PST.....300 and pstb370.......1050
Application and description

 

Application description

The PST range is a microprocessor based Softatarter designed with the latest technology for soft start and soft stop of motors. The PST Softstarter has several advanced motor protection features as standard. The four button keypad and the logic structure of the menu make the installation. commissioning and operation easy. it is possible to choose between 10 different languages.

The PST Softstarter can be used with or without a by-pass contactor except for the larger sizes PSTB370...PSTB1050 where the by-pass contactor is already built-in.
  • Wide main voltage range 208 - 609 V AC
  • Wide supply voltage range 100 - 250 V, 50/60 Hz
  • Current ratings 30 to 1050 A (in line) and 52 ...1810  A (inside delta)
  • Same unit can be used for both in line and inside delta connection
  • Premium adjustable Softstarter functions like start/stop ramp, kick start, jog, step down voltage and sequential starts.
  • Current limit adjustable between 2-5 x le
  • Thermistor (PTC) supervision of motor winding
  • Real time clock
  • Logging of last 20  events with time marking
  • Prepared for fieldbus communication
  • Motor overload protection with simulated motor temperature from measured current. Select between 10A, 10, 20 and 30
  • Locked rotor protection
  • Motor underload protection
  • Phase imbalance protection
  • Phase reversal protection
The PST Softatarter can be selected according to the rated motor power in normal duty applications like pumps, compressors, elevators, escalators, short conveyor belts and bow thrusters.
For heavy duty applications like centrifugal fans, crushers, mixers, mills, stirrers and long conveyor belts.

 

In-line and inside Delta connection of PST 30....1050

 

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