CN208689112U - Intelligent switching wire device for electrical test of power transformer - Google Patents
Intelligent switching wire device for electrical test of power transformer Download PDFInfo
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- CN208689112U CN208689112U CN201821290002.9U CN201821290002U CN208689112U CN 208689112 U CN208689112 U CN 208689112U CN 201821290002 U CN201821290002 U CN 201821290002U CN 208689112 U CN208689112 U CN 208689112U
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Abstract
The utility model discloses an electric experimental intelligent switching wire device of power transformer, including total control unit, dielectric loss test unit, insulation resistance test unit, direct current resistance test unit, on-load tap-changer characteristic test unit and switching wire device, total control unit passes through control bus and dielectric loss test unit, insulation resistance test unit, direct current resistance test unit, on-load tap-changer characteristic test unit, switching wire device control connection; the switching line device is connected with the tested transformer through a test line; the utility model discloses with dielectric loss, insulation resistance, direct current resistance and on-load tap-changer characteristic test function integrated to an instrument in, under the cooperation of switching wire device, accomplish the test work of all detection items at each detection site of transformer.
Description
Technical field
The utility model relates to power transformer field of measuring technique, in particular to power transformer electrical test is intelligently cut
Wire-changing device.
Background technique
In order to guarantee the normal operation of electric system, it is necessary to carry out periodic detection, power transformer to all kinds of electrical equipments
As the power supply unit of core, performance quality directly influences the safe operation of power grid.Traditional approach detects power transformer
It needs using more special test equipments, according to different measure the item and detection position, by the different instrument of artificial selection, more
It changes various p-wires and test position is tested.Field test there are heavy workload, it is cumbersome, be easy error, reliability
Difference, the problems such as test period is long.
Utility model content
The technical problem to be solved by the utility model is to for present in existing detection power transformer it is above-mentioned not
A kind of power transformer electrical test intelligence switching line apparatus is provided enough.Intelligently switching is traditional thread binding for the power transformer electrical test
Setting can be in measurement process, disposable wiring, automatically switches the pertinent instruments survey different to transformer with the p-wire of instrument
Amount position measures, and participates in without artificial, improves testing efficiency.
Technical problem to be solved in the utility model can be achieved through the following technical solutions:
Power transformer electrical test intelligently switching line apparatus, an including Master Control Unit, dielectric loss test cell, insulation
Resistance test unit, D.C. resistance test cell, load ratio bridging switch characteristic test unit and all wire-changing devices, it is described total
Control unit by control bus and the dielectric loss test cell, megger test unit, D.C. resistance test cell, have
On-load shunting switch characteristic test unit, switching line apparatus control connection；The switching line apparatus and subject transformer pass through test
Line connection；Different according to pilot project, the Master Control Unit control switching line apparatus cuts the p-wire of connection subject transformer
Shift to respectively with the dielectric loss test cell, megger test unit, D.C. resistance test cell, load ratio bridging switch
The connection of characteristic test unit, carries out dielectric loss and electric capacity measuring, the dielectric loss of medium-tension bushing and electric capacity measuring, height of bushing
Press winding dielectric loss and electric capacity measuring, middle pressure winding dielectric loss and electric capacity measuring, low pressure winding dielectric loss and electricity over the ground over the ground over the ground
Cubic content measurement, high pressure winding dielectric loss and electric capacity measuring, senior middle school's low pressure winding dielectric loss and electric capacity measuring, high pressure over the ground over the ground
Winding insulation against ground resistance measurement, middle pressure winding insulation against ground resistance measurement, low pressure winding insulation against ground resistance measurement, high pressing sleeve
Pipe end shield insulation against ground resistance measurement, medium-tension bushing end shield insulation against ground resistance measurement, high-voltage winding direct current resistance m easurem ent, middle pressure
Winding D.C. resistance measurement, low pressure winding direct current resistance m easurem ent, high-voltage winding load ratio bridging switch feature measurement and middle pressure winding
Load ratio bridging switch feature measurement.
