CN103348425A - Transformer for instruments - Google Patents
Transformer for instruments Download PDFInfo
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- CN103348425A CN103348425A CN2011800667452A CN201180066745A CN103348425A CN 103348425 A CN103348425 A CN 103348425A CN 2011800667452 A CN2011800667452 A CN 2011800667452A CN 201180066745 A CN201180066745 A CN 201180066745A CN 103348425 A CN103348425 A CN 103348425A
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- target
- ground shield
- phase
- center conductor
- axis direction
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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
- H02B13/035—Gas-insulated switchgear
- H02B13/0356—Mounting of monitoring devices, e.g. current transformers
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
- G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
- G01R15/16—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using capacitive devices
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
- H01F38/20—Instruments transformers
- H01F38/22—Instruments transformers for single phase ac
- H01F38/24—Voltage transformers
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Transformers For Measuring Instruments (AREA)
Abstract
Provided is a transformer for instruments, said transformer provided with: a metal adapter (3); cylindrically shaped intermediate electrodes (5a - 5c) that are attached to peripheral edge parts of hole parts (20a - 20c) in the metal adapter (3) via ring shaped insulator members (10) and that surround the periphery of center conductors (2a - 2c); substantially cylindrically shaped grounding shields (4a - 4c) each disposed so as to be adjacent to the respective intermediate electrode (5a - 5c) along the direction of an axial line; and an insulating sealed terminal mounted in a branching tube provided on the side surface of a metal container (1) and air tightly extracting lead wires connected to each of the intermediate electrodes (5a - 5c). The inside diameter of the intermediate electrodes (5a - 5c) is greater than the inside diameter of the respective grounding shields (4a - 4c).
Description
Technical field
The present invention relates to be applied to the meter transformer in the three-phase integrated type gas-insulated switchgear device.
Background technology
In the three-phase integrated type gas-insulated switchgear device, in having the canister of insulating gas, inclosure taken in three-phase conductor in the lump.Meter transformer is measured the voltage of each phase conductor.Be applied to the structure (for example, with reference to patent documentation 1 Fig. 8) of the target in the form of a ring that employing utilization that the meter transformer in the three-phase integrated type gas-insulated switchgear device has surrounds each phase conductor coaxially.In such structure, generally be easier to be subjected to the electric field influence of his phase conductor from the target of phase, thereby because the induced voltage of his phase makes evaluated error become big, thereby generally and be not suitable for the situation of the certainty of measurement of having relatively high expectations.
Therefore, in the described meter transformer of Fig. 1 of patent documentation 1, on the side wall portion of canister respectively the position relative with each phase conductor be provided with arm as the target receiving room, and in each arm, dispose the target of each phase.In such structure, can reduce his phase electric field effects, thereby improve the certainty of measurement of each phase voltage.
In addition, also disclose a kind of meter transformer in the patent documentation 2, this meter transformer is provided with the tubular ground shield that surrounds each phase conductor respectively, and disposes around the target of the tubular of conductor in the inboard of each ground shield.
The prior art document
Patent documentation
Patent documentation 1: the Japanese Utility Model patent is opened flat 5-6376 communique in fact
Patent documentation 2: Japanese patent laid-open 2-115770 communique
Summary of the invention
Invent technical problem to be solved
Yet, for example in the meter transformer of Fig. 8 of patent documentation 1, have following problem: namely, owing to be subjected to the electric field influence of his phase conductor from the target of phase, make to be increased by the caused error of his phase induced voltage, be difficult to correctly measure each phase voltage thus.
In addition, in the meter transformer of Fig. 1 of patent documentation 1, because the target of each phase only conductor with separately corresponding phase is relative, therefore if compare in the structure that disposes target on every side coaxially of conductor like that with Fig. 8 of for example patent documentation 1, then the sensitivity of voltage detecting decreases, thus, may limit use in requiring more high-precision situation.In addition, in this structure, need the arm that target is taken in usefulness all be set mutually at each, so meter transformer has to arrange three arms in canister.
In addition, in the meter transformer of patent documentation 2, owing at the inboard of ground shield and by conductor one side configuration target, therefore need guarantee the insulation distance between target and the conductor, thus exist the radial dimension of canister to become big problem.
