CN208270655U - A kind of transformer winding instrument for measuring DC resistance - Google Patents
A kind of transformer winding instrument for measuring DC resistance Download PDFInfo
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- CN208270655U CN208270655U CN201820767579.8U CN201820767579U CN208270655U CN 208270655 U CN208270655 U CN 208270655U CN 201820767579 U CN201820767579 U CN 201820767579U CN 208270655 U CN208270655 U CN 208270655U
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Abstract
A kind of transformer winding instrument for measuring DC resistance provided by the utility model, it is able to detect the manufacturing defect of transformer coil, separate control circuit control constant current source and signal acquisition circuit, it need not carry out plugging line by hand, using disposably wiring is carried out to transformer winding, commutation test is carried out in tester, reduces setting up time, the convenient degree and accuracy for improving operation improve the efficiency of D.C. resistance test.It is designed by knob, makes the operating experience of user more intuitive, improve the exterior aesthetics of equipment.Due to being provided with test box, dustproof cover, lid and tester case lid can mutually be fixed, preferable preservation and use environment can be provided for instrument for measuring DC resistance.If tester is impacted by external voltages such as induced electricities, after electric discharge device movement, only ceramic discharge tube is damaged, and just needs to change ceramic discharge tube, and ceramic discharge tube market value is low, easy to maintain at low cost.
Description
Technical field
The utility model relates to a kind of instrument for measuring DC resistance, in particular to a kind of transformer winding D.C. resistance test
Instrument belongs to resistance test equipment technical field.
Background technique
D.C. resistance test is transformer after overhaul, handover and changing tap switch, essential pilot project.It is logical
In normal situation, with the direct current of traditional method (bridge method and pressure decline method) measuring transformer winding and high-power inductive devices
Resistance is a time-consuming job.In order to change this situation, the work for shortening time of measuring and mitigation tester is negative
The instrument for measuring DC resistance carried on a shoulder pole and developed.Using High Speed Microcontroller as core, built-in rechargeable battery and charging circuit are used
High-speed a/d converter and programmable current source technology have reached unprecedented measurement effect and increasingly automated measurement function, tool
There is precision high, measurement range is wide, data stabilization, reproducible, strong antijamming capability, and defencive function is perfect.Charge/discharge speed is fast
The features such as.Instrument for measuring DC resistance is small in size, light-weight, easy to carry, and with measuring, rapid, easy to use, measurement accuracy is high
The features such as.It is the ideal equipment of measuring transformer winding and high-power inductive devices D.C. resistance.
The instrument for measuring DC resistance of the prior art is mainly used for the test of transformer winding D.C. resistance, is able to detect transformation
The manufacturing defect of device coil, such as selection are improper, failure welding, tap switch poor contact etc..But wiring must be carried out item by item
And test, AB is pressed when detection, BC, AC carry out wiring item by item and test.When transformer has multiple gears, each single item is all necessary
3 wiring are carried out, are operated very complicated；Existing instrument for measuring DC resistance is more smart expensive, is easily damaged in external pelivimetry, due to
Whole design is not reasonable, it is inconvenient to carry, be unfavorable for improve testing efficiency；Direct-current resistance tester for transformer is become at the scene
When depressor D.C. resistance is tested, since tester is longer to the charging time of transformer winding, frequently results in and surveyed after being completed
The remaining a large amount of residual charge of instrument is tried, completely shuts down immediately if do not discharged in tester, removes test connection, there are testers
The risk being hit with personnel's electric shock, also can not effectively monitor the voltage and current in tester test loop, it is often more important that
Direct-current resistance tester for transformer relies on manual operation, and when invading by external voltage, manual operation response speed is slower, voltage
Electric current flows directly into equipment, and tester moment invades by external voltage, and there are testers to suffer damage and operating personnel's electric shock
Risk.
