CN204166093U - A kind of DC break down voltage test circuit - Google Patents
A kind of DC break down voltage test circuit Download PDFInfo
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- CN204166093U CN204166093U CN201420660160.4U CN201420660160U CN204166093U CN 204166093 U CN204166093 U CN 204166093U CN 201420660160 U CN201420660160 U CN 201420660160U CN 204166093 U CN204166093 U CN 204166093U
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Abstract
The utility model discloses a kind of DC break down voltage test circuit, comprise product to be measured, AC power, adjustable resistance, transformer, fixed resistance, high-voltage rectification silicon stack, reometer and filter capacitor, the other end of one end of described AC power, a stiff end of described adjustable resistance, the sliding end of described adjustable resistance, the one end on the former limit of described transformer, the other end on the former limit of described transformer, another stiff end of described adjustable resistance and described AC power connects successively; The other end of the secondary of one end of the secondary of described transformer, fixed resistance, high-voltage rectification silicon stack, filter capacitor and transformer connects successively; The connecting to holding of one end of reometer and described high-voltage rectification silicon stack and filter capacitor is connected, the other end of reometer is connected with one end of product to be measured, holds the connecting of the secondary of the other end of described product to be measured and described filter capacitor and transformer ground connection after being connected.It can judge the insulation defect of product to be measured fast.
Description
Technical field
The utility model relates to a kind of voltage-withstand test circuit, particularly relates to a kind of DC break down voltage test circuit.
Background technology
DC break down voltage test is exposed under the electric circumstance of very severe by a product, as fruit product can also maintain normal condition under this severe electric circumstance, just can determine also necessarily can maintain very normal situation under normal environment.Under normal circumstances, protect at product design, production, product and after maintenance, all need to do voltage-withstand test, guarantee that product all meets safety standard in links.Different products has different technical specifications, is to be added on product by the voltage higher than normal work to test when DC break down voltage is tested substantially, and this voltage must continue one section of official hour.If parts are in official hour, its leakage current amount also keeps within the limits prescribed, just can determine that these parts operate under normal circumstances, should be very safe.And the excellent design of parts and select good insulating material that user can be protected to exempt to be subject to accidental shock,
Product is as in the manufacture process of various household electrical appliance, power switch, electric wire, transformer, connection terminal, high pressure bakelite electric appliance, motor etc., the bad meeting of manufacture craft is easy to cause insulation defect, produce shelf depreciation, can allow user's accidental shock time serious, voltage-withstand test carry out to dispatch from the factory product and the product that will come into operation very necessary.
Utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art, provides a kind of DC break down voltage test circuit, and its structure is simple, and cost is low, can judge the insulation defect of product to be measured quickly and accurately, is suitable for making volt-ampere characteristic simultaneously.
A kind of technical scheme realizing above-mentioned purpose is: a kind of DC break down voltage test circuit, comprises product to be measured, AC power, adjustable resistance, transformer, fixed resistance, high-voltage rectification silicon stack, reometer and filter capacitor, wherein:
The other end of one end of described AC power, a stiff end of described adjustable resistance, the sliding end of described adjustable resistance, the one end on the former limit of described transformer, the other end on the former limit of described transformer, another stiff end of described adjustable resistance and described AC power connects successively;
The other end of the secondary of one end of the secondary of described transformer, fixed resistance, high-voltage rectification silicon stack, filter capacitor and transformer connects successively;
The connecting to holding of one end of described reometer and described high-voltage rectification silicon stack and filter capacitor is connected, the other end of described reometer is connected with one end of product to be measured, holds the connecting of the secondary of the other end of described product to be measured and described filter capacitor and transformer ground connection after being connected.
Above-mentioned a kind of DC break down voltage test circuit, wherein, the secondary ground protection of described transformer.
Above-mentioned a kind of DC break down voltage test circuit, wherein, described transformer is air-core transformer.
Above-mentioned a kind of DC break down voltage test circuit, wherein, described product to be measured is power switch, electric wire, connection terminal or motor.
Have employed the technical scheme of a kind of DC break down voltage test circuit of the present utility model, namely the other end of a stiff end of one end of AC power, adjustable resistance, the sliding end of adjustable resistance, the one end on the former limit of transformer, the other end on the former limit of transformer, another stiff end of adjustable resistance and AC power connects successively; The other end of the secondary of one end of the secondary of transformer, fixed resistance, high-voltage rectification silicon stack, filter capacitor and transformer connects successively; The connecting to holding of one end of reometer and described high-voltage rectification silicon stack and filter capacitor is connected, the other end of described reometer is connected with one end of product to be measured, holds the connecting of the secondary of the other end of described product to be measured and described filter capacitor and transformer the technical scheme of ground connection after being connected.Its technique effect is: DC break down voltage test circuit structure of the present utility model is simple, cost is low, the insulation defect of product to be measured can be judged quickly and accurately, avoid producing accidental shock injury to user, be suitable for the volt-ampere characteristic making product to be measured simultaneously, the insulation quality of product to be measured can be analyzed according to volt-ampere characteristic further.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of DC break down voltage test circuit of the present utility model.
