Glossary
SIVACON 8PS - Configuring with LX system
202
Configuration Manual, 10/2011, A5E02194899-02
Rated control voltage (U
c
) DIN EN 60947-1; 4.5.1
This is the voltage that is applied to the normally-open actuation contact in a control circuit. It
may deviate from the rated control supply voltage due to transformers or resistors in the
switching circuit.
Rated conditional service short-circuit breaking capacity (I
cs
) DIN EN 60947-2; 4.3.5.2.2
The short-circuit current dependent on the rated operating voltage that a circuit-breaker is
capable of repeatedly breaking (test O - CO - CO, previously P - 2). After short-circuit
breaking, the circuit-breaker is able to continue carrying the rated current with increased
intrinsic heating and can trip under an overload.
➜ Rated uninterrupted current; Rated operating voltage
Rated operating power DIN EN 60947-1; 4.3.2.3
The power that a switching device can switch at the assigned rated operating voltage in
compliance with the utilisation category, e.g. circuit-breaker utilisation category AC 3: 37 kW
at 400 V.
Rated operating voltage (U
e
) DIN EN 60947-1; 4.3.1.1
Voltage to which the characteristic values of a switching device apply. The highest rated
operating voltage must never be higher than the rated insulation voltage.
➜ Rated insulation voltage
Rated operating current (I
e
) DIN EN 60947-1; 4.3.2.3
The current that a switching device can carry, taking into account the rated operating
voltage, the operating duration, the utilisation category and the ambient temperature.
➜ Rated operating voltage
Rated uninterrupted current (I
u
) DIN EN 60947-1; 4.3.2.4
The current that a switching device can carry during continuous operation (for weeks,
months or years).