In general, the instrument for measuring DC resistance of the prior art is primarily present following defect: first is that carrying out transformation
When device winding D.C. resistance is tested, it is necessary to AB is pressed, BC, AC carry out wiring item by item and test, when transformer has multiple gears,
Each single item must all carry out 3 wiring, operate very complicated；Second is that existing instrument for measuring DC resistance need it is preferable save and
Use environment is extremely easily damaged in external pelivimetry due to lacking safeguard measure appropriate, since whole design is not reasonable,
It is inconvenient to carry, be unfavorable for improve testing efficiency；Third is that direct-current resistance tester for transformer carries out DCR of Transformer at the scene
After being completed, the remaining a large amount of residual charge of tester, removing test connection, there are testers to be hit and personnel's electric shock
Risk also can not effectively monitor the voltage and current in tester test loop, and when invading by external voltage, manual operation is rung
Answer speed slower, voltage and current flows directly into equipment, and tester moment invades by external voltage, suffer damage there are tester and
The risk of operating personnel's electric shock.
Utility model content
In view of the deficiencies of the prior art, a kind of transformer winding instrument for measuring DC resistance provided by the utility model, can
The manufacturing defect of transformer coil, separate control circuit control constant current source and signal acquisition circuit are detected, to select to export
Sample AB, BC or AC, it is not necessary to carry out by hand plug line, using disposably to transformer winding carry out wiring, in tester
Commutation test is carried out, setting up time is greatly reduced, improves the convenient degree and accuracy of operation, improves D.C. resistance test
Efficiency.It is designed simultaneously by knob, the operating experience of user can be allowed more intuitive, improve the exterior aesthetics of equipment.
Due to being provided with test box, dustproof cover, lid and tester case lid can mutually be fixed, can be provided for instrument for measuring DC resistance
Preferable preservation and use environment.It may insure resistance meter not and will receive the faradic impact of substation or transformer
Adjacent regions have applied voltage test to constitute a threat to tester and cause tester impaired, have good protective effect.If surveyed
It tries instrument to be impacted by external voltages such as induced electricities, after electric discharge device movement, only ceramic discharge tube is damaged, and just needs to change ceramics
Discharge tube, and ceramic discharge tube market value is low, it is easy to maintain at low cost.
To reach the above technical effect, technical solution used by the utility model is as follows:
A kind of transformer winding instrument for measuring DC resistance, including test box, dustproof cover and the electricity being arranged in inside test box
Tester is hindered, resistance meter includes control panel, test device, test interface, input and output display device, gear adjusting rotation
Button, control panel are horizontally placed on the upper surface of test box, test interface are respectively arranged on control panel, input and output are shown
Device, gear adjusting knob, control panel and test box surround to form hollow box body, are provided with test device in hollow box body,
Test device includes signal acquisition circuit, MCU signal processing unit, constant current source and separate control circuit, test interface, letter
Number Acquisition Circuit, MCU signal processing unit are sequentially connected to realize sampling processing, separate control circuit and gear adjusting knob,
Constant current source, signal acquisition circuit are connected, the on-off of separate control circuit control constant current source and signal acquisition circuit,
MCU signal processing unit is connected with input and output display device.
A kind of transformer winding instrument for measuring DC resistance, further, gear adjusting knob by bridge take metal slide plate with
The input port of separate control circuit is connected.
A kind of transformer winding instrument for measuring DC resistance, further, test interface include A phase current interface, B phase current
Interface, C phase current interface and A phase voltage interface, B phase voltage interface, C phase voltage interface.
A kind of transformer winding instrument for measuring DC resistance is further respectively arranged with ceramics on each phase test interface and puts
Fulgurite and ground stud, each mutually measure in line are cased with a clamp on amperemeter as current monitor respectively.
A kind of transformer winding instrument for measuring DC resistance is further provided with interlock circuit, mutually in separate control circuit
Relay is provided on lock circuit, interlock circuit is to selected mutually carry out electric current and voltage sample.
A kind of transformer winding instrument for measuring DC resistance, further, test device further include A/D conversion chip, signal
Amplifier, MCU signal processing unit are connected by A/D conversion chip, signal amplifier with signal acquisition circuit.
