Wednesday, September 5, 2012

Understand the requirements of electrical safety testing

In the amount of a large number of standard safety tests have been used in the world of manufacturing today's legal action, and many citizens are more preferred, test electrical safety is that your product meets distributed in the market place before the test requirements and on the essential structure of / s safety standards realism comes to become more important than ever to make sure to avoid the influence of obstacles these legal to.

Intended by the manufacturer (also known as production test routine) and the Test House (also known as type test) was performed at the end of each production line one, the test was carried out during the approval process : Yes electrical safety test is divided into two roles. Today, one of the test requirements of the production line which is generally known as insulation resistance test, we take a closer look.

The dielectric withstand test

Dielectric withstand test is performed to verify that electrical insulation and isolation requirements in the system components is maintained, production quality are reproduced. Product safety standards that are used in the product is used, to identify the length of the test voltage and time of the test.

Usage: As a basic insulation is required between the (neutral and ground line) metal parts dead and system main circuit High Voltage Testing Set potential such, is applied to both ends of insulation that has been tested. If there is sufficient insulation between the two during the test, there will be leakage current is very small amount. Although this small current is acceptable, there is no breakdown of solid insulation or insulation or air should not take place.

Breakdown can occur in any of the following reasons.

Weak insulating material
Pinhole of insulation
Improper spacing of the components
Insulation haggard

Current settings: Modern dielectric withstand testers can now set the maximum current limit value that the user is allowed. To test a representative sample of some of which are currently set tester dielectric maximum setting, the easiest way to determine the current limit setting your are found between each test It would be to establish an average value. You will be able to determine the leakage current value, set the trip you are a little higher level. H V Testing Set

Test voltage: the majority of safety standards, use of either AC or DC voltage of the dielectric can withstand the test of the production line. When using voltage AC test voltage when the peak of, i.e. positive or negative peak of the sine wave which is insulating material in question is strongest. DC test voltage is used, to be equal to the peak value of the DC voltage, AC voltage, you DC test voltage, it is necessary to ensure that the alternating test voltage is 1.414 times. Insulating Oil Testers

DC-to-AC:
Reviews leakage current, the manufacturer has insulation limit to detect insulation failure potential, and as a result, the advantage of using a DC voltage, it is possible to filter the product was applied voltage is gradually I fast is that it is possible to set to a value much lower than that of the AC test voltage. Capacitor DC voltage when using the safe discharge method and the possibility to become a highly charged so that should be established you need to be careful. The disadvantage of using a DC voltage is that it has been tested in only one polarity isolation.

Some of the advantages of using a test voltage AC is that it is possible to simulate stresses as seen in actual use the product more closely to check both the voltage polarity during testing it. Capacitive load, you will not be able to provide a charge can be applied as soon as the application of AC voltage and constant current real-time leak.

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