Safety requirement EN low level. Installation (overvoltage) category II refers to the local distribution level, which is suitable for equipment connected to the mains (AC power supply). Pollution Degree Pollution Degree 2 Pollution Degree Definition ⚫ Pollution Degree 1: No pollution or only dry, nonconductive pollution occurs. The pollution has no effect. For example, a clean room or air- conditioned office environment. ⚫ Pollution Degree 2: Normally only nonconductive pollution occurs. Temporary conductivity caused by condensation is to be expected. For example, indoor environment. ⚫ Pollution Degree 3:
Conductive pollution or dry nonconductive pollution that becomes conductive due to condensation occurs. To be found in industrial environment or construction sites (harsh environments). For example, sheltered outdoor environment. ⚫ Pollution Degree 4: The pollution generates persistent conductivity caused by conductive dust, rain, or snow. For example, outdoor areas. Security level Class 1 - Grounded products HBT3000 series user manual Copyright © Qingdao Hantek Electronic Co., LTD 6