PID controller

PID occurs mostly at negative volt- age with respect to the ground potential and is accelerated by high system voltages, high temperatures, and high humidity. In most un- grounded PV systems, the PV modules with a positive or negative voltage to the ground might have the risk of voltage induced attenuation. Apply for - Testing standard : IEC 62804 (-85 oC, 85%RH, -1000V, 96 hrs duration) - Operating standard : ASTM B 117 - Testing process standard : ISO 60068-2-52