SIEMENS 3RW3028-1BB14 Soft Starter, Sirius, 3RW30 Series, Three Phase, 18.5kW, 38A, 200VAC to 480VAC
The is a Soft Starter reduces the motor voltage through variable phase control and increase it in ramp-like mode from a selectable starting voltage up to mains voltage. During starting, these devices limit the torque as well as the current and prevent the shocks which arise during direct starts or wye-delta starts. In this way, mechanical loads and mains voltage dips can be reliably reduced. Due to two-phase control, the current is kept at minimum values in all three phases throughout the entire starting time. Due to continuous voltage influencing, current and torque peaks, which are unavoidable in the case of wye-delta starters, for instance, do not occur.
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|---|---|---|
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