CN102916385B - Instrument testing protective device - Google Patents
Instrument testing protective device Download PDFInfo
- Publication number
- CN102916385B CN102916385B CN201110219269.5A CN201110219269A CN102916385B CN 102916385 B CN102916385 B CN 102916385B CN 201110219269 A CN201110219269 A CN 201110219269A CN 102916385 B CN102916385 B CN 102916385B
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- CN
- China
- Prior art keywords
- relay
- voltage
- current
- protective device
- normally closed
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- 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.)
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- 238000012360 testing method Methods 0.000 title claims abstract description 21
- 230000001681 protective effect Effects 0.000 title claims abstract description 11
- 230000006837 decompression Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 claims description 2
- 230000006378 damage Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Abstract
The invention discloses an instrument testing protective device. The instrument testing protective device comprises an IJ400-500mA current relay, a VJ100-120V voltage relay and an alarm bell. In cases of short circuit, grounding and electric shock of a test wire, the instrument testing protective device automatically cuts off power and alarms to notify a tester of short circuit, grounding and electric shock of a test circuit and the like, so that the safety of both the tester and test equipment is protected.
Description
Technical field
The present invention relates to electrical apparatus test field.
Background technology
When carrying out instrument appliance test at the scene in the past; because test lead is longer, often can there is operator on duty and touch test lead and cause short circuit or grounding phenomenon, and when there is this kind of situation; there is no corresponding protective device, cause personnel to come to harm or cause testing equipment to damage.
Summary of the invention
In order to solve the technical problem produced in above-mentioned experiment work, invent a kind of instrument test protective device.
Technical scheme of the present invention is: this device is made up of IJ400-500mA current relay, VJ100-120V voltage relay and alarm bell.It is characterized in that: current relay (1) is connected with the normal opened contact (4) of voltage relay; the normally closed contact (5) of voltage relay is attempted by voltage circuit after connecting with alarm bell (6), and the normally closed contact (2) of current relay is attempted by after connecting with voltage relay (3) and voltage circuit forms a kind of instrument tests protective device.
The feature of this device is: voltage circuit is short-circuited, ground connection or by can the power supply in off voltage loop at once during human body grounding.
The invention has the beneficial effects as follows: this device circuit structure is simple, easy to use, ensures safety.
accompanying drawing illustrates:
Fig. 1 is the anatomical connectivity schematic diagram of instrument of the present invention test protective device.
1-current relay in figure; The normally closed contact of 2-current relay; 3-voltage relay; The normal opened contact of 4-voltage relay; The normally closed contact of 5-voltage relay; 6-alarm bell; 7-by school voltage.
specific embodiments:
The input of this device is connected on the voltage output end of instrument commissioning device, and the output of proterctive equipment is connected with the voltage input end of calibrated meter meter.
After this experimental rig correct wiring, the electric current flow through in instrument coil is very little, only has 300mA, can not make overcurrent relay action, and verification loop voltage normally works.If when there is short circuit, ground connection, electric shock in wiring in process of the test; electric current in loop will increase to more than 450mA; at this moment the electric current increased in loop is by the current coil (1) of overcurrent relay; make overcurrent relay action; the normally closed contact (2) of overcurrent relay disconnects; voltage relay (3) decompression; voltage relay normal opened contact (4) disconnects; voltage relay normally closed contact (5) closes; alarm bell (6) is reported to the police; disconnected by school voltage (7), protection test equipment and personal safety.
Claims (1)
1. an instrument test protective device, it is characterized in that: this device is by IJ400-500mA current relay, VJ100-120V voltage relay and alarm bell composition, the coil of current relay (1) is connected with the normal opened contact (4) of voltage relay, the normally closed contact (5) of voltage relay is attempted by voltage circuit after connecting with alarm bell (6), be attempted by after the normally closed contact (2) of current relay and the coils connected in series of voltage relay (3) and voltage circuit forms a kind of instrument test protective device, when there is line fault in instrument process of the test, electric current in loop increases, and the electric current after increasing passes through the current coil (I) of current relay (1), make current relay action, the normally closed contact (2) of current relay (1) disconnects, voltage relay (3) decompression, voltage relay (3) normal opened contact (4) disconnects, voltage relay (3) normally closed contact (5) closes, alarm bell (6) is reported to the police, disconnected by school voltage (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110219269.5A CN102916385B (en) | 2011-08-02 | 2011-08-02 | Instrument testing protective device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110219269.5A CN102916385B (en) | 2011-08-02 | 2011-08-02 | Instrument testing protective device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102916385A CN102916385A (en) | 2013-02-06 |
| CN102916385B true CN102916385B (en) | 2015-04-22 |
Family
ID=47614668
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110219269.5A Active CN102916385B (en) | 2011-08-02 | 2011-08-02 | Instrument testing protective device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102916385B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106486964A (en) * | 2016-12-19 | 2017-03-08 | 贺州学院 | A kind of Intelligent socket |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB996640A (en) * | 1963-06-22 | 1965-06-30 | Shinko Electric Co Ltd | Automatic welding device for use in testing multi-conductor cables |
| CN201118199Y (en) * | 2007-08-21 | 2008-09-17 | 江西铜业集团公司 | Electric current earthing centralized monitoring apparatus |
| CN101393249A (en) * | 2007-09-19 | 2009-03-25 | 中国铝业股份有限公司 | Combination overvoltage protector test equipment |
| CN201662616U (en) * | 2010-02-10 | 2010-12-01 | 桐庐县供电局 | Online monitor ammeter calibration device of lightning arrester |
| CN201681138U (en) * | 2010-03-26 | 2010-12-22 | 彭发荣 | Lightweight type generator power-frequency alternating-current withstand voltage tester |
| CN201868841U (en) * | 2010-12-01 | 2011-06-15 | 李桐 | Low-voltage blocked overcurrent protection circuit |
-
2011
- 2011-08-02 CN CN201110219269.5A patent/CN102916385B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB996640A (en) * | 1963-06-22 | 1965-06-30 | Shinko Electric Co Ltd | Automatic welding device for use in testing multi-conductor cables |
| CN201118199Y (en) * | 2007-08-21 | 2008-09-17 | 江西铜业集团公司 | Electric current earthing centralized monitoring apparatus |
| CN101393249A (en) * | 2007-09-19 | 2009-03-25 | 中国铝业股份有限公司 | Combination overvoltage protector test equipment |
| CN201662616U (en) * | 2010-02-10 | 2010-12-01 | 桐庐县供电局 | Online monitor ammeter calibration device of lightning arrester |
| CN201681138U (en) * | 2010-03-26 | 2010-12-22 | 彭发荣 | Lightweight type generator power-frequency alternating-current withstand voltage tester |
| CN201868841U (en) * | 2010-12-01 | 2011-06-15 | 李桐 | Low-voltage blocked overcurrent protection circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102916385A (en) | 2013-02-06 |
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| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |