How come we must continue the Voltage Test?
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Written by: usergirl
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Date: Sun, 8 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 check and AC frequency voltage. The prosperities of insulating materials figure out different Breakdown Mechanism between AC and DC voltage. There're a series of different media in most insulating materials and methods. Once the gear is working below AC voltage, the voltage will allocate itself in proportion to dielectric continuous and dimension in the material. Whilst the DC just locate the voltage in proportion towards the material's resistance. If you need to do the electronic load check, the check voltage of DC requires a higher diploma than electrical safety tester.
Kind check and factory test
Type test is used to decide that the insulation construction design is ideal for application. Generally after finishing the temperature check, humidity check, strife test and also other tests, we ought to go on the test immediately. Usually we should switch on the voltage for one moment.
Factory check would be to detect the defects of the goods in the production procedure. It's not used to check the insulting construction design is advisable or not. Quite often we do the check for your completed goods before packing. The insulation goods more often than not possess the subsequent defects. The sharp components damage the wire insulation. The connecting ground cord or even the main and secondary digital components is damaged by short circuit. The welding joint is off or poor manipulated. Or even the creep length is shortening. Or the insulation inside the transformer is damaged.
Voltage test and breakdown test
After voltage check, it only exhibits that the insulation structure of goods can stand up to the test voltage, but electrical safety tester doesn't mean that the item can withstand how much voltage. If we go around the application study of insulation materials and also the design of electrical equipments, we have to check the dielectric strength, and we need to go around the breakdown test.
Breakdown test is to check the voltage when the dielectrics are broken down. When the electrical field power exceeds a certain limit, the current with the media and the voltage on the media won't fit to Ohm law, and they possess a unexpected improve. If the insulation breakdown for an electronic load item happens, it loses the operation function operation. The end result is entirely different in the voltage test. Voltage check would be to make certain that the products haven't any defects, and they can work securely and normally. Thus, the stand up to voltage in voltage test is confirmed to be safe, dependable, effective, so we should really be strictly adhere to it.
I studied power supply for many years, manufactured electrical safety tester. Now focused on ac electronic load research.
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