1 Amendment  to Requirements on Energy Efficiency Standard , 
Efficiency Labeling, and Inspection for Low-Voltage Three -Phase 
Squirrel -Cage Induction Motor s (including those installed in one  
part of specific equipment) (Draft)  
Subject: Amendment to Requirements on Energy Efficiency Standard, 
Efficiency Labeling, and Inspection for Low -Voltage Three -Phase 
Squirrel -Cage Induction Electric Motors (including those installed in 
one part of specific equipment)  
Basis: Paragraph 4, Article 14 of the Energy Management Act  
Announcement :  
1. Scope of Application   
(1). This announcement applies to low -voltage three -phase squirrel -cage induction 
motors (hereinafter referred to as “electric motors”) that m eet the requirements 
of the National Standard of the Republic of China (hereinafter referred to as 
CNS) 14400 and have a rated output of 0.75  kW/1  HP to 200  kW/270  HP or 
have been identified  by the competent central authority.  
(2). The term "specific equipment"  as declared in this announcement refers to 
pumps, air compressors, or fans manufactured or imported.  
2.Test Method  
Energy efficiency of the electric motor shall be tested in accordance with CNS 
14400 Loss Separation Method, IEC 60034 -2-1 Method 2 -1-1, or IEEE 112 
Method B.  
3. The energy efficiency requirements for the motors  
For electric motor s with rated power under 75  kW, the measured energy 
efficiency value shall not be less than the IE3 energy efficiency standard 
(Appendix 1), and for electric moto rs with rated power is 75 kW and above, 
the measured energy efficiency value shall not be less than the IE4 energy 
efficiency standard (Appendix 2). T he loss of measured energy efficiency shall 
not exceed 107% of the loss of the  labeled efficiency . 
4.Energy efficiency registration  
(1). While manufacturing or importing the electric motors for domestic use, the 
product manufacturer or importer (hereafter referred to as “Dealer”) shall 
submit relevant certification documents to register the Dealer's name, energy 
efficiency, and other information of the electric motors  2 (2). The Central Competent Authority shall, based on the aforesaid energy 
efficiency test report and labeled energy efficiency value at rated output  
registered by the Dealers, determine the efficiency gra de according to the 
energy efficiency standards table (see Appendix 1 and Appendix 2)  and assign 
the registration number . The Central Competent Authority may conduct 
sampling teat to a n applied electric motor  random ly before approving, and the 
Dealer shall  bear the related costs.  
5.Energy efficiency label  
(1). Posting  and the content s of label  for electric motors  in specific equipment  
While manufacturing or importing the products, the Dealers shall post the 
following items on strong nameplates on a prominent area of the products. 
These items shall be labeled in Traditional Chinese, unless the unit symbols, 
special characters, trademark and symbol cannot be indicated in Traditional 
Chinese. The Dealers shall not conceal, destroy or in any other way make the 
following information unrecognizable:  
a. Name of the product ; 
Three-Phase Squirrel -Cage High-Efficiency  Induction Motor; 
b. Number of poles;  
c. Rated output power (kW or HP); 
d. Rated voltage (V); 
e. Rated frequency (Hz); 
f. Symbol for the degree of protection by enclosure  (IP code ); 
g. Symbol of motor type ; 
h. Serial number and year of manufacture ; 
i. Rated efficiency(%)  : efficiency at rated output( full load ), 75% rated load, 
and 50% rated load.  
j. Efficiency grade:  (IE3 or IE4) 
k. Product ’s registration number;  
l. Name of the manufacturer or OEM consigner: for imported products, the 
name of the manufacturer or OEM consigner, agent, or distributor shall be 
labeled.  
Electric motors shall be labeled in conformity with the requirements as set 
forth in the preceding paragraph while being exhibited or sold for domestic 
use. 
 
(2). Posting and the contents of label for electric motors  
For specific equipment, the rated output power, poles or speed, rated voltage, 
rated frequency, protection method, and full load efficiency of the motor and 3 other performance parameters related to energy efficiency shall be disclosed in 
the embedded electric motors or in a noticeable place on the equipment.  
(3). Post-market  surveillance actions  
The Central Competent Authority may designate the model and volume of 
electric motors for  energy efficiency inspection each year. The Dealer shall 
send such electric motors to the designated testing laboratory for testing within 
the period informed by the Central Competent Authority, the Central 
Competent Authority may designate personnel or c ommissioned professional 
institutions to witness the testing procedures and methods.  