In a preferred embodiment of the utility model, the switching line apparatus includes passing through the control bus and institute
It states Master Control Unit connection and controls the high-pressure side control of high-pressure side, medium voltage side, each position of low-pressure side, project survey switching action respectively
Unit processed, medium voltage side control unit, low-pressure side control unit and by high-pressure side control unit, medium voltage side control unit, low-pressure side
Height pressure switching unit, end shield position switch unit, medium and the insulation resistance outlet switch unit of control unit co- controlling,
D.C. resistance and load ratio bridging switch p-wire switch unit, the height pressure switching unit, end shield position switch unit, medium
Connection is tested transformer with insulation resistance outlet switch unit, D.C. resistance and load ratio bridging switch p-wire switch unit
P-wire switch to respectively with the dielectric loss test cell, megger test unit, D.C. resistance test cell, have load
The connection of tap switch characteristic test unit, carries out dielectric loss and electric capacity measuring, the dielectric loss of medium-tension bushing and capacitor of bushing
Dielectric loss and electric capacity measuring, low pressure winding be over the ground over the ground for dielectric loss and electric capacity measuring, middle pressure winding over the ground for measurement, high-voltage winding
Dielectric loss and electric capacity measuring, high pressure winding dielectric loss and electric capacity measuring, senior middle school's low pressure winding dielectric loss and capacitance over the ground over the ground
Measurement, high-voltage winding insulation against ground resistance measurement, middle pressure winding insulation against ground resistance measurement, low pressure winding insulation against ground resistance are surveyed
Amount, end shield of high-voltage bushing insulation against ground resistance measurement, medium-tension bushing end shield insulation against ground resistance measurement, high-voltage winding D.C. resistance
Measurement, the measurement of middle pressure winding D.C. resistance, low pressure winding direct current resistance m easurem ent, high-voltage winding load ratio bridging switch feature measurement and
Middle pressure winding load ratio bridging switch feature measurement.
In a preferred embodiment of the utility model, the mechanism in the height pressure switching unit to switch is one
Lead screw transmission mechanism driven by stepper motors is provided with slide unit, the stepping on the screw in the lead screw transmission mechanism
Motor drives the slide unit to switch between low-pressure line-outgoing, transformer outlet and high pressure HV outlet by lead screw transmission mechanism.
In a preferred embodiment of the utility model, end shield position switch unit switches including an end shield position
Circuit board and 8 single-pole double throws being mounted on the end shield position switching circuit plate obtain relay composition, and 8 single-pole double throws obtain
Relay will press end shield to switch between high pressure and high-tension shielding in four high-pressure side end shields, four respectively.
In a preferred embodiment of the utility model, to cut in the medium and insulation resistance outlet switch unit
The mechanism changed is a lead screw transmission mechanism driven by stepper motors, is provided with cunning on the screw in the lead screw transmission mechanism
Platform, the stepper motor by lead screw transmission mechanism drive the slide unit a megaohm outlet, dielectric loss outlet and high pressure HV outlet it
Between switch.
In a preferred embodiment of the utility model, the D.C. resistance and the switching of load ratio bridging switch p-wire are single
Member includes a switching circuit board and several relays composition being mounted on the switching circuit plate, and several relays are realized respectively
High-voltage winding direct current resistance m easurem ent, the measurement of middle pressure winding D.C. resistance, low pressure winding direct current resistance m easurem ent and high-voltage winding have load
The switching of tap switch feature measurement and middle pressure winding load ratio bridging switch feature measurement.
Due to using technical solution as above, the utility model is by dielectric loss, insulation resistance, D.C. resistance and has load
Tap switch characteristic test function is integrated into an instrument, under the cooperation of switching line apparatus, completes each detection of transformer
The experiment work of all detection projects at position.When test, detection project that instrument is selected according to user, detection position are cut automatically
Thread-changing, testing crew only need disposably by dedicated testing wire be connected to subject transformer test position on, instrument automatically according to
Automatically mesh measures the experiment process of setting item by item, and whole process is not necessarily to manual intervention, until all items are measured, it is defeated
Test result out.
Compared with prior art, the utility model has the advantages that
1. comparing traditional approach, instrument quantity is few, and total weight is light, small in size, is conveniently carried to field test.
