CN103545801B - A kind of test switch protecting circuit - Google Patents
A kind of test switch protecting circuit Download PDFInfo
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- CN103545801B CN103545801B CN201310473083.1A CN201310473083A CN103545801B CN 103545801 B CN103545801 B CN 103545801B CN 201310473083 A CN201310473083 A CN 201310473083A CN 103545801 B CN103545801 B CN 103545801B
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- power supply
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- Testing Relating To Insulation (AREA)
Abstract
The invention discloses a kind of test switch protecting circuit, belong to power protecting circuit technical field.Including input ac power L poles, input ac power N poles, DPTT double-pole triple throw switch SW, protection bulb LED, power supply product L input poles and power supply product N inputs pole；Also include the savings electrochemical capacitor EC in discharge resistance R and power supply product；Input ac power L poles are connected with DPTT double-pole triple throw switch SW; contact A 1 in DPTT double-pole triple throw switch SW is extremely connected by protection bulb LED with the contact A 2 in DPTT double-pole triple throw switch SW and power supply product L inputs; contact B3 in DPTT double-pole triple throw switch SW is connected by discharge resistance R with power supply product inside savings electrochemical capacitor EC, and input ac power N is extremely directly extremely connected with power supply product N inputs.The present invention be effectively protected power supply product test before and test after and input ac power it is without damage, shorten the manufacturing cycle of power supply product, improve power supply product reliability and quality.
Description
Technical field
The present invention relates to a kind of test switch protecting circuit, belong to power protecting circuit technical field.
Background technology
Current electronic product is more and more, and the supporting power supply of electronic product also one gushes, in the fabrication process, power supply
Corresponding all kinds of measurement jigs are also more and more, because all kinds of measurement jigs can only be powered work, are powered before testing often
Cause the direct aircraft bombing of bad products or cause other to damage, AC power can be damaged when serious, cause power supply product internal short-circuit,
The protective effect to power supply product and input ac power can not be played when component is anti-loaded, component is wrongly installed and is damaged；Test
Its internal electric charge provided in product work savings electrochemical capacitor cannot be discharged afterwards, and the electric charge of electrochemical capacitor the inside storage is being produced
Product meet other components and easily puncture other components when having enough to meet the need, when again to power supply product input ac power, also easily
Cause the direct aircraft bombing of power supply product or cause other to damage.So result in and existed very in the test link of power supply product
The phenomenon that big inconvenience and goods and materials are wasted, and subsequently repaired and operated and be also inconvenient, directly influence power supply product
Production efficiency and quality.
The content of the invention
For the problem that above-mentioned prior art is present, the present invention provides a kind of test switch protecting circuit, effectively protects
Shield power supply product is tested after preceding and test and input ac power is without damage.
To achieve these goals, this test includes input ac power L poles, input ac power with switch protecting circuit
N poles, DPTT double-pole triple throw switch SW, protection bulb LED, power supply product L input poles and power supply product N inputs pole；
Also include the savings electrochemical capacitor EC in discharge resistance R and power supply product；Input ac power L poles and DPTT double-pole triple throw
Switch SW connections, the contact A 1 in DPTT double-pole triple throw switch SW is by the contact A 2 in protection bulb LED and DPTT double-pole triple throw switch SW
Extremely it is connected with power supply product L inputs, the contact B3 in DPTT double-pole triple throw switch SW is by discharge resistance R and the savings of power supply product inside
Electrochemical capacitor EC is connected, and input ac power N is extremely directly extremely connected with power supply product N inputs.
Compared with prior art, this test is simple to operate with switch protecting circuit, easy to use, can effectively protect power supply
Product manufacture test before it internal short-circuit, component is anti-loaded, component is wrongly installed when do not damage power supply product and input AC
Power supply, while electric charge of the power supply product in product work savings electrochemical capacitor is provided after manufacturing test inside it is released
Put, and then protect power supply product without damage after test is manufactured, shorten the manufacturing cycle of power supply product, improve power supply
Production reliability and quality.
