The new Siemens SIPROTEC 7VE63 paralleling device is a multifunction relay used for paralleling large generators or power systems, which require high reliability. Its unique 2-channel measurement method and hardware design guarantees secure paralleling. Two independent measurement methods, algorithms and trip circuits must all concur to allow secure operation. The unit has superior control and monitor functions, as do all the SIPROTEC 4 relay family. Voltage and frequency functions (V>, V<, f>, f<, df/dt) including voltage vector jump (V) are available for Generator protection or network decoupling applications.