JP2005137147A

JP2005137147A - Switchgear

Info

Publication number: JP2005137147A
Application number: JP2003371712A
Authority: JP
Inventors: Makoto Sakano; 誠阪野
Original assignee: Toshiba Corp
Current assignee: Toshiba Corp
Priority date: 2003-10-31
Filing date: 2003-10-31
Publication date: 2005-05-26

Abstract

<P>PROBLEM TO BE SOLVED: To provide a switch gear that makes it possible to perform the laying work of cables and the like with no need of the mounting work of a current transformer or a zero-phase current transformer inside a narrow conductors room, and whose workability at the time of its assembly is improved. <P>SOLUTION: Three pieces of conductors that constitute contact terminals 21 for three phases are molded integrally with an insulating material 23. The current transformers 24 are each mounted to at least two pieces of these three conductors, and zero-phase current transformers 25 are mounted outside the converging portion of the three conductors converging via prescribed insulation distances with the insulating material 23. These current transformers 24 and zero-phase current transformers 25 are molded integrally in the insulating material 23. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、しゃ断器などの電気機器を引き出し可能に収容し、この電気機器の背面との対向部に、この電気機器の引き出し方向の移動により、その背面に設けられた一対の三相端子と接離する一対の三相分の接触端子を有するスイッチギヤに関する。 The present invention accommodates an electrical device such as a circuit breaker so that it can be pulled out, and a pair of three-phase terminals provided on the back surface of the electrical device facing the back surface of the electrical device by movement in the pulling direction of the electrical device. The present invention relates to a switchgear having a pair of contact terminals for three phases that come in contact with and separate from each other.

一般に、受配電設備における電路開閉用や、高圧負荷に対する電路開閉用として、しゃ断器などの電気機器を筐体内に収容したスイッチギヤが用いられている。このスイッチギヤとしては、収容される電気機器が小型化されたことにより、電気機器を複数段に収容するものが提案されている（例えば、特許文献１参照）。 In general, a switchgear in which an electric device such as a circuit breaker is housed in a casing is used for electric circuit switching in a power receiving and distribution facility or for electric circuit switching for a high voltage load. As this switch gear, what accommodates an electric equipment in multiple steps | paragraphs is proposed by having reduced the size of the electric equipment accommodated (for example, refer patent document 1).

このようなスイッチギヤでは、通常筐体内の前面側に電気機器を複数段に設置し、この電気機器に接続される導体やケーブルは、筐体内の後面側に形成される導体室内に配設される。上記導体やケーブルは、電気機器の収容段数に比例して多くなる。また、これら導体やケーブルには、電流値計測や保護に使用するための変流器や零相変流器が取り付けられる。 In such a switchgear, electric devices are usually installed in a plurality of stages on the front side in the housing, and conductors and cables connected to the electric devices are arranged in a conductor chamber formed on the rear surface side in the housing. The The number of conductors and cables increases in proportion to the number of accommodation stages of electrical equipment. In addition, a current transformer and a zero-phase current transformer for use in current value measurement and protection are attached to these conductors and cables.

通常変流器はケーブルに接続される導体を一次導体としており、また、零相変流器は、三相分３本のケーブルを収束し、これら３本のケーブルを、零相変流器を構成する環状の鉄心内側に貫通させて取り付けている。このため、変流器の取り付けに当っては、その一次導体とケーブルとの接続作業が必要であり、零相変流器の取り付けに当っては、三相分のケーブルを環状の鉄心内側に貫通させる必要がある。 Normally, current transformers use the primary conductor as the conductor connected to the cable, and the zero-phase current transformer converges three cables for three phases, and these three cables are connected to the zero-phase current transformer. It penetrates and is attached inside the annular iron core which constitutes. Therefore, when installing a current transformer, it is necessary to connect the primary conductor to the cable. When installing a zero-phase current transformer, the three-phase cable is placed inside the annular core. Need to penetrate.

これらの作業は、筐体内の、多数のケーブルや導体が配設された狭い導体室内にて行わなければならず、極めて作業性が悪かった。
特開２００１−１７７９２７号公報 These operations have to be performed in a narrow conductor chamber in which a large number of cables and conductors are arranged in the housing, and the workability is extremely poor.
JP 2001-177927 A

このように筐体内の、多数のケーブルや導体が配設された狭い導体室内において変流器や零相変流器の取り付け作業を行わなければならず、作業性が悪く、改善が望まれていた。 As described above, the current transformer and the zero-phase current transformer must be installed in a narrow conductor room in which a large number of cables and conductors are arranged in the housing, so that workability is poor and improvement is desired. It was.

本発明の目的は、狭い導体室内における変流器や零相変流器の取り付け作業を要することなくケーブルなどの配線作業を可能とし、組立時における作業性を改善したスイッチギヤを提供することにある。 An object of the present invention is to provide a switchgear that enables wiring work of cables and the like without requiring installation work of a current transformer or a zero-phase current transformer in a narrow conductor chamber, and improves workability during assembly. is there.

