WO2017099271A1 - Metal-closed type switchgear - Google Patents

Metal-closed type switchgear Download PDF

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Publication number
WO2017099271A1
WO2017099271A1 PCT/KR2015/013445 KR2015013445W WO2017099271A1 WO 2017099271 A1 WO2017099271 A1 WO 2017099271A1 KR 2015013445 W KR2015013445 W KR 2015013445W WO 2017099271 A1 WO2017099271 A1 WO 2017099271A1
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chamber
compartment
enclosure
breaker
pressure
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PCT/KR2015/013445
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French (fr)
Korean (ko)
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문복성
강덕형
황규석
홍승광
김유하
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주식회사 광명전기
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Publication of WO2017099271A1 publication Critical patent/WO2017099271A1/en

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
    • H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
    • H02B13/025—Safety arrangements, e.g. in case of excessive pressure or fire due to electrical defect

Definitions

  • the present invention relates to a metal closed switch gear, and more particularly, to a metal closed switch gear loaded with electric devices such as a circuit breaker.
  • Metal-closed switchgear is an assembly device consisting of mechanisms for supervisory control such as breakers, transformers for transformers, buses, connecting conductors, etc .. It is housed in a grounded metal box and is insulated from each other by a grounded metal wall. I say that.
  • the purpose of adopting the isolation structure by the ground metal wall is to minimize the life-saving and the aftermath of the accident even if an internal arc accident such as a short circuit or ground fault occurs in the first breaker chamber of the vessel. It is in doing it.
  • the above-mentioned metal-closed switchgear can release the expansion air to the outside even if an internal arc accident occurs in any room, and can prevent accident spread.
  • this metal-closed switch gear needs to provide a pressure-proof box on its side, so that a large enlargement is required compared with the installation area of the metal-closed switch gear.
  • the disclosed switchgear includes a plurality of upper breaker chambers which are horizontally coupled to each other with a partition wall at an upper end thereof; A plurality of lower breaker chambers installed transversely coupled with a partition wall at a lower end corresponding to the plurality of upper breaker chambers; A plurality of LV chambers installed in a portion of an upper portion of the lower breaker chamber; It is supposed to include a pressure-resistant passage structure formed through the switchboard laterally between the lower breaker chamber and the upper breaker chamber at the rear of the plurality of LV chambers.
  • the breaker chambers have a built-in breaker and become a high pressure side
  • the LV chambers have a built-in control means and a low pressure side.
  • the pressure discharge passage forms an empty space (upper space) in the center of the upper breaker chamber and discharges the expanded air generated in the lower breaker chamber and the upper breaker chamber to the outside through the empty space.
  • control means built in one LV chamber controls the breaker of the upper breaker chamber directly above and the breaker of the lower breaker chamber directly below
  • the circuit part of the control means becomes complicated and enlarged, resulting in maintenance cost and The manufacturing cost is increased, the occupied space is increased, and moreover, the empty space in the center of the upper breaker chamber causes a problem that the breaker is a dance storage space which cannot be built in.
  • the present invention has a problem in solving the above problem.
  • the present invention the upper breaker chamber disposed in the front upper space in the enclosure, the lower breaker chamber disposed in the front lower space in the enclosure, the common bus room arranged in the central space of the enclosure behind the upper breaker chamber and the lower breaker chamber, facing the upper breaker chamber
  • the upper cable chamber disposed in the rear upper space in the enclosure, and the lower cable chamber disposed in the rear lower space in the enclosure facing the lower breaker chamber are provided as compartments in the enclosure,
  • An upper pressure passage for pressure-releasing one compartment of the upper breaker chamber so that the space itself of one compartment of the upper breaker chamber is connected to a central pressure outlet provided in the center of the ceiling of one compartment of the upper breaker chamber.
  • Compartment spaces provided on both sides of one compartment of the upper breaker chamber by separating a lower pressure passage for pressure release of one compartment of the lower breaker chamber from one compartment of the upper breaker chamber are provided in the upper breaker chamber. Made to be connected to one compartment of the lower blocking chamber while being connected to both side pressure outlets provided on both sides of the ceiling of one compartment;
  • the pressure-dissipating passage for pressure-reducing the bus chamber is separated from the upper cable chamber so that compartment spaces provided at both sides in front of the upper cable chamber are connected to both side pressure outlets provided at both sides in front of the ceiling of the upper cable chamber.
  • An upper pressure discharge passage for pressure-proofing the upper cable chamber is made such that the upper cable chamber space itself is connected to a central pressure port provided at the center behind the ceiling of the upper cable chamber;
  • Lower pressure passages for pressure-reducing the lower cable chamber are separated from the upper cable chamber so that compartment spaces provided at both sides of the upper cable chamber are connected to both side pressure-reducing holes provided at both sides of the ceiling behind the upper cable chamber. The problem can be solved by making it connected to the lower cable chamber.
  • the present invention by the above problem solving means, while stacking the two feeders in the same size as the existing size, separate control means for each breaker to be embedded in a separate compartment, the high-voltage circuit is live state In addition, it is possible to maintain the control circuit at the same time, and to provide a separate pressure discharge path to the upper and lower breaker rooms, the mother room, and the upper and lower cable rooms, so that the aftermath of the accident is not transmitted to the neighboring switchboard.
  • Metal closed switchgear can be provided that can reduce maintenance and manufacturing costs.
  • FIG. 1 is a plan view of FIG. 1
  • FIG. 3 is a conceptual perspective view illustrating compartments and pressure discharge passages of an enclosure except for a wiring structure in FIG. 1;
  • FIG. 3 is a conceptual perspective view illustrating compartments and pressure discharge passages of an enclosure except for a wiring structure in FIG. 1;
  • Fig. 1 the closed metal switchgear of this embodiment is indicated by the reference numeral 100.
  • the metal closed switch gear 100 has a circuit breaker, a control means, a bus bar, and a cable as in the conventional case.
  • the metal closed switch gear 100 includes an upper breaker chamber 10 of a hexahedron disposed in an upper upper space in the enclosure 1, and The lower breaker chamber 20 of the hexahedron disposed in the lower front space in the enclosure 1, the bus bar chamber disposed in the central space of the enclosure 1 behind the upper breaker chamber 10 and the lower breaker chamber 20 ( 30) an upper cable chamber 40 having an A cross-sectional shape disposed in a rear upper space in the enclosure 1 facing the upper breaker chamber 10, and a rear side in the enclosure facing the lower breaker chamber 20;
  • the lower cable chamber 50 having a N-shaped cross section disposed in the lower space is partitioned as a compartment by a plurality of partition wall portions and provided in the enclosure 1.
