... DC breaker and outputing contact signal in photovoltaic power system. And they all have interfaces with air velocity ... place without condensation, without corrosive gasaltitude≤4000minsulation resistance≥100MΩPower frequency withstand voltagePower supply, PV input, relay output, ... , temperature sensor, ectroirradiator;4. Output DC24V to power external sensors;5. Local LED displays the current ...