A kind of transformer winding instrument for measuring DC resistance, further, test box is hinged with dustproof cover, outside test box
Wearing layer is provided on surface.
Compared with the prior art, the advantages of the utility model are:
1. a kind of transformer winding instrument for measuring DC resistance provided by the utility model, for transformer winding D.C. resistance
Test, is able to detect the manufacturing defect of transformer coil, for example selection is improper, failure welding, tap switch poor contact etc..Phase
Other control circuit control constant current source and signal acquisition circuit export sampling AB, BC or AC with selection, it is not necessary to carry out by hand
Line is plugged, using disposably wiring is carried out to transformer winding, commutation test is carried out in tester, when greatly reducing wiring
Between, the convenient degree and accuracy of operation are improved, the efficiency of D.C. resistance test is improved.It is designed simultaneously by knob, it can
To make the operating experience of user more intuitive, the exterior aesthetics of equipment are improved.
2. a kind of transformer winding instrument for measuring DC resistance provided by the utility model, due to being provided with test box, dust-proof
Lid, can mutually fix lid and tester case lid, and preferable preservation and use environment can be provided for instrument for measuring DC resistance,
In external pelivimetry due to taking safeguard measure appropriate, wearing layer is provided on the outer surface of test box, equipment is not allowed integrally
It is easy to damage, due to being provided with dustproof cover, the component inside tester can be protected, it is easy to carry, be conducive to improve testing efficiency.
3. a kind of transformer winding instrument for measuring DC resistance provided by the utility model has good protective effect.Examination
It tests after personnel come into operation the utility model, it can be ensured that resistance meter not will receive the faradic impact of substation,
Or transformer adjacent regions have applied voltage test to constitute a threat to tester and cause tester impaired, have good protection and make
With.
4. a kind of transformer winding instrument for measuring DC resistance provided by the utility model, has good economy.In the past
Tester damage is related to complicated internal structure, and it is high to return factory's maintenance cost.The utility model structure is simple, at low cost, but has
Standby reliable protecting effect, the cost that can be spent to avoid tester depot repair.If tester is by dispatches from foreign news agency such as induced electricities
Pressure impact, after electric discharge device movement, only ceramic discharge tube is damaged, and just needs to change ceramic discharge tube, and ceramic discharge tube
Market value is low, easy to maintain at low cost.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of transformer winding instrument for measuring DC resistance provided by the utility model.
Description of symbols: 1- test box, 2- dustproof cover, 3- resistance meter, 31- control panel, 32- test device,
33- test interface, 34- input and output display device, 35- gear adjusting knob.
Specific embodiment
With reference to the accompanying drawing, to a kind of technical solution of transformer winding instrument for measuring DC resistance provided by the utility model
It is further described, those skilled in the art is allow to better understand the utility model and can be practiced.
Referring to Fig. 1, a kind of transformer winding instrument for measuring DC resistance provided by the utility model, a kind of transformer winding is straight
Leakage resistance tester, it is characterised in that: including test box 1, dustproof cover 2 and the resistance meter 3 being arranged in inside test box 1；
Resistance meter 3 includes control panel 31, test device 32, test interface 33, input and output display device 34, shelves
Position adjusting knob 35, control panel 31 are horizontally placed on the upper surface of test box 1, are respectively arranged with test on control panel 31 and connect
Mouth 33, input and output display device 34, gear adjusting knob 35, control panel 31 are equipped with for selecting test transformer mutually electricity
The gear adjusting knob 35 of resistance, gear adjusting knob 35 are connected with separate control circuit, and separate control circuit is adjusted according to gear
Knob 35 controls constant current source with the on-off of signal acquisition circuit so that selected transformer is mutually powered and be sampled；
Control panel 31 and test box 1 surround to form hollow box body, and test device 32, test dress are provided in hollow box body
Setting 32 includes signal acquisition circuit, MCU signal processing unit, constant current source and separate control circuit, test interface 33, signal
Acquisition Circuit, MCU signal processing unit are sequentially connected to realize sampling processing, separate control circuit and gear adjusting knob 35,
Constant current source, signal acquisition circuit are connected, the on-off of separate control circuit control constant current source and signal acquisition circuit,
MCU signal processing unit is connected with input and output display device.A kind of transformer winding D.C. resistance provided by the utility model
Tester, for transformer winding D.C. resistance test, is able to detect the manufacturing defect of transformer coil, for example selection is improper,
Failure welding, tap switch poor contact etc..
