High-frequency transformer arcing means that the voltage exceeds the tolerance of the air to make the ionization of the air into a conductor,that is,the arcing of the arc usually bypasses the insulator and is generated along the surface of the insulator,thus causing damage to the insulator.The high temperature of the arc melts the insulator.Or broken.The switch indicates that the rated short-circuit breaking current is 20KA,which means that the short-circuit tripping contact in the 20KA is effective,and the arc-extinguishing element is more than guaranteed.
Generally,high-frequency transformers are fired and arced,but they can work normally.It is necessary to test ARCING.But if it does not work properly,then it is necessary to measure HI-POT(may be a coil to coil short circuit,or a coil to core)Short-circuit with fire.)Under normal circumstances,HI-POT and ARCING must be tested during the production of high-frequency transformers.
The HI-POT test is mainly to test whether the transformer is damaged and whether the transformer can meet the rated withstand voltage requirement.The ARCING test is specifically for the arc discharge test,in order to detect the arcing phenomenon anywhere in the transformer.Avoid the arc discharge The life of the transformer is shortened.The rating of the general high-frequency transformer ARCING test is set to 6,which is 5.5mA.
WeChat