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Energy Efficient Motors

Crompton Greaves has now developed a complete family of high efficiency motors confirming to Eff level 1 standards of IEEMA : 19-2000 and other applicable standards in Europe and restofthe world .
These motors are available in TEFC construction for use in safe areas and also in flameproof enclosure for use in Hazardous areas .

 


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SPECIAL DESIGN FEATURES
Higher efficiencies are achieved by following features :
Low loss special grade of thinner laminations. This reduces the Iron loss even at partial loads.
Thicker conductors and more copper contents reduce copper loss due to lower resistance.
Longer core length, reduced and uniform air gap between stator and rotor to reduce stray losses.
Special design of fan and fan cover to reduce windage losses.
BENEFITS
Improved efficiency is available from 60% to 100% load.The eff curve is almost flat resulting in higher energy savings as in most of the cases the motor is not always fully loaded.

The special design features also result in lower operating temperatures which enhance the life of motor and reduce the maintainence costs.

These motors have inherently low noise and vibration and help in conservation of environment.

Crompton Greaves energy efficient motors offer an additional feature which no other manufacturer offers.

These motors are with highest power factor in the industry due to special exclusive designs available with Crompton Greaves.

The higher power factor reduces the currents in the cables supplying power to motor and this reduces cable loss,improving the system efficiency sometimes by even 2%.

Sometimes this allows even a lower cable size saving tremendously on capital costs.Saving is also made by reducing capacitors required to improve power factor.
MANUFACTURING RANGE :

Efficiency Level 1

  • 0.37 kw to 160 kw
  • Frame sizes: 71 to 315 for TEFC
  • 80 to 315 for Flame proof
  • The entire range is available in IEC frames sizes (metric range) and also in NEMA frames.
CONFORM TO FOLLOWING STANDARDS :
  • IEEMA : 19-2000
  • IS 12615
  • IS 325-1996 & IEC 60034
  • NEMA EPACT EFFICIENCY VALUES (for NEMA motors)
    IEEMA 19-2000 standard covers KW rating only up to 160 KW. However we are offering energy efficient motors up to 450 KW.
IMPORTANCE OF ENERGY EFFICIENCY :
Growing cost of energy calls for power saving at each possible step of manufacturing.Electric motor driven systems used in industrial processes consume more than 70% of electricity used in industry, hence best possible technology is being applied for achieveing highest possible efficiency values.
EFFICIENCY MEASUREMENT OF AN ELECTRIC MOTOR :
The efficiency of an electric motor is determined by the amount of useful power it produces compared to the amount of energy required to operate it.The figure below illustrates how a Crompton Greaves Energy efficient motor efficiently turns 1000 units of electrical power into mechanical power.
Since motor efficincy is commonly expressed as a percentage.Efficiency in this case would be 94%.
APPLICATIONS :
The benefits of using these motors are maximum in continuous duty applications likeBlowers, Compressers,Fans, Exhausters pumps etc.
BEST PERFORMANCE EVEN AT PARTIAL LOADS :
In many applications the load factor of the motor will range between 60% to 80% . The eficiency curve of standard motor is dropping in nature i.e there is a sharp fall in efficiency at partial loads.But the energy efficient motors have a flat curve and hence th fall in efficiency is marginal. Thus energy saving is significant even in part loads.
 

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