CN202854238U - Portable transformer direct current resistance tester - Google Patents
Portable transformer direct current resistance tester Download PDFInfo
- Publication number
- CN202854238U CN202854238U CN 201220600497 CN201220600497U CN202854238U CN 202854238 U CN202854238 U CN 202854238U CN 201220600497 CN201220600497 CN 201220600497 CN 201220600497 U CN201220600497 U CN 201220600497U CN 202854238 U CN202854238 U CN 202854238U
- Authority
- CN
- China
- Prior art keywords
- circuit
- chip microcomputer
- single chip
- circuit board
- portable transformer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Landscapes
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
Abstract
The utility model provides the technical scheme of a portable transformer direct current resistance tester. The tester of the scheme comprises a shell with a display screen and a keyboard; a handle is arranged at the top part of the shell; a circuit board is arranged inside the shell; the circuit board is connected with test interfaces; the circuit board comprises a single chip microcomputer; the single chip microcomputer is connected with a constant current power supply circuit; the constant current power supply circuit is connected with a shunt circuit; the shunt circuit is respectively connected with a current sampling circuit, a voltage division circuit and the test interfaces; the current sampling circuit is connected with the single chip microcomputer; the voltage division circuit is connected with the single chip microcomputer via a voltage sampling circuit; and the single chip microcomputer is respectively connected with the display screen and the keyboard. The tester of the scheme is high in test precision, convenient in carrying and facilitates use by the staff.
Description
Technical field
The utility model relates to a kind of portable direct-current resistance tester for transformer.
Background technology
In the prior art, known technology is to repair at transformer, handing-over, during the conversion parted hair, the direct current resistance that needs measuring transformer, the most measuring accuracy of existing measuring method is not high, and is not easy to carry, bring great inconvenience to the staff, existing this is the existing weak point of prior art.
Summary of the invention
The purpose of this utility model is exactly for the existing deficiency of prior art, and a kind of technical scheme of portable transformer instrument for measuring DC resistance is provided, the tester of this scheme, and measuring accuracy is high, and is easy to carry, and is beneficial to the staff and uses.
This programme is achieved by the following technical measures: a kind of portable transformer instrument for measuring DC resistance, comprise the housing with display screen and keyboard, the characteristics of this programme are: described case top is provided with handle, enclosure interior is provided with circuit board, described circuit board is connected with test interface, described circuit board comprises a single-chip microcomputer, described single-chip microcomputer is connected with a constant-current power supply circuit, described constant-current power supply circuit is connected with a divided circuit, described divided circuit respectively with current sampling circuit, bleeder circuit, test interface connects, described current sampling circuit is connected with single-chip microcomputer, described bleeder circuit is connected with single-chip microcomputer by voltage sampling circuit, and described single-chip microcomputer is connected with keyboard with display screen respectively.Be provided with arc-suppression circuit between described divided circuit and the test interface.Described handle is connected with housing by hinge.
The beneficial effect of this programme can be learnt according to the narration to such scheme, owing in this scheme single-chip microcomputer is arranged, can control the constant direct supply of constant-current power supply circuit output and be added in Transformer Winding, produces voltage drop on the resistance of Transformer Winding.The current signal of current sampling circuit, voltage sampling circuit collection output and the voltage signal on the winding are delivered to single-chip microcomputer with corresponding signal, and then single-chip microcomputer is presented on the LCD MODULE by drawing the direct current resistance numerical value of winding after calculating; Arc-suppression circuit can carry out arc extinguishing when test products, prevent the electric arc influence measurement result; Test interface is used for being connected with Transformer Winding.This shows that the utility model compared with prior art has substantive distinguishing features and progress, the beneficial effect of its enforcement also is apparent.
Description of drawings
Fig. 1 is the structural representation of the utility model embodiment.
Fig. 2 is the electrical principle block diagram of the utility model embodiment.
Among the figure, 1 is housing, and 2 is display screen, and 3 is keyboard, and 4 is handle, 5 is circuit board, and 6 is test interface, and 7 is single-chip microcomputer, and 8 is constant-current power supply circuit, and 9 is divided circuit, 10 is bleeder circuit, and 11 is current sampling circuit, and 12 is voltage sampling circuit, and 13 is arc-suppression circuit.
Embodiment
For clearly demonstrating the technical characterstic of this programme, below by an embodiment, and in conjunction with its accompanying drawing, this programme is set forth.
