CN207181527U - A kind of DCR of Transformer and no-load voltage ratio test synthesis instrument - Google Patents
A kind of DCR of Transformer and no-load voltage ratio test synthesis instrument Download PDFInfo
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- CN207181527U CN207181527U CN201721128925.XU CN201721128925U CN207181527U CN 207181527 U CN207181527 U CN 207181527U CN 201721128925 U CN201721128925 U CN 201721128925U CN 207181527 U CN207181527 U CN 207181527U
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Abstract
The utility model embodiment provides a kind of DCR of Transformer and no-load voltage ratio test synthesis instrument, including：Instrument shell；It is embedded at the guidance panel on the surface of Instrument shell；Guidance panel includes：Three-phase high-voltage test lead and three-phase low-voltage test lead；The Instrument shell is internally provided with：Current sampling circuit, voltage sampling circuit, the first analog to digital conversion circuit being connected with current sampling circuit, the second analog to digital conversion circuit being connected with voltage sampling circuit, the process chip being connected with the first analog to digital conversion circuit and the second analog to digital conversion circuit, the operating circuit switching circuit being connected with process chip, the constant-current source generative circuit for producing the constant-current source needed for direct current direct resistance metering is connected with operating circuit switching circuit, produces the constant pressure source generative circuit of the constant pressure source needed for no-load voltage ratio test.The utility model embodiment provides a kind of DCR of Transformer and no-load voltage ratio test synthesis instrument, the D.C. resistance for realizing transformer that can be easy and no-load voltage ratio test, lifts testing efficiency.
Description
Technical field
It the utility model is related to transformer testing technology, and in particular to a kind of DCR of Transformer and no-load voltage ratio test synthesis
Instrument.
Background technology
DCR of Transformer is tested and no-load voltage ratio test is that Repair of Transformer must survey project, wherein, transformer dc electricity
Resistance test can effective detection and in time find transformer coil manufacturing defect, as selection is improper, welding, connecting portion loosen,
Lack stock, broken string etc.；Transformer voltage ratio test (test of no-load voltage ratio group) check that whether no-load voltage ratio is consistent with name plate rating, check voltage
Whether shunting switch indicating positions is correct, checks transformer with the presence or absence of turn-to-turn short circuit etc..
Completing the D.C. resistance test of transformer and no-load voltage ratio test at present needs that DCR of Transformer test is respectively configured
Instrument and transformer voltage ratio tester, it is required to carry both instruments when carrying out Repair of Transformer every time, it is extremely onerous；And
Need to carry out testing preparation respectively for direct-current resistance tester for transformer and transformer voltage ratio tester and connect work of taking out stitches
Make, undoubtedly add the work difficulty of DCR of Transformer test and no-load voltage ratio test so that testing efficiency is relatively low.
Utility model content
In view of this, the utility model embodiment provides a kind of DCR of Transformer and no-load voltage ratio test synthesis instrument, with letter
Just the D.C. resistance for realizing transformer and no-load voltage ratio test, lift testing efficiency.
To achieve the above object, the utility model embodiment provides following technical scheme：
A kind of DCR of Transformer and no-load voltage ratio test synthesis instrument, including：
Instrument shell；
It is embedded at the guidance panel on the surface of the Instrument shell；
The guidance panel includes：Three-phase high-voltage test lead and three-phase low-voltage test lead；The three-phase high-voltage test lead bag
Include four electric current junction blocks corresponding to three-phase high-voltage electric current, and four voltage link seats corresponding to three-phase high-voltage voltage；Described three
Phase low voltage experiment end includes：Three electric current junction blocks corresponding to three-phase low-voltage electric current, and three electricity corresponding to three-phase low-voltage voltage
Compression bonded line seat；
The Instrument shell is internally provided with：
Four electric current junction blocks corresponding with the three-phase high-voltage electric current of the three-phase high-voltage test lead, and the three-phase low-voltage
The current sampling circuit of three electric current junction block connections corresponding to the three-phase low-voltage electric current of test lead；
Four voltage link seats corresponding with the three-phase high-voltage voltage of the three-phase high-voltage test lead, and the three-phase low-voltage
The voltage sampling circuit of three voltage link seat connections corresponding to the three-phase low-voltage voltage of test lead；
The first analog to digital conversion circuit being connected with the current sampling circuit；
The second analog to digital conversion circuit being connected with the voltage sampling circuit；
The process chip being connected with first analog to digital conversion circuit and second analog to digital conversion circuit；
The operating circuit switching circuit being connected with the process chip；
The constant-current source generation electricity for producing the constant-current source needed for direct current direct resistance metering is connected with the operating circuit switching circuit
Road, produce the constant pressure source generative circuit of the constant pressure source needed for no-load voltage ratio test.