2. need ceaselessly to replace different detecting instruments under traditional approach, artificial wiring and according to different tests instrument and
Experiment position carries out artificial thread-changing.The utility model only needs primary connection, is not required to carry out artificial thread-changing again in measurement process, automatically
Complete all detection projects.To reduce labour, reduces labor intensity, error probability and improve safety coefficient.
3. automatically recording measurement result, analyzing result and making result judgement, examining report is provided.Solves traditional approach
The problem of lower hand-kept test result, artificial statistical analysis, manual manufacture examining report low efficiency.
Detailed description of the invention
Fig. 1 is the composition block diagram that the electrical test of the utility model power transformer intelligently switches line apparatus.
Fig. 2 is in the height pressure switching unit that the electrical test of the utility model power transformer intelligently switches in line apparatus
Switching mechanism and schematic diagram.
Fig. 3 is that the height pressure switching unit that the electrical test of the utility model power transformer intelligently switches in line apparatus carries out
The schematic illustration of high pressure part switching.
Fig. 4 is the end shield position switch unit in the utility model power transformer electrical test intelligence switching line apparatus
Schematic illustration.
Fig. 5 is medium and insulation resistance outlet in the utility model power transformer electrical test intelligence switching line apparatus
Switching principle figure before switch unit.
Fig. 6 is the D.C. resistance and loaded tap-off in the utility model power transformer electrical test intelligence switching line apparatus
The switching principle figure of switch testing line switch unit.
Specific embodiment
The utility model incorporates dielectric loss, insulation resistance, D.C. resistance, loaded tap-off characteristic 4 kinds of traditional instruments
Detection function.Instrument moduleization design, top control module control the work of 4 measurement modules by control bus, measurement module
Input and output access measurement bus is selected according to the instruction of top control module according to detection project and detection position by switching line apparatus
On measurement module to the calibrating terminal of subject transformer.Required pilot project is automatically performed under the control of TT&C software.
The performance requirement of the utility model is as follows:
1. experiment power supply ceiling voltage is 10kV when for transformer difference winding and the dielectric loss electric capacity measuring of end shield
(45Hz-55Hz) signal, switching device must satisfy the switching of 10kV high pressure and need to prevent from being measured due to switching device bring
Error, it is therefore desirable to guarantee enough insulation distances, measuring signal must carry out shielding.
2. being directed to transformer winding and end shield insulation measurement, experiment power supply is up to 5000V high direct voltage, switch line
Device also needs the influence for preventing measurement end surface leakage to measurement result in addition to guarantee enough safe distances.
3. the test power supply that straight resistance and load ratio bridging switch measurement use is low-voltage, high-current direct current signal, switch line apparatus
The through-current capability of the above DC current of > 10A need to be met.And electric current, voltage test signal switch over respectively.
Referring to Fig. 1, power transformer electrical test intelligence switching line apparatus shown in figure, including a Master Control Unit 10,
Dielectric loss test cell 20, megger test unit 30, D.C. resistance test cell 40, load ratio bridging switch characteristic test
Unit 50 and all wire-changing devices 60, Master Control Unit 10 pass through control bus 70 and dielectric loss test cell 20, insulated electro
Hinder test cell 30, D.C. resistance test cell 40, load ratio bridging switch characteristic test unit 50, the switching control of line apparatus 60 company
It connects；Switching line apparatus 60 is connect with subject transformer 80 by p-wire；Different according to pilot project, the control of Master Control Unit 10 is cut
The p-wire of connection subject transformer 80 is switched to and is surveyed respectively with dielectric loss test cell 20, insulation resistance by wire-changing device 60
It tries unit 30, D.C. resistance test cell 40, load ratio bridging switch characteristic test unit 50 to connect, carries out the dielectric loss of bushing
And the dielectric loss and electric capacity measuring of electric capacity measuring, medium-tension bushing, high-voltage winding dielectric loss and electric capacity measuring, middle pressure winding over the ground
Dielectric loss and electric capacity measuring, low pressure winding dielectric loss and electric capacity measuring, high pressure winding dielectric loss and capacitance over the ground over the ground over the ground
Dielectric loss and electric capacity measuring, high-voltage winding insulation against ground resistance measurement, middle pressure winding are exhausted over the ground over the ground for measurement, senior middle school's low pressure winding
Edge resistance measurement, low pressure winding insulation against ground resistance measurement, end shield of high-voltage bushing insulation against ground resistance measurement, medium-tension bushing end shield
Insulation against ground resistance measurement, high-voltage winding direct current resistance m easurem ent, the measurement of middle pressure winding D.C. resistance, low pressure winding D.C. resistance are surveyed
Amount, high-voltage winding load ratio bridging switch feature measurement and middle pressure winding load ratio bridging switch feature measurement.
