plurality of power devices for carrying out an electrical switchboard function, the gas insulated subunits being filled with gas for insulation between a plurality of power devices; A bus bar located at the rear surface of the gas insulated subunit, for introducing and withdrawing electric power to the gas insulated subunit and providing air insulation conditions; And a device enclosing a gas insulated sub unit and a housing surrounding the bus chamber, the gas insulated sub unit including a door part provided on a front surface of the gas insulated sub unit.

Description

Technical Field [0001] The present invention relates to a metal clad switchgear with electric combined equipments,

More particularly, the present invention relates to a metal closure enclosure with an equipment composite gas insulated subunit. More particularly, the present invention relates to a metal enclosed enclosure with an LBS, a power fuse, a MOF socket, This is a metal closure enclosure with an equipment composite type gas insulated sub unit that is made into a device and housed in a switchboard on one side to improve compactness and convenience of maintenance.

The switchboard is a water distribution and distribution system including switches such as LBS, a power fuse for circuit protection and a MOF for billing.

Closed switchboard means a switchboard in which the components for performing the function of the switchboard are closed and assembled with a grounded metal body. A metal-clad switchgear is a closed switchboard with compartments with metallic bulkheads with components grounded.

Conventional Metal Clad Switchgears are used to store 1 to 2 pieces of equipment such as LBS, Power Fuse, MOF (Metering out fit) and LA (Lightning Arrester) So that it occupies a lot of space.

The cable entrances are either top or bottom and are connected to the original LBS and are configured to protect the circuit against fault currents with LBS interlocked or uninterrupted power fuses.

The bus bar is connected to the MOF to measure the voltage and current, and sends a signal to the meter to use as billing data. Then, the load is distributed through the PT (Power Transformer) half or the VCB half, and the load current switching and fault current interruption of the feeder is performed.

However, the conventional metal-clad enclosed switchboard is largely bulky and generates noise due to the use of air LBS, and it is difficult to form a partition wall. Also, since the connection of the LBS, the power fuse, and the MOF is made in air, a large storage space is required due to the insulation distance.

A problem to be solved by the present invention is that a device such as an LBS, a power fuse, and a MOF socket is mounted on a gas insulated sub unit to make a single compact device, which is housed in a switchboard on one side, The present invention also provides a metal cladding enclosed switchgear having an improved composite gas insulated sub unit.

The problems to be solved by the present invention are not limited to the above-mentioned problems, and other problems not mentioned can be clearly understood by those skilled in the art from the following description will be.

According to an aspect of the present invention, there is provided a metal closure enclosure including: a gas insulated sub unit in which a plurality of power devices for performing an electrical switchboard function are embedded and gas is filled for insulation between a plurality of power devices; A bus bar located at the rear surface of the gas insulated subunit, for introducing and withdrawing electric power to the gas insulated subunit and providing air insulation conditions; And a device enclosing a gas insulated sub unit and a housing surrounding the bus chamber, the gas insulated sub unit including a door part provided on a front surface of the gas insulated sub unit.

The gas insulated subunit may include an LBS (Load Breaker Switch), a power fuse, and a MOF socket, and a MOF installed outside the gas insulated subunit may be connected to the MOF socket.

The gas insulated subunit includes: an upper air bushing portion for performing current attraction; An intermediate air bushing portion for connecting the power branch and the LA installed in the bus room; And a lower air bushing portion for connecting to a bus bar of the bus barrel.

The gas insulated subunit can be installed so that the power fuse, MOF, is replaceable at the front.

LBS, power fuse, MOF socket can be installed on one side.

The LBS, the power fuse, and the MOF may be installed on one side through a vertical array of upper, middle, and lower portions.

The power fuse is installed in a gas insulated subunit surrounded by an enclosure of insulating material and can be configured to be opened and replaced by opening the insulation material enclosure.

An auxiliary for supporting the lower surface of the gas insulated sub unit and for reducing the vertical length of the gas insulated sub unit so as to reduce the gas filling amount of the gas insulated sub unit in correspondence with the installation height of the MOF installed on the front surface of the gas insulated sub- A support portion may be provided in addition to the support.

