CN207571199U - Loop resistance and direct-current resistance tester for transformer - Google Patents
Loop resistance and direct-current resistance tester for transformer Download PDFInfo
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- CN207571199U CN207571199U CN201721364753.6U CN201721364753U CN207571199U CN 207571199 U CN207571199 U CN 207571199U CN 201721364753 U CN201721364753 U CN 201721364753U CN 207571199 U CN207571199 U CN 207571199U
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- 238000000465 moulding Methods 0.000 claims description 2
- 230000001131 transforming effect Effects 0.000 abstract description 4
- 238000005259 measurement Methods 0.000 description 9
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
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- 238000011161 development Methods 0.000 description 1
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- 238000002474 experimental method Methods 0.000 description 1
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Abstract
The utility model discloses a kind of loop resistance and direct-current resistance tester for transformer, including central control module, power rectifier module, precision resistance, gear change-over switch, inscribed multimeter, external multimeter interface, electric power incoming line binding post, loop circuit calibrating terminal and DCR of Transformer calibrating terminal, power rectifier module, precision resistance, gear change-over switch, inscribed multimeter, external multimeter and electric power incoming line binding post are connected to central control module, loop circuit calibrating terminal and DCR of Transformer calibrating terminal are connected to power rectifier module.The loop resistance and direct-current resistance tester for transformer of the utility model control the instrument for measuring DC resistance for measuring main transformer, distribution transforming and the contact resistance tester for measuring switch by the output of source current, under the premise of reaching equipment with two sets of test functions, increase equipment applicability, weight of equipment is reduced, reduces labor intensity.
Description
Technical field
The utility model is related to power test equipment technical field, in particular to a kind of loop resistance and transformer dc electricity
Hinder tester.
Background technology
Test transformer D.C. resistance and switch contact resistance need two different tests to set inside testing equipment at present
Standby, a set of equipment cannot test switch contact contact resistance and DCR of Transformer simultaneously.Therefore lead to testing crew existing
Field needs to carry two complete equipments when being tested, sometimes even more.
Easy to operate and lightweight, integrated development trend in view of existing testing crew, it is really necessary to provide one kind
The equipment for having both loop resistance test function and DCR of Transformer test function.
Utility model content
The purpose of the utility model is to provide a kind of loop resistance easy for installation, intensity is high and transformer dc electricity
Tester is hindered, while loop resistance test function and DCR of Transformer test function are provided.
To achieve the above object, during the loop resistance designed by the utility model and direct-current resistance tester for transformer include
Centre control module, the power rectifier module for being controlled by central control module output DC power supply, as internal calibration and
Measure the precision resistance of standard of comparison, the gear change-over switch being adjusted according to the resistance value of transformation winding, inscribed multimeter,
External multimeter interface, electric power incoming line binding post, loop circuit calibrating terminal and DCR of Transformer calibrating terminal, institute
State power rectifier module, the precision resistance, the gear change-over switch, the inscribed multimeter, the external multimeter
And the electric power incoming line binding post is connected to the central control module, the loop circuit calibrating terminal and the transformation
Device D.C. resistance calibrating terminal is connected to the power rectifier module.
Preferably, the central control module, the power rectifier module, the precision resistance and it is described in
It connects multimeter to be encapsulated in instrument box with panel, the gear change-over switch, the external multimeter interface, the electric power incoming line
Binding post, the loop circuit calibrating terminal and the DCR of Transformer calibrating terminal are arranged in the instrument box
On panel.
Preferably, the external multimeter interface, the electric power incoming line binding post are separately positioned on the instrument
The both sides of the upper panel of box.
Preferably, the loop circuit calibrating terminal, DCR of Transformer calibrating terminal difference
It is arranged on the both sides of the lower panels of the instrument box.
Preferably, the inscribed multimeter is arranged on the middle part of the instrument box, and the inscribed multimeter is shown
Display screen is embedded in the middle and upper part of the panel of the instrument box.
Preferably, the middle and lower part setting test adjusting knob of the panel of the instrument box.
Preferably, part top in the instrument box is equipped with article putting groove.
The beneficial effects of the utility model are：The loop resistance and direct-current resistance tester for transformer of the utility model will be surveyed
The contact resistance tester for measuring main transformer, the instrument for measuring DC resistance of distribution transforming and measurement switch is controlled by the output of source current,
Under the premise of reaching equipment with two sets of test functions, increase equipment applicability, reduce weight of equipment, it is strong to reduce worker's labour
Degree.
