CN101714447A

CN101714447A - A transformer for gas insulation instrument

Info

Publication number: CN101714447A
Application number: CN200910135493A
Authority: CN
Inventors: 阿部秀一郎; 青柳雅人
Original assignee: Nissin Electric Co Ltd
Current assignee: Nissin Electric Co Ltd
Priority date: 2008-09-29
Filing date: 2009-04-30
Publication date: 2010-05-26
Also published as: JP2010087045A

Abstract

The invention discloses a gas VT with simple circuit breaking device that connected with or separated from a high-voltage circuit, which needs bigger power when making displacement, and leads to large size of the gat VT having simple circuit breaking device. The invention aims at solving the problem, and provides a transformer for gas insulation instrument, which comprises a high pressure terminal (31) that connected with high pressure conductor of single phase AC; a voltage transformation element (41) that deployed on the same shaft with the high pressure terminal (31); a connecting conductor (32) that connected with the voltage transformation element (41) and is deployed on the high pressure terminal (31) to move in relative direction; and a drive part (40) that makes the connecting conductor (32) move to relative direction relative to the high pressure terminal (31), and makes the connecting conductor (32) contact or depart relative to the high pressure terminal (31).

Description

Transformer for gas insulation instrument

Technical field

The present invention relates to a kind of transformer for gas insulation instrument.

Background technology

Transformer for gas insulation instrument (hereinafter referred to as " gas VT ") is connected with gas-insulated switchgear device (hereinafter referred to as " GIS ") and carries out the voltage transformation of high-tension circuit, and at the direct current of GIS and when exchanging withstand voltage test etc., need cut off from high-tension circuit.

Gas VT is installed in GIS and go up uses, and under the state that gas VT is installed on the GIS, if carry out the AC withstand voltage test of GIS, then has the magnetic saturation unshakable in one's determination of gas VT and the danger of scaling loss primary coil.Therefore, need circuit breaker be set in the GIS side and cut off gas VT with in the AC of GIS withstand voltage test the time, even perhaps increase the iron core of gas VT so that apply the AC proof voltage at the trial, iron core can magnetic saturation yet.

Can cause cost to rise but circuit breaker is set among the GIS, in gas VT, do not adopt and can cause gas VT to increase by magnetically saturated iron core, thereby GIS self increase and the cost of VT self rises.Therefore, motion have a gas VT (following patent documentation 1) of simple and easy tripper.

Below utilize Fig. 5 that the gas VT with simple and easy tripper of motion is described.Fig. 5 is the end view of internal structure that expression has the gas VT of simple and easy tripper.In container 101, be filled with insulating gas, and airtight by insulating spacer 112, container cover 110 etc.On the end of the high-pressure conductor 102 in importing to container 101 HV Terminal 103 is set, and with the bonding conductor 104 relative configurations of the end, high-pressure side of voltage transformation key element 111.

Voltage transformation key element 111 is made of primary coil 105, secondary coil 106 and unshakable in one's determination 107.Therefore as mentioned above, voltage transformation key element 111 and high-pressure conductor 102 relative configurations are undertaken and being connected or leaving of high-pressure conductor 102 by mobile bonding conductor 104 and voltage transformation key element 111 on the long side direction of container 101.Movable platen 109 is connected with voltage transformation key element 111.The operating means 113 that is connected with movable platen 109 in order to move the voltage transformation key element 111 be connected with movable platen 109, and has power sources such as Poewr transmission mechanism, motor such as gear.And operating means 113 is by mobile movable platen 109 on long side direction, and bonding conductor 104 is connected with HV Terminal 103 or leaves.

But above-mentioned have the gas VT of simple and easy tripper in order to make heavier voltage transformation key element connection or to leave and the bigger action force of needs.In addition, when the voltage of high-tension circuit uprised, the voltage transformation key element also can maximize along with this voltage, so necessary operation power becomes big.Therefore, in order to generate bigger action force, operating means 113 more maximizes and weightization.

Patent documentation 1:JP spy opens the 2004-55740 communique

Summary of the invention

The object of the present invention is to provide a kind of gas VT with simple and easy tripper that can make the voltage transformation key element be connected with high-tension circuit or leave with less action force.

