Power frequency withstand voltage of 11kV vacuum circuit breaker is a basic test in electrical safety testing. Its purpose is to verify whether the electrical equipment and one of its components can withstand a certain limit of AC voltage at the rated voltage to ensure that no electric shock will occur during use, fire and other accidents.
1.What does power frequency withstand voltage mean?
Power frequency withstand voltage refers to the ability of the equipment to be placed in a sinusoidal AC electric field environment for a certain period of time under the rated (or specified) voltage, and its insulation capacity will not cause faults such as hardness short circuit. In layman's terms, it means using high voltage to "force" whether the equipment is safe and reliable enough to ensure that the product meets national and industry standards.
2.Parameters of power frequency withstand voltage
The main parameters tested for power frequency withstand voltage include: rated voltage, test time, test current and leakage current, etc. Among them, the rated voltage is generally the rated voltage value of the equipment plus some margin. The test time varies according to different standards, but it is generally not less than 1 minute; the test current is mostly 1mA, and the leakage current refers to the combination of Leakage current of the operating device and the device under test.
3.Characteristics of power frequency withstand voltage
Power frequency withstand voltage test has the following characteristics:
·Power frequency withstand voltage is a very basic electrical safety test, which can effectively reduce the probability of accidents in the use of electrical products;
·Power frequency withstand voltage has higher requirements on insulation materials, structure and technology, which increases product manufacturing costs, but ensures product quality;
·The power frequency withstand voltage test can not only test the reliability of insulating materials and structures, but also check whether the circuit design is reasonable.
Although the power frequency withstand voltage is a routine test, conducting the power frequency withstand voltage too frequently will lead to problems such as device aging and damage, and the test frequency needs to be reasonably controlled.