Description of the drawings
Fig. 1 is the structural representation of the loop resistance and direct-current resistance tester for transformer of the preferred embodiment of the utility model
Figure.
Fig. 2 is that the loop resistance of the preferred embodiment in the utility model and the layout structure of direct-current resistance tester for transformer show
It is intended to.
Each part numbers are as follows in figure：Central control module 10, power rectifier module 20, precision resistance 30, gear turn
Change switch 40, inscribed multimeter 50, external multimeter interface 60, electric power incoming line binding post 70, loop circuit calibrating terminal 80,
DCR of Transformer calibrating terminal 90, instrument box 100, test adjusting knob 110, article putting groove 120.
Specific embodiment
The utility model is described in further detail in the following with reference to the drawings and specific embodiments.
Referring to Fig. 1, during the loop resistance and direct-current resistance tester for transformer of the preferred embodiment in the utility model include
Entreat control module 10, power rectifier module 20, precision resistance 30, gear change-over switch 40, inscribed multimeter 50, external general-purpose
Table interface 60, electric power incoming line binding post 70, loop circuit calibrating terminal 80 and DCR of Transformer calibrating terminal 90, greatly
Power rectification module 20, precision resistance 30, gear change-over switch 40, inscribed multimeter 50, external multimeter interface 60 and power supply
Inlet wire binding post 70 is connected to central control module 10, and loop circuit calibrating terminal 80 and DCR of Transformer test connect
Terminal 90 is connected to power rectifier module 20.
Central control module 10 is mainly to the data analysis and control of entire tester.Power rectifier module 20 is to input
Alternating current according to central control module 10 requirement export DC power supply, for measure power supply use.Precision resistance 30 is for interior
The standard that portion calibrates and compares as measurement.Gear change-over switch 40 is according to the resistance value size of transformation winding, selection adjustment conjunction
Suitable gear.Inscribed external application table 50 is the external application table 50 being placed in inside tester, and central control module 10, as loop resistance
The capital equipment of measurement.External multimeter interface 60 is connected with central control module 10, external multimeter can be connected, as spare
Test equipment.Electric power incoming line binding post 70 is connected with central control module 10, can introduce external power supply (alternating current) and be controlled in center
Test power supply is provided under the control of molding block 10.Loop circuit calibrating terminal 80 and DCR of Transformer calibrating terminal 90
Power rectifier module 20 is connected to, external power supply is introduced as test power supply from central control module 10.
Referring to Fig. 2, central control module 10, power rectifier module 20, precision resistance 30, gear change-over switch 40,
Inscribed multimeter 50, external multimeter interface 60, electric power incoming line binding post 70, loop circuit calibrating terminal 80 and transformer are straight
Leakage resistance calibrating terminal 90 is accommodated in instrument box 100, central control module 10, power rectifier module 20, precision resistance
30 and inscribed multimeter 50 be encapsulated in inside instrument box 100 with panel, gear change-over switch 40, external multimeter interface 60, electricity
Source inlet wire binding post 70, loop circuit calibrating terminal 80 and DCR of Transformer calibrating terminal 90 are arranged in instrument box
On 100 panel.
Specifically, external multimeter interface 60, electric power incoming line binding post 70 are separately positioned on the upper panel of instrument box 100
The left and right sides；Loop circuit calibrating terminal 80, DCR of Transformer calibrating terminal 90 are separately positioned on instrument box 100
Lower panels the left and right sides；Inscribed multimeter 50 is arranged on the middle part of instrument box 100, and display screen setting is embedded in instrument box
The middle and upper part of 100 panel.The middle and lower part of the panel of instrument box 100 is provided with several test adjusting knobs 110, for testing
Adjusting and conversion in journey are used.It is arranged for the ease of storage, top part specially reserves article putting groove 120 in instrument box 100, can
It is used for storing various wiring.
The loop resistance for illustrating the preferred embodiment in the utility model respectively and direct-current resistance tester for transformer are surveyed below
The step of when amount loop resistance and DCR of Transformer.