In order to address the above problem, the invention provides a kind of transformer for gas insulation instrument, it comprises: HV Terminal is connected with the high-pressure conductor of single phase alternating current (A.C.); The voltage transformation key element is configured on the same axle with above-mentioned HV Terminal; Bonding conductor is connected with above-mentioned voltage transformation key element, is configured on the above-mentioned HV Terminal and can moves to relative direction; And drive division, above-mentioned bonding conductor is moved to relative direction with respect to above-mentioned HV Terminal, and make above-mentioned bonding conductor contact or leave with respect to above-mentioned HV Terminal.

Above-mentioned gas insulation instrument transformer can be with less action force, the voltage transformation key element is connected with high-tension circuit or leaves.

Description of drawings

Fig. 1 is the cutaway view of an example of the internal structure of the gas VT of explanation with simple and easy tripper.

Fig. 2 is the figure of an example that is connected and leaves of explanation bonding conductor and HV Terminal.

Fig. 3 is the cutaway view of an example of explanation drive division.

Fig. 4 is the existing cutaway view with gas VT of simple and easy tripper of explanation, and this simple and easy tripper has the simple and easy portion that opens circuit.

Embodiment

Following with reference to Fig. 1～3 explanations execution mode with gas VT of simple and easy tripper of the present invention.

Utilize Fig. 1 to illustrate to have the example of internal structure of the gas VT 20 of simple and easy tripper.Fig. 1 (a) expression bonding conductor and HV Terminal state connected to one another (hereinafter referred to as " on-state "), the state (hereinafter referred to as " off-state ") that Fig. 1 (b) expression bonding conductor 32 and HV Terminal 31 are left.

Gas VT 20 with simple and easy tripper comprises that primary coil 21, secondary coil 22, electric field

relax guard shield

23,33, unshakable in one's determination 24, standing finish unshakable in one's determination 25, container floor 26, container 27, insulating spacer 28, GIS and connect with conductor 28a, mounting flange 29, high-pressure conductor 30, HV Terminal 31, bonding conductor 32, insulation hook stick 34, rotary manipulation rod 35, mounting panel 36, rotary mechanism part 37, and operating grip 38 as shown in the figure.Gas VT 20 with simple and easy tripper combines with GIS via mounting flange 29, and high-pressure conductor 30 connects via GIS uses conductor 28a to be electrically connected with the single-phase high voltage circuit.Insulation hook stick 34, rotary manipulation rod 35, mounting panel 36, rotary mechanism part 37, operating grip 38 constitute drive division 40, with lifting bonding conductor 32.In addition, drive division 40 is arranged on the sidepiece of the gas VT 20 with simple and easy tripper as shown in the figure.Voltage transformation key element 41 constitutes, coiling secondary coil 22 on unshakable in one's determination 24, and further at its outside coiling primary coil 21.In addition as shown in the figure, voltage transformation key element 41 is configured on the same axle with HV Terminal 31 and bonding conductor 32.

High-pressure conductor 30 is connected with insulating spacer 28, insulating spacer 28 be filled with SF ₆ Container 27 Deng insulating gas is tightly connected.In container 27, HV Terminal 31 is installed at the front end of high-pressure conductor 30.Be provided with spring (omitting diagram) in HV Terminal 31 in inside, HV Terminal 31 moves to the long side direction of container 27, and the power by its spring keeps the contact pressure between HV Terminal 31 and the bonding conductor 32 that is connected.

Primary coil 21 is electrically connected with bonding conductor 32 via the electric wire 39 (aftermentioned) with surplus length.Therefore, the magnetic flux change by being produced in unshakable in one's determination 24 by the high-tension current that flows in primary coil 21 produces induced electromotive force in secondary coil 22.So, the high voltage of primary coil 21 in secondary coil 22 by transformation.

Standing finish 25 unshakable in one's determination is fixed on iron core 24 on the container floor 26.Rotary mechanism part 37 via the rotary manipulation rod 35 that is fixed on by mounting panel 36 on the container 27, is transmitted the actuating force that the spinning movement by operating grip 38 produces to insulation hook stick 34, thereby can lifting insulation hook stick 34.Bonding conductor 32 is fixed on the insulation hook stick 34, with lifting action one lifting of insulation hook stick 34.

Utilize Fig. 2 that an example that is connected and leaves of bonding conductor 32 and HV Terminal 31 is described.Bonding conductor 32 shown in Fig. 2 (a) and HV Terminal 31 expression on-states.Bonding conductor 32 shown in Fig. 2 (b) and HV Terminal 31 expression off-states.