According to the present invention, LBS, power fuse and MOF are collectively housed in a gas tank subunit so that gas insulation can be made compact and the wiring distance between devices can be minimized, so that LBS, power fuse, It is possible to drastically reduce the number and size of the switchboard in the switchboard.

It also facilitates the accessibility of MOF and power fuses, allowing easy replacement by opening only the front door.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a view showing an appearance of a metal closure enclosure with an equipment type composite gas insulatedsubunit according to an embodiment of the present invention; FIG.
FIG. 2 is a view showing the inside of a metal closure switchboard having a combined-type gas insulated sub-unit according to an embodiment of the present invention.
FIG. 3 is a side view of a metal closure switchboard with a combined gas insulated sub-unit according to an embodiment of the present invention.
4 is a view showing a gas insulated subunit and MOF in a metal closure enclosure with an equipment composite gas insulated sub unit according to an embodiment of the present invention.
5 is a view showing a gas insulated sub unit in a metal closure enclosure with an equipment composite gas insulated sub unit according to an embodiment of the present invention.

Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings. It should be understood, however, that there is no intention to limit the scope of the present invention to the embodiment shown, and other embodiments which are degenerative by adding, changing or deleting other elements or other embodiments falling within the spirit of the present invention Can be proposed.

Although the term used in the present invention is a general term that is widely used at present, there are some terms selected arbitrarily by the applicant in a specific case. In this case, since the meaning is described in detail in the description of the corresponding invention, It is to be understood that the present invention should be grasped as a meaning of a non-term.

That is, in the following description, the word 'comprising' does not exclude the presence of other elements or steps than those listed.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a view showing an appearance of a metal closure enclosure with an equipment type composite gas insulatedsubunit according to an embodiment of the present invention; FIG.

Referring to FIG. 1, a metal closure switchboard 100 having a combined gas insulated sub-unit according to an embodiment of the present invention includes a door 110 on a front surface thereof, a housing 120 ). A pressure port 130 for discharging gas is formed in the upper portion of the housing 120 in the event of an arc accident.

The door portion 110 includes a first door portion 111, a second door portion 112, and a third door portion 113 from the lower end. The present invention is not limited thereto, and the door portion 110 may be embodied as an integral door.

The MOF is installed inside the first door portion 111, and the first door portion 111 is opened when the MOF is exchanged, so that the MOF exchange operation can be performed.

Inside the second door portion 112, a gas insulated sub unit in which insulated gas is filled is installed in a state where the main power device of the switchboard is built in. The gas insulated subunit incorporates an LBS and a power fuse. When the power fuse is exchanged, the second door portion 112 is opened and the power fuse replacement operation can be performed.

A meter is installed inside the third door part 113 and is installed so as to see through the transparent window. The third door part 113 may be provided with a voltage detector and a current-voltage operation lamp.

On the side surface of the housing part 120, air bushings are provided for electrically connecting the busbars to each other when the switchboards are installed by being heated.

FIG. 2 is a view showing the inside of a metal closure switchboard having a combined-type gas insulated sub-unit according to an embodiment of the present invention.

Referring to FIG. 2, a metal closure switchboard 100 having a combined-type gas insulated sub-unit according to an embodiment of the present invention includes a gas insulated sub- Unit 140 and a bus barrel 150 provided with a partition wall in the gas insulated sub unit 140.

The gas insulated subunit 140 is located on the rear side of the first door portion 111 and the second door portion 112. Accordingly, the first door portion 111 and the second door portion 112 can be opened to exchange or check the main electric power equipment installed in the gas insulated subunit 140. [

The gas insulated subunit 140 is filled with insulating gas in a state in which the LBS 141, the power fuse 142, and the MOF socket 143a are incorporated. As the insulating gas, for example, SF6 gas may be used. SF6 gas has insulation characteristics comparable to insulating oil at 2-3 [㎏ / ㎠] and SOHO performance of about 100 times of air, and is very suitable because it uses the same type of gas for SOHO and insulation.