本発明のスイッチギヤは、電気機器を引き出し可能に収容し、この電気機器の背面との対向部に、この電気機器の引き出し方向の移動により、その背面に設けられた一対の三相端子と接離する一対の三相分の接触端子を有するスイッチギヤであって、前記三相分の接触端子を構成する３本の導体は、絶縁物により一体にモールドされており、これら３本の導体のうち少なくとも２本にはそれぞれ変流器が装着され、且つ前記絶縁物による所定の絶縁距離を介して収束された３本の導体の収束部外側には零相変流器が装着されており、これら変流器及び零相変流器は、前記絶縁物中に一体にモールドされていることを特徴とする。 The switch gear of the present invention accommodates an electric device so that the electric device can be pulled out, and is connected to a pair of three-phase terminals provided on the back surface of the electric device by moving the electric device in a pulling direction. A switchgear having a pair of contact terminals for three phases separated from each other, and three conductors constituting the contact terminals for the three phases are integrally molded by an insulator, and the three conductors A current transformer is attached to at least two of them, and a zero-phase current transformer is attached to the outside of the converging part of the three conductors converged through a predetermined insulation distance by the insulator, The current transformer and the zero-phase current transformer are integrally molded in the insulator.

本発明によれば、変流器や零相変流器が、電気機器との接続端子を構成する導体に取り付けられ、且つ絶縁物により一体にモールドされているので、スイッチギヤ組み立て時における狭い導体室での取り付け作業が無くなり、作業性が大幅に向上する。 According to the present invention, since the current transformer and the zero-phase current transformer are attached to the conductor constituting the connection terminal with the electric device and are integrally molded by the insulator, the narrow conductor at the time of assembling the switchgear Installation work in the room is eliminated and workability is greatly improved.

以下、本発明によるスイッチギヤの一実施の形態について図面を参照して詳細に説明する。 Hereinafter, an embodiment of a switchgear according to the present invention will be described in detail with reference to the drawings.

図１において、１１は接地金属による筐体で、仕切板１２により前後（図示左右）に仕切られており、その内部前面側（図示左側）には上下２段の機器室１３，１３及びそれらの間に位置する母線室１４がそれぞれ形成されている。また、内部後面側（図示右側）は、導体室１５となっている。 In FIG. 1, reference numeral 11 denotes a casing made of a ground metal, which is divided forward and backward (left and right in the figure) by a partition plate 12. Busbar chambers 14 are formed between them. Further, the inner rear surface side (the right side in the figure) is a conductor chamber 15.

上下２段の機器室１３，１３には、それぞれ側面形状がＬ字形をなす引き出しユニット１６が設けられ、しゃ断器などの電気機器１７を引き出し可能な状態で支持している。この引き出しユニット１６は、電気機器１７を引き出し方向（図示左右方向）に沿って移動可能に支持する水平部と、電気機器１７の背面（図示右面）と対向する垂直部とからなる。 The upper and lower two-stage equipment chambers 13 and 13 are each provided with a drawer unit 16 whose side shape is L-shaped, and supports an electrical equipment 17 such as a circuit breaker in a state where it can be pulled out. The drawer unit 16 includes a horizontal portion that supports the electric device 17 so as to be movable along the pull-out direction (left-right direction in the drawing), and a vertical portion that faces the back surface (right surface in the drawing) of the electric device 17.

この垂直部には上下一対の端子ユニット１８，１９が設けられている。これら端子ユニット１８，１９は、電気機器１７の引き出し方向の移動により、その背面に設けられた上下一対の三相端子１７ａ，１７ａと接離する三相分の接触端子２１，２２を有する。 A pair of upper and lower terminal units 18 and 19 are provided in the vertical portion. These terminal units 18, 19 have three-phase contact terminals 21, 22 that come in contact with and separate from a pair of upper and lower three-phase terminals 17 a, 17 a provided on the back surface of the electric device 17 in the pull-out direction.

このうち、一方の端子ユニット１８は、図２及び図３で示すように、三相分の接触端子２１を構成する３本の導体が、絶縁物２３により一体にモールドされている。また、これら３本の導体のうち少なくとも２本にはそれぞれ変流器２４が装着されている（すなわち、各導体が変流器２４の一次導体となっている）。さらに、三相分の接触端子２１を構成する３本の導体の一部は、絶縁物２３による所定の絶縁距離を介して図示のように収束されており、この３本の導体の収束部外側には零相変流器２５が装着されている（すなわち、３本の導体が、零相変流器２５を構成する環状の鉄心を貫通した状態となっている）。これら変流器２４及び零相変流器２５は、絶縁物２３中に、導体と共に一体にモールドされている。 Among these, as shown in FIGS. 2 and 3, in one terminal unit 18, three conductors constituting the contact terminals 21 for three phases are integrally molded with an insulator 23. Moreover, the current transformer 24 is attached to at least two of these three conductors (that is, each conductor is a primary conductor of the current transformer 24). Furthermore, a part of the three conductors constituting the contact terminals 21 for three phases are converged as shown in the figure via a predetermined insulation distance by the insulator 23, and the outside of the converging portion of the three conductors. Is equipped with a zero-phase current transformer 25 (that is, three conductors penetrate the annular iron core constituting the zero-phase current transformer 25). The current transformer 24 and the zero-phase current transformer 25 are molded integrally with the conductor in the insulator 23.

