Planning with SIVACON 8 PS - Siemens

GlossaryRated control voltage (U c ) DIN EN 60947-1; 4.5.1This is the voltage that is applied to the normally-open actuation contact in a control circuit. Itmay deviate from the rated control supply voltage due to transformers or resistors in theswitching circuit.Rated conditional service short-circuit breaking capacity (I cs ) DIN EN 60947-2; 4.3.5.2.2The short-circuit current dependent on the rated operating voltage that a circuit-breaker iscapable of repeatedly breaking (test O - CO - CO, previously P - 2). After short-circuitbreaking, the circuit-breaker is able to continue carrying the rated current with increasedintrinsic heating and can trip under an overload.➜ Rated uninterrupted current; Rated operating voltageRated operating power DIN EN 60947-1; 4.3.2.3The power that a switching device can switch at the assigned rated operating voltage incompliance with the utilisation category, e.g. circuit-breaker utilisation category AC 3: 37 kWat 400 V.Rated operating voltage (U e ) DIN EN 60947-1; 4.3.1.1Voltage to which the characteristic values of a switching device apply. The highest ratedoperating voltage must never be higher than the rated insulation voltage.➜ Rated insulation voltageRated operating current (I e ) DIN EN 60947-1; 4.3.2.3The current that a switching device can carry, taking into account the rated operatingvoltage, the operating duration, the utilisation category and the ambient temperature.➜ Rated operating voltageRated uninterrupted current (I u ) DIN EN 60947-1; 4.3.2.4The current that a switching device can carry during continuous operation (for weeks,months or years).Rated making capacity DIN EN 60947-1; 4.3.5.2The current that a switching device can make in compliance with the utilisation category atthe respective rated operating voltage.➜ Rated operating voltageRated frequency DIN EN 60947-1; 4.3.3The frequency for which a switching device is designed and on which the other characteristicdata is based.➜ Rated operating voltage; Rated uninterrupted currentPlanning with SIVACON 8 PS272 Planning Manual, 10/2007, A5E01541101-01