The LBS (Load Breaker Switch) 141 is a switch that can shut off or conduct the load current (less than 630 A) in a steady state. It is widely used as an inlet switch of the switchboard. . If there is a 3-phase load, it is preferable to use a power fuse in combination with a 3-pole load switch with trip device. In the operation, the operation indicator with the power fuse protrudes, and the trip device operates to automatically open the movable load contact by the force accumulated in the spring. Therefore, any power fuse connected to the three phases can prevent the image formation.

A power fuse (PF) 142 is a fuse 200A for short-circuit protection of high-voltage and special high-voltage equipment. The current limiting type fuse is a fuse that cuts off the fault current by forcibly cutting the fault current by generating a high arc resistance. The fuse element and the silicon are filled and sealed in the sealed insulating case. The power fuse has the characteristics that it acts as the three devices of the breaker, the relay, and the transformer. It has the reliable operation characteristic even though it is an economical device, and it is not only cheap in price but also has the complete cutoff characteristic with no malfunction in over current .

A MOF (Metering out fit) 143 checks the flow of current and voltage to check the power consumption for charging.

In the bus room 150, a lightning arrestor (LA) 151 for protecting the switchboard from lightning is installed. The gas insulated subunit 140 is maintained in an insulated state by the insulating gas, while the bus chamber 150 is electrically insulated by air. The bus bar 150 includes a BUS chamber, and a BUS bar is installed to be electrically connected to the distribution board that is heated.

The LBS 141, the power fuse 142, and the MOF socket 143a are installed inside the gas insulated subunit 140. The LBS 141, the MOF socket 143a, Fill the SF6 gas in the vacuum state.

The inside of the gas insulated subunit 140 is electrically insulated from the LBS 141, the power fuse 142 and the MOF sockets 143a installed inside the gas insulated subunit 140, It becomes possible to keep the insulation distance compact.

The MOF 143 is connected to the MOF socket 143a of the gas insulated subunit 140.

FIG. 3 is a side view of a metal closure switchboard with a combined gas insulated sub-unit according to an embodiment of the present invention.

Referring to FIG. 3, a metal closure switchboard 100 having a combined-type gas insulated sub-unit according to an embodiment of the present invention includes a gas insulated sub unit 140, which is maintained in an insulated state by SF6 gas, And a bus bar 150 for maintaining an air-insulated state on the rear surface.

The gas insulated subunit 140 includes a lower air bushing 144a, an intermediate air bushing 144b, and an upper air bushing 144c. The lower air bushing portion 144a, the intermediate air bushing portion 144b, and the upper air bushing portion 144c are each provided with three pairs corresponding to R, T, and S three-phase power sources, respectively.

The lower air bushing portion 144a transfers the supplied power via the MOF 143 to the bus bar 150 through the MOF socket 143a and the wiring 145 to the bus bar and distributes the bus bar via the bus bar to the other busbars .

The MOF socket 143a is provided with an input terminal and an output terminal respectively for transferring power that has passed through the power fuse 142 to the MOF 143 and for receiving power again from the MOF 143. [

The intermediate air bushing portion 144b is provided to connect the power line branched from the power fuse 142 to the LA 151 installed in the bus chamber 150.

The upper air bushing portion 144c is provided to draw power supplied from the substation into the LBS 141. [

4 is a view showing a gas insulated subunit and MOF in a metal closure enclosure with an equipment composite gas insulated sub unit according to an embodiment of the present invention. 5 is a view showing a gas insulated sub unit in a metal closure enclosure with an equipment composite gas insulated sub unit according to an embodiment of the present invention.

4 and 5, the gas insulated subunit 140 is filled with insulating gas in a state where the LBS 141, the power fuse 142, and the MOF socket 143a are incorporated. The MOF 143 is coupled to the MOF socket 1453a and receives power from the power fuse 142 installed in the gas insulated subunit 140 and outputs it to the wiring 145 of the gas insulated subunit 140 And supplied to the bus barrel 150 through the lower air bushing portion 144a.

