Soft Starter
medium
Reduced-voltage motor starter to limit inrush current on large motors.
15 yr
Typical Lifetime
Typical Manufacturers
ABB
Siemens
Schneider Electric
Known Models (3)
ABB PSE Marine Soft Starter
11-710 kW
· 710.0 kW
· Marine Equipment
· Thyristor Soft Starter
power_kw: 710
type: Thyristor Soft Starter
Common Failures:
- • Thyristor failure from overvoltage
- • Cooling fan blockage
- • Bypass contactor failure
- • CT input error
Service: Soft start for large pumps and fans. Check thyristor gate drives annually. Clean cooling fins. Bypass contactor for run mode.
Spares: Ersatzteile über ABB oder zugelassene Vertriebspartner. Lead time: 2-6 Wochen.
Schneider Electric Altistart 48 Marine
4-900 kW
· 900.0 kW
· Marine Equipment
· Thyristor Soft Starter
power_kw: 900
type: Thyristor Soft Starter
Common Failures:
- • SCR gate failure
- • Torque control instability
- • Communication module error
Service: Pump-stop function for water hammer prevention. Inside-delta for 3x smaller current rating. Marine coating available.
Spares: Ersatzteile über Schneider Electric oder zugelassene Vertriebspartner. Lead time: 2-6 Wochen.
Siemens SIRIUS 3RW55 Soft Starter
5.5-560 kW
· 560.0 kW
· Marine Equipment
· Thyristor Soft Starter
power_kw: 560
type: Thyristor Soft Starter
Common Failures:
- • Power semiconductor damage
- • Internal bypass relay failure
- • Overtemperature from poor ventilation
Service: Integrated bypass — compact design. Marine-coated version available. Annual thermal inspection.
Spares: Ersatzteile über Siemens oder zugelassene Vertriebspartner. Lead time: 2-6 Wochen.