  • the upper breaker chamber 10 is made of two compartments 11 and 12 so that one compartment 11 having a cross-sectional shape is a built-in circuit breaker, and the other compartment 12 of the hexahedron has a control means built therein. It is.
  • doors A and B are mounted so as to be openable and openable.
  • the lower circuit breaker chamber 20 is made of two compartments in the same manner as the upper circuit breaker chamber 10 so that one compartment 21 having a cross-sectional shape of the letter “A” has a built-in circuit breaker and the other compartment 22 of the hexahedron.
  • the control unit is built in. Doors C and D are mounted in the two compartments 21 and 22 so as to be openable and openable.
  • the upper breaker chamber pressure relief passage 13 for pressure-releasing the one compartment 11 of the upper breaker chamber 10 is the space itself of the one compartment 11 of the upper breaker chamber 10. It is made to be circulated to be connected to the central breaker chamber pressure-pressure port 14 provided in the center of the enclosure ceiling of one compartment 11 of the upper breaker chamber 10.
  • the lower breaker chamber pressure passage 23 for pressure release of the one compartment 21 of the lower breaker chamber 20 is isolated from the one compartment 21 of the upper breaker chamber 20 in the upper part. Compartment spaces extending in the vertical direction in cooperation with both side walls of the enclosure 1 on both sides of the one compartment 11 of the breaker chamber 10 are the one compartment 11 of the upper breaker chamber 10. It is made to be circulatingly connected to the one compartment 21 of the lower shut-off chamber 20, while being circulated to be connected to both side breaker chamber pressure-pressure port 24 provided on both sides of the ceiling.
  • the busbar chamber pressure passage 33 for evacuating the busbar chamber 30 is isolated from the upper cable chamber 40 and cooperates with both sidewalls of the enclosure 1 at both sides in front of the upper cable chamber in the vertical direction. Compartment space is formed to be connected to the bus compartment 30, while being distributed so as to be circulated to both sides of the mother bus chamber pressure outlet 34 provided on both sides in front of the enclosure ceiling of the upper cable chamber (40). have.
  • the upper cable room pressure passage 43 for pressure-limiting the upper cable room 40 is a central cable room where the space itself of the upper cable room 40 is provided at the center of the rear of the ceiling of the upper cable room 40. It is made to connect to the pressure port 44 so that distribution is possible.
  • the lower cable chamber pressure passage 53 for evacuating the lower cable chamber 50 is isolated from the upper cable chamber 40 and is provided on both side walls of the enclosure 1 at both sides of the upper cable chamber 40.
  • the compartment space, which extends in cooperation in the vertical direction, is circulated to the lower cable chamber 50 while being connected to the cable chamber pressure outlets 54 provided at both sides of the upper side of the ceiling of the upper cable chamber 40. It is made to be connected as possible.
  • the metal-closed switch gear 100 as shown in Figure 1, the central breaker chamber pressure release port 14, the both side breaker chamber pressure release port 24 and the both side bus chamber pressure release port ( 34 is enclosed in the width direction of the enclosure 1 and fixed to the ceiling of the enclosure 1, so that at least any one of these pressure-release openings corresponding to the upper breaker chamber 10, the lower block A first duct 15 for discharging the expansion air of the air chamber 20 or the mother chamber 30 to the outside; And enclosing the both side cable pressure relief holes 54 so as to be opened in the width direction in both directions of the enclosure 1 and fixed to the ceiling of the enclosure 1 so that at least one of these pressure relief holes is opened.
  • a second duct 55 for discharging the expanded air of the 40 or lower cable chamber 50 to the outside is included.
  • a central breaker chamber pressure relief port (14) is opened such that the expansion air is discharged out of the enclosure (1) through the first duct (15) via the upper circuit breaker chamber pressure passage (13);
  • both side bus chamber pressure discharge holes 34 are opened by the pressure of the expansion air, so that the expansion air passes through the bus chamber pressure passage 33.
  • the first duct 15 to be released to the outside of the enclosure (1);
  • both side cable chamber pressure release holes 54 are opened by the pressure of the expansion air, so that the expansion air is the lower cable chamber pressure passage. Via 53 is discharged to the outside of the enclosure 1 through the second duct (55).
  • the metal-closed switch gear 100 while stacking the two feeders in the same enclosure as the existing size, by making a separate control means for each breaker to be embedded in a separate compartment, the high-voltage circuit is live state

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Patch Boards (AREA)

Abstract

The present invention relates to a metal-closed type switchgear having two feeders stacked in a housing having the same size as that of a conventional housing, and having a control means separately formed at each circuit breaker and embedded in a separate compartment, so as to enable a control circuit to be maintained and repaired even in a state where a high-voltage circuit is a live wire. In addition, the present invention relates to a metal-closed type switchgear which enables pressure relief passages to be separately provided at upper and lower circuit breaker rooms, a bus bar room, and upper and lower cable rooms, so as to prevent aftereffects of an accident from being transferred to a neighboring distributing board and thus enable reduction of maintenance costs and manufacturing costs.

Description

금속폐쇄형 스위치기어Metal Closed Switch Gear
본 발명은 금속폐쇄형 스위치기어에 관한 것으로서, 특히 차단기 등의 전기기기를 다단적재한 금속폐쇄형 스위치기어에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a metal closed switch gear, and more particularly, to a metal closed switch gear loaded with electric devices such as a circuit breaker.
금속폐쇄형 스위치기어는 차단기, 계량기용 변성기, 모선, 접속도체 등외 감시제어에 필요한 기구로 이루어진 집합 장치이며, 접지된 금속 함 내에 수납되어 있으며, 또한 단위회로마다 접지 금속벽에 의해 격리되어 있는 구조의 것을 말한다.Metal-closed switchgear is an assembly device consisting of mechanisms for supervisory control such as breakers, transformers for transformers, buses, connecting conductors, etc .. It is housed in a grounded metal box and is insulated from each other by a grounded metal wall. I say that.