Optionally, the current sampling circuit includes：
Four electric current junction blocks corresponding with the three-phase high-voltage electric current of the three-phase high-voltage test lead, and the three-phase low-voltage
The electric current relay of three electric current junction block connections corresponding to the three-phase low-voltage electric current of test lead；
The current sampling resistor being connected with the electric current relay.
Optionally, the voltage sampling circuit includes：
Four voltage link seats corresponding with the three-phase high-voltage voltage of the three-phase high-voltage test lead, and the three-phase low-voltage
The voltage relay of three voltage link seat connections corresponding to the three-phase low-voltage voltage of test lead；
The voltage sample resistance being connected with the voltage relay.
Optionally, DCR of Transformer and no-load voltage ratio the test synthesis instrument also includes：
It is arranged at the first programmable amplifying circuit of the inside of the Instrument shell, the second programmable amplifying circuit, variable connector；
The current sampling circuit is connected to the first modulus by first programmable amplifying circuit and the variable connector
Change-over circuit；The voltage sampling circuit is connected to the second analog-to-digital conversion by the second programmable amplifying circuit and the variable connector
Circuit.
Optionally, the four electric current junction blocks and four voltage link seats of the three-phase high-voltage test lead, pass through survey respectively
Try the bushing end that cramp joint is tested transformer；The three electric current junction blocks and three voltage links of the three-phase high-voltage test lead
Seat is tested the low-tension bushing end of transformer by testing cramp joint respectively.
Optionally, the bushing end of the tested transformer is without neutral bushing, the electricity of the three-phase high-voltage test lead
It is hanging to flow the testing clamp of the neutral point junction block of junction block, the neutral point wiring of the voltage link seat of the three-phase high-voltage test lead
The testing clamp of seat is hanging.
Optionally, DCR of Transformer and no-load voltage ratio the test synthesis instrument also includes：
The USB interface being connected with process chip being arranged on guidance panel, be arranged on guidance panel with handle core
The instrument upgrade interface of piece connection, the panel for the printer being connected with process chip being arranged on guidance panel, is arranged at behaviour
Make the power interface on panel, the power switch for the control power interface being arranged on guidance panel, be arranged at operating surface
Ground terminal on plate, the display screen being connected with process chip being arranged on guidance panel, be arranged on guidance panel with
The control button of process chip connection.
Optionally, the display screen is full touch type technical grade color LCD screen.
Optionally, the Instrument shell can be waterproof injection-moulded housing.
Optionally, DCR of Transformer and no-load voltage ratio the test synthesis instrument also includes：
Hi-pot test line and low voltage experiment line；The length of Hi-pot test line is longer than low voltage experiment line.
