CN204008925U - Electric Security Tester testing circuit - Google Patents
Electric Security Tester testing circuit Download PDFInfo
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- CN204008925U CN204008925U CN201420470457.4U CN201420470457U CN204008925U CN 204008925 U CN204008925 U CN 204008925U CN 201420470457 U CN201420470457 U CN 201420470457U CN 204008925 U CN204008925 U CN 204008925U
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- 238000012360 testing method Methods 0.000 title claims abstract description 60
- 238000005070 sampling Methods 0.000 claims abstract description 36
- 230000000630 rising effect Effects 0.000 claims abstract description 17
- 238000007689 inspection Methods 0.000 claims abstract description 8
- 238000004804 winding Methods 0.000 claims description 30
- 238000001914 filtration Methods 0.000 claims description 5
- 238000001514 detection method Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000003245 working effect Effects 0.000 description 1
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Abstract
The utility model discloses a kind of Electric Security Tester testing circuit, it comprises resistance test circuit and grounded inspection circuit; In described resistance test circuit, voltage source produces the needed voltage of voltage-withstand test and frequency by step-up transformer, and testing high voltage produces withstand voltage voltage sampling signal by sample resistance Rs1 and Rs2; Testing high voltage puts on generation current on tested body, and this electric current produces withstand voltage current sampling signal by sample resistance Rs; In described grounded inspection circuit, voltage source produces the needed electric current of earthing test and frequency by rising current transformer, and measuring current puts on product to be tested, and current transformer produces ground current sampled signal, voltage transformer (VT) produces ground voltage sampled signal.The utility model has been realized and has been carried out withstand voltage and earthing test simultaneously, saves the working time and has improved work efficiency.
Description
Technical field
The utility model designs a kind of Electric Security Tester, a kind of Electric Security Tester testing circuit of specific design.
Background technology
Electronic product (as electrical home appliances) or semi-manufacture (as electronic component) etc.; before the stage of coming into the market; must be through one safety standard test; in safety standard, comprise the specification such as proof voltage and stake resistance detection; and trouble free service personnel are in the time carrying out every electronic product or the test of half-finished safety, conventionally can test measuring thing with Electric Security Tester.The Electric Security Tester using at present can only withstand voltagely separately be tested with ground connection, cannot realize voltage-withstand test and stake resistance is tested simultaneously, has so greatly increased detection time, has reduced operating personnel's work efficiency.Such as the voltage-withstand test time is 2s, the earthing test time is 2s, and the so withstand voltage and complete required time of earthing test is at least 4s; If count the withstand voltage switching time to ground connection in, at least need the time of 4.5s.If can test simultaneously, the test duration only needs 2s can complete withstand voltage and test ground connection so, has saved like this working time and has also improved working effect simultaneously.
Summary of the invention
The purpose of this utility model is to provide a kind of Electric Security Tester testing circuit, realizes and carries out withstand voltage and earthing test simultaneously, saves the working time and has improved work efficiency.
The technical scheme that the utility model is taked is: a kind of Electric Security Tester testing circuit, it comprises resistance test circuit and grounded inspection circuit.In described resistance test circuit, the voltage output end of voltage source V s1 connects the former limit winding input end of step-up transformer, inferior limit winding high-end connection sampling resistor RS1 and the RS2 of step-up transformer, also the N of gang socket XS end and L hold simultaneously, the inferior limit winding low side of step-up transformer connects one end of sampling resistor RS, and the other end of sampling resistor RS is exported the G end of withstand voltage current sampling signal gang socket XS as withstand voltage current sample output terminal; Described sampling resistor RS1 is connected with series system with RS2, and the end that interconnects of sampling resistor RS1 and RS2 is exported withstand voltage voltage sampling signal as withstand voltage voltage sample output terminal.In described grounded inspection circuit, the voltage output end of voltage source V s2 connects the former limit winding input end of rising current transformer, the G end of the high-end gang socket XS of inferior limit winding of rising current transformer, winding low side connecting test folder one end, inferior limit of rising current transformer, in the circuit being connected with test clip one end at the inferior limit of rising current transformer winding low side, seal in current transformer, current transformer output ground current sampled signal; The other end of described test clip connects winding one end, the former limit of voltage transformer (VT), the G end of the other end gang socket XS of the former limit of voltage transformer (VT) winding, voltage transformer (VT) time limit winding output ground voltage sampled signal.