Under the on-state shown in Fig. 2 (a), bonding conductor 32 be configured to HV Terminal 31 under contact.By on-state, high-pressure conductor 30 reaches and bonding conductor 32 wire connecting 39 by HV Terminal 31, bonding conductor 32, and is connected with voltage transformation key element 41.

Under the off-state shown in Fig. 2 (b), bonding conductor 32 is configured to leave under HV Terminal.As shown in the figure, electric wire 39 has sufficient flexibility and movable range being connected and leaving, and therefore can carry out moving up and down of bonding conductor 32.Under this external off-state, bonding conductor 32 leaves with respect to HV Terminal 31, till the suitable air gap g that keeps the state of insulation shown in Fig. 2 (b).

In addition, electric wire 39 also can be the spring shape in order to realize above-mentioned flexibility and movable range.

Thus, transportable bonding conductor 32 carries out lifting action by drive division 40 and connects or leave with respect to HV Terminal 31, and the function as simple and easy tripper is provided.

Utilize Fig. 3 that one example of drive division is described.

During rotating operation handle 38, by

rotary mechanism part

37,35 rotations of rotary manipulation rod.In addition, rotary mechanism part 37 utilizes the inner gear box that has (omitting diagram), bevel gear (omitting diagram), angular gear (omitting diagram) etc. will transform to the rotating shaft direction from the rotary power of operating grip 38, thereby makes 35 rotations of rotary manipulation rod.

Has screw thread with the screw thread combination of rotary manipulation rod 35 on the hook stick 34 in insulation.Therefore, during 35 rotations of rotary manipulation rod, 34 liftings of insulation hook stick, the bonding conductor 32 that is connected with insulation hook stick 34 is connected or separates with HV Terminal 31.

In addition, operating grip 38 preferably only is inserted in the rotary mechanism part 37 when operation for avoiding purpose such as misoperation.

Rotary mechanism part 37 can be by being provided with actuating unit such as motor (omitting diagram), thereby do not utilize the manual operation of operating grip 38, but carry out the connection of bonding conductor 32 or leave by automatic operation.At this moment, setting operation panel on rotary mechanism part 37, carry out the action indication of on-state or off-state from guidance panel, the power supply terminal of power motor perhaps is set and is connected with at a distance monitor, and carry out the action indication of on-state or off-state from a distant place, thereby actuating unit makes 35 motions of rotary manipulation rod.In addition, actuating unit can followingly stop to handle automatically: the detecting sensor of current value, bonding conductor 32 or insulation hook stick 34 by power motor detects insulation hook stick 34 automatically to the connection of bonding conductor 32 and leave suitable position and stop.

As mentioned above, have the gas VT 20 of simple and easy tripper, can not change coil or position of centre of gravity unshakable in one's determination and, carry out opening circuit of high-pressure conductor and voltage transformation key element by mobile bonding conductor on long side direction.Therefore, high-pressure conductor and voltage transformation key element be connected or departure motion in, even ponderable voltage transformation key element, also can reduce to connect or departure motion need power.

In addition, the drive division that is used to carry out the lifting action of bonding conductor obtains simplifying, and be configured in the sidepiece of the gas VT with simple and easy tripper, therefore shortened the length of the long side direction of the gas VT with simple and easy tripper, made the big or small miniaturization of gas VT integral body with simple and easy tripper.Therefore, diminish as the moment of the long side direction distance of the deadweight * container of the gas VT with simple and easy short-circuiting means, GIS and the loading stress with the connecting portion between the gas VT of simple and easy tripper diminish, and can make the quantification in light weight of connecting portion.

Claims

1. a transformer for gas insulation instrument is characterized in that, comprising:

HV Terminal is connected with high-pressure conductor;

The voltage transformation key element is configured on the same axle with above-mentioned HV Terminal;

Bonding conductor is connected with above-mentioned voltage transformation key element, is configured on the above-mentioned HV Terminal and can moves to relative direction; With

Drive division makes above-mentioned bonding conductor move to relative direction with respect to above-mentioned HV Terminal, and above-mentioned bonding conductor is connected with respect to above-mentioned HV Terminal or leaves.

2. transformer for gas insulation instrument according to claim 1 is characterized in that,

Above-mentioned drive division is arranged on the sidepiece of above-mentioned gas insulation instrument transformer.