Although it is now a trustworthy withstand voltage tester, in the process of operation, it may cause certain risks to operators due to some problems such as the influence of operators themselves or the outside world. Therefore, both the enterprises specializing in producing withstand voltage testers and the relevant enterprises using withstand voltage testers should try their best to prevent the occurrence of such risks, So how to reduce this kind of potential danger?
Generally speaking, many high-end withstand voltage testers are designed with embedded intelligent anti high-voltage electric shock system. This system is also called smart GFI for short. It can detect according to the use of current models. If the problem of electric shock and leakage occurs, the qualified withstand voltage tester will automatically cut off the high-voltage output in one millisecond, To ensure the safety of operators. Therefore, under the same operation conditions, a qualified withstand voltage tester, as long as the operator does not make too much mistakes, will rarely attack the operator electric shock and other dangers.
In order to protect consumers and operators, the manufacturers of pressure tester need to complete several types of safety tests when they finish the production of the equipment, so as to ensure that the products comply with the industrial specifications of product structure, function and process specifications. It includes voltage withstand test, insulation test, etc. the insulation test should be carried out before the parts are installed by the manufacturer, mainly to prevent the unqualified components from being installed into the product and causing potential hazards. For now, a qualified manufacturer, its production, testing and other processes must be carried out in strict accordance with the ISO world standards, and the final products must also reach the ISO world certification standards, that is to say, from parts to finished products must reach the ISO world certification quality standards, only in this way can we better root out the potential dangers. Of course, the use of related equipment enterprises, but also regularly arrange the operation of staff training, new must be under the supervision of experienced old staff to operate, so as to completely prevent the risk caused by operational errors.
1. What are the advantages of AC withstand voltage test
Generally, AC withstand voltage tester is easier to obtain the support of safety organization than DC withstand voltage tester. The main reason is that most of the tested objects will work under AC voltage, and AC withstand voltage test provides the advantage of alternating two polarities to apply pressure to the insulation, which is closer to the pressure that products will encounter in actual use. Because the AC test will not charge the capacitive load, the current reading is consistent from the beginning of voltage application to the end of the test. Therefore, since there is no stabilization problem required to monitor the current reading, there is no need to increase the voltage step by step. This means that unless the product under test senses the suddenly applied voltage, the operator can immediately apply the full voltage and read the current without waiting. Because the AC voltage will not charge the load, there is no need to discharge the tested equipment after the test.
2. What are the defects of AC voltage tester?
When capacitive load is tested, the total current consists of reactance current and leakage current. When the resistance current is much larger than the leakage current, it may be difficult to detect the products with excessive leakage current. When testing large capacitive load, the total current required is much larger than the leakage current itself. Because the operator is faced with more current, this may be a greater danger.
3. What are the advantages of DC withstand voltage test?
When the DUT is fully charged, only the real leakage current flows. This enables the DC withstand voltage test instrument to clearly display the real leakage current of the product under test. Because the charging current is short, the power requirement of DC withstand voltage tester is usually much smaller than that of AC withstand voltage tester used to test the same product.
4. What are the defects of DC withstand voltage tester?
Because DC voltage withstand test does charge the object under test (DLT), in order to eliminate the risk of electric shock of the operator handling the object under test (DLT) after the voltage withstand test, the object under test (DLT) must be discharged after the test. The DC test will charge the capacitor. If the DUT actually uses AC power, the DC method does not simulate the actual situation.
Post time: Jun-24-2021
