Lightning surge generator is mainly used to evaluate the impact and disturbance resistance test of railway signal equipment connected with power line. What is the impact of lightning surges on electronic device?
Lightning surges occur in a very short time, in the order of microseconds.Waves gush out of the current, the voltage current amplitude is more than twice the normal value. Since the input filter capacitor is charged quickly, the peak current is much larger than the steady-state input current. The power supply shall limit the surge level that AC switch, rectifier bridge, fuse and EMI filter components can withstand. The AC input voltage shall not damage the power supply or cause the fuse to blow out
1. Voltage fluctuation。Under normal working conditions, the machine will automatically stop or start.There are air-conditioning, compressor, elevator, pump or motor in the electrical equipment, computer control system often appears no reason to reset. The motor is often replaced or rewound.The service life of electrical equipment is shortened due to malfunction, reset or voltage problem.
2. Damage to equipment. Voltage breaks through semiconductor devices, damages metallized surfaces of components, damages printed circuit board printing lines or contact points, damages tri-terminal dual SCR elements/thyristors.
3. Cause interference to the equipment. Lock, thyristor or three-terminal two-way thyristor components out of control, data file part damage, data processing program error, error and failure of receiving and transmitting data, premature aging, premature aging parts, electrical life greatly shortened, output sound quality, picture quality.