Siemens SIRIUS 3RT Series System Manual page 142

SIRIUS 3RT2 contactors/contactor assemblies
2.4 Configuration
Table 2- 16
U
S
R
SL
U
SL
S
ein
cos ϕ
Note
A maximum cable voltage drop of u
142
Calculation of the cable length
For AC voltage
Rated control voltage in V
Ohmic resistance per conductor and km of the control cable in Ω/km
Voltage drop on the control cable in %
, P Switch-on power of the contactor in VA/W
ein
Power factor of the contactor coil on switch-on
ein
For DC voltage
= 5% is permitted for SIRIUS contactors.
SL
System Manual, 01/2011, A8E56203870002-03
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