So why do we should instead persist the Voltage Test?
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Written by: usergirl
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Date: Mon, 9 Jan 2012 |
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The variations between DC voltage test and AC frequency voltage are as follows:
There're two types of voltage exams, i.e. DC voltage test and AC frequency voltage. The prosperities of insulating materials figure out different Breakdown Mechanism in between AC and DC voltage. There're a series of various media in most insulating supplies and methods. When the equipment is working below AC voltage, the voltage will allocate by itself in proportion to dielectric continuous and size of the materials. While the DC just locate the voltage in proportion to the material's resistance. If you just want to do the DC voltage check, the test voltage of DC demands a higher degree than electrical security tester.
Kind check and factory test
Type test is used to judge that the insulation construction design is suitable for application. More often than not after finishing the temperature check, humidity check, strife test and also of tests, we might go on the test instantly. Typically we should change on the voltage for one minute.
Factory test would be to detect the defects of the items within the manufacturing process. It's not accustomed to check the insulting structure design is justifiable or otherwise. Usually we do the check for the finished goods prior to packing. The insulation products generally possess the subsequent defects. The sharp components harm the wire insulation. The connecting ground cord or the main and secondary electronic load elements is damaged by brief circuit. The welding joint is off or poor manipulated. Or even the creep length is shortening. Or even the insulation within the transformer is damaged.
Voltage test and breakdown test
Following voltage test, it only exhibits the insulation construction of items can stand up to the test voltage, but it doesn't mean that the product can stand up to just how much voltage. If we go on the software study of insulation materials and also the design of electrical equipments, we have to test the dielectric power, and we have to go on the breakdown check.
Breakdown test is to check the voltage once the dielectrics are broken down. When the electrical safety tester strength exceeds a particular limit, the current through the media and the voltage around the media won't suit to Ohm legislation, and they possess a sudden improve. In the event the insulation breakdown for an digital load item happens, it loses the operation function operation. The results is fully different from the voltage check. Voltage test is to make sure the items have not any defects, and they can work safely and normally. Consequently, the withstand voltage in voltage check is proven to be secure, reliable, effective, so we should certainly be strictly follow it.
I studied power supply for many years, manufactured electrical safety tester. Now focused on ac electronic load research.
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