The volume of the first sampling and testing products  shall be determined 
based on the total amounts of the products sold by each Dealer in the 
preceding year . One sample  shall be tested out of 5 ,000 units, while there are 
less than 5 ,000 units sold, one sample shall still be tested. The maximum 
number of units inspected per Dealer is 10 units for each inspection.  The 
Central Competent Authority may adjust the sampling vol ume based on actual 
needs.   4 Appendix  1[FT1] 
IE3 energy efficiency standard for Low -voltage three -phase squirrel cage induction 
motor   
Rated output  2-Pole 4-Pole 6-Pole 
Synchronous 
speed (rpm)  Rated full - load 
efficiency  
η (%) Synchronous 
speed (rpm)  Rated full - load 
efficiency  
η (%) Synchronous 
speed (rpm)  Rated full - load 
efficiency  
η (%) 
kW HP 
(reference)  60Hz  Totally 
enclosed
(TE)   
type Drip 
proof 
type 60Hz  Totally 
enclosed
(TE)  
type Drip 
proof 
type 60Hz  Totally 
enclosed
(TE)  
type Drip 
proof 
type 
0.75  1 
3600  77.0  77.0  
1800  85.5  85.5  
1200  82.5  82.5  
1.1 1.5 84.0  84.0  86.5  86.5  87.5  86.5  
1.5 2 85.5  85.5  86.5  86.5  88.5  87.5  
2.2 3 86.5  85.5  89.5  89.5  89.5  88.5  
3.7 5 88.5  86.5  89.5  89.5  89.5  89.5  
5.5 7.5 89.5  88.5  91.7  91.0  91.0  90.2  
7.5 10 90.2  89.5  91.7  91.7  91.0  91.7  
11 15 91.0  90.2  92.4  93.0  91.7  91.7  
15 20 91.0  91.0  93.0  93.0  91.7  92.4  
18.5  25 91.7  91.7  93.6  93.6  93.0  93.0  
22 30 91.7  91.7  93.6  94.1  93.0  93.6  
30 40 92.4  92.4  94.1  94.1  94.1  94.1  
37 50 93.0  93.0  94.5  94.5  94.1 94.1 
45 60 93.6  93.6  95.0  95.0  94.5  94.5  
55 75 93.6  93.6  95.4  95.0  94.5  94.5  
75 100 94.1  93.6  95.4  95.4  95.0  95.0  
Note:  
1. η is the r ated full -load efficiency. Full-load efficiency is measured according to the 
method of residual loss on CNS 14400,  IEC 60034 -2-1 method 2 -1-1B or IEEE method B . 
2. For electric motor with rated power under 75 kW, both measured the labeled efficiency  
value  at rated output ( full load) shall not be less than the IE3 energy efficiency standard . 
3. The measured  full-load efficiency value  is rounded off to the first decimal place, with the 
second decimal place rounded off.  
4. If a rated output value not defined in the tables is at or above the midpoint between two 
consecutive power ratings, the efficiency standard shall be the higher of the two 
efficiencies.  
5. If a rated outpu t value not defined in the tables is below the midpoi nt between two 
consecutive power ratings, the efficiency standard shall be the lower of the two 
efficiencies.  
  5 Appendix  2 
IE4 energy efficiency standard for Low -voltage three -phase squirrel cage induction 
motor   
Rated output power  2-Pole 4-Pole 6-Pole 
Synchronous 
speed (rpm)  Rated full - load 
efficiency  
η (%) Synchronous 
speed (rpm)  Rated full - load 
efficiency  
η(%) Synchronous 
speed (rpm)  Rated full - load 
efficiency  
η(%) 
kW HP 
(reference)  60Hz Totally 
enclosed
(TE)   
type Drip 
proof 
type 60Hz Totally 
enclosed
(TE)  
type Drip 
proof 
type 60Hz Totally 
enclosed
(TE)  
type Drip 
proof 
type 
0.75  1 
3600  82.5  
1800  85.5  
1200  84.0  
1.1 1.5 85.5  87.5  88.5  
1.5 2 86.5  88.5  89.5  
2.2 3 88.5  91.0  90.2  
3.7 5 89.5  91.0  90.2  
5.5 7.5 90.2  92.4  91.7  
7.5 10 91.7  92.4  92.4  
11 15 92.4  93.6  93.0  
15 20 92.4  94.1  93.0  
18.5  25 93.0  94.5  94.1  
22 30 93.0  94.5  94.1  
30 40 93.6  95.0  95.0  
37 50 94.1  95.4  95.0  
45 60 94.5  95.4  95.4  
55 75 94.5  95.8  95.4  
75 100 95.0  94.5  96.2  96.2  95.8  95.8  
90 125 95.4  94.5   96.2  96.2  95.8  95.8  
110 150 95.4  94.5   96.2  96.2  96.2  95.8  
150 200 95.8  95.4  96.5  96.2  96.2  95.8  
185~200  250~270  96.2  95.4  96.5  96.2  96.2  96.2 
Note:  
1. η is the r ated full -load efficiency. Full -load efficiency is measured according to the 
method of residual loss on CNS14400, IEC 60034 -2-1 method 2 -1-1B or IEEE method B.  
2. For electric motor with rated power is 75 kW and above, both measured the labeled 
efficiency value at rated output (full load) shall not be less than the IE4 energy efficiency 
standard.  
3. The measured full -load efficiency value is rounded off to the first decimal place, with the 
second decimal place rounded off.  
4. If a rated out put value not defined in the tables is at or above the midpoint between two 
consecutive power ratings, the efficiency standard shall be the higher of the two 
efficiencies.  
5. If a rated output value not defined in the tables is below the midpoint between two  
consecutive power ratings, the efficiency standard shall be the lower of the two 
efficiencies.