접지 금속벽에 의한 격리 구조를 채용하는 목적은, 예컨대, 함내의 제1의 차단기실에서 단락, 지락 사고 등의 내부 아크 사고가 발생하는 경우를 만나도, 사고에 의한 인명피혜와 사고 여파를 최소한으로 하는 것에 있다.The purpose of adopting the isolation structure by the ground metal wall is to minimize the life-saving and the aftermath of the accident even if an internal arc accident such as a short circuit or ground fault occurs in the first breaker chamber of the vessel. It is in doing it.
그러나, 차단기등의 전기 기기를 다단 쌓아 하여 수납하는 금속폐쇄형 스위치 기어에 있어서는, 예컨대 하단의 차단기실 등에서 내부 아크 사고가 발생하면 사고발생시의 과대한 내부압력상승에 대한 방출 경로를 가지고 있지 않은 경우가 있다. However, in a metal-closed switchgear that stacks and stores electrical equipment such as a circuit breaker, for example, when an internal arc accident occurs in a lower breaker chamber or the like, it does not have a discharge path for excessive internal pressure rise during the accident. There is.
이 때문에, 일본 특허공고 평6-067060호에 개시된 바와 같이, 내부 아크 사고에 의해 발생한 고온 고압의 팽창공기가, 함외로 방출되지 않고, 다른 구획의 전기 기기 등에 손상을 줄 염려가 있다. 이 점을 개선한 것으로서, 각 격실마다의 팽창공기를 방출하는 방압 상자를 금속폐쇄형 스위치 기어 본체의 측면으로 설치하여, 다단회로의 어떠한 방에서 발생한 내부 아크 사고를 만나도, 그 고온 고압의 팽창공기를 함 외로 방출시키는 것이 있다.For this reason, as disclosed in Japanese Patent Application Laid-Open No. 6-067060, high temperature and high pressure expansion air generated by an internal arc accident is not released to the outside, and there is a risk of damaging an electric device or the like in another section. In order to improve this point, a high pressure and high pressure air is provided even if an internal arc accident occurs in a room of a multistage circuit by installing a pressure-proof box for discharging the expansion air for each compartment on the side of the metal-closed switchgear body. There is a release to the outside.
상술한 금속폐쇄형 스위치 기어는, 어떠한 방에서 내부 아크 사고가 발생하여도, 그 팽창공기를 외부에 방출할 수 있기 때문에, 사고파급을 방지할 수 있다.The above-mentioned metal-closed switchgear can release the expansion air to the outside even if an internal arc accident occurs in any room, and can prevent accident spread.
그렇지만, 이 금속폐쇄형 스위치 기어는, 그 측면으로 방압 상자를 설치하는 것이 필요하기 때문에, 종래, 금속폐쇄형 스위치 기어의 설치 면적으로 비교하면 대폭적인 확대가 필요하게 된다.However, this metal-closed switch gear needs to provide a pressure-proof box on its side, so that a large enlargement is required compared with the installation area of the metal-closed switch gear.
따라서, 예컨대, 화력, 원자력 발전소, 변전소, 개폐소, 건설 등에서 다수의 피더(feeder)를 필요로 하는 금속폐쇄형 스위치 기어를 설치할 경우에는, 이러한 설치면적 증대는, 설치건물의 건설 등에 관련하여 간과할 수 없는 문제가 된다.Therefore, for example, in the case of installing a metal-closed switch gear that requires a plurality of feeders in thermal power plants, nuclear power plants, substations, switching stations, construction, etc., such an increase in the installation area is overlooked in connection with construction of an installation building, and the like. It can't be done.
이 때문에, 그 설치 면적을 확대하지 않고 내부 아크 사고에 대응 가능한, 차단기등을 다단 적재한 금속폐쇄형 스위치 기어가 요구받고 있다.For this reason, there is a demand for a metal-closed switch gear in which a circuit breaker or the like is stacked in multiple stages, which can cope with an internal arc accident without expanding its installation area.
이러한 요구를 따르는 스위치 기어가 한국 특허공개 제10-2015-0076392호에 개시되어 있다.A switch gear complying with this requirement is disclosed in Korean Patent Laid-Open No. 10-2015-0076392.
상기 개시된 스위치 기어는, 상단에 서로 격벽을 두고 횡으로 결합되어 설치되는 복수개의 상부 차단기실; 상기 복수개의 상부 차단기실에 대응하여 하단에 서로 격벽을 두고 횡으로 결합되어 설치된 복수개의 하부 차단기실; 상기 하부 차단기실의 상부 일부 영역에 설치된 복수개의 LV실; 상기 복수개의 LV실의 뒷쪽에 상기 하부 차단기실과 상기 상부 차단기실의 사이에, 상기 배전반을 횡으로 관통하여 형성된 방압 통로 구조물을 포함하는 것으로 되어 있다.The disclosed switchgear includes a plurality of upper breaker chambers which are horizontally coupled to each other with a partition wall at an upper end thereof; A plurality of lower breaker chambers installed transversely coupled with a partition wall at a lower end corresponding to the plurality of upper breaker chambers; A plurality of LV chambers installed in a portion of an upper portion of the lower breaker chamber; It is supposed to include a pressure-resistant passage structure formed through the switchboard laterally between the lower breaker chamber and the upper breaker chamber at the rear of the plurality of LV chambers.
여기에서 상기 차단기실들은 차단기가 내장되어 고압측이 되고 상기 LV실들은 제어수단이 내장되어 저압측이 된다.Here, the breaker chambers have a built-in breaker and become a high pressure side, and the LV chambers have a built-in control means and a low pressure side.
상기 방압 통로는 상기 상부 차단기실의 중앙에 빈공간(상부 스페이스)을 만들어어서 이 빈공간을 통하여 하부 차단기실과 상부 차단기실에서 발생된 팽창공기를 외부로 방출하게 되어 있다.The pressure discharge passage forms an empty space (upper space) in the center of the upper breaker chamber and discharges the expanded air generated in the lower breaker chamber and the upper breaker chamber to the outside through the empty space.
하지만, 하나의 LV실에 내장된 제어수단이 바로 위에 있는 상부 차단기실의 차단기와 바로 아래에 있는 하부 차단기실의 차단기를 제어하게 되어 있어서, 제어수단의 회로부가 복잡해지고, 비대해져서 유지보수비용과 제조비용이 증대되고, 아울러 점유공간이 커지게 되고, 더우기 상기 상부 차단기실의 중앙에 빈공간이 차단기가 내장될 수 없는 무용저장공간이 된다는 문제를 야기한다.However, since the control means built in one LV chamber controls the breaker of the upper breaker chamber directly above and the breaker of the lower breaker chamber directly below, the circuit part of the control means becomes complicated and enlarged, resulting in maintenance cost and The manufacturing cost is increased, the occupied space is increased, and moreover, the empty space in the center of the upper breaker chamber causes a problem that the breaker is a dance storage space which cannot be built in.
