S. M. Engineers
Chilla Sarda Bangar, New Delhi, Delhi
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AC Motor Soft Starter

We are a leading Manufacturer of ac motor soft starter from New Delhi, India.

AC Motor Soft Starter

AC Motor Soft Starter
  • AC Motor Soft Starter
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Approx. Price: Rs 42,000 / PieceGet Latest Price
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Product Details:

Model SeriesMSS - 035
Size385 x 200 x 240 mm
Incomer Supply415VAC/440VAC @ 50Hz. (690VAC optional)
Motor Ratings HP21 to 35 HP @ 440VAC
Motor Ratings KW6 to 26 KW @ 440VAC
Max Starting Current75A / 36A
Output0 to 415 /440V AC 3 phase vari able voltage to achieve full speed in max. 10 - 20 Sec
Supply Voltage230 VAC +/ - 10%, 50/60 Hz. Max - 10VA

A motor soft starteris a device used with AC electrical motors to temporarily reduce the load and torque in the power train and electric current surge of the motor during start-up. This reduces the mechanical stress on the motor and shaft, as well as the electrodynamic stresses on the attached power cables and electrical distribution network, extending the lifespan of the system

To gradually accelerate the speed of AC 3 phase  induction motor it  is required to feed  increasing voltage  to  the  motor  and  such  behavior  is  only  possible  by  connecting  SCRs  in  series  with  the motor.  The  SCRs  are  controlled  by  MSST15  firing  card  to  generate  the  firing  pulses  giving  the effect of soft start. Libratherm offers ready touse motor soft starter MSSXX for 3 phase induction motor.User  has  access  to  set  the  starting  voltage  to  create  the  torque  and  to  set  the  soft  start time. For over load trip, the feedback it taken from internalCT to monitor the load current and to generate  the  trip  contact  in  case  of  over  load  condition.  Once  the  motor  achieves  full  RPM,  it  is not  required  to  pass  the  current  through  the  SCRsand  hence  these  SCRs  can  be  bypassed  using external bypass contactor. The bypass command isavailable in the formof potential free contactonce the full speed is achieved as indicated by TOR LED.The START/STOP/RESET push buttons are accessible  from  front  and  parallel  remote  connections  are  availableonly  for  START/STOP to the user for external controls.

  • Suitable for 3 phase AC Induction motor up to 205KW (275HP)
  • Semikron make SCR modules (SKKT series)
  • Reduces starting current
  • Motor connection for both 3 wire close delta (In line) and 6 wire opendelta(in-side line)
  • User settable jump start and soft start / ramp time
  • Accepts start and stop command from external potential free contact
  • Over load trip facility and built in motor protection
  • Contactor bypass output and Fault output
  • Easy to install and maintain
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B. S. Sainger (Proprietor)
S. M. Engineers
KH No. - 154, HN No.-104 , Village - Chilla ( NEAR MCD PRIMARY SCHOOL ), Mayur Vihar Phase - 1.
Chilla Sarda Bangar, New Delhi - 110091, Delhi, India

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