Switching line apparatus 60 includes being connect by control bus 70 with Master Control Unit 10 and controlling high-pressure side, middle pressure respectively
Side, each position of low-pressure side, the high-pressure side control unit of project survey switching action, medium voltage side control unit, low-pressure side control are single
Member and by high-pressure side control unit, medium voltage side control unit, the height pressure switching unit of low-pressure side control unit co- controlling, end
It is single to shield position switch unit, medium and insulation resistance outlet switch unit, D.C. resistance and the switching of load ratio bridging switch p-wire
Member, the height pressure switching unit, end shield position switch unit, medium and insulation resistance outlet switch unit, D.C. resistance and
The p-wire of connection subject transformer is switched to and is surveyed respectively with the dielectric loss by load ratio bridging switch p-wire switch unit
Unit, megger test unit, D.C. resistance test cell, the connection of load ratio bridging switch characteristic test unit are tried, is carried out high
The dielectric loss and electric capacity measuring of pressing sleeve pipe, the dielectric loss of medium-tension bushing and electric capacity measuring, high-voltage winding dielectric loss and capacitance over the ground
Dielectric loss and electric capacity measuring, high pressure winding be over the ground over the ground for dielectric loss and electric capacity measuring, low pressure winding over the ground for measurement, middle pressure winding
Dielectric loss and electric capacity measuring, senior middle school's low pressure winding over the ground dielectric loss and electric capacity measuring, high-voltage winding insulation against ground resistance measurement, in
Press winding insulation against ground resistance measurement, low pressure winding insulation against ground resistance measurement, end shield of high-voltage bushing insulation against ground resistance measurement,
Medium-tension bushing end shield insulation against ground resistance measurement, high-voltage winding direct current resistance m easurem ent, middle pressure winding D.C. resistance measurement, low pressure around
Group direct current resistance m easurem ent, high-voltage winding load ratio bridging switch feature measurement and middle pressure winding load ratio bridging switch feature measurement.
High-pressure side control unit, medium voltage side control unit, the circuit of low-pressure side control unit are identical, and control is high respectively
The thread cutting action for pressing side, medium voltage side, each position of low-pressure side, projects to measure.
In order to meet requirement of the high-tension measurement project (dielectric loss, insulation resistance) to insulation and shielding, traditional relay switching
Mode is unable to satisfy requirement, therefore high pressure switch line uses height pressure switching unit, realize high-potting signal high pressure, in
The different position of pressure, low pressure winding switches over.
Referring to fig. 2, height pressure switching unit is a screw rod transmission machine driven by stepper motor 100 to the mechanism switched
Structure 200, is provided with slide unit 300 on the screw 210 in lead screw transmission mechanism 200, and stepper motor 100 passes through lead screw transmission mechanism
200 driving slide units 300 switch between low-pressure line-outgoing G1, transformer outlet G2 and high pressure HV outlet G3.
Referring to Fig. 3, height pressure switching unit switches applied to high pressure part, wherein each outlet interface is defined as follows:
G1: low-pressure line-outgoing
The low pressure position switch boards of each voltage side are connect, out 4 current lines, 4 pressure-wires.
G2: transformer outlet
The outlet that transformer corresponds to winding side (senior middle school's low pressure) is connect, out 4 current lines, 4 pressure-wires.
G3: high pressure HV outlet
The corresponding outlet of high pressure part HV is connect, out 4 current lines.