본 발명은 상기된 문제를 해결하는 것에 과제를 가진다.The present invention has a problem in solving the above problem.
본 발명은, 함체 내의 앞쪽 상부공간에 배치된 상부 차단기실, 함체 내의 앞쪽 하부공간에 배치된 하부 차단기실, 상부 차단기실과 하부 차단기실 뒤쪽의 함체 중앙공간에 배치된 공동 모선실, 상부 차단기실과 마주하는 함체 내의 뒤쪽 상부공간에 배치된 상부 케이블실, 및 하부 차단기실과 마주하는 함체 내의 뒤쪽 하부공간에 배치된 하부 케이블실을 격실로서 함체 내에 마련하고, The present invention, the upper breaker chamber disposed in the front upper space in the enclosure, the lower breaker chamber disposed in the front lower space in the enclosure, the common bus room arranged in the central space of the enclosure behind the upper breaker chamber and the lower breaker chamber, facing the upper breaker chamber The upper cable chamber disposed in the rear upper space in the enclosure, and the lower cable chamber disposed in the rear lower space in the enclosure facing the lower breaker chamber are provided as compartments in the enclosure,
상기 상부 차단기실을 2개의 격실로 만들어서 하나의 격실에는 차단기를 내장시키고 다른 하나의 격실에는 제어수단을 내장시키고; Making the upper breaker chamber into two compartments so that one compartment has a circuit breaker and the other compartment has control means;
상기 하부 차단기실을 2개의 결실로 만들어서 하나의 격실에는 차단기를 내장시키고 다른 하나의 격실에는 제어수단을 내장시키고; Making the lower breaker chamber into two deletions so that one compartment has a circuit breaker and the other compartment has a control means;
상기 상부 차단기실의 하나의 격실을 방압시키기 위한 상부방압통로를, 상기 상부 차단기실의 하나의 격실의 공간 자체가 상기 상부 차단기실의 하나의 격실의 천장 중앙에 구비된 중앙 방압구에 접속되게 하여 만들고; An upper pressure passage for pressure-releasing one compartment of the upper breaker chamber so that the space itself of one compartment of the upper breaker chamber is connected to a central pressure outlet provided in the center of the ceiling of one compartment of the upper breaker chamber. By making;
상기 하부 차단기실의 하나의 격실을 방압시키기 위한 하부방압통로를, 상기 상부 차단기실의 하나의 격실과 격리되어 상기 상부 차단기실의 하나의 격실 내의 양측부에 마련된 격실공간이 상기 상부 차단기실의 하나의 격실의 천장 양측에 구비된 양 측부 방압구에 접속되게 하면서 상기 하부 차단실의 하나의 격실에도 접속되게 하여 만들고;Compartment spaces provided on both sides of one compartment of the upper breaker chamber by separating a lower pressure passage for pressure release of one compartment of the lower breaker chamber from one compartment of the upper breaker chamber are provided in the upper breaker chamber. Made to be connected to one compartment of the lower blocking chamber while being connected to both side pressure outlets provided on both sides of the ceiling of one compartment;
상기 모선실을 방압시키기 위한 방압통로를, 상기 상부 케이블실과 격리되어 상기 상부 케이블실 앞쪽 양측부에 마련된 격실공간이 상기 상부 케이블실의 천장 앞쪽 양측에 구비된 양 측부 방압구에 접속되게 하면서 상기 모선실에도 접속되게 하여 만들고;The pressure-dissipating passage for pressure-reducing the bus chamber is separated from the upper cable chamber so that compartment spaces provided at both sides in front of the upper cable chamber are connected to both side pressure outlets provided at both sides in front of the ceiling of the upper cable chamber. To be connected to the mother room;
상기 상부 케이블실을 방압시키기 위한 상부방압통로를, 상기 상부 케이블실공간 자체가 상기 상부 케이블실의 천장 뒤쪽 중앙에 구비된 중앙 방압구에 접속되게 하여 만들고; 그리고An upper pressure discharge passage for pressure-proofing the upper cable chamber is made such that the upper cable chamber space itself is connected to a central pressure port provided at the center behind the ceiling of the upper cable chamber; And
상기 하부 케이블실을 방압시키기 위한 하부방압통로를, 상기 상부 케이블실과 격리되어 상기 상부 케이블실 내의 양측부에 마련된 격실공간이 상기 상부 케이블실의 천장 뒤쪽 양측에 구비된 양 측부 방압구에 접속되게 하면서 상기 하부 케이블실에도 접속되게 하여 만듦으로써 상기 과제를 해결할 수 있다.Lower pressure passages for pressure-reducing the lower cable chamber are separated from the upper cable chamber so that compartment spaces provided at both sides of the upper cable chamber are connected to both side pressure-reducing holes provided at both sides of the ceiling behind the upper cable chamber. The problem can be solved by making it connected to the lower cable chamber.
본 발명은, 상기와 같은 과제해결수단에 의해, 기존 크기와 동일한 함체 내에 2개의 피더를 적층시키면서도, 각 차단기 마다에 제어수단을 별개로 만들어서 별도의 격실에 내장되게 하여, 고압회로가 활선인 상태에서도 제어회로를 유지 보수할 수 있도록 하고, 아울러 상하부 차단기실, 모선실, 및 상하부 케이블실에 방압통로를 별개로 제공하는 것을 가능하게 하여, 사고 여파가 이웃한 배전반에 전달되지 않게 하며, 유지보수비용과 제조비용이 절감되게 할 수 있는 금속 폐쇄형 스위치기어를 제공할 수 있다. The present invention, by the above problem solving means, while stacking the two feeders in the same size as the existing size, separate control means for each breaker to be embedded in a separate compartment, the high-voltage circuit is live state In addition, it is possible to maintain the control circuit at the same time, and to provide a separate pressure discharge path to the upper and lower breaker rooms, the mother room, and the upper and lower cable rooms, so that the aftermath of the accident is not transmitted to the neighboring switchboard. Metal closed switchgear can be provided that can reduce maintenance and manufacturing costs.