The present invention is in view of above-mentioned and finish, its purpose is to provide a kind of meter transformer that is applied in the three-phase integrated type gas-insulated switchgear device, this meter transformer can relax the electric field effects of his phase conductor, thereby can detect the voltage from phase accurately, and the radial dimension of canister is diminished.
The technical scheme that the technical solution problem adopts
In order to address the above problem, achieve the goal, meter transformer involved in the present invention is applicable to the three-phase integrated type gas-insulated switchgear device of taking in the center conductor of three-phase in inclosure has the cylindrical metal container of insulating gas along the axis direction of this canister, and the voltage on the center conductor that is applied to described three-phase respectively measured, it is characterized in that, comprise: metal joint portion, this metal joint portion is installed in the described canister, and is formed with respectively three hole portions that the center conductor by described three-phase connects; Target cylindraceous, this target are installed on via the insulating component of ring-type on the periphery of each hole portion of described metal joint portion, and are configured to surround the periphery of the center conductor of each phase that connects described each hole portion respectively; Ground shield cylindraceous roughly, this ground shield is configured to along described axis direction adjacent with the target of each phase respectively, and coaxial with this target, so that this ground shield surrounds the periphery of the center conductor that connects this target; And insulated enclosure terminal, this insulated enclosure terminal is installed on the arm of the side that is arranged on described canister, and guaranteeing hermetic to draw the lead-in wire that is connected with the target of described each phase respectively, the internal diameter of the target of described each phase is bigger than the internal diameter of the described ground shield adjacent with this target on described axis direction.
The invention effect
According to the present invention, a kind of meter transformer that is applied in the three-phase integrated type gas-insulated switchgear device is provided, can play following effect: can pass through to relax the electric field effects of his phase conductor, thereby detect from phase voltage accurately, and the radial dimension of canister is diminished.
Description of drawings
Fig. 1 is the figure of the horizontal section structure of the related meter transformer of expression execution mode 1.
Fig. 2 is the longitudinal profile structure chart along the A-A line of Fig. 1.
Fig. 3 is the detail view of the B part of Fig. 2.
Fig. 4 is the figure that the part of Fig. 3 is amplified.
Fig. 5 is the figure that expression applies the pattern of voltage.
Fig. 6 is expression d size and the figure that is responded to the relation of caused error and electrostatic capacitance α by him mutually.
Fig. 7 is the figure of a part of the longitudinal profile structure of the related meter transformer of expression execution mode 2.
Fig. 8 is expression b size and the figure that is responded to the relation of caused error and electrostatic capacitance α by him mutually.
Fig. 9 is the figure of a part of the longitudinal profile structure of the related meter transformer of expression execution mode 3.
Figure 10 is the length D that represents for the axis direction of ground shield 4a, is responded to the figure of caused error mutually by him.
Figure 11 is another longitudinal profile structure chart along the A-A line.
Figure 12 is the detail view of the B part of Figure 11.
Embodiment
Below, be elaborated based on the execution mode of accompanying drawing to meter transformer involved in the present invention.In addition, the present invention and can't help these execution modes and limit.
Fig. 1 is the figure of the horizontal section structure of the related meter transformer of expression present embodiment, and Fig. 2 is the longitudinal profile structure chart along the A-A line of Fig. 1, and Fig. 3 is the detail view of the B part of Fig. 2.
The structure of employed meter transformer in the three-phase integrated type gas-insulated switchgear device has been shown among Fig. 1～Fig. 3.In inclosure for example SF is arranged
6In the tubular canister 1 of insulating gass such as gas, take in the center conductor 2a～2c of three-phase together.Canister 1 for example is cylindric, and ground connection.On the central axis direction of canister 1, extend respectively and be provided with center conductor 2a～2c.Because central shaft and center conductor 2a～2c central shaft separately of canister 1 are parallel to each other, therefore following direction with these central shafts simply is called " axis direction ".Center conductor 2a～2c is the main circuit conductor as high-voltage charging portion.Center conductor 2a～2c for example is configured in the summit of equilateral triangle.Center conductor 2a～2c also can for example be configured in the summit of isosceles triangle.In addition, center conductor 2a～2c is supported by not shown insulating supporting body (for example insulation gap spare).In addition, among Fig. 1, the section of center conductor 2a～2c is shown solid, but for example also can be cylindrical.
