CN204241608U - A kind of leakage current testing cassete - Google Patents
A kind of leakage current testing cassete Download PDFInfo
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- CN204241608U CN204241608U CN201420700464.9U CN201420700464U CN204241608U CN 204241608 U CN204241608 U CN 204241608U CN 201420700464 U CN201420700464 U CN 201420700464U CN 204241608 U CN204241608 U CN 204241608U
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- calibrating terminal
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- human body
- leakage current
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Abstract
The utility model discloses a kind of leakage current testing cassete, comprise insulation box body, insulation box body is provided with the first calibrating terminal, the second calibrating terminal, the 3rd calibrating terminal and the 4th calibrating terminal, first calibrating terminal and the second calibrating terminal are for being connected product to be measured, and the 3rd calibrating terminal and the 4th calibrating terminal are respectively used to oscillograph output voltage signal; Insulation box body in, the first calibrating terminal successively through simulated skin impedance, simulation inside of human body impedance after, be electrically connected with the second calibrating terminal; The two ends extraction voltage signal of the impedance of simulation inside of human body is to the 3rd calibrating terminal; One end of the impedance of simulation inside of human body also pulls out a wire, and after this wire is connected in series the first resistance, the first electric capacity successively, be electrically connected with the other end of the impedance of simulation inside of human body, the first electric capacity two ends extraction voltage signal is to the 4th calibrating terminal.The utility model is easy to operate, is easy to be connected to oscillograph, and whole electrical leakage voltage test value is accurate, accurate, and test process is safe and reliable.
Description
Technical field
The utility model relates to electrical equipment safety detection technology field, particularly a kind of leakage current testing cassete.
Background technology
Electric injury is commonly called as electric shock, refers to that a certain amount of electric current or electric energy are by human body, a kind of general caused and locality damage.Along with electrical equipment frequency of utilization in life is more and more higher, people also more and more know electric shock producing cause, therefore, people are when making electrical installation, more and more understand how safety utilization of electric power, but the electric shock phenomenon caused due to the defect of some electrical equipment own is but difficult to avoid, thus the electric shock-prevention safety detection of electrical equipment is become and be even more important.In the idea of most people, insulation of electrical installation body is nonconducting, but does not in fact almost have what insulating material to be definitely nonconducting.Any one insulating material, apply voltage at its two ends, always have certain electric current and pass through, the real component of this electric current is called leakage current, and this phenomenon is also called the leakage of insulator.So-called leakage current refers under not having fault to execute alive situation, and between the metal parts of electric product mutually insulated, or between band electrical accessory and ground connection part, the electric current formed by its surrounding medium or insulating surface is called leakage current.The leakage current examination of electrical equipment be the insulating property of a circuit or a system, be the leading indicator of product safety performance.This leakage current is exactly so-called contact leakage current in safety test, this leakage current is if not within the value range of safety, user is when daily use operates, the shell touching product will produce Danger Electric shock risk, this is because the leakage current of product forms loop through human body and ground, cause Danger Electric shock risk.
Hold, in order to avoid this shock hazard caused human body, the leakage current of product must be considered when product design, therefore, the leakage current test of electric product is seemed extremely important.In the prior art, the drain current test method of electrical equipment normally by oscillograph or multimeter, and utilizes the Simple circuit for testing of a simulation human body impedance to carry out testing, and its defect is: one, to be connected to oscillograph not convenient, not easy to operate; Two, the test value of whole electrical leakage voltage is not accurate enough; Three, test process is safe and reliable not.
Utility model content
The technical problems to be solved in the utility model is for above-mentioned the deficiencies in the prior art, there is provided a kind of leakage current testing cassete, this leakage current testing cassete more convenient operation, is easy to be connected to oscillograph, the test value of whole electrical leakage voltage is accurate, accurate, and test process is safe and reliable.
For solving the problems of the technologies described above, the technical solution of the utility model is: a kind of leakage current testing cassete, comprise insulation box body, insulation box body one end is provided with the first calibrating terminal and the second calibrating terminal, the insulation box body other end is provided with the 3rd calibrating terminal and the 4th calibrating terminal, described first calibrating terminal and the second calibrating terminal are for being connected the test position of product to be measured, and described 3rd calibrating terminal and the 4th calibrating terminal are respectively used to oscillograph output voltage signal; Insulation box body in, described first calibrating terminal successively through simulated skin impedance, simulation inside of human body impedance after, be electrically connected with the second calibrating terminal; The two ends extraction voltage signal of the impedance of described simulation inside of human body is to the 3rd calibrating terminal; One end of the impedance of described simulation inside of human body also pulls out a wire, and after this wire is connected in series the first resistance, the first electric capacity successively, be electrically connected with the other end of the impedance of simulation inside of human body, the two ends extraction voltage signal of this first electric capacity is to the 4th calibrating terminal.