Brief description of the drawings
Fig. 1 is circuit theory diagrams of the invention.
Specific embodiment
The present invention will be further described below in conjunction with the accompanying drawings.
As shown in figure 1, this test switch protecting circuit includes input ac power L poles, input ac power N poles, double
The throw switch SW of knife three, protection bulb LED, power supply product L input poles and power supply product N inputs pole；
Also include the savings electrochemical capacitor EC in discharge resistance R and power supply product；Input ac power L poles and DPTT double-pole triple throw
Switch SW connections, the contact A 1 in DPTT double-pole triple throw switch SW is by the contact A 2 in protection bulb LED and DPTT double-pole triple throw switch SW
Extremely it is connected with power supply product L inputs, the contact B3 in DPTT double-pole triple throw switch SW is by discharge resistance R and the savings of power supply product inside
Electrochemical capacitor EC is connected, and input ac power N is extremely directly extremely connected with power supply product N inputs.
The relation between savings electrochemical capacitor EC in the discharge resistance R and power supply product, selection discharge resistance R
Size.Power supply product is powered off again after being powered and causing the savings electrochemical capacitor EC in power supply product to save has certain residual electricity
Lotus and can not consume automatically, the residual charge in savings electrochemical capacitor EC is bled off by discharge resistance R；Discharge resistance R resistances
The parameters such as size, power, actual capacitance, circuit voltage and permission discharge time in circuit are comprehensively chosen, its pass
It is to be：T=R*EC*Ln [(V0-V1)/(Vt-V1)], allows discharge time T：Millisecond, discharge resistance R：Ohm, in power supply product
Savings electrochemical capacitor EC：Microfarad, V0 is the initial voltage value on electric capacity；V1 is the magnitude of voltage that electric capacity can finally be put into；Vt is T
Magnitude of voltage on moment electric capacity；Ln () is with logarithm letter that (V0-V1)/(Vt-V1) is bottom.
This test is with the course of work of switch protecting circuit：Input ac power N poles are input into pole phase with power supply product N
Connect, input ac power L poles connect the A knives in DPTT double-pole triple throw switch SW, and power supply product is tested first, and A knives are thrown with contact A 1 and are connected,
Contact A 1 meets protection bulb LED, and protection bulb LED connects power supply product L inputs pole, and going up electricity first for power supply product provides protection；
When protecting bulb LED bright, illustrate power supply product internal short-circuit or component is anti-loaded, component is wrongly installed, now high current passes through
Protection bulb LED is discharged, and power supply product and input ac power are not damaged.When protection bulb LED is not bright, illustrate that power supply is produced
The A knives that DPTT double-pole triple throw is switched in SW are thrown with contact A 2 be connected immediately without reverse without short-circuit and component inside product, be that power supply is produced
Product provide through path when loading, and can be loaded directly into during test, the product of test passes by DPTT double-pole triple throw switch B knives in SW with
Contact B3 throws connection, and contact B3 meets discharge resistance R, and discharge resistance R connects the positive pole of electrochemical capacitor EC in power supply product, power supply product
The negative pole of middle electrochemical capacitor EC connects the B knives in DPTT double-pole triple throw switch SW, input ac power shut-off, the electrolysis electricity in power supply product
Hold EC electric discharges.B knives in DPTT double-pole triple throw switch SW are thrown with contact B1, B2 be connected respectively, and contact B1, B2 are in vacantly, do not act as
With；A knives in DPTT double-pole triple throw switch SW are thrown with contact A 3 be connected respectively, and A3 is in vacantly, does not work.It is achieved thereby that to electricity
The protection of product-derived, straight-through, electric discharge effect.
This test is simple to operate with switch protecting circuit, easy to use, can effectively protect power supply product to be tested in manufacture
It is preceding it internal short-circuit, power supply product and input ac power are not damaged when component is anti-loaded, component is wrongly installed, while power supply is produced
Electric charge of the product in product work savings electrochemical capacitor is provided after manufacturing test inside it is discharged, and then protects power supply
Product is without damage after test is manufactured, and shortens the manufacturing cycle of power supply product, improves power supply product reliability and quality.
