1, The front-end fuse provides protection against circuit overload, short circuits and MOV failure;
2, Two-stage 0°, 90°, 180°, 270° full-phase varistors are used between L-N differential mode. The varistor residual voltage change rate is very small after multiple tests, and the performance is stable, which can meet the needs of 40 surge tests;
3, The common mode L/N line respectively uses a varistor and then connected in series with a ceramic gas discharge tube to PE to provide a surge discharge path;
4, The power NTC connected in series on the N-line effectively suppresses inrush current during power-on;
5, To meet the insulation withstand voltage test of the input to the ground, need to adjust the voltage parameters of the GDT.
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