The meter transformer of present embodiment comprises: metal joint portion 3, this metal joint portion 3 for example roughly are discoideus, and have the 20a～20c of hole portion that is connected by center conductor 2a～2c respectively; Target 5a, this target 5a is installed on the periphery of the 20a of hole portion of metal joint portion 3 via insulating component 10, and be configured to center conductor 2a coaxial so that this target 5a surrounds the periphery of center conductor 2a; Ground shield 4a, this ground shield 4a is configured in the mode adjacent with target 5a along axis direction, and be configured to center conductor 2a coaxial so that this ground shield 4a surrounds the periphery of center conductor 2a; Holding wire 6a, this holding wire 6a are the lead-in wires that is connected with target 5a; Target 5b, this target 5b is installed on the periphery of the 20b of hole portion of metal joint portion 3 via insulating component 10, and be configured to center conductor 2b coaxial so that this target 5b surrounds the periphery of center conductor 2b; Ground shield 4b, this ground shield 4b is configured in the mode adjacent with target 5b along axis direction, and be configured to center conductor 2b coaxial so that this ground shield 4b surrounds the periphery of center conductor 2b; Holding wire 6b, this holding wire 6b are the lead-in wires that is connected with target 5b; Target 5c, this target 5c is installed on the periphery of the 20c of hole portion of metal joint portion 3 via insulating component 10, and be configured to center conductor 2c coaxial so that this target 5c surrounds the periphery of center conductor 2c; Ground shield 4c, this ground shield 4c is configured in the mode adjacent with target 5c along axis direction, and be configured to center conductor 2c coaxial so that this ground shield 4c surrounds the periphery of center conductor 2c; Holding wire 6c, this holding wire 6c are the lead-in wires that is connected with target 5c; Insulation airtight terminal 7, this insulation airtight terminal 7 is installed on the arm 14 of the side that is arranged on canister 1, and guarantees hermetic holding wire 6a～6c to be drawn out to the outside of canister 1; And AD converter section 8, this AD converter section 8 is connected with above-mentioned insulation airtight terminal 7, detect after each magnitude of voltage of center conductor 2a～2c according to each magnitude of voltage via the target 5a～5c of holding wire 6a～6c output, convert these detected magnitudes of voltage to digital signal and with its output.
In the meter transformer of present embodiment, to export to the outside with target 5a～5c induced voltage separately of canister 1 electric insulation, and calculate center conductor 2a～2c voltage separately according to these induced voltages, thereby constitute so-called capacitor voltage divider.For example, the electrostatic capacitance between the electrostatic capacitance between center conductor 2a and the target 5a and target 5a and the canister 1 is carried out dividing potential drop to the voltage of center conductor 2a, with the voltage as target 5a.Therefore, if try to achieve electrostatic capacitance between center conductor 2a and the target 5a in advance, then can detect the voltage of center conductor 2a by the voltage that detects target 5a.In addition, in fact, be suitable magnitude of voltage in order to make the induced voltage on the intermediate voltage 5a, for example can between insulation airtight terminal 7 and canister 1, arrange and adjust capacitor (not shown) etc. Center conductor 2b, 2c also are the same.
Metal joint portion 3 for example is rendered as diameter a little than little discoideus of the internal diameter of canister 1, and engages with canister 1 by junction surface 9.Metal joint portion 3 has three 20a～20c of hole portion that the configuration according to center conductor 2a～2c forms, and the 20a～20c of hole portion has the diameter bigger than the external diameter of center conductor 2a～2c respectively.In addition, center conductor 2a～2c is configured to any and does not all contact with metal joint portion 3.Center conductor 2a～2c generally perpendicularly connects metal joint portion 3 via each 20a～20c of hole portion.