The MOF 143 has a built-in coil and surrounds the coil with epoxy. Therefore, the insulation rate is very excellent inside the MOF 143. Therefore, in order to connect the power that has passed through the MOF 143 to the BUS bar of the bus barrel 150, a certain wiring distance for air insulation is required. However, since the wiring 145 for connecting the power passed through the MOF 143 to the bus bar of the bus chamber 150 is installed inside the gas insulated subunit 140, the excellent gas of the gas insulated subunit 140 The length of the wiring 145 can be reduced due to the insulating effect.

Meanwhile, the power fuse 142 is configured such that the second door portion 112 can be opened and replaced in a state where an outer casing of an insulating material is installed in the gas insulated subunit 140. The wiring connecting the power fuse 142 and the MOF 143 and the wiring connecting the power fuse 142 and the LA 151 are installed in the gas insulated subunit 140, The wiring connecting the MOF 143 from the power fuse 142 and the wiring length to the LA 151 can be remarkably reduced.

An auxiliary support portion 153a for supporting the lower surface of the gas insulated subunit 140 is installed on the lower portion of the gas insulated subunit 140 in addition to the support pedestal 153. [ The auxiliary supporting portion 153a can reduce the vertical length of the gas insulated subunit 140 corresponding to the installation height of the MOF 143 installed on the front surface of the gas insulated subunit 140, 140 can be reduced.

As described above, the metal closure switchboard 100 according to an embodiment of the present invention includes components installed in the gas insulated subunit 140 capable of providing gas insulation conditions, Components other than the components installed in the unit 140 are configured to maintain an air-insulated state, so that any type of nirvass with a general air-insulated switchboard is possible.

In general, in order to satisfy the insulation condition, the LBS, the power fuse, and the MOF can not be installed in one switchboard, but they are required to be separately installed in each switchboard. However, The installation of the power fuse 142 and the MOF socket 143a in the gas insulated subunit 140 in which the state is maintained can be installed in a very small area. In addition, since the following components except for the power fuse 142 and the MOF socket 143a are installed in the bus barrel that provides general air insulation conditions, it is possible to appropriately utilize the characteristics of air insulation and gas insulation.

While the invention has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made therein without departing from the spirit and scope of the invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined by the equivalents of the claims and the claims.

Claims (8)

In a metal closure enclosure,
A gas insulated sub unit in which a plurality of power devices for performing an electrical switchboard function are embedded and gas is filled for insulation between the plurality of power devices;
A bus bar located at a rear surface of the gas insulated subunit for introducing and extracting electric power to the gas insulated subunit and providing air insulation conditions; And
And a housing surrounding the gas insulated sub unit and the bus barrel, the gas insulated sub unit including a door provided on a front surface of the gas insulated sub unit,
The gas insulated subunit includes an LBS, a power fuse, a MOF socket,
Wherein the MOF socket is connected to a MOF provided outside the gas insulated subunit,
Wherein the power fuse is enclosed in an enclosure of an insulating material and is installed in the gas insulated sub unit and is configured to be openable and replaceable by opening an inlet of the insulated material enclosure.
delete The gas sensor module according to claim 1,
An upper air bushing portion for performing current inflow;
An intermediate air bushing portion for connecting the power branch and the LA installed in the bus bar room; And
Further comprising a lower air bushing portion for connecting to a bus bar of the bus barrel. The gas sensor module according to claim 1,
The power fuse, and the MOF are provided so as to be replaceable on the front surface of the metal closure switchboard. The metal closure enclosure according to claim 1, wherein the LBS, the power fuse, and the MOF socket are provided on one side of the device. 6. The metal closure enclosure switchboard of claim 5, wherein the LBS, the power fuse, and the MOF are provided on one side of the upper, middle, and lower vertical arrangements. delete The method according to claim 1,
The vertical length of the gas insulated subunit is reduced so as to reduce the gas filling amount of the gas insulated subunit corresponding to the installation height of the MOF provided on the front surface of the gas insulated subunit, A metal closure enclosure with an integrated composite gas insulated sub unit.

Images