The DCR of Transformer and no-load voltage ratio test synthesis instrument provided based on above-mentioned technical proposal, the utility model embodiment
Including：Instrument shell；It is embedded at the guidance panel on the surface of the Instrument shell；The guidance panel includes：Three-phase high-voltage is surveyed
Try end and three-phase low-voltage test lead；The three-phase high-voltage test lead includes four electric current junction blocks corresponding to three-phase high-voltage electric current,
With three-phase high-voltage voltage corresponding to four voltage link seats；The three-phase low-voltage test lead includes：Corresponding to three-phase low-voltage electric current
Three electric current junction blocks, and three voltage link seats corresponding to three-phase low-voltage voltage；
And in being internally provided with for Instrument shell：
Four electric current junction blocks corresponding with the three-phase high-voltage electric current of the three-phase high-voltage test lead, and the three-phase low-voltage
The current sampling circuit of three electric current junction block connections corresponding to the three-phase low-voltage electric current of test lead；
Four voltage link seats corresponding with the three-phase high-voltage voltage of the three-phase high-voltage test lead, and the three-phase low-voltage
The voltage sampling circuit of three voltage link seat connections corresponding to the three-phase low-voltage voltage of test lead；
The first analog to digital conversion circuit being connected with the current sampling circuit；
The second analog to digital conversion circuit being connected with the voltage sampling circuit；
The process chip being connected with first analog to digital conversion circuit and second analog to digital conversion circuit；
The operating circuit switching circuit being connected with the process chip；
The constant-current source generation electricity for producing the constant-current source needed for direct current direct resistance metering is connected with the operating circuit switching circuit
Road, produce the constant pressure source generative circuit of the constant pressure source needed for no-load voltage ratio test.
The DCR of Transformer and no-load voltage ratio test synthesis instrument provided by the utility model embodiment, one can be used
Instrument realizes DCR of Transformer test and no-load voltage ratio test, without direct-current resistance tester for transformer and transformer is respectively configured
No-load voltage ratio tester, greatly facilitates D.C. resistance and the no-load voltage ratio test of transformer, and is not required to be directed to DCR of Transformer
Tester and transformer voltage ratio tester are carried out testing preparation respectively and connect work of taking out stitches, and testing efficiency is lifted.Can
See, the utility model embodiment provides a kind of DCR of Transformer and no-load voltage ratio test synthesis instrument, can be easy realize transformer
D.C. resistance and no-load voltage ratio test, lifted testing efficiency.
Brief description of the drawings
, below will be to embodiment in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art
Or the required accompanying drawing used is briefly described in description of the prior art, it should be apparent that, drawings in the following description are only
It is embodiment of the present utility model, for those of ordinary skill in the art, on the premise of not paying creative work, also
Other accompanying drawings can be obtained according to the accompanying drawing of offer.
Fig. 1 is the surface of shell knot of the DCR of Transformer that the utility model embodiment provides and no-load voltage ratio test synthesis instrument
Structure schematic diagram；
Fig. 2 is the enclosure interior knot of the DCR of Transformer that the utility model embodiment provides and no-load voltage ratio test synthesis instrument
Structure schematic diagram；
Fig. 3 is the DCR of Transformer that the utility model embodiment provides and the enclosure interior of no-load voltage ratio test synthesis instrument
Another structural representation；
Fig. 4 is the DCR of Transformer that the utility model embodiment provides and the enclosure interior of no-load voltage ratio test synthesis instrument
Another structural representation；
Fig. 5 is the surface of shell of the DCR of Transformer that the utility model embodiment provides and no-load voltage ratio test synthesis instrument
Another structural representation.
Embodiment
The DCR of Transformer and no-load voltage ratio test synthesis instrument provided using the utility model embodiment, can be used a survey
Test instrument completes the integration test of DCR of Transformer and no-load voltage ratio test, so as to the D.C. resistance for realizing transformer of simplicity
And no-load voltage ratio test, lift testing efficiency.
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out
Clearly and completely describing, it is clear that described embodiment is only the utility model part of the embodiment, rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is made
The every other embodiment obtained, belong to the scope of the utility model protection.