It is cylindric that ground shield 4a for example roughly is, be configured to center conductor 2a coaxial so that it surrounds the periphery of center conductor 2a.Ground shield 4a is configured to along axis direction adjacent with target 5a.Ground shield 4a is formed with flange part 41 at that end by target 5a one side, and the other end of an opposite side with target 5a then is to concentrate and be rendered as the bend 42 of the shape that extends outside smoothly with regulation curvature for relaxing electric field.In illustrated example, be provided with a pair of ground shield 4a, this is disposed at the both sides of target 5a to ground shield 4a, and at axis direction clamping target 5a.Herein, it is relative across space part 13 with the end of target 5a that a ground shield among a pair of ground shield 4a is configured to its flange part 41, another ground shield among a pair of ground shield 4a then is configured to its flange part 41 and is positioned on the relative face of the face with disposing insulating component 10 of metal joint portion 3, and a pair of ground shield 4a is installed in the metal joint portion 3 by for example bolt etc.For example, the bolt 11 that utilizes length also to grow than the axis direction length of target 5a is installed to an above-mentioned ground shield 4a in the metal joint portion 3.Space part 13 is the gas gaps that make an above-mentioned ground shield 4a and target 5a insulation.Target 5a is by insulating component 10 and space part 13 and canister 1 insulation.In the three-phase integrated type gas-insulated switchgear device, can be subjected to the center conductor 2b of his phase, the electric field effects of 2c from the target 5a of phase, but ground shield 4a can relax by the center conductor 2b of his phase, the electric field effects that 2c produces.In addition, because ground shield 4b, 4c also are the same, therefore omit explanation herein.
The internal diameter of the target 5a for example internal diameter than ground shield 4a is big.Equally, also for example the internal diameter than ground shield 4b is big for the internal diameter of target 5b, and the internal diameter of target 5c also for example the internal diameter than ground shield 4c is big.Fig. 4 is the figure after the part of Fig. 3 is amplified, and the internal diameter of target 5a is bigger than the internal diameter of ground shield 4a, the internal diameter of the internal diameter of d=(target 5a-ground shield 4a)/2〉0.
Herein, the effect of setting the internal diameter of target 5a～5c bigger than the internal diameter of ground shield 4a～4c is respectively described.Fig. 5 is the figure of pattern that expression applies voltage, is used for the variation that the electrostatic capacitance between explanation target 5a and the center conductor 2a produces because of the influence of the voltage of center conductor 2b, 2c.For applying voltage (1), be 100% at the voltage of center conductor 2a, and the voltage of center conductor 2b, 2c is under 0% the situation, the electrostatic capacitance between target 5a and the center conductor 2a is α (F).That is the electrostatic capacitance when, α is not illustrated in not electric field influence from center conductor 2b, 2c.Relative therewith, for applying voltage (2), be 100% at the voltage of center conductor 2a, and the voltage of center conductor 2b, 2c is under-50% the situation, the electrostatic capacitance between target 5a and the center conductor 2a is β (F).That is, to be illustrated in from him be the electrostatic capacitance of electric field influence when maximum of center conductor 2b, 2c to β mutually.So based on the voltage of target 5a, the voltage measuring value of center conductor 2a is responded to caused error mutually by him can be as giving a definition:
Respond to error (%)=(alpha-beta)/α * 100 that cause mutually because of him ... (1)
That is, in (1) formula, be used to estimate by him and respond to caused error mutually from electrostatic capacitance β when maximum of the electric field influence of his phase, and electrostatic capacitance α when not being subjected to electric field influence from his phase.In addition, about the definition of (1) formula, target 5b, 5c are also identical.For example, voltage based on target 5b, the voltage measuring value of center conductor 2b by he respond to mutually the voltage of caused error by center conductor 2b be 100% and the voltage of center conductor 2a, the 2c voltage that is 0% o'clock electrostatic capacitance α and center conductor 2b be 100% and the voltage of center conductor 2a, 2c be-50% o'clock electrostatic capacitance β, (1) formula of utilization defines.