Working principle is as follows:
When certain voltage side needs to test low pressure project, slide unit 300 goes to A, allows low-pressure line-outgoing G1 and transformer outlet
G2 is shorted to together, and the p-wire of low-voltage instrument is connected on the winding of transformer, and 4 pressure-wires, current line respectively corresponds this
Winding 0, A, B, C.At this time in the switch unit of high pressure part, it is ensured that and the G3 and high pressure disconnection that G2 is connected.
When needing to measure high pressure project, slide unit 300 goes to B, and low-pressure line-outgoing G1 is allowed to be detached from G2 and G3.G2 is by therewith
The G3 outlet high pressure of short circuit is given to transformer winding end, to complete the measurement of high pressure project.
This height pressure switching unit carries out the handoff functionality at (megaohm and dielectric loss) each position when high pressure project survey, and work is former
It manages as follows:
Stepper motor 100 drives slide unit 300 that can go to high pressure position, middle pressure position, low respectively by lead screw transmission mechanism 200
Press position, high pressure position, senior middle school's low pressure position, end shield position, 7, vacancy position.It has tetra- contacts E1, E2, E3, E4, ontology above
For conductor, allow this four contact short circuits to together.
HV high pressure horizontal stripe is connected to dielectric loss and megaohm high-voltage power supply drawn, and the high-voltage contact gone out such as figure has A1, A2, A3, A4.
Its function action is as follows
1. high-pressure side applies high pressure:
Slide unit 300 is walked to high-pressure side, if figure contact E1-A1, E2-B2 are contacted, leads to F1, F7 outlet high pressure, F7 is high pressure
Side winds outlet, and such high-pressure side 0, four of A, B, C windings are there have been high pressure, on high-tension side height pressure switching unit at this time
Slide unit 300 have to slide to B, allow switch boards and high pressure to be detached from.
2. pressure applies high pressure in
Pass through contact E1-A2, E3-C1；
3. low pressure applies high pressure
Pass through contact E1-A3, E4-D1；
4. high pressure applies high pressure
Pass through contact E1-A4, E2-B2, E3-C2；
5. senior middle school's low pressure applies high pressure
Pass through contact E1-A5, E2-B3, E3-C3, E4-D2；
6. end shield applies high pressure
Pass through contact E1-A6, E2-B4；
7. vacancy
Slide unit 300 is walked to vacancy, all sites as can be seen all with high pressure departing from.
Wherein F7, F8, F9 are respectively the p-wire outlet of senior middle school's low pressure, are connected on the winding that each voltage is surveyed (0, A, B, C).
F4, F5, F6 are coupled in the switch boards of each voltage side, are completed and are directly hindered, the switching of loaded tap-off p-wire.
Referring to fig. 4, end shield position switch unit includes an end shield position switching circuit plate and is mounted on the end shield position
8 single-pole double throws on switching circuit plate obtain relay composition, and 8 single-pole double throws obtain relay respectively for four high-pressure sides end
Shield, pressure end shield switches between high pressure and high-tension shielding in four.Wherein H9 is connected to the F10 in high pressure switching figure, when high crush-cutting
When changing switching and being switched to end shield, H9 is upper just to there is high pressure by F10.H10 connects high-tension shielding, and voltage difference is very between high pressure for it
It is small, so this 8 relays use common relay.H1-H8 respectively corresponds high-pressure side end shield 0, high-pressure side end shield A, height
Press side end shield B, high-pressure side end shield C, medium voltage side end shield 0, medium voltage side end shield A, medium voltage side end shield B, medium voltage side end shield C.They
Long closed end connects H10 high-tension shielding, each position can be allowed to be connected to H9 by control and high pressure occurs.
Referring to Fig. 5, the mechanism in medium and insulation resistance outlet switch unit to switch is driven for one by stepper motor 400
Dynamic lead screw transmission mechanism 500, is provided with slide unit 600 on the screw in lead screw transmission mechanism 500, and stepper motor 400 passes through
Lead screw transmission mechanism 500 drives slide unit 600 to switch between a megaohm outlet, dielectric loss outlet and high pressure HV outlet.Pass through slide unit 600
Which appeared on high pressure HV to control the high pressure of dielectric loss and insulation resistance project.
Wherein G5 is connected with the HV high pressure of Fig. 3, and G6 is connected with a megaohm outlet, and G7 is connected with dielectric loss outlet.
