- SIRIUS 3RW30 soft starters reduce the motor voltage through variable phase angle control and increase it from a selectable starting voltage up to the mains voltage within the ramp time. They limit the starting current and torque, so that the shocks that occur during direct starts or wye-delta starting are avoided. Mechanical loads and mains voltage dips can be effectively prevented in this way.
- Soft starting reduces the stress on the connected equipment, resulting in lower wear and therefore longer periods of trouble-free production. The selectable starting voltage means the soft starters can be individually adjusted to the requirements of the application in question and – unlike wye-delta starters – are not restricted to two-stage starting with fixed voltage ratios.
- SIRIUS 3RW30 soft starters are characterized above all by their small space requirements. Integral bypass contacts mean that no power loss has to be taken into account at the power semiconductors (thyristors) after the motor has started up. This cuts down on heat losses, enabling a more compact design and making external bypass circuits superfluous.
- Thank to two-phase control (two antiparallel thyristors in two out of the three phases) enables the two-phase starting of motors up to 55 kW (at 400 V), can be supplied for standard applications in three-phase systems. Extremely small sizes, low power losses and simple startup are just three of the many advantages of this soft starter.
3RW30
The SIRIUS 3RW30 Basic Performance soft starters are suitable for soft starting and stopping of three-phase asynchronous motors.
2-phase control, up to 55 kW (at 400 V)
- Operational voltage: 200 ~ 480VAC
- Operational current at 40 °C: 3 ~ 106A
- Rated control supply voltage: 24VDC / 230VAC
- Operating power for three-phase motors at 400V, 40 °C
- Inline circuit: 1,5 ~ 55 kW
- Inside-delta circuit: 7,5 ~ 75 kW
- Minimum load (% of Ie): 9 ~ 10 %
- Starting voltage: 40 ~ 100%
- Ramp-up and ramp-down time: 0 ~ 20s
- Maximum starting time: 3s
- Maximum starting current (% of Ie): 300%
- Maximum number of starts per hour: 20/h
- Number of parameter sets: 1
- Number of controlled phases: 2
- Maximum conductor length between soft starter and motor: 100 ~ 300m
- Features:
- Soft starting/ramp-down
- Voltage ramp
- Integral bypass contact system