Delta to Star Converter

INTRODUCTION – Delta to Star Converter

CYCLIC LOAD ENERGY SAVER is an equipment developed to save power on variable load machines like press Machines, Injection Moulding Machines,Agitators,Conveyors and Textile Mills etc. This unit save power during the noload or partial load periods using delta to start change over and the power saving can be up to 30 To 40% of the noload power. The amount invested can be realised in few months.


During partial load or no-load period motor is supplied with 400/440v as that much power can be saved. Normally motors run in delta mode. l .e. full voltage is applied to the motor. So by making the motor to run in start mode during these no-load only 1/v3 times the line voltage is applied to the each phase winding of the motor which reduces the power input to the motor

  • Digital ammeter with auto scanner for three phase currents
  • Motor protection: over load, single phasing un balanced etc
  • Individual fault annunciation: ol-over load, spp-single phasing, ub-unbalance
  • Optional features like star-delta timer
  • Available in wide range up to 500 A
  • Man-machine interface through keypad & display
  • Less heating of motor assuring increase in life
  • In start mode save energy and obtain higher power factor & lower max. demand
  • Possible to save between 10 to 20 units per day
  • The saving in terms of rupees will work out to between Rs.20,000/- to 50,000/-
  • Low cost & best payback period as low as 6 months
  • Advantage of 100% depreciation provision in cash flow situation
  • Provides different curves as 2.5C, 5C 10C for accurate overload tripping on the basis of starting time current of the motor
1 TO 15 HP 16 TO 40 HP 41 TO 150 HP
NO LOAD 76% 60% 45%
10% 40% 30% 22%
20% 26% 22% 20%
30% 15% 13% 12%
40% 09% 08% 07%
50% 06% 05% 04%

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Compressors Crushers Ring Frames
Centrifuges Agitators & Conveyors Presses
Injections Moulding Machines Cooling Towers M.G. Welding Sets etc.
Shearing Machines Agitators & Conveyors Pug Mills
Cutting Machines Cooling Towers Reactors
Simplex Machines Blowers & Water Pumps Extractor

Supply Voltage Operation 230V ± 10%, 50HZ.
Load Sense Through Current Transformer
Protection Over Load, Single Phasing, Unbalance
LED Annunciation R, Y, B Phase Current Indication & Delta And Star Mode Indication
Delta to Star Changeover Time I-60 Sec. Settable
Start to Delta Change over Time Instantaneous
Bypass Automatic Delta to Start Conversion Bypass Through Toggle Switch(EXCEPT PROTECTION)