The DigiTOP VP-16Af voltage relay is designed to protect electrical appliances and household appliances from excessive mains voltage. The relay operates in maximum voltage relay mode and protects electrical equipment from excessive mains voltage (it can be used to connect an additional load in a photovoltaic system). The device monitors the upper voltage limit. If this voltage limit is exceeded, the load is switched off (or an additional load can be connected to the power take-off). The load is automatically switched on (off) as soon as the voltage drops to the upper limit of the voltage minus the voltage drop (hysteresis) after the set response time. I.e., if the upper limit is set to 253 V and the hysteresis is 10 V, then when 253 V is exceeded, the load will be turned off, and if it drops to 243 V, then after the set response time (0 to 10 seconds), the load will be turned on. Voltage reduction in a photovoltaic installation is important for safety and efficiency reasons. Too high a voltage can cause overvoltages and damage to the installation and the devices connected to it. Overvoltages can occur when there is a sudden increase in power or a decrease in resistance in the circuit. Too high a voltage can also increase the risk of electric shock. It is important to adjust the voltage of the photovoltaic system to the requirements of the devices and networks to which it will be connected. Programmable Settings: - Upper limit of switch-off, step 1V - 230-270V - Voltage hysteresis (voltage drop from upper limit), step 1V - 1-10V - Turn-on response time, 1 sec step - 0-10 sec Single-phase Rated Load Current: 10A Maximum load current: 16A Operating Voltage: 50-400V AC Network Operating Frequency: 50Hz Switch-off time: 0.02 sec. Contact configuration: Changeover contact (NO+NC) Size: 2 modules on DIN rail