Functioning
If the mains voltage is within the specified range, the contact between terminals 2-7 is closed and the mains power is transferred to the receiving line. If the permissible voltage
parameters are exceeded, the contact 2-7 is opened and the supply line is disconnected from reception. When the main line is disconnected, the generator starts up and then, by closing the 3-9 contact, the power supply from the generator is transferred to the receiving line.If the power supply on the main line is restored and is within the specified range for 10 seconds, the contact 3-9 will be opened and the generator will be disconnected.