Claims (1)
1. a kind of test switch protecting circuit, including input ac power L poles, input ac power N poles, DPTT double-pole triple throw switch
SW, protection bulb LED, power supply product L input poles and power supply product N inputs pole；
Characterized in that, also including the savings electrochemical capacitor EC in discharge resistance R and power supply product；Input ac power L poles with
DPTT double-pole triple throw switch SW connections, the contact A 1 in DPTT double-pole triple throw switch SW is by protection bulb LED and DPTT double-pole triple throw switch SW
Contact A 2 and power supply product L input be extremely connected, DPTT double-pole triple throw switchs contact B3 in SW by discharge resistance R and power supply product
Inside savings electrochemical capacitor EC is connected, and input ac power N is extremely directly extremely connected with power supply product N inputs；
The input ac power N poles connect with power supply product N inputs pole, and input ac power L poles meet DPTT double-pole triple throw switch SW
In A knives, A knives throw with contact A 1 and are connected, and contact A 1 meets protection bulb LED, and protection bulb LED connects power supply product L inputs pole；
A knives in the DPTT double-pole triple throw switch SW are thrown with contact A 2 and are connected, for power supply product loading provides through path；
B knives in the DPTT double-pole triple throw switch SW are thrown with contact B3 and are connected, and contact B3 meets discharge resistance R, and discharge resistance R connects power supply
The positive pole of electrochemical capacitor EC in product, the negative pole of electrochemical capacitor EC connects the B knives in DPTT double-pole triple throw switch SW in power supply product；
B knives in the DPTT double-pole triple throw switch SW are thrown with contact B1, B2 be connected respectively, and contact B1, B2 are in vacantly, do not act as
With；
A knives in the DPTT double-pole triple throw switch SW are thrown with contact A 3 and are connected, and A3 is in vacantly, does not work.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310473083.1A CN103545801B (en) | 2013-10-11 | 2013-10-11 | A kind of test switch protecting circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310473083.1A CN103545801B (en) | 2013-10-11 | 2013-10-11 | A kind of test switch protecting circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103545801A CN103545801A (en) | 2014-01-29 |
| CN103545801B true CN103545801B (en) | 2017-06-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310473083.1A Expired - Fee Related CN103545801B (en) | 2013-10-11 | 2013-10-11 | A kind of test switch protecting circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103545801B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201274580Y (en) * | 2008-09-16 | 2009-07-15 | 成都彩虹电器（集团）股份有限公司 | Safe heating apparatus used on flexible electric heating device |
| CN102435901A (en) * | 2011-10-28 | 2012-05-02 | 山东明华光电科技有限公司 | AC (alternating)/DC (direct current) power safety detector |
| CN203617701U (en) * | 2013-10-11 | 2014-05-28 | 徐州市恒源电器有限公司 | Test switch protection circuit |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100530875C (en) * | 2006-07-27 | 2009-08-19 | 鸿富锦精密工业（深圳）有限公司 | Electric equipment protecting means |
-
2013
- 2013-10-11 CN CN201310473083.1A patent/CN103545801B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201274580Y (en) * | 2008-09-16 | 2009-07-15 | 成都彩虹电器（集团）股份有限公司 | Safe heating apparatus used on flexible electric heating device |
| CN102435901A (en) * | 2011-10-28 | 2012-05-02 | 山东明华光电科技有限公司 | AC (alternating)/DC (direct current) power safety detector |
| CN203617701U (en) * | 2013-10-11 | 2014-05-28 | 徐州市恒源电器有限公司 | Test switch protection circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103545801A (en) | 2014-01-29 |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170606 Termination date: 20181011 |
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| CF01 | Termination of patent right due to non-payment of annual fee |