When measuring loop resistance, wiring as follows：
A. power on line：In the state of power switch disconnection, 220/3A AC powers are introduced into electric power incoming line wiring
Column 70；
B. p-wire is connect：In the state of power switch disconnection, section is selected to be more than 10mm2Dedicated testing wire, will treat
It tests switching circuitry and turns round (C11, C12 current terminal and, P11, P12 voltage terminal) corresponding function by four end of tester and be connected to circuit
Circuit test binding post 80.
When inscribed multimeter 50 is qualified, interior appearance can be switched throw in inscribed multimeter select be inscribed multimeter 60 as
Test equipment；If when inscribed multimeter breaks down or wanting to improve measurement accuracy, can by direct current 100~1000mV of range,
The high accuracy number multimeter of internal resistance 10 is connected on external multimeter interface 60, and interior appearance switching is thrown external in the selection of external table
Table.
When starting to measure, first power turn-on switch, the instruction of trim voltage range upper end voltmeter should be in 4.5~5.5V models
It encloses, and lower end indicator light is bright；When adjusting electric current vernier knob makes ammeter I show value 100mV, output current 100A；Press number
Word table function button reads the show value V that digital table is stablized, according to panel R × D it is upper × 10 loop resistance measurement mark multiplying power
× 10 and unit 100~9K μ Ω/100A are calculated to get tested circuit (switching circuitry) resistance value.
Measure citing：Adjusting electric current vernier knob makes electric current I be shown as 100A, presses digital table function button and reads voltage
V shows 26.5, then switch circuit resistance is：26.5 × 10=26.5 μ Ω.
When measuring transformer D.C. resistance, wiring as follows：
A. power on line：In the state of power switch disconnection, 220V/3A AC powers are introduced into electric power incoming line wiring
Column 70；
B. p-wire is connect：In the state of power switch disconnection, section is selected to be more than 2.5mm2Dedicated testing wire, will treat
Test transformer winding turns round (C1, C2 current terminal and P1, P2 voltage terminal) corresponding function by four end of test equipment and is connected to transformation
Device D.C. resistance calibrating terminal 90.
The inscribed multimeter of selection is identical with loop resistance measurement with the selection mode of external multimeter.
When starting to measure, first power turn-on switch, trim voltage range upper end voltmeter is indicated in 4.5~5.5V ranges,
Lower end indicator light is bright；Selection measures electric current, and is adjusted to integer, and electric current has：100 μ Α, 1m Α, 10m Α, 100m Α, 1 Α, 10
Α etc. is several, adjusts one kind in the above-mentioned electric current of electric current coarse adjustment selection, makes electric current I show values maximum, then adjusts electric current fine tuning rotation
Button makes ammeter I show values for integer (i.e. the current value of the currently selected gear of electric current fine tuning)；Press digital table function button
The show value V that digital table is stablized is read, the disk instruction multiplying power of gear is currently located according to electric current coarse adjustment and unit is calculated,
Up to tested DC resistance of inductive winding value (unit is corresponding with gear)；Measurement finishes, disconnecting power switch, and by electric current coarse adjustment
It throws in discharge position.
The loop resistance and direct-current resistance tester for transformer of the utility model survey the D.C. resistance for measuring main transformer, distribution transforming
Instrument is tried and measures the contact resistance tester switched to control by the output of source current, to reach equipment with two sets of experiment work(
Under the premise of energy, increase equipment applicability, reduce weight of equipment, reduce labor intensity.
Compared with prior art, the loop resistance of the utility model and direct-current resistance tester for transformer at least have with
Lower advantage：
(1) it is exported by changing the electric current of equipment power supply, two sets or three sets of functions is provided to reach a set of supply unit
Power supply output design, to complete main transformer resistance measurement, distribution transforming resistance measurement, switch contact resistance measures；
(2) standby port (external multimeter interface 60), the self-contained digital display meter of instrument (inscribed general-purpose are considered in gauge outfit
Table 50) break down, can external digital multimeter use, to meet field condition use, and may be used high-precision outer
Connect digital multimeter improves Instrument measuring precision to improve.
Embodiment described above only expresses the several embodiments of the utility model, and description is more specific and detailed,
But it should not be interpreted as limiting the scope of the present invention.It should be pointed out that for the common of this field
For technical staff, without departing from the concept of the premise utility, various modifications and improvements can be made, these all belong to
In the scope of protection of the utility model.Therefore, the protection domain of the utility model patent should be determined by the appended claims.