As a preferred embodiment, a kind of transformer winding instrument for measuring DC resistance provided by the utility model, gear tune
Section knob 35 takes metal slide plate by bridge and is connected with the input port of separate control circuit.It is designed by knob, Ke Yirang
The operating experience of user is more intuitive, improves the exterior aesthetics of equipment.
As a preferred embodiment, a kind of transformer winding instrument for measuring DC resistance provided by the utility model, test connect
Mouth 33 includes A phase current interface, B phase current interface, C phase current interface and A phase voltage interface, B phase voltage interface, C phase voltage
Interface, A phase voltage interface, A phase current interface are connected with transformer A；B phase voltage interface, B phase current interface and transformer B
It is connected；C phase voltage interface, C phase current interface are connected with transformer A；When test AB phase, constant current source exports an electricity
Stream passes through A winding and B winding from the port A, arrives the port B, return to constant current source, this intermediate samples circuit is to electric current and voltage
It is sampled.Separate control circuit control constant current source and signal acquisition circuit export sampling AB, BC or AC with selection,
It need not carry out plugging line by hand, using disposably wiring is carried out to transformer winding, commutation test be carried out in tester, significantly
Reduce setting up time, improve the convenient degree and accuracy of operation, improves the efficiency of D.C. resistance test.
As a preferred embodiment, a kind of transformer winding instrument for measuring DC resistance provided by the utility model, it is each mutually to survey
It tries and is respectively arranged with ceramic discharge tube and ground stud on mouth, is cased with one respectively as current monitor in each mutually measurement line
Clamp on amperemeter.After testing crew comes into operation the utility model, it can be ensured that resistance meter not will receive substation
Faradic impact or transformer adjacent regions have applied voltage test to constitute a threat to tester and cause tester impaired, tool
Standby good protective effect.Previous tester damage is related to complicated internal structure, and it is high to return factory's maintenance cost.The utility model
Structure is simple, at low cost, but has reliable protecting effect, the cost that can be spent to avoid tester depot repair.If surveyed
It tries instrument to be impacted by external voltages such as induced electricities, after electric discharge device movement, only ceramic discharge tube is damaged, and just needs to change ceramics
Discharge tube, and ceramic discharge tube market value is low, it is easy to maintain at low cost.
As a preferred embodiment, a kind of transformer winding instrument for measuring DC resistance provided by the utility model, separate control
It is provided with interlock circuit on circuit processed, relay is provided on interlock circuit, interlock circuit is to selected mutually carry out electric current and electricity
Pressure sampling.Setting interlock circuit can effectively avoid false retrieval, be controlled using relay, the functional reliability of tester mentions significantly
It is high.
As a preferred embodiment, a kind of transformer winding instrument for measuring DC resistance provided by the utility model, test dress
Setting 32 further includes A/D conversion chip, signal amplifier, MCU signal processing unit by A/D conversion chip, signal amplifier with
Signal acquisition circuit is connected.
As a preferred embodiment, a kind of transformer winding instrument for measuring DC resistance provided by the utility model, test box 1
It is hinged with dustproof cover 2, is provided with wearing layer on the outer surface of test box 1.Due to being provided with test box, dustproof cover, can incite somebody to action
Lid is mutually fixed with tester case lid, preferable preservation and use environment can be provided for instrument for measuring DC resistance, in external pelivimetry
When due to taking safeguard measure appropriate, wearing layer is provided on the outer surface of test box, equipment is integrally less likely to be damaged, by
In being provided with dustproof cover, the component inside tester can be protected, it is easy to carry, be conducive to improve testing efficiency.
