Digital Motor Soft Starters

Digital Motor Soft Starters

  • Power range up to 710 kW at 400 V
  • Compact and Efficient Design and startup
  • Choice of startup functions: breakaway pulse, voltage ramp, voltage or current limiting
  • Adjustable Torque i.e. Pedestal voltage
  • Adjustable Ramp up start time.
  • System Run, fault, Power On, Start/Ramp Up, Bypass LED on front Panel.



Electrical Specification:

Supply Voltage Frequency Pedestal Voltage
240-460 V 47/63 Hz 20%, 30%, 50%, 70% of I/P Voltage

Environmental Specification:

Operating Temp. -10 oC to 40 o C
Storage Temp. -10 oC to 40 o C
Cooling Cooling with heatsink.
Relative humidity < 95 % no condensation allowed
Altitude Maximum 1000 m reduce kW Rating by 1 % per additional 100 M

Control Specification:

Ramp Up Time 0.5 Sec To 120 sec
Ramp Down Time 0.5 to Sec To 120 Sec
Starting Duty 2.5 X unit rating in amperes for 60 Sec
3 X unit rating in amperes for 30 Sec
4 X unit rating in amperes for 10 Sec
4.5 X unit rating in amperes for 5 Sec
Starts Per Hour 12 evenly spaced starts per hour at the Starting Duty
Starting Torque 9-49 % of the DOL starting torque
Current Limit 30 % DOL current for 60 Sec
40 % DOL current for 30 Sec
50 % DOL current for 10 Sec
70 % DOL current for 5 Sec
Semiconductor Fuses Standard on units > 132 amp
Fault Detection Shut down for loss of phase and short-circuit of Thyristors, indication on LED
Cooling Naturally cooled < 39 amps, force cooled > 53 amps
Relays Run, fault/top of ramp
Relay Contact Rating 1.2 KVA, 250 C AX Max
LED Indication 1System Run, fault, Power On, Start/Ramp Up, Bypass
Control Circuitry High frequency Microcontroller for controller