CN104880606A - Loop resistance tester - Google Patents
Loop resistance tester Download PDFInfo
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- CN104880606A CN104880606A CN201510255938.2A CN201510255938A CN104880606A CN 104880606 A CN104880606 A CN 104880606A CN 201510255938 A CN201510255938 A CN 201510255938A CN 104880606 A CN104880606 A CN 104880606A
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- resistance tester
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Abstract
The invention discloses a loop resistance tester. The loop resistance tester comprises a power supply and power-saving control circuit, a primary power supply, a standby power supply, input equipment, a display screen, output equipment, a sampler, a current sampling loop, a voltage sampling loop, a current correction loop, a voltage correction loop, a work indicating lamp, and an MCU, the power supply and power-saving control circuit is connected with the primary power supply, the power supply and power-saving control circuit is connected with the MCU, the input equipment is connected with the MCU, the display screen is connected with the MCU, the output equipment is connected with the MCU, the sampler is connected with the MCU, the voltage sampling loop is connected with the voltage correction loop, and the current sampling loop is connected with the current correction loop. According to the high-precision loop resistance tester, MCU control is employed, a rotation mouse is employed for operation, the liquid crystal display is provided, the operation and the usage of the apparatus are simple and convenient, and test records can be stored in a random manner and printed instantly.
Description
Technical field
The present invention relates to electrical technology field, be specially a kind of circuit resistance tester.
Background technology
The conventional direct current resistance of QJ44 type both arms direct current bridge measuring transformer coil, the loop resistance of primary cut-out is generally adopted in electric system, and the measuring current of this kind of electric bridge is only mA level, be difficult to find that transformer coil galvanic circle cross-sectional area of conductor amasss the defect of minimizing.When measuring the loop resistance of high-voltage switch gear galvanic circle, owing to being subject to the impact of oxide layer between oil film and sound contact, the resistance value several times bigger than normal of measurement, mask real loop resistance value.Therefore, Electricity Department standard SD301-88 " exchanging 500KV electrical equipment hand-over and preventive test code " and new edition " electrical equipment preventive test code " the measurement electric current to isolating switch, disconnector loop resistance make the regulation being not less than 100A, to guarantee the accuracy of measuring.
Summary of the invention
The object of the present invention is to provide a kind of circuit resistance tester, to solve the problem proposed in above-mentioned background technology.
For achieving the above object, the invention provides following technical scheme: a kind of circuit resistance tester, comprise power supply and power-saving control circuit, primary power, back-up source, input equipment, display screen, output device, sampling thief, current sampling circuit, voltage sample loop, current correction loop, voltage correction loop, relay indicating light and MCU, described power supply and power-saving control circuit are connected with primary power, described power supply and power-saving control circuit are connected with MCU, described input equipment is connected with MCU, described display screen is connected with MCU, described output device is connected with MCU, described sampling thief is connected with MCU, described voltage sample loop is connected with voltage correction loop, described current sampling circuit is connected with current correction loop.
Preferably, power supply and power-saving control circuit are connected with back-up source.
Preferably, described sampling thief is connected with current sampling circuit.
Preferably, described sampling thief is connected with voltage sample loop.
Preferably, described display screen is LCDs.
Preferably, described input equipment is for rotating mouse.
Preferably, described output device is mini-printer.
Compared with prior art, the invention has the beneficial effects as follows: the high precision Loop resistance tester that this circuit resistance tester provides adopts MCU to control, use and rotate mouse action, and be equipped with LCDs, the operation of instrument is easy to use, can also store at random and immediately print for test record.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
In figure: 1, power supply and power-saving control circuit, 2, primary power, 3, back-up source, 4, input equipment, 5, display screen, 6, output device, 7, sampling thief, 8, current sampling circuit, 9, voltage sample loop, 10, current correction loop, 11, voltage correction loop, 12, relay indicating light and 13, MCU.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Refer to Fig. 1, the invention provides a kind of technical scheme: a kind of circuit resistance tester, comprise power supply and power-saving control circuit 1, primary power 2, back-up source 3, input equipment 4, display screen 5, output device 6, sampling thief 7, current sampling circuit 8, voltage sample loop 9, current correction loop 10, voltage correction loop 11, relay indicating light 12 and MCU13, described power supply and power-saving control circuit 1 are connected with primary power 2, described power supply and power-saving control circuit 1 are connected with MCU13, described input equipment 4 is connected with MCU13, described display screen 5 is connected with MCU13, described output device 6 is connected with MCU13, described sampling thief 7 is connected with MCU13, described voltage sample loop 9 is connected with voltage correction loop 11, described current sampling circuit 8 is connected with current correction loop 10.
Principle of work: during use, open primary power 2, relay indicating light 12 lights, then can normally work, voltage sample is taked in voltage sample loop 9, voltage correction loop 11 correction voltage sample, and sampling thief 7 passed to by voltage sample, MCU13 controls sampling thief 7, and display screen 5 control MCU13 is to reach the control course of work.
Although illustrate and describe embodiments of the invention, for the ordinary skill in the art, be appreciated that and can carry out multiple change, amendment, replacement and modification to these embodiments without departing from the principles and spirit of the present invention, scope of the present invention is by claims and equivalents thereof.