The basic principles and main features and advantage of the utility model have been shown and described above.Although having been shown and retouching
The embodiments of the present invention are stated, for the ordinary skill in the art, it is possible to understand that practical new not departing from this
A variety of change, modification, replacement and modification, the utility model can be carried out to these embodiments in the case where the principle and spirit of type
Range be defined by the appended claims and the equivalents thereof.
Claims (7)
1. a kind of transformer winding instrument for measuring DC resistance, it is characterised in that: exist including test box (1), dustproof cover (2) and setting
The internal resistance meter (3) of the test box (1), the resistance meter (3) includes control panel (31), test device
(32), test interface (33), input and output display device (34), gear adjusting knob (35), the control panel (31) are horizontal
It is set to the upper surface of the test box (1), is respectively arranged with test interface (33), input and output on the control panel (31)
Display device (34), gear adjusting knob (35), the control panel (31) and the test box (1) are surrounded to form hollow box
Body is provided with the test device (32) in hollow box body, and the test device (32) includes signal acquisition circuit, MCU signal
Processing unit, constant current source and separate control circuit, the test interface (33), signal acquisition circuit, MCU signal processing list
Member is sequentially connected to realize that sampling processing, the separate control circuit are adopted with gear adjusting knob (35), constant current source, signal
Collector is connected, the on-off of separate control circuit control constant current source and signal acquisition circuit, the MCU signal processing unit
It is connected with input and output display device.
2. a kind of transformer winding instrument for measuring DC resistance according to claim 1, it is characterised in that: the gear is adjusted
Knob (35) takes metal slide plate by bridge and is connected with the input port of the separate control circuit.
3. a kind of transformer winding instrument for measuring DC resistance according to claim 1, it is characterised in that: the test interface
It (33) include A phase current interface, B phase current interface, C phase current interface and A phase voltage interface, B phase voltage interface, C phase voltage
Interface.
4. a kind of transformer winding instrument for measuring DC resistance according to claim 3, it is characterised in that: each phase test interface
On be respectively arranged with ceramic discharge tube and ground stud, is cased with one respectively as the pincerlike electric of current monitor in each mutually measurement line
Flow table.
5. a kind of transformer winding instrument for measuring DC resistance according to claim 1, it is characterised in that: the separate control
It is provided with interlock circuit on circuit, relay is provided on the interlock circuit, the interlock circuit is to selected mutually progress electricity
Stream and voltage sample.
6. a kind of transformer winding instrument for measuring DC resistance according to claim 1, it is characterised in that: the test device
It (32) further include A/D conversion chip, signal amplifier, the MCU signal processing unit is amplified by A/D conversion chip, signal
Device is connected with signal acquisition circuit.
7. a kind of transformer winding instrument for measuring DC resistance according to claim 1, it is characterised in that: the test box
(1) it is hinged with the dustproof cover (2), is provided with wearing layer on the outer surface of the test box (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820767579.8U CN208270655U (en) | 2018-05-22 | 2018-05-22 | A kind of transformer winding instrument for measuring DC resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820767579.8U CN208270655U (en) | 2018-05-22 | 2018-05-22 | A kind of transformer winding instrument for measuring DC resistance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208270655U true CN208270655U (en) | 2018-12-21 |
Family
ID=64685368
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820767579.8U Active CN208270655U (en) | 2018-05-22 | 2018-05-22 | A kind of transformer winding instrument for measuring DC resistance |
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| Country | Link |
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| CN (1) | CN208270655U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110456160A (en) * | 2019-08-20 | 2019-11-15 | 保定市森茂科技有限公司 | Super-pressure three-phase transformer D.C. resistance test method and test device |
-
2018
- 2018-05-22 CN CN201820767579.8U patent/CN208270655U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110456160A (en) * | 2019-08-20 | 2019-11-15 | 保定市森茂科技有限公司 | Super-pressure three-phase transformer D.C. resistance test method and test device |
| CN110456160B (en) * | 2019-08-20 | 2021-11-30 | 保定市森茂科技有限公司 | Method and device for testing direct current resistance of ultrahigh voltage three-phase transformer |
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