Fig. 1 is the surface of shell knot of the DCR of Transformer that the utility model embodiment provides and no-load voltage ratio test synthesis instrument
Structure schematic diagram, Fig. 2 are the DCR of Transformer that the utility model embodiment provides and the enclosure interior of no-load voltage ratio test synthesis instrument
Structural representation, with reference to Fig. 1 and Fig. 2, the utility model embodiment DCR of Transformer provided and no-load voltage ratio test synthesis instrument
Structure can include：
Instrument shell 1 as shown in Figure 1；
The surface of Instrument shell 1 is embedded with guidance panel 2, i.e. guidance panel is embedded at the surface of Instrument shell；
Three-phase high-voltage test lead 21 and three-phase low-voltage test lead 22 are provided with the guidance panel 2；The three-phase high-voltage
Test lead 21 includes four electric current junction blocks (being respectively IA, IB, IC and IO), three-phase high-voltage voltage corresponding to three-phase high-voltage electric current
Corresponding four voltage link seats (being respectively UA, UB, UC and UO)；The three-phase low-voltage test lead 22 includes：Three-phase low-voltage electricity
Three electric current junction blocks (being respectively Ia, Ib and Ic) corresponding to stream, three voltage link seats corresponding to three-phase low-voltage voltage are (respectively
For Ua, Ub and Uc)；
Optionally, yellow mark can be used in the junction block of A phases, and green mark, the wiring of C phases can be used in the junction block of B phases
Red mark can be used in seat, and the junction block of O phases can use logos, and certainly, color configuration herein is only optional signal；
Optionally, also settable miscellaneous part on guidance panel, can be by being described below.
As shown in Fig. 2 in DCR of Transformer and no-load voltage ratio test synthesis instrument that the utility model embodiment provides, instrument
The inside of housing 1 can be set：
Current sampling circuit 3, the three-phase high-voltage electric current corresponding four of current sampling circuit 3 and the three-phase high-voltage test lead
Individual electric current junction block, with the three-phase low-voltage electric current of the three-phase low-voltage test lead corresponding to three electric current junction blocks connect；
Voltage sampling circuit 4, the three-phase high-voltage voltage corresponding four of voltage sampling circuit 4 and the three-phase high-voltage test lead
Individual voltage link seat, with the three-phase low-voltage voltage of the three-phase low-voltage test lead corresponding to three voltage link seats connect；
The first analog to digital conversion circuit 5 being connected with current sampling circuit 3；
The second analog to digital conversion circuit 6 being connected with voltage sampling circuit 4；
The process chip 7 being connected with the analog to digital conversion circuit 6 of the first analog to digital conversion circuit 5 and second；
Process chip 7 is also associated with operating circuit switching circuit 8；It is straight that the operating circuit switching circuit 8 is connected with generation
The constant-current source generative circuit 9 of the constant-current source needed for direct resistance metering is flowed, and produces the constant pressure source life of the constant pressure source needed for no-load voltage ratio test
Into circuit 10.
In the utility model embodiment, operating circuit switching circuit 8 can be subject to processing the control of chip 7, to control constant current
The work of source generative circuit 9 and constant pressure source generative circuit 10；When needing to carry out DCR of Transformer test, process chip 7
Controllable operating circuit switching circuit 8 causes constant-current source generative circuit 9 to work, and generating direct current by constant-current source generative circuit 9 directly hinders
Constant-current source needed for test, after constant-current source feeds back to transformer to be measured, by with transformer testing line or test clipper joint
Three-phase high-voltage test lead and three-phase low-voltage test lead, the voltage and current information of transformer is got, so as to pass through current sample
Circuit carry out current information sampling, by voltage sampling circuit carry out information of voltage sampling, the current information sampled and
Information of voltage after analog-to-digital conversion, imports process chip, direct current direct resistance metering result can be calculated by process chip respectively；
And when needing to carry out no-load voltage ratio test, process chip 7 can control operating circuit switching circuit 8 to cause constant pressure source generation
Circuit 10 works, and generates the constant pressure source needed for no-load voltage ratio test by constant pressure source generative circuit 10, constant pressure source feeds back to transformation to be measured
After device, by the three-phase high-voltage test lead and three-phase low-voltage test lead with transformer testing line or test clipper joint, change is got
The voltage and current information of depressor, so as to carry out the sampling of current information by current sampling circuit, pass through voltage sampling circuit
The sampling of information of voltage is carried out, the current information and information of voltage sampled after analog-to-digital conversion, imports process chip respectively,
No-load voltage ratio test result can be calculated by process chip.