도 1은 본 발명에 따른 실시예의 투영 정면도,1 is a projection front view of an embodiment according to the invention,
도 2는 도 1의 평면도, 및2 is a plan view of FIG. 1, and
도 3은 도 1에서 배선구조를 제외하고 함체의 격실들과 방압통로들을 도시하한 개념 사시도.FIG. 3 is a conceptual perspective view illustrating compartments and pressure discharge passages of an enclosure except for a wiring structure in FIG. 1; FIG.
이하, 본 발명에 따른 실시예의 금속폐쇄형 스위치기어가 도 1 내지 도 3을 참조하여 상세히 설명될 것이다.Hereinafter, the metal closed switch gear of the embodiment according to the present invention will be described in detail with reference to FIGS.
도 1에는 본 실시예의 금속폐쇄형 스위치기어가 부호 100으로서 지시되어 있다.In Fig. 1, the closed metal switchgear of this embodiment is indicated by the reference numeral 100.
상기 금속폐쇄형 스위치기어(100)는, 함체(1) 내에 종래와 같이 차단기, 제어수단, 모선, 및 케이블을 내장하고 있다. The metal closed switch gear 100 has a circuit breaker, a control means, a bus bar, and a cable as in the conventional case.
하지만, 상기 금속폐쇄형 스위치기어(100)에는, 종래와 달리, 도 1 내지 도 3에 도시된 바와 같이, 상기 함체(1) 내의 앞쪽 상부공간에 배치된 육면체의 상부 차단기실(10), 상기 함체(1) 내의 앞쪽 하부공간에 배치된 육면체의 하부 차단기실(20), 상기 상부 차단기실(10)과 상기 하부 차단기실(20) 뒤쪽의 상기 함체(1) 중앙공간에 배치된 모선실(30), 상기 상부 차단기실(10)과 마주하는 상기 함체(1) 내의 뒤쪽 상부공간에 배치된 ㄱ자 단면형의 상부 케이블실(40), 및 상기 하부 차단기실(20)과 마주하는 함체 내의 뒤쪽 하부공간에 배치된 ㄴ자 단면형의 하부 케이블실(50)이, 복수개의 칸막이 벽부에 의해 격실로서 구획되어 상기 함체(1) 내에 마련되어 있다. However, unlike the prior art, as shown in FIGS. 1 to 3, the metal closed switch gear 100 includes an upper breaker chamber 10 of a hexahedron disposed in an upper upper space in the enclosure 1, and The lower breaker chamber 20 of the hexahedron disposed in the lower front space in the enclosure 1, the bus bar chamber disposed in the central space of the enclosure 1 behind the upper breaker chamber 10 and the lower breaker chamber 20 ( 30) an upper cable chamber 40 having an A cross-sectional shape disposed in a rear upper space in the enclosure 1 facing the upper breaker chamber 10, and a rear side in the enclosure facing the lower breaker chamber 20; The lower cable chamber 50 having a N-shaped cross section disposed in the lower space is partitioned as a compartment by a plurality of partition wall portions and provided in the enclosure 1.
상기 상부 차단기실(10)은 2개의 격실(11, 12)로 만들어져서 ㄱ자 단면형의 하나의 격실(11)에는 차단기가 내장되어 있고, 육면체의 다른 하나의 격실(12)에는 제어수단이 내장되어 있다. 상기 2개의 격실(11, 12) 각각에는 도어(A, B)가 개폐가능하게 장착되어 있다. The upper breaker chamber 10 is made of two compartments 11 and 12 so that one compartment 11 having a cross-sectional shape is a built-in circuit breaker, and the other compartment 12 of the hexahedron has a control means built therein. It is. In each of the two compartments 11 and 12, doors A and B are mounted so as to be openable and openable.
상기 하부 차단기실(20)은 상기 상부 차단기실(10)과 동일한 방식으로 2개의 격실로 만들어져서 ㄱ자 단면형의 하나의 격실(21)에는 차단기가 내장되어 있고 육면체의 다른 하나의 격실(22)에는 제어수단이 내장되어 있다. 상기 2개의 격실(21, 22) 각각에는 도어(C, D)가 개폐가능하게 장착되어 있다. The lower circuit breaker chamber 20 is made of two compartments in the same manner as the upper circuit breaker chamber 10 so that one compartment 21 having a cross-sectional shape of the letter “A” has a built-in circuit breaker and the other compartment 22 of the hexahedron. The control unit is built in. Doors C and D are mounted in the two compartments 21 and 22 so as to be openable and openable.
상기 상부 차단기실(10)의 상기 하나의 격실(11)을 방압시키기 위한 상부차단기실방압통로(13)는, 상기 상부 차단기실(10)의 상기 하나의 격실(11)의 공간 자체가 상기 상부 차단기실(10)의 하나의 격실(11)의 함체 천장 중앙에 구비된 중앙 차단기실 방압구(14)에 유통가능하게 접속되게 하여 만들어져 있다. The upper breaker chamber pressure relief passage 13 for pressure-releasing the one compartment 11 of the upper breaker chamber 10 is the space itself of the one compartment 11 of the upper breaker chamber 10. It is made to be circulated to be connected to the central breaker chamber pressure-pressure port 14 provided in the center of the enclosure ceiling of one compartment 11 of the upper breaker chamber 10.
상기 하부 차단기실(20)의 상기 하나의 격실(21)을 방압시키기 위한 하부차단기실방압통로(23)는, 상기 상부 차단기실(20)의 상기 하나의 격실(21)과 격리되어 상기 상부 차단기실(10)의 상기 하나의 격실(11) 내의 양측부에 함체(1)의 양 측벽과 협력하여 연직방향으로 뻗어 마련된 격실공간이 상기 상부 차단기실(10)의 상기 하나의 격실(11)의 함체천장 양측에 구비된 양 측부 차단기실 방압구(24)에 유통가능하게 접속되게 하면서 상기 하부 차단실(20)의 상기 하나의 격실(21)에도 유통가능하게 접속되게 하여 만들어져 있다.The lower breaker chamber pressure passage 23 for pressure release of the one compartment 21 of the lower breaker chamber 20 is isolated from the one compartment 21 of the upper breaker chamber 20 in the upper part. Compartment spaces extending in the vertical direction in cooperation with both side walls of the enclosure 1 on both sides of the one compartment 11 of the breaker chamber 10 are the one compartment 11 of the upper breaker chamber 10. It is made to be circulatingly connected to the one compartment 21 of the lower shut-off chamber 20, while being circulated to be connected to both side breaker chamber pressure-pressure port 24 provided on both sides of the ceiling.