この端子ユニット１８の三相分の接触端子２１を構成する３本の導体の他端（図示右端）は、導体室１５内に達し、この導体室１５内にてケーブル２７と接続している。 The other end (right end in the figure) of the three conductors constituting the contact terminal 21 for three phases of the terminal unit 18 reaches the conductor chamber 15 and is connected to the cable 27 in the conductor chamber 15.

他方の端子ユニット１９は、上述した変流器２４や零相変流器２５を持たず、三相分の接触端子２２を構成する端子は、図示しないがそのまま絶縁物によりモールドされ、その他端（図示右端）は、導体室１５内に達し、母線室１４に設置された三相母線２８と、導体２９を介して接続している。 The other terminal unit 19 does not have the current transformer 24 or the zero-phase current transformer 25 described above, and the terminals constituting the three-phase contact terminals 22 are molded as is with an insulator, not shown, and the other ends ( The right end in the drawing reaches the inside of the conductor chamber 15, and is connected to the three-phase bus 28 installed in the bus chamber 14 via the conductor 29.

上記構成において、変流器２４及び零相変流器２５は、接触端子２１を構成する導体と共に絶縁物２３により一体にモールドされ、端子ユニット１８を構成している。そして、この端子ユニット１８を引き出しユニット１６の垂直部に取り付けているので、スイッチギヤ組み立て時に変流器２４や零相変流器２５の取り付け作業が不要となる。特に、狭い導体室１５内において、三相分のケーブルを零相変流器２５の環状鉄心に貫通させる作業がなくなるのでケーブル配線作業が容易になり、作業性が大幅に向上して、作業員に対する負担が大幅に軽減される。 In the above configuration, the current transformer 24 and the zero-phase current transformer 25 are molded integrally with the insulator 23 together with the conductor constituting the contact terminal 21 to constitute the terminal unit 18. And since this terminal unit 18 is attached to the vertical part of the drawer unit 16, the installation work of the current transformer 24 and the zero phase current transformer 25 becomes unnecessary at the time of switch gear assembly. In particular, in the narrow conductor chamber 15, since there is no work for passing the three-phase cable through the annular core of the zero-phase current transformer 25, the cable wiring work is facilitated and the workability is greatly improved. Is greatly reduced.

なお、端子ユニット１８において、零相変流器２５を変流器２４より電気機器１７寄りに配置したが、図４で示すようにこの位置関係を反対にしてもかまわない。 In the terminal unit 18, the zero-phase current transformer 25 is disposed closer to the electrical device 17 than the current transformer 24, but this positional relationship may be reversed as shown in FIG. 4.

本発明によるスイッチギヤの一実施の形態を示す側面構成図である。It is a side lineblock diagram showing one embodiment of a switchgear by the present invention. 同上一実施の形態に用いる端子ユニットの平面構成図である。It is a plane block diagram of the terminal unit used for one embodiment same as the above. 同上一実施の形態に用いる端子ユニットの側面構成図である。It is a side block diagram of the terminal unit used for one embodiment same as the above. 同上一実施の形態に用いる端子ユニットの他の平面構成図である。It is another plane block diagram of the terminal unit used for one embodiment same as the above.

Explanation of symbols

１７電気機器
１７ａ，１７ｂ端子
２１三相分の接触端子
２３絶縁物
２４変流器
２５零相変流器 17 Electrical equipment 17a, 17b Terminal 21 Three-phase contact terminal 23 Insulator 24 Current transformer 25 Zero-phase current transformer

Claims

A pair of three-phase components that house the electrical device so that it can be pulled out, and that are in contact with and separated from the pair of three-phase terminals provided on the back surface of the electrical device in a direction opposite to the back surface of the electrical device due to movement of the electrical device. A switchgear having a contact terminal of
The three conductors constituting the contact terminals for the three phases are integrally molded with an insulator, and at least two of the three conductors are each equipped with a current transformer, and the insulator A zero-phase current transformer is mounted outside the converging part of the three conductors converged through a predetermined insulation distance by
The switch gear, wherein the current transformer and the zero-phase current transformer are integrally molded in the insulator.