Typical withstand voltage test capability verification sample

Abstract

The invention provides a typical withstand voltage test capability verification sample, one end of a first branch, one end of a second branch and one end of a third branch are respectively provided with a first node, a second node and a third node, the other ends of the first branch, the second branch and the third branch are connected in parallel to a common node, the first branch comprises a first resistor and a first capacitor, and the second branch comprises a second resistor and a second capacitor. The first branch comprises a first resistor and a first capacitor which are connected in parallel, the second branch comprises a second resistor and a second capacitor which are connected in parallel, and the third branch comprises a third resistor and a third capacitor which are connected in series; a typical withstand voltage test capability verification sample is formed through simple resistor and capacitor combination, statistical analysis of the verification sample is processed by adopting a robust statistical technology, and the verification sample can be used for evaluating the withstand capability of an electrical equipment insulating material under high voltage and verifying whether the insulating material can bear certain voltage without breakdown or damage or not. Therefore, the safety and reliability of the electrical equipment are ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of safety testing of electrical products, and particularly to a typical verification sample for withstand voltage testing ability. Background Art

[0002] As a key test item for electrical products, the withstand voltage test involves audio and video equipment, information electronic equipment, household electrical appliances, lamps, and medical devices; the test principle of the withstand voltage test is to apply a high voltage between the live part of the equipment and the shell / ground for a certain period of time; the test voltage is usually much higher than the rated working voltage of the equipment to simulate the insulation performance under extreme conditions. During the test, it is observed whether the insulating material can withstand the voltage without breakdown or whether the leakage current exceeds the standard.

[0003] Regarding the withstand voltage performance of equipment or products in relation to their working voltage, insulation type, and environmental pollution level, if the withstand voltage performance is poor, it will cause equipment breakdown and electric shock to the human body, bringing serious product safety problems and endangering people's lives and property safety; therefore, the withstand voltage test has always been the focus of product supervision and product quality control. Summary of the Invention

[0004] The purpose of the present invention is to provide a typical verification sample for withstand voltage testing ability, which has a simple structure and can accurately judge the insulation defects of the product to be tested.

[0005] In order to achieve the above purpose, the technical solution of the present invention is as follows:

[0006] A typical verification sample for withstand voltage testing ability includes a first branch, a second branch, and a third branch. One ends of the first branch, the second branch, and the third branch are respectively provided with a first node, a second node, and a third node. The other ends of the first branch, the second branch, and the third branch are connected in parallel to a common node. The first branch includes a first resistor and a first capacitor, and the first resistor and the first capacitor are connected in parallel. The second branch includes a second resistor and a second capacitor, and the second resistor and the second capacitor are connected in parallel. The third branch includes a third resistor and a third capacitor, and the third resistor and the third capacitor are connected in series.

[0007] Further, the value of the first resistor is 400 kΩ, the value of the second resistor is 210 kΩ, and the value of the third resistor is 42 kΩ;

[0008] The value of the first capacitor is 1.23×10 -8 F, the value of the second capacitor is 1.84×10 -8 F, and the value of the third capacitor is 9.42×10 -8 F.

[0009] The present invention constitutes a typical withstand voltage test ability verification sample through a simple combination of resistors and capacitors. The statistical analysis of the verification sample is processed using robust statistical techniques, which can be used to evaluate the withstand ability of the insulating material of electrical equipment under high voltage, and can quickly and accurately verify whether the insulating material can withstand a certain voltage without breakdown or damage, thereby ensuring the safety and reliability of electrical equipment. Description of the Drawings

[0010] Figure 1 It is a circuit schematic diagram of the present invention.

[0011] Reference Signs:

[0012] 1 First Branch, 2 Second Branch, 3 Third Branch;

[0013] R1 First Resistor, R2 Second Resistor, R3 Third Resistor,

[0014] C1 First Capacitor, C2 Second Capacitor, C3 Third Capacitor,

[0015] A First Node, B Second Node, C Third Node, D Common Node. Detailed Embodiment

[0016] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0017] This embodiment discloses a typical withstand voltage test ability verification sample, as Figure 1 shown, including a first branch 1, a second branch 2 and a third branch 3. One ends of the first branch 1, the second branch 2 and the third branch 3 are respectively provided with a first node A, a second node B and a third node C, and the first branch 1, the second branch 2 and the third branch 3 are connected in parallel to a common node D.

[0018] The first branch 1 includes a first resistor R1 and a first capacitor C1, the first resistor R1 and the first capacitor C1 are connected in parallel, the second branch 2 includes a second resistor R2 and a second capacitor C2, the second resistor R2 and the second capacitor C2 are connected in parallel, and the third branch 3 includes a third resistor R3 and a third capacitor C3, and the third resistor R3 and the third capacitor C3 are connected in series.

[0019] The value of the first resistor R1 is 400 kΩ, the value of the second resistor R2 is 210 kΩ, and the value of the third resistor R3 is 42 kΩ; the value of the first capacitor C1 is 1.23×10-8 F, the value of the second capacitor C2 is 1.84×10-8 F, and the value of the third capacitor C3 is 9.42×10-8 F.

[0020] The tests in this embodiment were carried out at 50Hz / 60Hz / DC. When the specified leakage current was observed, it was considered that the breakdown voltage had been reached.

[0021] Wait about 5 minutes between each test condition to allow the sample to fully discharge and cool, and then increase the voltage according to the normal procedure of the test standard.

[0022] The first branch 1 is used to test the result of the first node A - common node D, the second branch 2 is used to test the result of the second node B - common node D, and the second branch 3 is used to test the result of the third node C - common node D.

[0023] The test conditions and test results are as follows:

[0024]

[0025] The statistical analysis of the verification samples was processed using robust statistical techniques. The value reported by the laboratory was used as the laboratory test result, the median value was used as the specified value, and the standardized interquartile range was used as the measure of variability (target standard deviation). The statistical evaluation was calculated for the Z value according to the following formula:

[0026] Z = (x - X) / σ

[0027] In the formula:

[0028] x - The test result of the participating laboratory;

[0029] X - The specified value;

[0030] σ - The measure of variability (target standard deviation);

[0031] When The result is satisfactory;

[0032] When The result is suspicious;

[0033] When The result is unsatisfactory.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A typical voltage withstand test capability verification sample, characterized in that: The invention comprises a first branch (1), a second branch (2) and a third branch (3), wherein one end of the first branch (1), the second branch (2) and the third branch (3) are respectively provided with a first node (A), a second node (B) and a third node (C), and the other ends of the first branch (1), the second branch (2) and the third branch (3) are connected in parallel to a common node (D), the first branch (1) comprises a first resistor (R1) and a first capacitor (C1), the first resistor (R1) and the first capacitor (C1) are connected in parallel, the second branch (2) comprises a second resistor (R2) and a second capacitor (C2), the second resistor (R2) and the second capacitor (C2) are connected in parallel, and the third branch (3) comprises a third resistor (R3) and a third capacitor (C3), the third resistor (R3) and the third capacitor (C3) are connected in series.

2. The typical withstand voltage test capability verification sample according to claim 1, characterized in that: The value of the first resistor (R1) is 400 kΩ, the value of the second resistor (R2) is 210 kΩ, and the value of the third resistor (R3) is 42 kΩ; The value of the first capacitor (C1) is 1.23×10 -8 F, the value of the second capacitor (C2) is 1.84×10 -8 F, the value of the third capacitor (C3) is 9.42×10 -8 F.

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