Planning with SIVACON 8 PS - Siemens

GlossaryRated ultimate short-circuit breaking capacity (I cu ) DIN EN 60947-2; 4.3.5.2.1The maximum short-circuit current that a circuit-breaker is capable of breaking (test O - CO,previously P - 1). After short-circuit breaking, the circuit-breaker is capable of tripping underan overload, with increased tolerances.Rated insulation voltage (U i ) DIN EN 60947-1; 4.3.1.2Voltage to which insulation tests and creepage paths apply. The highest rated operatingvoltage must never be higher than the rated insulation voltage.➜ Rated operating voltageRated short-circuit breaking capacity (I cn ) DIN EN 60947-1; 4.3.6.3The highest current that a switching device can break at rated operating voltage andfrequency without damage. It is specified as an rms value.➜ Rated operating voltageRated short-circuit making capacity (I cm ) DIN EN 60947-1; 4.3.6.2The highest current that a switching device can make at a specific rated operating voltageand frequency without damage. Contrary to the other characteristic data, it is specified as apeak value.➜ Rated operating voltageConditional short-circuit current, rated DIN EN 60947-1; 2.5.29➜ Rated conditional short-circuit current (Iq)Planning with SIVACON 8 PSPlanning Manual, 10/2007, A5E01541101-01 273