Preferably, between the G of described sampling resistor RS and socket XS end, be provided with current sample input port.
Preferably, described withstand voltage voltage sampling signal, withstand voltage current sampling signal, ground current sampled signal, ground voltage sampled signal output in the current rectifying and wave filtering circuit of Electric Security Tester.
Preferably, the no-load voltage ratio of described step-up transformer is 1:200, and the no-load voltage ratio of described rising current transformer is 25:6, and the no-load voltage ratio of described voltage transformer (VT) is 1:1.
The beneficial effects of the utility model are: realized voltage-withstand test and stake resistance is tested simultaneously, greatly reduced like this detection time, improved operating personnel's work efficiency, for enterprise has saved cost.
Brief description of the drawings
Fig. 1 is the integrated circuit block diagram of Electric Security Tester.
Fig. 2 is testing circuit connection layout of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail.
As depicted in figs. 1 and 2, a kind of Electric Security Tester testing circuit, it comprises resistance test circuit and grounded inspection circuit.In described resistance test circuit, the voltage output end of voltage source V s1 connects the former limit winding input end of step-up transformer, inferior limit winding high-end connection sampling resistor RS1 and the RS2 of step-up transformer, also the N of gang socket XS end (zero line input end) and L hold (live wire input end) simultaneously, the inferior limit winding low side of step-up transformer connects one end of sampling resistor RS, and the other end of sampling resistor RS is exported the G end (earth terminal) of withstand voltage current sampling signal gang socket XS as withstand voltage current sample output terminal.Described sampling resistor RS1 is connected with series system with RS2, and the end that interconnects of sampling resistor RS1 and RS2 is exported withstand voltage voltage sampling signal as withstand voltage voltage sample output terminal.
In described grounded inspection circuit, the voltage output end of voltage source V s2 connects the former limit winding input end of rising current transformer, the G end of the high-end gang socket XS of inferior limit winding of rising current transformer, winding low side connecting test folder one end, inferior limit of rising current transformer, in the circuit being connected with test clip one end at the inferior limit of rising current transformer winding low side, seal in current transformer, current transformer output ground current sampled signal.The other end of described test clip connects winding one end, the former limit of voltage transformer (VT), the G end of the other end gang socket XS of the former limit of voltage transformer (VT) winding, voltage transformer (VT) time limit winding output ground voltage sampled signal.
In the utility model, between the G end of sampling resistor RS and socket XS, be provided with current sample input port (RET).
Described withstand voltage voltage sampling signal, withstand voltage current sampling signal, ground current sampled signal, ground voltage sampled signal output in the current rectifying and wave filtering circuit of Electric Security Tester.
Before test, the attaching plug of product to be tested is inserted in to socket XS upper (socket XS is arranged on Electric Security Tester table), test clip is connected on the metal shell of product to be tested.In test process, by two voltage source V S1 of main controller controls and VS2; Voltage source V S1 produces the needed voltage of voltage-withstand test and frequency by step-up transformer; Testing high voltage produces withstand voltage voltage sampling signal by sample resistance Rs1 and Rs2; Testing high voltage puts on generation current on tested body, and this electric current produces withstand voltage current sampling signal by sample resistance Rs.Withstand voltage voltage sampling signal, withstand voltage current sampling signal are sent to A/D converter through overcommutation and filtering by signal and convert digital quantity to, and master controller shows by calculating digital quantity at display.Voltage source V S2 produces the needed electric current of earthing test and frequency by rising current transformer, and measuring current puts on product to be tested, and current transformer produces ground current sampled signal, voltage transformer (VT) produces ground voltage sampled signal.Ground current sampled signal, ground voltage sampled signal enter A/D converter through overcommutation and filtering signal and convert digital quantity to, and master controller shows by calculating digital quantity at display.
