Generators for rotating UPS systems: Even the slightest drop in power can cause a failure of servers or an entire DATA center. The increasingly networked world, especially through the monitor and remote functions of Industry 2.0 production systems, requires uninterrupted data transmission via the data centers of the network providers. In order to ensure that the computers will be permanently supplied with the power, rotating UPS systems are often used in addition to the battery UPS systems for large data centers. For this application, B.E.M has developed generators, which react extremely quickly to load shedding or load connection. The bearing cassettes specially developed by B.E.M enable them to rotate continuously for many years without changing bearings. The system structure with external electric motor-driven fans reduces the operating costs when idling and at the same time the maximum possible emergency power output.