Patent ID: 9472981
Filing Date: 2016-10-18
CPC Classification: H02J

Claim Text:
1. A device for an uninterruptible power supply to electric consumers, whereby at least two electrical distributed power generation units, independent from one another, are connected electrically in parallel, whereby each distributed power generation unit is coupled to at least one electric consumer bus, the device comprising: at least one electric consumer connection; and at least two electrical protection zones for isolating electrical faults and a plurality of protection zones with substantially instantaneous tripping for the electrical parallel connection of consumer networks, the protection zones each comprising at least one consumer bus and are provided in a mutual electrical ring connection, wherein the protection zones with instantaneous tripping each include at least one consumer bus and an associated bridging branch for the electrical coupling of the consumer bus to the ring connection and a coil branch for coupling an adjacent consumer bus in a second ring direction, to the ring connection, and wherein, in the ring connection, in each case a first switching element with a switching time of less than 10 ms for the electrical decoupling of the consumer buses from one another starting at a predetermined voltage drop that is established according to load requirements, but not higher than 30% in the consumer buses or a total fault current starting at about 600% in the ring connection, based on a nominal current, is arranged between each protection zone with a substantially instantaneous tripping and a protection zone, adjacent in a first ring direction, with a substantially instantaneous tripping and a protection zone, adjacent in the second ring direction, with a substantially instantaneous tripping.