Siemens SIRIUS 3RT Manual page 109

Rated powers
A single size covers several versions with different rated operational currents I
performance range of the 3-pole 3RT26 capacitor contactors in size S00 reaches 12.5 kvar
at a voltage of 400 V. In size S0, the range extends to 33.3 kvar at a voltage of 400 V. In size
S2, the maximum power value is 75 kvar at 400 V. In size S3, the maximum power value is
100 kvar at 400 V.
The maximum rated operational voltage is 690 V. In devices with the size S3, the maximum
rated operational voltage is 1000 V. At higher operational voltages, the rated powers
increase as listed in the technical specifications.
All specified rated powers and rated currents refer to an ambient temperature of 60 °C. The
capacitor contactors are available with the performance levels 12.5 kvar (S00), 16.7 kvar
(S0), 20 kvar, 25 kvar (S0), 33 kvar (S0 with infeed terminal), 50 kvar (S2), 75 kvar (S2),
75 kvar (S3) and 100 kvar (S3) at 400 V.
Representation of the making operation
Single-phase representation of maximum capacitor inrush currents when energizing a 50
kvar capacitor at 400 V 50 Hz to an energized capacitor bank of 250 kvar without use of
reactors (inductors)
1. Energizing with contactor (without precharging)
Result: The maximum inrush current peak can reach values in excess of 10 kA.
SIRIUS - SIRIUS 3RT Contactors/Contactor assemblies
Manual, 09/2017, A5E03656507120A/RS-AE/006
Configuration
6.9 Switching of capacitive loads
. The
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