In test process, if the current value of voltage-withstand test is greater than setting value, tester can be immediately by high pressure cut-off and provide sound and light alarm.If the resistance of earthing test is greater than setting value, tester can cut off and provide sound and light alarm by the current value of earthing test immediately; Two tests are tested simultaneously but are independent of each other mutually.Wherein, voltage source V S1, VS2: its scope is 0-30Vac; The no-load voltage ratio of step-up transformer is 1:200, and maximum output voltage is 5000Vac; The no-load voltage ratio of rising current transformer is 25:6, and maximum output current is 32A; The index of current transformer is input 30A, output 3.5Vac; The no-load voltage ratio of voltage transformer (VT) is 1:1.
The utility model does not relate to partly all prior aries that maybe can adopt same as the prior art to be realized.
Claims (6)
1. an Electric Security Tester testing circuit, is characterized in that: it comprises resistance test circuit and grounded inspection circuit;
In described resistance test circuit, the voltage output end of voltage source V s1 connects the former limit winding input end of step-up transformer, inferior limit winding high-end connection sampling resistor RS1 and the RS2 of step-up transformer, also the N of gang socket XS end and L hold simultaneously, the inferior limit winding low side of step-up transformer connects one end of sampling resistor RS, and the other end of sampling resistor RS is exported the G end of withstand voltage current sampling signal gang socket XS as withstand voltage current sample output terminal; Described sampling resistor RS1 is connected with series system with RS2, and the end that interconnects of sampling resistor RS1 and RS2 is exported withstand voltage voltage sampling signal as withstand voltage voltage sample output terminal;
In described grounded inspection circuit, the voltage output end of voltage source V s2 connects the former limit winding input end of rising current transformer, the G end of the high-end gang socket XS of inferior limit winding of rising current transformer, winding low side connecting test folder one end, inferior limit of rising current transformer, in the circuit being connected with test clip one end at the inferior limit of rising current transformer winding low side, seal in current transformer, current transformer output ground current sampled signal; The other end of described test clip connects winding one end, the former limit of voltage transformer (VT), the G end of the other end gang socket XS of the former limit of voltage transformer (VT) winding, voltage transformer (VT) time limit winding output ground voltage sampled signal.
2. according to the Electric Security Tester testing circuit described in claim 1, it is characterized in that: between the G end of described sampling resistor RS and socket XS, be provided with current sample input port.
3. according to the Electric Security Tester testing circuit described in claim 1, it is characterized in that: described withstand voltage voltage sampling signal, withstand voltage current sampling signal, ground current sampled signal, ground voltage sampled signal output in the current rectifying and wave filtering circuit of Electric Security Tester.
4. according to the Electric Security Tester testing circuit described in claim 1, it is characterized in that: the no-load voltage ratio of described step-up transformer is 1:200.
5. according to the Electric Security Tester testing circuit described in claim 1, it is characterized in that: the no-load voltage ratio of described rising current transformer is 25:6.
6. according to the Electric Security Tester testing circuit described in claim 1, it is characterized in that: the no-load voltage ratio of described voltage transformer (VT) is 1:1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420470457.4U CN204008925U (en) | 2014-08-20 | 2014-08-20 | Electric Security Tester testing circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420470457.4U CN204008925U (en) | 2014-08-20 | 2014-08-20 | Electric Security Tester testing circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204008925U true CN204008925U (en) | 2014-12-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420470457.4U Expired - Lifetime CN204008925U (en) | 2014-08-20 | 2014-08-20 | Electric Security Tester testing circuit |
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| Country | Link |
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| CN (1) | CN204008925U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104897999A (en) * | 2015-06-18 | 2015-09-09 | 青岛艾诺智能仪器有限公司 | Comprehensive tester for electric appliance safety performance |
-
2014
- 2014-08-20 CN CN201420470457.4U patent/CN204008925U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104897999A (en) * | 2015-06-18 | 2015-09-09 | 青岛艾诺智能仪器有限公司 | Comprehensive tester for electric appliance safety performance |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20141210 |
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| CX01 | Expiry of patent term |