It can be seen that DCR of Transformer and no-load voltage ratio test synthesis instrument that the utility model embodiment provides include：Instrument shell
Body；It is embedded at the guidance panel on the surface of the Instrument shell；The guidance panel includes：Three-phase high-voltage test lead and three-phase are low
Press test lead；The three-phase high-voltage test lead includes four electric current junction blocks corresponding to three-phase high-voltage electric current, and three-phase high-voltage
Four voltage link seats corresponding to pressure；The three-phase low-voltage test lead includes：Three electric current wiring corresponding to three-phase low-voltage electric current
Seat, and three voltage link seats corresponding to three-phase low-voltage voltage；
And in being internally provided with for Instrument shell：
Four electric current junction blocks corresponding with the three-phase high-voltage electric current of the three-phase high-voltage test lead, and the three-phase low-voltage
The current sampling circuit of three electric current junction block connections corresponding to the three-phase low-voltage electric current of test lead；
Four voltage link seats corresponding with the three-phase high-voltage voltage of the three-phase high-voltage test lead, and the three-phase low-voltage
The voltage sampling circuit of three voltage link seat connections corresponding to the three-phase low-voltage voltage of test lead；
The first analog to digital conversion circuit being connected with the current sampling circuit；
The second analog to digital conversion circuit being connected with the voltage sampling circuit；
The process chip being connected with first analog to digital conversion circuit and second analog to digital conversion circuit；
The operating circuit switching circuit being connected with the process chip；
The constant-current source generation electricity for producing the constant-current source needed for direct current direct resistance metering is connected with the operating circuit switching circuit
Road, produce the constant pressure source generative circuit of the constant pressure source needed for no-load voltage ratio test.
The DCR of Transformer and no-load voltage ratio test synthesis instrument provided by the utility model embodiment, one can be used
Instrument realizes DCR of Transformer test and no-load voltage ratio test, without direct-current resistance tester for transformer and transformer is respectively configured
No-load voltage ratio tester, greatly facilitates D.C. resistance and the no-load voltage ratio test of transformer, and is not required to be directed to DCR of Transformer
Tester and transformer voltage ratio tester are carried out testing preparation respectively and connect work of taking out stitches, and testing efficiency is lifted.Can
See, the utility model embodiment provides a kind of DCR of Transformer and no-load voltage ratio test synthesis instrument, can be easy realize transformer
D.C. resistance and no-load voltage ratio test, lifted testing efficiency.
Optionally, constant-current source generative circuit can include：Amplifier and MOS (metal oxide semiconductor,
Metal-oxide semiconductor (MOS)) pipe.
Optionally, constant pressure source generative circuit can include：Inverter controller and metal-oxide-semiconductor.
Optionally, Fig. 3 shows the DCR of Transformer and no-load voltage ratio test synthesis instrument of the utility model embodiment offer
Enclosure interior another structural representation, with reference to shown in Fig. 2 and Fig. 3, current sampling circuit that the inside of Instrument shell 1 is set
3 can include：
Four electric current junction blocks corresponding with the three-phase high-voltage electric current of the three-phase high-voltage test lead, and the three-phase low-voltage
The electric current relay 31 of three electric current junction block connections corresponding to the three-phase low-voltage electric current of test lead：
The current sampling resistor 32 being connected with the electric current relay 31；
The voltage sampling circuit 4 that the inside of Instrument shell 1 is set can include：
Four voltage link seats corresponding with the three-phase high-voltage voltage of the three-phase high-voltage test lead, and the three-phase low-voltage
The voltage relay 41 of three voltage link seat connections corresponding to the three-phase low-voltage voltage of test lead：
The voltage sample resistance 42 being connected with the voltage relay 41.
Optionally, Fig. 4 shows the DCR of Transformer and no-load voltage ratio test synthesis instrument of the utility model embodiment offer
Enclosure interior another structural representation, with reference to shown in Fig. 2 and Fig. 4, the inside of Instrument shell 1 can also be set：
First programmable amplifying circuit 11, the second programmable amplifying circuit 12, variable connector 13；Optionally, variable connector 13 is such as
The on-off circuit of multiselect one of two-way；
Wherein, current sampling circuit 3 is connected to the first mould by the first programmable amplifying circuit 11 and the variable connector 13
Number change-over circuit 5；Voltage sampling circuit 4 is connected to the second modulus by the second programmable amplifying circuit 12 and the variable connector 13
Change-over circuit 6.