Described first calibrating terminal and the second calibrating terminal are connected to the wire with crocodile clip.
Described 3rd calibrating terminal and the 4th calibrating terminal have an oscillograph socket, respectively for oscillograph grafting.
Described insulation box body comprises upper casing and lower casing, and this upper casing and lower casing are screwed connection.
The resistance of described first resistance is 10K Ω, and the capacitance of described first electric capacity is 0.022 μ F; The impedance of described simulated skin is formed by the second resistance and the second Capacitance parallel connection, and the resistance of this second resistance is 1.5K Ω, and the capacitance of described second electric capacity is 0.22 μ F; The impedance of described simulation inside of human body is the 3rd resistance, and the resistance of the 3rd resistance is 500 Ω.
The beneficial effects of the utility model are: one, the first calibrating terminal can be connected the test position of product to be measured easily with the second calibrating terminal, 3rd calibrating terminal and the 4th calibrating terminal can easily to oscillograph output voltage signals, easy to operate, be easy to be connected to oscillograph; Two, in insulation box body, by arranging the impedance of simulated skin, the impedance of simulation inside of human body, make the test value of whole electrical leakage voltage accurate, accurate; Three, test network is all closed in insulation shell, and test process is safer, more reliable.
Accompanying drawing explanation
Fig. 1 is one-piece construction of the present utility model (front) schematic diagram.
Fig. 2 is one-piece construction of the present utility model (reverse side) schematic diagram.
Fig. 3 is the utility model circuit structure diagram.
In figure: 1. insulate box body; 11. upper casings; 12. lower casings; 13. screws; 2. the first calibrating terminal; 3. the second calibrating terminal; 4. the 3rd calibrating terminal; 5. the 4th calibrating terminal; 6. there is the wire of crocodile clip.
Embodiment
Below in conjunction with accompanying drawing, structural principle of the present utility model and principle of work are described in further detail.
As depicted in figs. 1 and 2, the utility model is a kind of leakage current testing cassete, comprise insulation box body 1, insulation box body 1 one end is provided with the first calibrating terminal 2 and the second calibrating terminal 3, insulation box body 1 other end is provided with the 3rd calibrating terminal 4 and the 4th calibrating terminal 5, described first calibrating terminal 2 and the second calibrating terminal 3 are for being connected the test position of product (not shown) to be measured, and described 3rd calibrating terminal 4 and the 4th calibrating terminal 5 are respectively used to oscillograph (not shown) output voltage signal; Insulation box body 1 in, described first calibrating terminal 2 successively through simulated skin impedance, simulation inside of human body impedance after, be electrically connected with the second calibrating terminal 3; The two ends extraction voltage signal of the impedance of described simulation inside of human body is to the 3rd calibrating terminal 4; One end of the impedance of described simulation inside of human body also pulls out a wire, and this wire is connected in series the first resistance R successively
1, the first electric capacity C
1after, be electrically connected with the other end of the impedance of simulation inside of human body, this first electric capacity C
1two ends extraction voltage signal to the 4th calibrating terminal 5.
In technique scheme, described first calibrating terminal 2 and the second calibrating terminal 3 are connected to the wire 6 with crocodile clip, with the test position of clamping connection product to be measured more easily.Described 3rd calibrating terminal 4 and the 4th calibrating terminal 5 have an oscillograph socket, respectively for oscillograph grafting.Described insulation box body 1 comprises upper casing 11 and lower casing 12, and this upper casing 11 is fixedly connected with by screw 13 with lower casing 12.
In technique scheme, described first resistance R
1resistance be 10K Ω, described first electric capacity C
1capacitance be 0.022 μ F; The impedance of described simulated skin is by the second resistance R
swith the second electric capacity C
sbe formed in parallel, this second resistance R
sresistance be 1.5K Ω, described second electric capacity C
scapacitance be 0.22 μ F; The impedance of described simulation inside of human body is the 3rd resistance R
b, the 3rd resistance R
bresistance be 500 Ω.
