Lightning surge test is a test item of EMS, which mainly tests the immunity of equipment under test (EUT) subjected to induced voltage transient generated by lightning. When a lightning strike occurs during the use of EUT, an induced peak voltage may be generated on the power line and signal line ports. This voltage may degree or even damage the EUT performance. The lightning surge test is to simulate a spike voltage generated by a lightning surge generator and coupled to the power line and signal line to observe whether the EUT can work normally under such a large inductive surge. Test purpose is to examine the damage of the tested interface and the degradation of the device performance after the user line interface is impacted by the surge voltage during actual use of the device. Here are notes for lightning surge generator experiment.
1 when using a lightning surge generator, it is better to add an isolation transformer to block all external spikes as well as supply to the equipment.
2. Ensure that the lightning surge generator is grounded reliably.
3. It is better to use isolation transformer for EUT power supply, or use air switch with large leakage protection.
4. The safety of laboratory operation is the most important. Lightning surge generator will generate high voltage and high current, which is dangerous to a certain extent. Try not to touch the wiring position during test. When the lightning surge generator triggers discharge, please do not touch any connecting line. In case of emergency, press the emergency stop button directly, and the instrument will automatically eliminate the high voltage.