Fig. 6 is that expression is responded to caused error and electrostatic capacitance α for the internal diameter of internal diameter-ground shield 4a of d=(target 5a mutually by him)/2 figure.Solid line is represented to respond to caused error mutually by him, and dotted line is represented electrostatic capacitance α.As shown in Figure 6, along with the increase of d size, electrostatic capacitance α can reduce as can be known, also reduces but respond to caused error mutually by him.Therefore, by setting d〉0, can suppress to respond to caused error mutually by him, thereby can more correctly measure the voltage from the center conductor 2a of phase.In addition, Fig. 6 also sets up naturally for target 5b, 5c.
As described above, according to present embodiment, because the internal diameter of target 5a～5c is all set greatlyyer than the internal diameter of ground shield 4a～4c, therefore can suppress the electric field effects that the center conductor by his phase produces, thus can be with the voltage of higher precision measure from the center conductor of phase.
In addition, according to present embodiment, because target 5a～5c all is configured to cylindric around center conductor 2a～2c, for example the target phase specific area with Fig. 1 of patent documentation 1 is bigger, therefore, has improved the sensitivity of voltage detecting.In addition, among Fig. 1 of patent documentation 1, three targets need be set in canister take in the arm of usefulness, and in the present embodiment, the number of arm 14 can be one, so the processing of canister 1 obtains simplifying.
In addition, in the meter transformer of patent documentation 2, owing at the inboard of ground shield and by conductor one side configuration target, therefore need guarantee the insulation distance between target and the conductor, thus exist the radial dimension that makes canister to become big problem.Relative with it, in the present embodiment, because the internal diameter of target 5a～5c is all set greatlyyer than the internal diameter of ground shield 4a～4c, therefore compare with the meter transformer of patent documentation 2, can reduce the radial dimension of canister 1.
In addition, according to present embodiment, because target 5a and ground shield 4a are configured to along axis direction adjacent, target 5b and ground shield 4b are configured to along axis direction adjacent, target 5c and ground shield 4c are configured to along axis direction adjacent, therefore compare with the meter transformer of patent documentation 2 disposes target like that in the inboard of ground shield structure, can guarantee insulation distance, and the radial dimension of canister 1 is diminished.
In addition, according to present embodiment, owing to for example be provided with the space part 13 as gas gap between ground shield among a pair of ground shield 4a and the target 5a, therefore need not another ground shield in a pair of ground shield 4a and the target 5a insulating component 10 to be set between it, thereby can omit the one-sided insulating component of target 5a, make designs simplification.In addition, also can be following structure: space part 13 is not set, but between two ground shields of a pair of ground shield 4a and target 5a, insulating component is set all.Figure 11 is another longitudinal profile structure chart along the A-A line, and Figure 12 is the detail view of the B part of Figure 11.As Figure 11 and shown in Figure 12, for example dispose the insulating component 10 of ring-type between target 5a and the metal joint portion 3, and for example dispose the insulating component 12 of ring-type between ground shield among a pair of ground shield 4a and the target 5a.The structure of Figure 11 and Figure 12 has the effect identical with present embodiment except having simplified said structure.In addition, target 5b, 5c also are the same.
In addition, according to present embodiment, owing to dispose the ground shield 4a that target 5a in clamping in the both sides of axis direction, therefore can suppress by the center conductor 2b of his phase, the electric field effects that 2c produces, thereby can measure voltage from the center conductor 2a of phase accurately.In addition, preferably ground shield 4a is disposed at the structure of target 5a both sides, but also can only be disposed at the arbitrary one-sided of target 5a.In addition, target 5b, 5c also are same.
Under the situation that ground shield 4a is not set, need the electric field of metal joint portion 3 peripheries be relaxed.As described in present embodiment, by ground shield 4a is set, can realize relaxing the electric field of metal joint portion 3 peripheries, and relax by the center conductor 2b of his phase, the electric field effects that 2c produces.In addition, target 5b, 5c also are same.