Can find out by accompanying drawing, the portable transformer instrument for measuring DC resistance of this programme, comprise the housing 1 with display screen 2 and keyboard 3, described housing 1 top is provided with handle 4, housing 1 inside is provided with circuit board 5, described circuit board 5 is connected with test interface 6, described circuit board 5 comprises a single-chip microcomputer 7, described single-chip microcomputer 7 is connected with a constant-current power supply circuit 8, described constant-current power supply circuit 8 is connected with a divided circuit 9, described divided circuit 9 respectively with current sampling circuit 11, bleeder circuit 10, test interface 6 connects, described current sampling circuit 11 is connected with single-chip microcomputer 7, described bleeder circuit 10 is connected with single-chip microcomputer 7 by voltage sampling circuit 12, and described single-chip microcomputer 7 is connected with keyboard with display screen 2 respectively and is connected.Be provided with arc-suppression circuit 13 between described divided circuit 9 and the test interface 6.Described handle 4 is connected with housing 1 by hinge.
Claims (3)
1. portable transformer instrument for measuring DC resistance, comprise the housing with display screen and keyboard, it is characterized in that: described case top is provided with handle, enclosure interior is provided with circuit board, described circuit board is connected with test interface, described circuit board comprises a single-chip microcomputer, described single-chip microcomputer is connected with a constant-current power supply circuit, described constant-current power supply circuit is connected with a divided circuit, described divided circuit respectively with current sampling circuit, bleeder circuit, test interface connects, described current sampling circuit is connected with single-chip microcomputer, described bleeder circuit is connected with single-chip microcomputer by voltage sampling circuit, and described single-chip microcomputer is connected with keyboard with display screen respectively.
2. portable transformer instrument for measuring DC resistance according to claim 1 is characterized in that: be provided with arc-suppression circuit between described divided circuit and the test interface.
3. portable transformer instrument for measuring DC resistance according to claim 1, it is characterized in that: described handle is connected with housing by hinge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220600497 CN202854238U (en) | 2012-11-15 | 2012-11-15 | Portable transformer direct current resistance tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220600497 CN202854238U (en) | 2012-11-15 | 2012-11-15 | Portable transformer direct current resistance tester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202854238U true CN202854238U (en) | 2013-04-03 |
Family
ID=47985421
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220600497 Expired - Lifetime CN202854238U (en) | 2012-11-15 | 2012-11-15 | Portable transformer direct current resistance tester |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202854238U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104931786A (en) * | 2015-06-09 | 2015-09-23 | 苏州市华安普电力工程有限公司 | Tester for DC resistor |
| CN105353188A (en) * | 2015-12-08 | 2016-02-24 | 张志通 | External structure of transformer resistance tester |
-
2012
- 2012-11-15 CN CN 201220600497 patent/CN202854238U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104931786A (en) * | 2015-06-09 | 2015-09-23 | 苏州市华安普电力工程有限公司 | Tester for DC resistor |
| CN105353188A (en) * | 2015-12-08 | 2016-02-24 | 张志通 | External structure of transformer resistance tester |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202693702U (en) | General-purpose tester of transformer | |
| CN201344948Y (en) | Test instrument | |
| CN202854238U (en) | Portable transformer direct current resistance tester | |
| CN104049219A (en) | Automatic test instrument for power source test | |
| CN103454612B (en) | A kind of ammeter electrifying test device | |
| CN204008827U (en) | Quality of power supply on-line measurement instrument | |
| CN203337801U (en) | Novel conductance tester used for storage battery | |
| CN203299368U (en) | Current transformer calibration device | |
| CN206832889U (en) | A kind of direct-current resistance tester for transformer | |
| CN205484759U (en) | Intelligent DIY universal meter check gauge | |
| CN205049681U (en) | Multicore cable insulation , short -circuit detection device | |
| CN201837694U (en) | Wiring tester for electric energy metering device | |
| CN204740282U (en) | Multimeter | |
| CN103713183A (en) | CVT embedded power-grid voltage harmonic-wave monitoring system | |
| CN203595761U (en) | Detection device of lithium battery charger | |
| CN203069683U (en) | Online transformer transformation ratio testing device | |
| CN202649814U (en) | A portable characteristic tester of an intelligent controller | |
| CN202693673U (en) | Relay current detection apparatus | |
| CN201199266Y (en) | Checkout apparatus for relay protection experiment instrument | |
| CN201845045U (en) | Composite test pencil | |
| CN201629682U (en) | Portable power box | |
| CN206113963U (en) | Control moment gyro is automatic to be tested and smelts device always | |
| CN203465333U (en) | Practical-type digital multimeter | |
| CN204359845U (en) | DC welder output current voltage measuring apparatus | |
| CN102880212B (en) | Cable thermal cycling test voltage controller power source measure and control device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130403 |