Electrical device protection against voltage drop or power failure in the power distribution network

摘要

the installation (1) to protect an electrical device (electricity consumer) (10) from voltage failure or voltage drop in the power distribution network;switched between the power supply (3) and the power supply (13) to the electrical device (10),which as a unit includes a backup power source (2) equipped with an electrical circuit unit (8) with inverter (9),and with a thyristor switching unit (5) to switch the power supply of the electrical device (10) from the power distribution network to the unit of the backup power source (2) and vice versa,a measurement and evaluation unit (7) to measure the failure or decrease of the voltage /or current at the mains connection (3) and a control unit (4) therefor;that the unit of the backup power source (2) consists of a group of supercapacitors (12).