Execution mode 2
Fig. 7 is the figure of a part of the longitudinal profile structure of the related meter transformer of expression execution mode 2, is the figure that will compare with Fig. 4.In the present embodiment, based on the structure of execution mode 1, further the relation of the internal diameter of the internal diameter of middle electrode 5a～5c and insulating component 10 is stipulated.That is, as shown in Figure 7, the internal diameter of the insulating component 10 of the ring-type between metal joint portion 3 and target 5a is than the internal diameter of target 5a little (with reference to the P zone), the internal diameter of internal diameter-insulating component 10 of b=(target 5a)/2〉0.In addition, same relation is also all set up for target 5b with the contacted insulating component 10 of this target 5b and target 5c with the contacted insulating component 10 of this target 5c.Relative with it, in the execution mode 1, the internal diameter of the internal diameter of insulating component 10 and target 5a about equally.In addition, other structures of present embodiment are identical with execution mode 1.
Fig. 8 is that expression is responded to caused error and electrostatic capacitance α for the internal diameter of internal diameter-insulating component 10 of b=(target 5a mutually by him)/2〉0 figure.Solid line is represented to respond to caused error mutually by him, and dotted line is represented electrostatic capacitance α.As shown in Figure 8, along with the increase of b size, electrostatic capacitance α can reduce as can be known, also reduces but respond to caused error mutually by him.Therefore, by setting b〉0, can suppress to respond to caused error mutually by him, thereby can more correctly measure voltage from the center conductor 2a of phase.In addition, Fig. 8 also sets up naturally for target 5b, 5c.
According to present embodiment, because the internal diameter of target 5a～5c is all set greatlyyer than the internal diameter of insulating component 10, therefore can suppress the electric field effects that the center conductor by his phase produces, thereby can measure the voltage from the center conductor of phase accurately.Other effects of present embodiment are identical with execution mode 1.
Fig. 9 is the figure of a part of the longitudinal profile structure of the related meter transformer of expression present embodiment, is the figure that will compare with Fig. 4.In the present embodiment, based on the structure of execution mode 1, further the relation of the axis direction length of the axis direction length of for example target 5a and ground shield 4a is stipulated.That is, as shown in Figure 9, be made as C in the axis direction length with target 5a, when the axis direction length of ground shield 4a is made as D, satisfy D 〉=C in the present embodiment.In addition, same relation is for target 5b and ground shield 4b and target 5c and also all establishments of ground shield 4c.
Figure 10 is that expression is responded to caused error for the figure of the axis direction length D of ground shield 4a mutually by him.Illustrated among Figure 10 for C be of a size of little, in, big three kinds of situations, D size and the relation of being responded to mutually by him between the caused error.In addition, represent to be responded to mutually by him the desired value of caused error with Q.Desired value Q be if error at this below value, then the certainty of measurement of voltage is in the interior value of desired specification.As shown in figure 10, along with the increase of D size, respond to caused error mutually by him and also can reduce as can be known.To C be of a size of little, in, three kinds of big situations compare, then more mistake is more little for the C size.Therefore, if make the axis direction length of ground shield 4a longer, then can suppress to respond to caused error mutually by him, if it is the axis direction length of ground shield 4a and the axis direction length of target 5a are compared, comparatively effective when then for example setting D 〉=C.
In addition, among Figure 10, in the represented zone of R, respond to caused error mutually by him and all roughly equate with desired value Q, have nothing to do and be of a size of three kinds of large, medium and small situations with C.In addition, above-mentioned explanation is also set up the relation of ground shield 4b and target 5b and the nature that concerns of ground shield 4c and target 5c.
According to present embodiment, owing to the length of the axis direction of ground shield 4a is made as the length of axis direction of target 5a with first-class, therefore the electric field effects that the center conductor by his phase produces can be suppressed, thereby the voltage from the center conductor of phase can be measured accurately.
In addition, as Fig. 9 institute formula, the radical length of ground shield 4a (radical length of flange part) is for example long than the radical length of target 5a.
Other effects of present embodiment and execution mode 1,2 identical.In addition, present embodiment also can be combined with execution mode 2.
Industrial practicality
As implied above, the present invention has actual effect as the meter transformer that is applied in the three-phase integrated type gas-insulated switchgear device.