Referring to Fig. 6, D.C. resistance and load ratio bridging switch p-wire switch unit include a switching circuit board and are mounted on
Several relays composition on the switching circuit plate, several relays realize high-voltage winding direct current resistance m easurem ent, middle pressure respectively
Winding D.C. resistance measurement, low pressure winding direct current resistance m easurem ent and high-voltage winding load ratio bridging switch feature measurement and middle pressure winding
The switching of load ratio bridging switch feature measurement.D.C. resistance and load ratio bridging switch p-wire switch unit as three is corresponding
Each voltage side winding.They complete each winding side and directly hinder, have the connection for carrying p-wire.It carries and straight resistance is all four-terminal measurement
Method, that is need 2 pressure-wires, 2 current lines switch on the position of measurement simultaneously.Wherein G4 is the F4 being connected in Fig. 3,
On F5, F6.
Claims (6)
1. power transformer electrical test intelligently switches line apparatus, which is characterized in that tested including a Master Control Unit, dielectric loss
Unit, megger test unit, D.C. resistance test cell, load ratio bridging switch characteristic test unit and switch line dress
It sets, the Master Control Unit is surveyed by control bus and the dielectric loss test cell, megger test unit, D.C. resistance
Try unit, load ratio bridging switch characteristic test unit, switching line apparatus control connection；The switching line apparatus and subject transformer
It is connected by p-wire；Different according to pilot project, the Master Control Unit control switching line apparatus will connect subject transformer
P-wire switch to respectively with the dielectric loss test cell, megger test unit, D.C. resistance test cell, have load
The connection of tap switch characteristic test unit, carries out dielectric loss and electric capacity measuring, the dielectric loss of medium-tension bushing and capacitor of bushing
Dielectric loss and electric capacity measuring, low pressure winding be over the ground over the ground for dielectric loss and electric capacity measuring, middle pressure winding over the ground for measurement, high-voltage winding
Dielectric loss and electric capacity measuring, high pressure winding dielectric loss and electric capacity measuring, senior middle school's low pressure winding dielectric loss and capacitance over the ground over the ground
Measurement, high-voltage winding insulation against ground resistance measurement, middle pressure winding insulation against ground resistance measurement, low pressure winding insulation against ground resistance are surveyed
Amount, end shield of high-voltage bushing insulation against ground resistance measurement, medium-tension bushing end shield insulation against ground resistance measurement, high-voltage winding D.C. resistance
Measurement, the measurement of middle pressure winding D.C. resistance, low pressure winding direct current resistance m easurem ent, high-voltage winding load ratio bridging switch feature measurement and
Middle pressure winding load ratio bridging switch feature measurement.
2. power transformer electrical test as described in claim 1 intelligently switches line apparatus, which is characterized in that the switch line
Device includes being connect by the control bus with the Master Control Unit and controlling high-pressure side, medium voltage side, each portion of low-pressure side respectively
It position, the high-pressure side control unit of project survey switching action, medium voltage side control unit, low-pressure side control unit and is controlled by high-pressure side
Unit processed, medium voltage side control unit, the height pressure switching unit of low-pressure side control unit co- controlling, the switching of end shield position are single
Member, medium and insulation resistance outlet switch unit, D.C. resistance and load ratio bridging switch p-wire switch unit, the high-low pressure
Switch unit, end shield position switch unit, medium and insulation resistance outlet switch unit, D.C. resistance and load ratio bridging switch are surveyed
Examination line switch unit will connection subject transformer p-wire switch to respectively with the dielectric loss test cell, insulation resistance
Test cell, D.C. resistance test cell, the connection of load ratio bridging switch characteristic test unit, carry out the dielectric loss and electricity of bushing
Dielectric loss and electric capacity measuring, middle pressure winding be over the ground over the ground for cubic content measurement, the dielectric loss of medium-tension bushing and electric capacity measuring, high-voltage winding
Dielectric loss and electric capacity measuring, low pressure winding over the ground dielectric loss and electric capacity measuring, high pressure winding over the ground dielectric loss and electric capacity measuring,
Senior middle school's low pressure winding dielectric loss and electric capacity measuring, high-voltage winding insulation against ground resistance measurement, middle pressure winding insulation against ground electricity over the ground
Hinder measurement, low pressure winding insulation against ground resistance measurement, end shield of high-voltage bushing insulation against ground resistance measurement, medium-tension bushing end shield over the ground
Insulation measurement, high-voltage winding direct current resistance m easurem ent, the measurement of middle pressure winding D.C. resistance, low pressure winding direct current resistance m easurem ent,
High-voltage winding load ratio bridging switch feature measurement and middle pressure winding load ratio bridging switch feature measurement.