Embodiment
Utility model people of the present utility model, in order to understand the technical solution of the utility model better, below by embodiment particularly, and is described in detail by reference to the accompanying drawings:
Refer to Fig. 1, embodiment of the present utility model, a kind of DC break down voltage test circuit, comprise product X to be measured, AC power 1, adjustable resistance 2, transformer 3, fixed resistance 4, high-voltage rectification silicon stack 5, reometer 6 and filter capacitor 7.
The other end of one end of AC power 1, a stiff end of adjustable resistance 2, the sliding end of adjustable resistance 2, the one end on the former limit of transformer 3, the other end on the former limit of transformer 3, another stiff end of adjustable resistance 2 and AC power 1 connects successively, forms loop, former limit.The other end of the secondary of one end of the secondary of transformer 3, fixed resistance 4, high-voltage rectification silicon stack 5, filter capacitor 7 and transformer 3 connects successively, forms secondary loop.The connecting to holding of one end of reometer 6 and high-voltage rectification silicon stack 5 and filter capacitor 7 is connected, and the other end of reometer 6 is connected with one end of product X to be measured, holds the connecting of the secondary of the other end of product X to be measured and filter capacitor 7 and transformer 3 ground connection after being connected.The secondary ground protection of transformer 3.Preferably, transformer is air-core transformer.
Product X to be measured is power switch, electric wire, connection terminal or motor.
The principle of work of a kind of DC break down voltage of the utility model test circuit: AC power 1 forms loop, former limit through the former limit of transformer 3 and AC power 1 and adjustable resistance 2, the secondary of transformer 3, fixed resistance 4, high-voltage rectification silicon stack 5, filter capacitor 7 forms secondary loop, the voltage of AC power 1 is after transformer 3 step-down, pulsating direct current is formed by high-voltage rectification silicon stack 5 rectification, pulsating direct current is the stable direct current of output voltage values after filter capacitor 7 filtering, for product X to be measured provides direct current, when there is insulation defect in product X to be measured, pointer on reometer 6 can rotate.Regulate the resistance value of adjustable resistance 2, the DC voltage value in DC break down voltage test circuit can be changed, just can make the volt-ampere characteristic of product X to be measured, the insulation quality of product X to be measured can be analyzed according to volt-ampere characteristic further.
DC voltage withstand test belongs to insulation preventive trial, is also the one of destructive test.Test institute making alive is higher than the operating voltage of product to be measured, insulation test is very strict, especially easily disclose the centrality defect that those danger are larger, and can ensure that the insulation course of product has certain electric strength, DC break down voltage test circuit structure of the present utility model is simple, cost is low, the insulation defect of product to be measured can be judged quickly and accurately, avoid producing accidental shock injury to user, be suitable for the volt-ampere characteristic making product to be measured simultaneously, the insulation quality of product to be measured can be analyzed according to volt-ampere characteristic further.
Those of ordinary skill in the art will be appreciated that, above embodiment is only used to the utility model is described, and be not used as restriction of the present utility model, as long as in spirit of the present utility model, all will drop in Claims scope of the present utility model the change of the above embodiment, modification.
Claims (4)
1. a DC break down voltage test circuit, is characterized in that, comprises product to be measured, AC power, adjustable resistance, transformer, fixed resistance, high-voltage rectification silicon stack, reometer and filter capacitor, wherein:
The other end of one end of described AC power, a stiff end of described adjustable resistance, the sliding end of described adjustable resistance, the one end on the former limit of described transformer, the other end on the former limit of described transformer, another stiff end of described adjustable resistance and described AC power connects successively;
The other end of the secondary of one end of the secondary of described transformer, fixed resistance, high-voltage rectification silicon stack, filter capacitor and transformer connects successively;
The connecting to holding of one end of described reometer and described high-voltage rectification silicon stack and filter capacitor is connected, the other end of described reometer is connected with one end of product to be measured, holds the connecting of the secondary of the other end of described product to be measured and described filter capacitor and transformer ground connection after being connected.
2. a kind of DC break down voltage test circuit according to claim 1, is characterized in that, the secondary ground protection of described transformer.
3. a kind of DC break down voltage test circuit according to claim 1, is characterized in that, described transformer is air-core transformer.
4. a kind of DC break down voltage test circuit according to claim 1, is characterized in that, described product to be measured is power switch, electric wire, connection terminal or motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420660160.4U CN204166093U (en) | 2014-11-06 | 2014-11-06 | A kind of DC break down voltage test circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420660160.4U CN204166093U (en) | 2014-11-06 | 2014-11-06 | A kind of DC break down voltage test circuit |
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| Publication Number | Publication Date |
|---|---|
| CN204166093U true CN204166093U (en) | 2015-02-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420660160.4U Active CN204166093U (en) | 2014-11-06 | 2014-11-06 | A kind of DC break down voltage test circuit |
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| CN (1) | CN204166093U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104297653A (en) * | 2014-11-06 | 2015-01-21 | 国网上海市电力公司 | Direct current voltage resisting test circuit |
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2014
- 2014-11-06 CN CN201420660160.4U patent/CN204166093U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104297653A (en) * | 2014-11-06 | 2015-01-21 | 国网上海市电力公司 | Direct current voltage resisting test circuit |
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