Using the latest Advanced Microcontroller based Technology, inherently more reliable and accurate

 Programmable C.T range of 30A - 100A/ 20mA

 Smooth and reliable change over to Delta, when load goes above set current in Star - with settable time (1 to 999 sec.)

 “ADD-ON” unit between existing Star Delta Starter and motor

 No need for Timers for Start delay and Star to Delta

 Built-in watch – dog circuit for Fail safe operation

 Using latest semiconductors with tested for 4KA surge voltage

 Constructed with double side Machinery soldering (SMD Board) to avoid manual error

 Direct digital display of current drawn by load in phase wise

 Protected by PASSWARD to enter to setting parameters

 Program setting by three soft membrane keys on the front panel

 Star / Delta running cumulative hours counted separately, to identify Power saving hours

 Individual setting for Star and Delta current (0.1 to 99.9A)

 Built-in Overload relay with Overload tripping time after start up

 Starting with time based and running with current based technology

 Starting with Star / Delta - with settable time (0-999 sec.) for Trumac / LMW carding

 Current setting for Star / Delta / Overload in decimal amps (0.1 to 99.99)

 Our product working range from 190V to 260V AC

 Product covered by Unbreakable Ventilated ABS material, to working upto 105 Deg C

 Detachable terminal connecters with different sizes, to avoid wrong connections

 Easily mountable size of CT’s (ID – 12mm for 30A and 24mm for 100A)

 Milli amps output CT’s for better accuracy

 Easily mountable, no need for panel cut-out

 Single model for two CT ratings (30A & 100A) with selectable CT ratio

 We can select by setting for Single CT and Three CT sensing


In any industry, the electrical motor accounts for 55% to 60% of the electrical energy consumption Induction motors operate efficiently as long as they are loaded up from 60% to 85% loading. When these motors are operated below 50% loading, the Efficiency and Power Factor is very low. During lightly loaded condition (less than 50% loading), it is preferable to run motors in Star mode instead of Delta mode, and this reduces your Electrical Bill.


 Voltage across winding reduces to 58% of rated voltage and line current reduces to 1/3 rd . Thus reduction in iron and copper losses, hence Less Power Consumption, Reduced Power Bills.

 Improvement in Power Factor and Efficiency

 Energy saving from 5% to 35% possible depending on percentage of loading of motor (No Load to 50% loading. At 50% load minimum saving and at no load maximum saving).

 Decrease in line current which gives additional savings in cable losses and losses in switch gears.

 No need of changing motor to lower KW rating.


 Under loaded equipment like pumps, blowers, agitators, ball and roll mills etc., or In process where load varies at different stages (3 phase machine s only).in all the Industries.

 Particularly in Textile spinning machines – Blow room Beaters, Carding cylinder motors (all type), Ring frame main motor (LG 5/1), and Humidification plant motors (Exhaust and Supply Air Fans).

 Machine shop industries: Like Lathe machine, Power Press, Drill M/C, Boring M/C. etc., (3 phase machines only).

 Decrease in line current which gives additional savings in cable losses and losses in switch gears.

 I/D Fans, F/D Fans.

BEE Guidelines on ENERGY SAVING in Under-Loaded Star-Delta Connected Motors.
Fig. shows the Efficiency, Power Factor, Speed and Current vs. Motor Shaft Load characteristics in both Delta and Star connections of the Motor.

 'In Delta-Connection', the line voltage is impressed on each motor phase winding. Whereas in ‘star connection', line voltage divided by _/ 3 is impressed on each phase winding.

 The vertical dark band (40 to 50% loads) is the ‘Changeover' region, which differentiates possible Delta operating zone (right hand side) and Star operating zone (left hand side).

 Observing the efficiency curves, it is clear that at light loads (30% or less); operation of motor in Star connection can save energy, as motor efficiency is significantly better.