Functions - ABB PST30 Installation And Commissioning Manual

Chapter 3
Description
22
3:2

Functions

The PST softstarter has several integrated protection and
warning functions. Almost any type of fault can also be
detected and displayed.
All available protections, warnings, and fault indications are
listed below.
Start/Stop functions
• Start ramp
• Stop ramp (soft stop)
• Initial voltage
• End voltage
• Step down voltage
• Current limit
• Kick Start
• Extended start range
• Extended stop range
• Sequence start
• Torque control
Protection functions
• Motor overload protection
• Locked rotor protection
• Motor underload protection
• High current protection
• Phase imbalance protection
• Phase reversal protection
• Thyristor overload protection
• PTC input for motor protection
Warning functions
• High current warning
• Low current warning
• Motor overload warning
• Thyristor overload warning
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