상기 모선실(30)을 방압시키기 위한 모선실방압통로(33)는, 상기 상부 케이블실(40)과 격리되어 상기 상부 케이블실 앞쪽 양측부에 함체(1)의 양 측벽과 협력하여 연직방향으로 뻗어 마련된 격실공간이 상기 상부 케이블실(40)의 함체천장 앞쪽 양측에 구비된 양 측부 모선실 방압구(34)에 유통가능하게 접속되게 하면서 상기 모선실(30)에도 유통가능하게 접속되게 하여 만들어져 있다.The busbar chamber pressure passage 33 for evacuating the busbar chamber 30 is isolated from the upper cable chamber 40 and cooperates with both sidewalls of the enclosure 1 at both sides in front of the upper cable chamber in the vertical direction. Compartment space is formed to be connected to the bus compartment 30, while being distributed so as to be circulated to both sides of the mother bus chamber pressure outlet 34 provided on both sides in front of the enclosure ceiling of the upper cable chamber (40). have.
상기 상부 케이블실(40)을 방압시키기 위한 상부케이블실방압통로(43)는, 상기 상부 케이블실(40)의 공간 자체가 상기 상부 케이블실(40)의 함체천장 뒤쪽 중앙에 구비된 중앙 케이블실방압구(44)에 유통가능하게 접속되게 하여 만들어져 있다.The upper cable room pressure passage 43 for pressure-limiting the upper cable room 40 is a central cable room where the space itself of the upper cable room 40 is provided at the center of the rear of the ceiling of the upper cable room 40. It is made to connect to the pressure port 44 so that distribution is possible.
상기 하부 케이블실(50)을 방압시키기 위한 하부케이블실방압통로(53)는, 상기 상부 케이블실(40)과 격리되어 상기 상부 케이블실(40) 내의 양측부에 함체(1)의 양 측벽과 협력하여 연직방향으로 뻗어 마련된 격실공간이 상기 상부 케이블실(40)의 함체천장 뒤쪽 양측에 구비된 양 측부 케이블실 방압구(54)에 유통가능하게 접속되게 하면서 상기 하부 케이블실(50)에도 유통가능하게 접속되게 하여 만들어져 있다.The lower cable chamber pressure passage 53 for evacuating the lower cable chamber 50 is isolated from the upper cable chamber 40 and is provided on both side walls of the enclosure 1 at both sides of the upper cable chamber 40. The compartment space, which extends in cooperation in the vertical direction, is circulated to the lower cable chamber 50 while being connected to the cable chamber pressure outlets 54 provided at both sides of the upper side of the ceiling of the upper cable chamber 40. It is made to be connected as possible.
또한, 상기 금속폐쇄형 스위치기어(100)는, 도 1에 도시된 바와 같이, 상기 중앙 차단기실 방압구(14), 상기 양 측부 차단기실 방압구(24) 및 상기 양 측부 모선실 방압구(34)를 에워싸서 함체(1)의 폭방향 양방향으로 개구되어 상기 함체(1)의 천장에 고정되어서, 이들 방압구들 중 적어도 어느 하나가 개방될 시에 해당하는 상부차단기실(10), 하부차단기실(20) 또는 모선실(30)의 팽창공기를 외부에 방출하게 하는 제1덕트(15); 및 상기 양 측부 케이블 방압구(54)를 에워싸서 함체(1)의 폭방향 양방향으로 개구되어 상기 함체(1)의 천장에 고정되어서, 이들 방압구들 중 적어도 어느 하나가 개방될 시에 상부케이블실(40) 또는 하부케이블실(50)의 팽창공기를 외부에 방출하게 하는 제2덕트(55)를 포함하고 있다.In addition, the metal-closed switch gear 100, as shown in Figure 1, the central breaker chamber pressure release port 14, the both side breaker chamber pressure release port 24 and the both side bus chamber pressure release port ( 34 is enclosed in the width direction of the enclosure 1 and fixed to the ceiling of the enclosure 1, so that at least any one of these pressure-release openings corresponding to the upper breaker chamber 10, the lower block A first duct 15 for discharging the expansion air of the air chamber 20 or the mother chamber 30 to the outside; And enclosing the both side cable pressure relief holes 54 so as to be opened in the width direction in both directions of the enclosure 1 and fixed to the ceiling of the enclosure 1 so that at least one of these pressure relief holes is opened. A second duct 55 for discharging the expanded air of the 40 or lower cable chamber 50 to the outside is included.
