Globalisation has altered the equations for the Indian manufacturers.
Today, the need to be economically competitive is of utmost importance
and EnergyEfficient Motors offer the manufacturers just that.
All our
Energy  Efficient Motors are characterized
by low values of noload currents. These result in the superior
values of power factor, through out the operating load range. Overall
efficiencies at partial loads ( 50 %, 75 % ) are also better than
most other brands. Energy Efficient Motors are designed to minimize
losses both in the core and in the windings. Thus, there will be
lesser generation of heat. This leads to a higher inbuilt thermal
reserve.


Our following designs of eff2 and eff1 level motors
are operational in the field :
RPM 
POLE 
kW RATING 
3000 
2 
7.5, 3.7, 1.5, 0.75, 0.37 
1500 
4 
45, 22, 18.5, 15, 11, 9.3,
7.5, 5.5, 3.7, 2.2, 1.5, 1.1, 0.75, 0.37 
1000 
6 
18.5, 15, 2.2, 0.75 
750 
8 
1.5, 1.1, 0.75 
Efficiency levels of our following sizes are certified by ERDA
(BIS and NABL approved Lab.)
Efficiency Values of 3 – Ø Squirrel
Cage
Energy Efficient Induction Motor

Rating in kW 
0.75

1.1

3.7

7.5

11.0

22.0

45.0
* 
Syn. Speed 
1500 
1500 
1500 
1500 
1500 
1500 
1500 
Frame Size 
80 
90 S 
112 M 
132 M 
160 M 
180 L 
225 M 
Date of Testing 
29.12.95 
29.100.03 
31.01.02 
05.02.03 
29.10.03 
28.02.02 
05.02.03 
N.L. Current (A) 
1.13 
1.14 
2.89 
4.82 
6.77 
12.04 
23.36 
Eff. at 100 % Load 
75.63 
78.4 
85.2 
87.73 
89.99 
90.08 
 
Power Factor at 100
% Load 
0.803 
0.846 
0.874 
0.837 
0.844 
0.862 
 
Eff. at 75 % Load 
 
 
86.33 
88.16 
90.0 
90.14 
 
Eff. at 50 % Load 
 
 
 
 
 
88.40 
89.26 
Conforms to IEEMA19

Eff2 
Eff2 
Eff2 
Eff2 
Eff1 
Eff2 
Eff2 
* Due
to nonavailability of loading facilities, 45kW (at ERDA), motor
was tested at 50 % load i.e. 22 kW (partial loading). Efficiency
obtained was 89.26 % and powerfactor – 0.83. 
NOTE :
 Eff2 level of IEEMA19 surpases the efficiency values of IS
: 12615, in all cases.
 For most of the above sizes, further design improvements have
already been effected. Thus Eff1 level can be offered, with the
prior confirmation.
In the event of bulk supplies of any one size, type testing can
be arranged at ERDA, if intimated at the enquiry stage.
Copper Rotor EnergyEfficient Motors :
There are many international papers on Rotating Machines, advocating
the advantages of copper rotors over the mass produced aluminium
diecast rotors. The advantage of higher conductivity of copper
over aluminium is just one advantage. Secondly, the slip reduces,
thereby resulting in the further savings in the rotor losses. The
motor runs at higher speed.
We have supplied many designs with copper rotors. Such motors are
being supplied to OEMs, on the regular basis as well as end users
– infrequent buyers of different sizes. The following copper rotor
designs have been built. The motors are operational in the field.
RPM 
POLE 
kW RATING 
1500 
4 
45, 30,
18.5 3.7, 1.1 
1000 
6 
18.5, 15 
Special features are built into designs so that the required starting
torque is available for all the above motors. e.g. 45 kW, 1500 RPM,
copper rotor motor drives Centreless Grinding Machine, which has
a high inertia load.
PAY BACK PERIORDS :
In many cases the power consumption data is already generated at
motor users’ premises, using
A : Standard Motors
B : Changing over to our EnergyEfficient
Motors.
Payback periods, accepted by clients, have ranged from six months
to one – and – a half year.
Other Advantages of EneryEfficient Motors :
 EE motors can withstand wider voltage and frequency fluctuations
and higher
ambient temperatures, without breakdown.
 EE motors can take occasional as well as continuous overloads,
without damaging
winding.
 The life of insulation of EE motors is considerably higher
than that in standard
motors, even when the same grade of insulation materials are used.
 In the event of field repairs, the EE motors would retain its
rated capacity (kW ratings), even when repairs are carried out
by less skilled workers and in inexact conditions. [Stampings
subjected to higher temperatures while removing burnt winding,
incorrect coil sizes, errors in wire gauges etc.]
 When motors run at partial loads, the savings of EE motors are
even more pronounced as compared to the standard motors.
APPLICATIONS :
(A) 
Centreless Grinding Machine 
Case studyI ( 11 kW )
Case studyII ( 18.5 kW ) 
(B) 
Projects 
Case studyIII ( 18.5 kW ) 
(C) 
Circular Looms Motor 
Case studyIV ( Looms Motor ) 
(D) 