3. power transformer electrical test as claimed in claim 2 intelligently switches line apparatus, which is characterized in that the high-low pressure
Mechanism in switch unit to switch is a lead screw transmission mechanism driven by stepper motors, in the lead screw transmission mechanism
Screw on be provided with slide unit, the stepper motor drives the slide unit in low-pressure line-outgoing, transformer by lead screw transmission mechanism
Switch between outlet and high pressure HV outlet.
4. power transformer electrical test as claimed in claim 2 intelligently switches line apparatus, which is characterized in that the end shield portion
Position switch unit includes that an end shield position switching circuit plate and 8 hilted broadswords being mounted on the end shield position switching circuit plate are double
It throws to obtain relay composition, 8 single-pole double throws obtain relay will press end shield in high pressure and height in four high-pressure side end shields, four respectively
Switch between pressure shielding.
5. the intelligent switching line apparatus of power transformer electrical test as claimed in claim 2, which is characterized in that the medium and
Mechanism in insulation resistance outlet switch unit to switch is a lead screw transmission mechanism driven by stepper motors, in the silk
Be provided with slide unit on screw in bar transmission mechanism, the stepper motor by lead screw transmission mechanism drive the slide unit megaohm
Switch between outlet, dielectric loss outlet and high pressure HV outlet.
6. power transformer electrical test as claimed in claim 2 intelligently switches line apparatus, which is characterized in that the direct current
Resistance and load ratio bridging switch p-wire switch unit include a switching circuit board and are mounted on several on the switching circuit plate
Relay composition, several relays realize respectively high-voltage winding direct current resistance m easurem ent, middle pressure winding D.C. resistance measure, low pressure around
Group direct current resistance m easurem ent and high-voltage winding load ratio bridging switch feature measurement and middle pressure winding load ratio bridging switch feature measurement
Switching.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821290002.9U CN208689112U (en) | 2018-08-11 | 2018-08-11 | Intelligent switching wire device for electrical test of power transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821290002.9U CN208689112U (en) | 2018-08-11 | 2018-08-11 | Intelligent switching wire device for electrical test of power transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208689112U true CN208689112U (en) | 2019-04-02 |
Family
ID=65884751
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821290002.9U Expired - Fee Related CN208689112U (en) | 2018-08-11 | 2018-08-11 | Intelligent switching wire device for electrical test of power transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208689112U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109142881A (en) * | 2018-08-11 | 2019-01-04 | 国网湖南省电力有限公司电力科学研究院 | Intelligent switching wire device for electrical test of power transformer |
| CN112748371A (en) * | 2020-12-18 | 2021-05-04 | 国网福建省电力有限公司检修分公司 | Universal test structure and logic control method for multiple test items of transformer test |
-
2018
- 2018-08-11 CN CN201821290002.9U patent/CN208689112U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109142881A (en) * | 2018-08-11 | 2019-01-04 | 国网湖南省电力有限公司电力科学研究院 | Intelligent switching wire device for electrical test of power transformer |
| CN109142881B (en) * | 2018-08-11 | 2023-12-22 | 国网湖南省电力有限公司电力科学研究院 | Intelligent switching line device for electric test of power transformer |
| CN112748371A (en) * | 2020-12-18 | 2021-05-04 | 国网福建省电力有限公司检修分公司 | Universal test structure and logic control method for multiple test items of transformer test |
| CN112748371B (en) * | 2020-12-18 | 2024-03-12 | 国网福建省电力有限公司检修分公司 | General test structure for multiple test items of transformer test and logic control method |
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Granted publication date: 20190402 Termination date: 20200811 |