상기와 같이 구성된 금속폐쇄형 스위치기어(100)에서는, 상기 상부차단기실(10)의 상기 하나의 격실(11)에서 차단기의 아크 사고에 의해 팽창공기가 발생하면, 상기 팽창공기의 압력에 의해 상기 중앙 차단기실 방압구(14)가 개방되어서, 상기 팽창공기가 상기 상부차단기실방압통로(13)를 경유하여 제1덕트(15)를 통하여 함체(1) 외부로 방출되게 하고; In the closed metal switchgear 100 configured as described above, when expansion air is generated by an arc accident of the breaker in the one compartment 11 of the upper breaker chamber 10, A central breaker chamber pressure relief port (14) is opened such that the expansion air is discharged out of the enclosure (1) through the first duct (15) via the upper circuit breaker chamber pressure passage (13);
상기 하부차단기실(20)의 상기 하나의 격실(21)에서 차단기 아크 사고에 의해 팽창공기가 발생하면, 상기 팽창공기의 압력에 의해 상기 양 측부 차단기실 방압구(24)가 개방되어서, 상기 팽창공기가 상기 하부차단기실방압통로(23)를 경유하여 제1덕트(15)를 통하여 함체(1) 외부로 방출되게 하고;When expansion air is generated by the breaker arc accident in the one compartment 21 of the lower circuit breaker chamber 20, the both side breaker chamber pressure release holes 24 are opened by the pressure of the expansion air, thereby expanding the expansion. Allowing air to be discharged out of the enclosure (1) through the first duct (15) via the lower breaker chamber pressure passage (23);
모선실(30)에서 모선 아크 사고에 의해 팽창공기가 발생하면, 상기 팽창공기의 압력에 의해 상기 양 측부 모선실 방압구(34)가 개방되어서, 상기 팽창공기가 상기 모선실방압통로(33)를 경유하여 제1덕트(15)를 통하여 함체(1) 외부로 방출되게 하고;When expansion air is generated in the bus chamber 30 by a bus arc accident, both side bus chamber pressure discharge holes 34 are opened by the pressure of the expansion air, so that the expansion air passes through the bus chamber pressure passage 33. Through the first duct 15 to be released to the outside of the enclosure (1);
상기 상부케이블실(40)에서 케이블의 아크 사고에 의해 팽창공기가 발생하면, 상기 팽창공기의 압력에 의해 상기 중앙 케이블실방압구(44)가 개방되어서, 상기 팽창공기가 상기 상부케이블실방압통로(43)를 경유하여 제2덕트(55)를 통하여 함체(1) 외부로 방출되게 하고; 그리고When expansion air is generated in the upper cable chamber 40 due to an arc accident of the cable, the central cable chamber pressure port 44 is opened by the pressure of the expansion air, so that the expansion air is the upper cable chamber pressure passage ( To the outside of the enclosure 1 via the second duct 55 via 43); And
상기 하부케이블실(50)에서 케이블 아크 사고에 의해 팽창공기가 발생하면, 상기 팽창공기의 압력에 의해 상기 양 측부 케이블실 방압구(54)가 개방되어서, 상기 팽창공기가 상기 하부케이블실방압통로(53)를 경유하여 제2덕트(55)를 통하여 함체(1) 외부로 방출되게 한다.When expansion air is generated in the lower cable chamber 50 due to a cable arc accident, both side cable chamber pressure release holes 54 are opened by the pressure of the expansion air, so that the expansion air is the lower cable chamber pressure passage. Via 53 is discharged to the outside of the enclosure 1 through the second duct (55).
따라서, 상기 금속폐쇄형 스위치기어(100)는, 기존 크기와 동일한 함체 내에 2개의 피더를 적층시키면서도, 각 차단기 마다에 제어수단을 별개로 만들어서 별도의 격실에 내장되게 하여, 고압회로가 활선인 상태에서도 제어회로를 유지 보수할 수 있도록 하고, 아울러 상하부 차단기실, 모선실, 및 상하부 케이블실에 방압통로를 별개로 제공하는 것을 가능하게 하여, 사고 여파가 이웃한 배전반에 전달되지 않게 하며, 유지보수비용과 제조비용이 절감되게 할 수 있다.Therefore, the metal-closed switch gear 100, while stacking the two feeders in the same enclosure as the existing size, by making a separate control means for each breaker to be embedded in a separate compartment, the high-voltage circuit is live state In addition, it is possible to maintain the control circuit at the same time, and to provide a separate pressure discharge path to the upper and lower breaker rooms, the mother room, and the upper and lower cable rooms, so that the aftermath of the accident is not transmitted to the neighboring switchboard. Maintenance costs and manufacturing costs can be reduced.

Claims (3)

  1. 함체(1) 내에 차단기, 제어수단, 모선, 및 케이블을 내장하고 있는 금속폐쇄형 스위치기어에 있어서,In the metal closed type switchgear which has a circuit breaker, a control means, a bus bar, and a cable in the enclosure 1,
    상기 함체(1) 내의 앞쪽 상부공간에 배치된 육면체의 상부 차단기실(10), 상기 함체(1) 내의 앞쪽 하부공간에 배치된 육면체의 하부 차단기실(20), 상기 상부 차단기실(10)과 상기 하부 차단기실(20) 뒤쪽의 상기 함체(1) 중앙공간에 배치된 모선실(30), 상기 상부 차단기실(10)과 마주하는 상기 함체(1) 내의 뒤쪽 상부공간에 배치된 ㄱ자 단면형의 상부 케이블실(40), 및 상기 하부 차단기실(20)과 마주하는 함체 내의 뒤쪽 하부공간에 배치된 ㄴ자 단면형의 하부 케이블실(50)이, 복수개의 칸막이 벽부에 의해 격실로서 상기 함체(1) 내에 마련되어 있고,The upper breaker chamber 10 of the hexahedron disposed in the upper upper space in the enclosure 1, the lower breaker chamber 20 of the hexahedron disposed in the lower front space of the enclosure 1, the upper breaker chamber 10 and Mothership chamber 30 disposed in the central space of the enclosure 1 behind the lower breaker chamber 20, and a cross-sectional shape of the letter U arranged in the rear upper space in the enclosure 1 facing the upper breaker chamber 10. The lower cable chamber 50 of the N-shaped cross section disposed in the rear lower space in the enclosure facing the lower breaker chamber 20 is formed as a compartment by a plurality of partition walls. 1) is provided within,
    상기 상부 차단기실(10)은 2개의 격실(11, 12)로 만들어져서 ㄱ자 단면형의 하나의 격실(11)에는 차단기가 내장되어 있고, 육면체의 다른 하나의 격실(12)에는 제어수단이 내장되어 있고, The upper breaker chamber 10 is made of two compartments 11 and 12 so that one compartment 11 having a cross-sectional shape is a built-in circuit breaker, and the other compartment 12 of the hexahedron has a control means built therein. It is,
    상기 하부 차단기실(20)은 상기 상부 차단기실(10)과 동일한 방식으로 2개의 격실로 만들어져서 ㄱ자 단면형의 하나의 격실(21)에는 차단기가 내장되어 있고 육면체의 다른 하나의 격실(22)에는 제어수단이 내장되어 있고,The lower circuit breaker chamber 20 is made of two compartments in the same manner as the upper circuit breaker chamber 10 so that one compartment 21 having a cross-sectional shape of the letter “A” has a built-in circuit breaker and the other compartment 22 of the hexahedron. Has built-in control means,