Principle of operation of the present utility model is: the first calibrating terminal 2 is received and surveyed the earth terminal of product by (1), the second calibrating terminal 3 is received the positions such as the shell of surveying product or lead-out terminal; (2) the 3rd calibrating terminal 4 is connected oscillograph respectively with the 4th calibrating terminal 5; (3) product to be measured connected with the mains and start shooting, being detected the voltage signal of the 3rd calibrating terminal 4 and the output of the 4th calibrating terminal 5 by non-ripple device; (4) the 3rd calibrating terminal magnitude of voltage and the 4th calibrating terminal magnitude of voltage that arrive will be tested, respectively divided by 500 Ω, draw DC leakage current and the ac leakage stream of product to be measured, usually, the DC leakage current limit value drawn from the 3rd calibrating terminal is 2.0mA,, the ac leakage ductility limit value drawn from the 4th calibrating terminal is 0.7mA.
The above is only the utility model better embodiment, every above embodiment is done according to the technical solution of the utility model any trickle amendment, equivalent variations and modification, all belong in the scope of technical solutions of the utility model.
Claims (5)
1. a leakage current testing cassete, it is characterized in that: comprise insulation box body, insulation box body one end is provided with the first calibrating terminal and the second calibrating terminal, the insulation box body other end is provided with the 3rd calibrating terminal and the 4th calibrating terminal, described first calibrating terminal and the second calibrating terminal are for being connected the test position of product to be measured, and described 3rd calibrating terminal and the 4th calibrating terminal are respectively used to oscillograph output voltage signal; Insulation box body in, described first calibrating terminal successively through simulated skin impedance, simulation inside of human body impedance after, be electrically connected with the second calibrating terminal; The two ends extraction voltage signal of the impedance of described simulation inside of human body is to the 3rd calibrating terminal; One end of the impedance of described simulation inside of human body also pulls out a wire, and after this wire is connected in series the first resistance, the first electric capacity successively, be electrically connected with the other end of the impedance of simulation inside of human body, the two ends extraction voltage signal of this first electric capacity is to the 4th calibrating terminal.
2. leakage current testing cassete according to claim 1, is characterized in that: described first calibrating terminal and the second calibrating terminal are connected to the wire with crocodile clip.
3. leakage current testing cassete according to claim 1, is characterized in that: described 3rd calibrating terminal and the 4th calibrating terminal have an oscillograph socket, respectively for oscillograph grafting.
4. leakage current testing cassete according to claim 1, is characterized in that: described insulation box body comprises upper casing and lower casing, and this upper casing and lower casing are screwed connection.
5. leakage current testing cassete according to claim 1, is characterized in that: the resistance of described first resistance is 10K Ω, and the capacitance of described first electric capacity is 0.022 μ F; The impedance of described simulated skin is formed by the second resistance and the second Capacitance parallel connection, and the resistance of this second resistance is 1.5K Ω, and the capacitance of described second electric capacity is 0.22 μ F; The impedance of described simulation inside of human body is the 3rd resistance, and the resistance of the 3rd resistance is 500 Ω.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420700464.9U CN204241608U (en) | 2014-11-20 | 2014-11-20 | A kind of leakage current testing cassete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420700464.9U CN204241608U (en) | 2014-11-20 | 2014-11-20 | A kind of leakage current testing cassete |
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| Publication Number | Publication Date |
|---|---|
| CN204241608U true CN204241608U (en) | 2015-04-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420700464.9U Active CN204241608U (en) | 2014-11-20 | 2014-11-20 | A kind of leakage current testing cassete |
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| Country | Link |
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| CN (1) | CN204241608U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109358225A (en) * | 2018-10-09 | 2019-02-19 | 沃尔特电子（苏州）有限公司 | A kind of detection device of detection circuit and trolleybus to the earth insulation performance |
| CN110398686A (en) * | 2019-08-27 | 2019-11-01 | 杭州华春科技有限公司 | A kind of monitoring system of residual current action protector |
-
2014
- 2014-11-20 CN CN201420700464.9U patent/CN204241608U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109358225A (en) * | 2018-10-09 | 2019-02-19 | 沃尔特电子（苏州）有限公司 | A kind of detection device of detection circuit and trolleybus to the earth insulation performance |
| CN110398686A (en) * | 2019-08-27 | 2019-11-01 | 杭州华春科技有限公司 | A kind of monitoring system of residual current action protector |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |