LPI Surge Filter boundaries the voltage differential on account of a lightning induced impulse involving phase and neutral and also from neutral to floor. Thus giving both frequent manner and differential (transverse) method security.Bảo vệ đa tầng: Bộ cắt lọc sét đầu nguồn 3 pha BSF200-three/320-63A-PN-VTD-S sử dụng công ng