Claims (7)
1. a kind of loop resistance and direct-current resistance tester for transformer, it is characterised in that：The loop resistance and transformer dc
Resistance meter includes central control module (10), is controlled by the high-power of the central control module (10) output DC power supply
Rectification module (20), as internal calibration and measure standard of comparison precision resistance (30), according to the resistance value of transformation winding into
The gear change-over switch (40) of row adjusting, inscribed multimeter (50), external multimeter interface (60), electric power incoming line binding post
(70), loop circuit calibrating terminal (80) and DCR of Transformer calibrating terminal (90), the power rectifier module
(20), the precision resistance (30), the gear change-over switch (40), the inscribed multimeter (50), the external multimeter
Interface (60) and the electric power incoming line binding post (70) are connected to the central control module (10), the loop circuit test
Binding post (80) and the DCR of Transformer calibrating terminal (90) are connected to the power rectifier module (20).
2. loop resistance according to claim 1 and direct-current resistance tester for transformer, it is characterised in that：The center control
Molding block (10), the power rectifier module (20), the precision resistance (30) and the inscribed multimeter (50) use panel
It is encapsulated in instrument box (100), the gear change-over switch (40), the external multimeter interface (60), the electric power incoming line
Binding post (70), the loop circuit calibrating terminal (80) and the DCR of Transformer calibrating terminal (90) are arranged in
On the panel of the instrument box (100).
3. loop resistance according to claim 2 and direct-current resistance tester for transformer, it is characterised in that：Described external ten thousand
The both sides of the upper panel of the instrument box (100) are separately positioned on table interface (60), the electric power incoming line binding post (70).
4. loop resistance according to claim 2 and direct-current resistance tester for transformer, it is characterised in that：The circuit electricity
Road calibrating terminal (80), the DCR of Transformer calibrating terminal (90) are separately positioned on the instrument box (100)
The both sides of lower panels.
5. loop resistance according to claim 2 and direct-current resistance tester for transformer, it is characterised in that：Described inscribed ten thousand
The middle part of the instrument box (100) is arranged on table (50), the display screen of the inscribed multimeter (50) is embedded in the instrument box
(100) middle and upper part of panel.
6. loop resistance according to claim 2 and direct-current resistance tester for transformer, it is characterised in that：The instrument box
(100) the middle and lower part setting test adjusting knob (110) of panel.
7. loop resistance and direct-current resistance tester for transformer according to any one of claim 2 to 6, feature exist
In：Top part is equipped with article putting groove (120) in the instrument box (100).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721364753.6U CN207571199U (en) | 2017-10-20 | 2017-10-20 | Loop resistance and direct-current resistance tester for transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721364753.6U CN207571199U (en) | 2017-10-20 | 2017-10-20 | Loop resistance and direct-current resistance tester for transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207571199U true CN207571199U (en) | 2018-07-03 |
Family
ID=62695772
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721364753.6U Active CN207571199U (en) | 2017-10-20 | 2017-10-20 | Loop resistance and direct-current resistance tester for transformer |
Country Status (1)
| Country | Link |
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| CN (1) | CN207571199U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109557377A (en) * | 2018-12-23 | 2019-04-02 | 武汉职业技术学院 | A kind of High-accuracy direct current resistance meter |
| CN111596132A (en) * | 2020-05-25 | 2020-08-28 | 广东电网有限责任公司东莞供电局 | DC resistance tester |
| CN114264880A (en) * | 2021-12-22 | 2022-04-01 | 国网山东省电力公司莘县供电公司 | Transformer test wiring change-over switch |
-
2017
- 2017-10-20 CN CN201721364753.6U patent/CN207571199U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109557377A (en) * | 2018-12-23 | 2019-04-02 | 武汉职业技术学院 | A kind of High-accuracy direct current resistance meter |
| CN109557377B (en) * | 2018-12-23 | 2024-04-30 | 武汉职业技术学院 | High-precision direct-current resistance tester |
| CN111596132A (en) * | 2020-05-25 | 2020-08-28 | 广东电网有限责任公司东莞供电局 | DC resistance tester |
| CN114264880A (en) * | 2021-12-22 | 2022-04-01 | 国网山东省电力公司莘县供电公司 | Transformer test wiring change-over switch |
| CN114264880B (en) * | 2021-12-22 | 2024-04-05 | 国网山东省电力公司莘县供电公司 | Transformer test wiring change-over switch |
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