Optionally, the structure of the current sampling circuit 3 shown in Fig. 4 and voltage sampling circuit 4 can also be realized as shown in Figure 3.
Optionally, the utility model embodiment can realize single D.C. resistance test, and individually no-load voltage ratio test, also may be used
Comprehensive D.C. resistance and no-load voltage ratio test are realized, with reference to shown in Fig. 1, under different testing requirements, the mode of connection can be as follows：
Single-phase transformer or single-phase PT test wiring：UA, UB, IA, IB junction block of three-phase high-voltage test lead, pass through respectively
Test the high-pressure side that cramp joint is tested transformer；Ia, Ib, Ua, Ub junction block of three-phase low-voltage test lead, respectively by testing cramp joint
The low-pressure end of tested transformer；
Single-phase CT tests wiring：UA, UB, IA, IB junction block of three-phase high-voltage test lead, connect the secondary of tested transformer
Side；Ia, Ib, Ua, Ub junction block of three-phase low-voltage test lead, the primary side of transformer is tested by testing cramp joint respectively；
Three-phase transformer tests wiring：UA, UB, UC, IA, IB, IC junction block of three-phase high-voltage test lead pass through survey respectively
High pressure A, B, C sleeve pipe that cramp joint is tested transformer is tried, Ia, Ib, Ic, Ua of three-phase low-voltage test lead, Ub, Uc pass through test respectively
Cramp joint is tested low pressure a, b, c sleeve pipe of transformer；
D.C. resistance tests wiring：UA, UB, UC, UO, IA, IB, IC, IO junction block of three-phase high-voltage test lead lead to respectively
High pressure A, B, C, O sleeve end for crossing the tested transformer of test cramp joint are (hanging by UO and IO testing clamp such as without neutral point O sleeve pipe
；I.e. described electric current wiring of the bushing end of tested transformer without neutral bushing, then the three-phase high-voltage test lead
The testing clamp of the neutral point junction block of seat is hanging, the survey of the neutral point junction block of the voltage link seat of the three-phase high-voltage test lead
Examination pincers are hanging), Ia, Ib, Ic, Ua of three-phase low-voltage test lead, Ub, Uc be tested respectively by testing cramp joint transformer low pressure a,
B, c sleeve ends；
D.C. resistance and no-load voltage ratio test wiring：Wiring is tested using above-mentioned D.C. resistance.
It can be seen that the utility model embodiment is torn open when entering the D.C. resistance of line transformer and no-load voltage ratio is tested without what is repeated
Wiring.
Optionally, Fig. 5 shows that another structure of the surface of shell of DCR of Transformer and no-load voltage ratio test synthesis instrument is shown
It is intended to, with reference to shown in Fig. 1 and Fig. 5, is also provided with the guidance panel 2 that the surface of Instrument shell 1 is embedded：
The USB interface 23 being connected with process chip；The USB interface 23 can external flash disk use, for storing test data；Can
Choosing, the flash disk of FAT or FAT32 forms can be used；
The instrument upgrade interface 24 being connected with process chip；Optionally, instrument upgrade interface 24 can be RS232 interface；
The panel 25 for the printer being connected with process chip；Optionally, the part of printer may be disposed at Instrument shell 1
Inside, and the surface of Instrument shell 1 can be arranged at by printing the faceplate parts such as outlet；
Power interface 26；Complete machine power switch and power outlet, fuse base are with power outlet one, protective tube specification
250V/3A, size are diameter 5mm × 20mm, should use the protective tube of same size；
Control the power switch 27 of the power interface 26；
Ground terminal 28；
The display screen 29 being connected with process chip；Optionally, display screen can be 320 × 240 lattice lcds, and band LED is carried on the back
Light, show actions menu and test result, it is preferred to use full touch type technical grade color LCD screen；
The control button 30 being connected with process chip；
Optionally, can be set in control button " ↑ ↓ " it is " upper and lower " key, selection is mobile or changes data；Set " ← → " be
" left and right " key, selection is mobile or changes data；" confirmation " key is set, to confirm current operation；" cancellation " key is set, to abandon working as
Preceding operation.