Claims (7)
1. a circuit resistance tester, comprises power supply and power-saving control circuit (1), primary power (2), back-up source (3), input equipment (4), display screen (5), output device (6), sampling thief (7), current sampling circuit (8), voltage sample loop (9), current correction loop (10), voltage correction loop (11), relay indicating light (12) and MCU (13), it is characterized in that: described power supply and power-saving control circuit (1) are connected with primary power (2), described power supply and power-saving control circuit (1) are connected with MCU (13), described input equipment (4) is connected with MCU (13), described display screen (5) is connected with MCU (13), described output device (6) is connected with MCU (13), described sampling thief (7) is connected with MCU (13), described voltage sample loop (9) is connected with voltage correction loop (11), and described current sampling circuit (8) is connected with current correction loop (10).
2. a kind of circuit resistance tester according to claim 1, is characterized in that: described power supply and power-saving control circuit (1) are connected with back-up source (3).
3. a kind of circuit resistance tester according to claim 1, is characterized in that: described sampling thief (7) is connected with current sampling circuit (8).
4. a kind of circuit resistance tester according to claim 1, is characterized in that: described sampling thief (7) is connected with voltage sample loop (9).
5. a kind of circuit resistance tester according to claim 1, is characterized in that: described display screen (5) is LCDs.
6. a kind of circuit resistance tester according to claim 1, is characterized in that: described input equipment (4) is for rotating mouse.
7. a kind of circuit resistance tester according to claim 1, is characterized in that: described output device (6) is mini-printer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510255938.2A CN104880606A (en) | 2015-05-19 | 2015-05-19 | Loop resistance tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510255938.2A CN104880606A (en) | 2015-05-19 | 2015-05-19 | Loop resistance tester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104880606A true CN104880606A (en) | 2015-09-02 |
Family
ID=53948173
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510255938.2A Pending CN104880606A (en) | 2015-05-19 | 2015-05-19 | Loop resistance tester |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104880606A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20220357380A1 (en) * | 2020-02-05 | 2022-11-10 | Megger Instruments Ltd | Measuring loop resistance |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19601548A1 (en) * | 1996-01-17 | 1997-07-24 | Siemens Ag | Digital ohmmeter |
| CN201364364Y (en) * | 2009-03-20 | 2009-12-16 | 温州市创力电子有限公司 | Internal resistance tester |
| CN102033195A (en) * | 2009-09-27 | 2011-04-27 | 湖北省电力试验研究院 | Device and method for measuring dynamic resistance of high-voltage circuit breaker |
| CN202149919U (en) * | 2011-08-02 | 2012-02-22 | 武汉市华天电力自动化有限责任公司 | High precision Loop resistance tester |
| CN202351327U (en) * | 2011-11-03 | 2012-07-25 | 杭州高电科技有限公司 | High precision circuit resistance tester |
| CN103487775A (en) * | 2013-09-09 | 2014-01-01 | 沈阳计量测试院 | Intelligent digital micro resistor standard device |
| CN103827680A (en) * | 2011-07-29 | 2014-05-28 | 施耐德电气It公司 | Systems and methods for current and voltage monitoring |
| CN204719136U (en) * | 2015-05-19 | 2015-10-21 | 苏州市华安普电力工程有限公司 | A kind of circuit resistance tester |
-
2015
- 2015-05-19 CN CN201510255938.2A patent/CN104880606A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19601548A1 (en) * | 1996-01-17 | 1997-07-24 | Siemens Ag | Digital ohmmeter |
| CN201364364Y (en) * | 2009-03-20 | 2009-12-16 | 温州市创力电子有限公司 | Internal resistance tester |
| CN102033195A (en) * | 2009-09-27 | 2011-04-27 | 湖北省电力试验研究院 | Device and method for measuring dynamic resistance of high-voltage circuit breaker |
| CN103827680A (en) * | 2011-07-29 | 2014-05-28 | 施耐德电气It公司 | Systems and methods for current and voltage monitoring |
| CN202149919U (en) * | 2011-08-02 | 2012-02-22 | 武汉市华天电力自动化有限责任公司 | High precision Loop resistance tester |
| CN202351327U (en) * | 2011-11-03 | 2012-07-25 | 杭州高电科技有限公司 | High precision circuit resistance tester |
| CN103487775A (en) * | 2013-09-09 | 2014-01-01 | 沈阳计量测试院 | Intelligent digital micro resistor standard device |
| CN204719136U (en) * | 2015-05-19 | 2015-10-21 | 苏州市华安普电力工程有限公司 | A kind of circuit resistance tester |
Non-Patent Citations (1)
| Title |
|---|
| 李楠 等: "回路电阻测试仪的使用与维护", 《仪器仪表用户》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20220357380A1 (en) * | 2020-02-05 | 2022-11-10 | Megger Instruments Ltd | Measuring loop resistance |
| US12019107B2 (en) * | 2020-02-05 | 2024-06-25 | Megger Instruments Ltd | Measuring loop resistance |
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Application publication date: 20150902 |
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