Label declaration
1 canister
2a～2c center conductor
3 metal joint portions
4a～4c ground shield
5a～5c target
6a～6c holding wire
7 insulation airtight terminals
8 AD converter sections
9 junction surfaces
10,12 insulating components
11 bolts
13 space parts
14 arms
20a～20c hole portion
41 flange parts
42 bends
Claims (5)
1. meter transformer, be applicable to the three-phase integrated type gas-insulated switchgear device of in inclosure has the cylindrical metal container of insulating gas, taking in the center conductor of three-phase along the axis direction of this canister, and the voltage on the center conductor that is applied to described three-phase respectively measured, it is characterized in that, comprising:
Metal joint portion, this metal joint portion is installed in the described canister, and is formed with respectively three hole portions that the center conductor by described three-phase connects;
Target cylindraceous, this target cylindraceous are installed on via the insulating component of ring-type on the periphery of each hole portion of described metal joint portion, and are configured to surround the periphery of the center conductor of each phase that connects described each hole portion respectively;
Roughly be ground shield cylindraceous, this roughly is ground shield cylindraceous and is configured to along described axis direction adjacent with the target of each phase respectively, and coaxial with this target, so that this ground shield surrounds the periphery of the center conductor that connects this target;
And the insulated enclosure terminal, this insulated enclosure terminal is installed on the arm of the side that is arranged on described canister, and guarantees hermetic to draw the lead-in wire that is connected with the target of described each phase respectively,
The internal diameter of the target of described each phase is bigger than the internal diameter of the described ground shield adjacent with this target on described axis direction.
2. meter transformer as claimed in claim 1 is characterized in that,
The described target of described ground shield clamping and be configured in the both sides of described axis direction.
3. meter transformer as claimed in claim 2 is characterized in that,
Be disposed between the one-sided described ground shield of described target and the described target and be provided with gas gap.
4. meter transformer as claimed in claim 1 is characterized in that,
The internal diameter of described target is bigger than the internal diameter of described insulating component.
5. meter transformer as claimed in claim 1 is characterized in that,
The length of the described axis direction of described ground shield is more than the length of the described axis direction of the described target adjacent with this ground shield.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2011/061659 WO2012160625A1 (en) | 2011-05-20 | 2011-05-20 | Transformer for instruments |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103348425A true CN103348425A (en) | 2013-10-09 |
| CN103348425B CN103348425B (en) | 2016-03-02 |
Family
ID=45907963
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201180066745.2A Active CN103348425B (en) | 2011-05-20 | 2011-05-20 | Meter transformer |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP4896280B1 (en) |
| CN (1) | CN103348425B (en) |
| WO (1) | WO2012160625A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105723227A (en) * | 2013-11-15 | 2016-06-29 | 三菱电机株式会社 | Voltage detection device and voltage detection method |
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| CN1077567A (en) * | 1992-03-17 | 1993-10-20 | 株式会社日立制作所 | The instrument current transformer that is used for power cable |
| CN1373484A (en) * | 2001-03-06 | 2002-10-09 | 三菱电机株式会社 | Threephase common-box current transformer |
| JP2003109447A (en) * | 2001-09-28 | 2003-04-11 | Toshiba Corp | Polymer insulating tube and transformation device using the same |
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| JPH02115770A (en) * | 1988-10-26 | 1990-04-27 | Toshiba Corp | Voltage detector for three-phase collective type gas insulated electric apparatus |
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| WO2001065653A1 (en) * | 2000-03-01 | 2001-09-07 | Hitachi, Ltd. | Gas insulated device and failure rating method |
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| CN1077567A (en) * | 1992-03-17 | 1993-10-20 | 株式会社日立制作所 | The instrument current transformer that is used for power cable |
| CN1373484A (en) * | 2001-03-06 | 2002-10-09 | 三菱电机株式会社 | Threephase common-box current transformer |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105723227A (en) * | 2013-11-15 | 2016-06-29 | 三菱电机株式会社 | Voltage detection device and voltage detection method |
| CN105723227B (en) * | 2013-11-15 | 2018-09-04 | 三菱电机株式会社 | Voltage check device and voltage detection method |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4896280B1 (en) | 2012-03-14 |
| JPWO2012160625A1 (en) | 2014-07-31 |
| WO2012160625A1 (en) | 2012-11-29 |
| CN103348425B (en) | 2016-03-02 |
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