Optionally, in the utility model embodiment, Instrument shell can be waterproof injection-moulded housing.
Optionally, the utility model embodiment can also configure Hi-pot test line and low voltage experiment line, and pass through height
The length of pressure p-wire is longer than low voltage experiment line, to distinguish the Hi-pot test line of configuration and low voltage experiment line.
The DCR of Transformer and no-load voltage ratio test synthesis instrument that the utility model embodiment provides, realization that can be easy become
D.C. resistance and the no-load voltage ratio test of depressor, lift testing efficiency.
The foregoing description of the disclosed embodiments, professional and technical personnel in the field are enable to realize or new using this practicality
Type.A variety of modifications to these embodiments will be apparent for those skilled in the art, determine herein
The General Principle of justice can be real in other embodiments in the case where not departing from core concept or scope of the present utility model
It is existing.Therefore, the utility model is not intended to be limited to the embodiments shown herein, and be to fit to it is disclosed herein
Principle and the consistent most wide scope of features of novelty.
Claims (10)
1. a kind of DCR of Transformer and no-load voltage ratio test synthesis instrument, it is characterised in that including：
Instrument shell；
It is embedded at the guidance panel on the surface of the Instrument shell；
The guidance panel includes：Three-phase high-voltage test lead and three-phase low-voltage test lead；The three-phase high-voltage test lead includes three
Four electric current junction blocks corresponding to phase high-tension current, and four voltage link seats corresponding to three-phase high-voltage voltage；The three-phase is low
Pressure test lead includes：Three electric current junction blocks corresponding to three-phase low-voltage electric current, and three voltages connect corresponding to three-phase low-voltage voltage
Line seat；
The Instrument shell is internally provided with：
Four electric current junction blocks corresponding with the three-phase high-voltage electric current of the three-phase high-voltage test lead, and three-phase low-voltage test
The current sampling circuit of three electric current junction block connections corresponding to the three-phase low-voltage electric current at end；
Four voltage link seats corresponding with the three-phase high-voltage voltage of the three-phase high-voltage test lead, and three-phase low-voltage test
The voltage sampling circuit of three voltage link seat connections corresponding to the three-phase low-voltage voltage at end；
The first analog to digital conversion circuit being connected with the current sampling circuit；
The second analog to digital conversion circuit being connected with the voltage sampling circuit；
The process chip being connected with first analog to digital conversion circuit and second analog to digital conversion circuit；
The operating circuit switching circuit being connected with the process chip；
The constant-current source generative circuit for producing the constant-current source needed for direct current direct resistance metering, production are connected with the operating circuit switching circuit
Change than the constant pressure source generative circuit for testing required constant pressure source.
2. DCR of Transformer according to claim 1 and no-load voltage ratio test synthesis instrument, it is characterised in that the electric current is adopted
Sample circuit includes：
Four electric current junction blocks corresponding with the three-phase high-voltage electric current of the three-phase high-voltage test lead, and three-phase low-voltage test
The electric current relay of three electric current junction block connections corresponding to the three-phase low-voltage electric current at end；
The current sampling resistor being connected with the electric current relay.
3. DCR of Transformer according to claim 1 and no-load voltage ratio test synthesis instrument, it is characterised in that the voltage is adopted
Sample circuit includes：
Four voltage link seats corresponding with the three-phase high-voltage voltage of the three-phase high-voltage test lead, and three-phase low-voltage test
The voltage relay of three voltage link seat connections corresponding to the three-phase low-voltage voltage at end；
The voltage sample resistance being connected with the voltage relay.
4. DCR of Transformer and no-load voltage ratio test synthesis instrument according to claim any one of 1-3, it is characterised in that also
Including:
It is arranged at the first programmable amplifying circuit of the inside of the Instrument shell, the second programmable amplifying circuit, variable connector；
The current sampling circuit is connected to the first analog-to-digital conversion by first programmable amplifying circuit and the variable connector
Circuit；The voltage sampling circuit is connected to the second analog-to-digital conversion electricity by the second programmable amplifying circuit and the variable connector
Road.