Case studyV ( 1.1 kW ) 

CASE
STUDY  I 

Running Costs of 11 kW – 1500 RPM Motors :
For Centreless Grinders, the duty is assumed as :
10 Seconds : cutting operation
6 Seconds : idle runnig of wheel.
Whenever the wheel runs idle, the energy is required (output from
motor) to maintain the speed of the wheel and other friction and
windage losses. These would be within 10 % of the rated capacity
of the motor. Thus, the is very near to noload running condition
of motor. When the wheel takes cut, the loading is assumed to be
5.5 kW, approx. (50 % of rated output of motor), as per the data
from Grinding Machine Mfgr.
Consideration : 8000 working hours of the machine
per year and electricity rate of Rs. 5.00 per unit.
COMPARISION CHART 
Sr.
No. 
Make 
Typical
Well Known Brand MNC Make 
Polyphase
Motors
E.E. Motor 
Remarks 
Claims from
Commercial Tech. Literature 
Test Results
at ERDA 
1. 
No
Load 
Current 
[A] 
10.4
(Measured Value)

6.77 
2. 
Power 
[W] 
754 
492 
3. 
Saving of Power 
[W] 
 
262 
4. 
Saving of Energy 
[KWH] 
 
786 
5. 
Saving 
[Rs.] 
 
3930/ 
6. 
ON
50 %
Load 
Current 
[A] 
13.3
(Back Calculation)

11.5 
7. 
Power 
[W] 
6379 
6193 
8. 
Saving of Power 
[W] 
 
186 
9. 
Saving of Energy 
[KWH] 
 
930 
10. 
Saving 
[Rs.] 
 
4650/ 
11. 
Total Savings (5 + 10) 
[Rs.] 
 
3930 + 4650 = 8580/ 

CASE
STUDY  II 

Running Costs of 18.5 kW – 1500 RPM Motors
For Centreless Grinders, the duty is assumed as :
10 Seconds : cutting operation
6 Seconds : idle runnig of wheel.
Consideration : 8000 working hours of the machine
and Electricity rate Rs. 5.00 per unit.
COMPARISION
CHART 
Sr.
No. 
Make 
Typical
Organised Make 
Polyphase
Motors
E.E. Motor 
Remarks 
Tech. Literature 
Test Results
at ERDA 
1. 
No
Load 
Current 
[A] 
20
(Measured Value)

11 
2. 
Saving of Power 
[W] 
 
407 
3. 
Saving of Energy 
[KWH] 
 
1221 
4. 
Saving 
[Rs.] 
 
6105/ 
5. 
ON
50 %
Load 
Current 
[A] 
26
(Back Calculation)

19 
6. 
Saving of Power 
[W] 
 
900 
7. 
Saving of Energy 
[KWH] 
 
4500 
8. 
Saving 
[Rs.] 
 
22500/ 
9. 
Total Savings (4 + 8) 
[Rs.] 
 
6105 + 22500 = 28605/ 
Payback period for premium on the price  40 days.

CASE
STUDY  III 

Rating : 18.5 kW / 1000 RPM
Make 
MNC make
India Energy Efficient

Polyphase Morors
E.E. Motor 
Remarks 
Actual Results on Load at
Customer’s end 
NoLoad A
Current 
@ 13.0 
9.6 
Load A
Current 
27.46 
21.07 

CASE
STUDY  IV 

POLYPHASE MOTORS CIRCULAR LOOM MOTORS
Make 
X

Y 
Polyphase Morors
(Special) 
Current Consumed in Amp

4.33 
5.6 
3.52 
Power Consumed in Watts

2179 
2818 
1941 
Average Running 
22 
22 
22 
Units Consumed per Day 
48 
62 
42.7 

Polyphase
v/s X

Polyphase
v/s Y 
Yearly Savings in Rs.

9520 
35080 
Pay Back Period in Months

11 
4 
Considering cost of “Polyphase” make motor = Rs. 8,500/
Cost of Unit = Rs. 5/

CASE
STUDY  V 

Sr.
No. 
Make 
Typical Organised
Make

Polyphase Morors
E.E. Motor 
Remarks 
Actual Results on Load at
Customer’s end 
1. 
NoLoad  Current
A 
1.83 
1.14 
2. 
Load  Current
A 
2.21 
1.53 
3. 
Power  W 
1239 
879 
4. 
Saving  W 
 
360 
5. 
Saving  Rs. 
 
14,400 
CONSIDERATION :
8000 working hours of the machine per year and electricity rate
of Rs. 5.00 per unit.
* The payback period is within six months.