    상기 상부 차단기실(10)의 상기 하나의 격실(11)을 방압시키기 위한 상부차단기실방압통로(13)는, 상기 상부 차단기실(10)의 상기 하나의 격실(11)의 공간 자체가 상기 상부 차단기실(10)의 하나의 격실(11)의 함체 천장 중앙에 구비된 중앙 차단기실 방압구(14)에 유통하게 접속되고,The upper breaker chamber pressure relief passage 13 for pressure-releasing the one compartment 11 of the upper breaker chamber 10 is the space itself of the one compartment 11 of the upper breaker chamber 10. Connected to the central circuit breaker chamber pressure outlet 14 provided in the center of the ceiling of the enclosure of one compartment 11 of the upper circuit breaker chamber 10,
    상기 하부 차단기실(20)의 상기 하나의 격실(21)을 방압시키기 위한 하부차단기실방압통로(23)는, 상기 상부 차단기실(20)의 상기 하나의 격실(21)과 격리되어 상기 상부 차단기실(10)의 상기 하나의 격실(11) 내의 양측부에 함체(1)의 양 측벽과 협력하여 연직방향으로 뻗어 마련된 격실공간이 상기 상부 차단기실(10)의 상기 하나의 격실(11)의 함체천장 양측에 구비된 양 측부 차단기실 방압구(24)에 유통가능하게 접속되면서 상기 하부 차단실(20)의 상기 하나의 격실(21)에도 유통하게 접속되고,The lower breaker chamber pressure passage 23 for pressure release of the one compartment 21 of the lower breaker chamber 20 is isolated from the one compartment 21 of the upper breaker chamber 20 in the upper part. Compartment spaces extending in the vertical direction in cooperation with both side walls of the enclosure 1 on both sides of the one compartment 11 of the breaker chamber 10 are the one compartment 11 of the upper breaker chamber 10. It is connected to the one compartment 21 of the lower shut-off chamber 20 while being circulated to the both side breaker chamber pressure outlet 24 provided on both sides of the ceiling of the enclosure,
    상기 모선실(30)을 방압시키기 위한 모선실방압통로(33)는, 상기 상부 케이블실(40)과 격리되어 상기 상부 케이블실 앞쪽 양측부에 함체(1)의 양 측벽과 협력하여 연직방향으로 뻗어 마련된 격실공간이 상기 상부 케이블실(40)의 함체천장 앞쪽 양측에 구비된 양 측부 모선실 방압구(34)에 유통하게 접속되면서 상기 모선실(30)에도 유통하게 접속되고,The busbar chamber pressure passage 33 for evacuating the busbar chamber 30 is isolated from the upper cable chamber 40 and cooperates with both sidewalls of the enclosure 1 at both sides in front of the upper cable chamber in the vertical direction. An extended compartment space is connected to the bus compartment 30 while being connected to both sides of the busbar chamber pressure outlet 34 provided on both sides in front of the ceiling of the upper cable chamber 40.
    상기 상부 케이블실(40)을 방압시키기 위한 상부케이블실방압통로(43)는, 상기 상부 케이블실(40)의 공간 자체가 상기 상부 케이블실(40)의 함체천장 뒤쪽 중앙에 구비된 중앙 케이블실방압구(44)에 유통하게 접속되고,The upper cable room pressure passage 43 for pressure-limiting the upper cable room 40 is a central cable room where the space itself of the upper cable room 40 is provided at the center of the rear of the ceiling of the upper cable room 40. Connected to the pressure port 44,
    상기 하부 케이블실(50)을 방압시키기 위한 하부케이블실방압통로(53)는, 상기 상부 케이블실(40)과 격리되어 상기 상부 케이블실(40) 내의 양측부에 함체(1)의 양 측벽과 협력하여 연직방향으로 뻗어 마련된 격실공간이 상기 상부 케이블실(40)의 함체천장 뒤쪽 양측에 구비된 양 측부 케이블실 방압구(54)에 유통하게 접속되면서 상기 하부 케이블실(50)에도 유통하게 접속되어 있는 것을 특징으로 하는 금속폐쇄형 스위치기어.The lower cable chamber pressure passage 53 for evacuating the lower cable chamber 50 is isolated from the upper cable chamber 40 and is provided on both side walls of the enclosure 1 at both sides of the upper cable chamber 40. Compartment spaces which extend in the vertical direction in cooperation with each other are circulated in circulation to both cable chamber pressure outlets 54 provided on both sides behind the ceiling of the upper cable chamber 40, and are also connected to the lower cable chamber 50. Metal closed switchgear, characterized in that.
  2. 제 1항에 있어서,The method of claim 1,
    상기 2개의 격실(11, 12) 각각에는 도어(A, B, C, D)가 개폐가능하게 장착되어 있는 것을 특징으로 하는 금속폐쇄형 스위치기어. Each of the two compartments (11, 12) is a metal closed switchgear, characterized in that the door (A, B, C, D) is mounted to open and close.
  3. 제 1항 또는 제 2항에 있어서,The method according to claim 1 or 2,
    상기 중앙 차단기실 방압구(14), 상기 양 측부 차단기실 방압구(24) 및 상기 양 측부 모선실 방압구(34)를 에워싸서 함체(1)의 폭방향 양방향으로 개구되어 상기 함체(1)의 천장에 고정되어서, 이들 방압구들 중 적어도 어느 하나가 개방될 시에 해당하는 상부차단기실(10), 하부차단기실(20) 또는 모선실(30)의 팽창공기를 외부에 방출하게 하는 제1덕트(15); 및 The center breaker chamber pressure release port 14, the both side breaker chamber pressure release holes 24, and the both side busbar chamber pressure discharge holes 34 are enclosed and are opened in both directions in the width direction of the enclosure 1 to the enclosure 1. It is fixed to the ceiling of the first, so that at least any one of these pressure-sensitive openings to release the expansion air of the upper breaker chamber 10, the lower breaker chamber 20 or the mother bus chamber 30 to the outside Duct 15; And
    상기 양 측부 케이블실 방압구(54)를 에워싸서 함체(1)의 폭방향 양방향으로 개구되어 상기 함체(1)의 천장에 고정되어서, 이들 방압구들 중 적어도 어느 하나가 개방될 시에 상부케이블실(40) 또는 하부케이블실(50)의 팽창공기를 외부에 방출하게 하는 제2덕트(55)를 포함하는 것을 특징으로 하는 금속폐쇄형 스위치기어.The upper cable chamber is formed when the at least one of these pressure chambers is opened by enclosing the both side cable chamber pressure outlets 54 and opening in both directions in the width direction of the enclosure 1 to be fixed to the ceiling of the enclosure 1. (40) or a metal closed switch gear comprising a second duct (55) for discharging the expansion air of the lower cable chamber (50) to the outside.
PCT/KR2015/013445 2015-12-07 2015-12-09 Metal-closed type switchgear WO2017099271A1 (en)

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