5. DCR of Transformer according to claim 1 and no-load voltage ratio test synthesis instrument, it is characterised in that the three-phase is high
The four electric current junction blocks and four voltage link seats of test lead are pressed, are tested the bushing of transformer by testing cramp joint respectively
End；The three electric current junction blocks and three voltage link seats of the three-phase high-voltage test lead are tested transformation by testing cramp joint respectively
The low-tension bushing end of device.
6. DCR of Transformer according to claim 1 and no-load voltage ratio test synthesis instrument, it is characterised in that the tested change
Depressor
Bushing end without neutral bushing, the survey of the neutral point junction block of the electric current junction block of the three-phase high-voltage test lead
Examination pincers are hanging, and the testing clamp of the neutral point junction block of the voltage link seat of the three-phase high-voltage test lead is hanging.
7. DCR of Transformer according to claim 1 and no-load voltage ratio test synthesis instrument, it is characterised in that also include：
The USB interface being connected with process chip being arranged on guidance panel, it is arranged at connecting with process chip on guidance panel
The instrument upgrade interface connect, the panel for the printer being connected with process chip being arranged on guidance panel, is arranged at operating surface
Power interface on plate, the power switch for the control power interface being arranged on guidance panel, is arranged on guidance panel
Ground terminal, the display screen being connected with process chip being arranged on guidance panel, be arranged on guidance panel with processing
The control button of chip connection.
8. DCR of Transformer according to claim 7 and no-load voltage ratio test synthesis instrument, it is characterised in that the display screen
For full touch type technical grade color LCD screen.
9. DCR of Transformer according to claim 1 and no-load voltage ratio test synthesis instrument, it is characterised in that the instrument shell
Body can be waterproof injection-moulded housing.
10. DCR of Transformer according to claim 1 and no-load voltage ratio test synthesis instrument, it is characterised in that also include：
Hi-pot test line and low voltage experiment line；The length of Hi-pot test line is longer than low voltage experiment line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721128925.XU CN207181527U (en) | 2017-09-05 | 2017-09-05 | A kind of DCR of Transformer and no-load voltage ratio test synthesis instrument |
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| CN201721128925.XU CN207181527U (en) | 2017-09-05 | 2017-09-05 | A kind of DCR of Transformer and no-load voltage ratio test synthesis instrument |
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| CN207181527U true CN207181527U (en) | 2018-04-03 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109100591A (en) * | 2018-07-30 | 2018-12-28 | 国网辽宁省电力有限公司铁岭供电公司 | Overhead transmission line comprehensive test apparatus |
| CN112345831A (en) * | 2020-10-30 | 2021-02-09 | 广东电网有限责任公司广州供电局 | Direct-current resistance measuring device of ultra-high voltage transformer |
| CN113702687A (en) * | 2021-09-17 | 2021-11-26 | 广东电网有限责任公司江门供电局 | Double-clamp same-screen special clamp-on ammeter |
-
2017
- 2017-09-05 CN CN201721128925.XU patent/CN207181527U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109100591A (en) * | 2018-07-30 | 2018-12-28 | 国网辽宁省电力有限公司铁岭供电公司 | Overhead transmission line comprehensive test apparatus |
| CN109100591B (en) * | 2018-07-30 | 2021-04-20 | 国网辽宁省电力有限公司铁岭供电公司 | Overhead line comprehensive tester |
| CN112345831A (en) * | 2020-10-30 | 2021-02-09 | 广东电网有限责任公司广州供电局 | Direct-current resistance measuring device of ultra-high voltage transformer |
| CN112345831B (en) * | 2020-10-30 | 2023-01-20 | 广东电网有限责任公司广州供电局 | Direct-current resistance measuring device of ultra-high voltage transformer |
| CN113702687A (en) * | 2021-09-17 | 2021-11-26 | 广东电网有限责任公司江门供电局 | Double-clamp same-screen special clamp-on ammeter |
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