Siemens SIRIUS 3RF Series

SIRIUS 3RA21/22 load feeders
6.10 Technical data
SIRIUS Innovations
System Manual, 01/2011, A8E56203870002-03
617
Type 3RA2.1 3RA2.2
Size S00 S0
Number of poles 3 3
General data
Magnet coil power input for contactors
With cold coil and U
s’
50 Hz
3RT2015 ...
16
3RT2017 ...
18
3RT2024 3RT2026 ...
3RT2028
Switch-on power VA 27 / 24.3 37 / 33 65 77
cos φ 0.8 / 0.75 0.82
Holding power VA 4.2 / 3.3 5.7 / 4.4 8.5 9.8
 AC operation
cos φ 0.25 0.28 0.25 0.27
 DC operation
Switch-on power = holding
power
W 4 5.9
Dependent on the rated motor power P of the motor
Switch-on power VA 27 ---
cos φ 0.8 ---
Holding power VA 4.2 ---
 Up to 4 kW
cos φ 0.25 ---
Switch-on power VA 37 ---
cos φ 0.8 ---
Holding power VA 5.7 ---
 5.5 kW to 7.5 kW
cos φ 0.25 ---
Switch-on power VA --- 65
cos φ --- 0.82
Holding power VA --- 8.5
 Up to 5.5 kW
cos φ --- 0.25
Switch-on power VA --- 77
cos φ --- 0.82
Holding power VA --- 9.8
 7.5 kW to 15 kW
cos φ --- 0.25
Magnet coil operating range for contactors 0.8 to 1.1 x U
s
Lower limit at 55 °C 0.8 x U
s
---
At 60°C 0.85 x U
s
---
Motor starter protector durability
 Mechanical durability
Operating cycles 100000
 Electrical durability
Operating cycles 100000
 Maximum switching frequency per hour (motor starts)
1/h 15
Contactor durability
 Mechanical durability
Operating cycles 30 million 10 million
 Electrical durability
Operating cycles See the durability characteristic curves for the
contactors (technical data in chapter titled "Contactors
and contactor assemblies").