Requirements on Energy Efficiency and the Inspection of 
Low-Voltage Three-Phase Squirrel-Cage Induction Motors
(including as a component of specified equipment ) (Draft)
Basis: Paragraph 1 and 4, Article 14 of the Energy Management Act
Content: 
I. Scope of applicability
The low-voltage three-phase squirrel-cage induction motors including as a 
component of specified equipment in this announcement shall meet the definitions
in CNS14400 or recognized by the Bureau of Energy of Ministry of Economic 
Affairs, and the rated output power is in 0.75kW/1hp ~ 200kW/270hp.
The specified equipment designate in this announcement is pump, air 
compressor and fan.
II. Energy efficiency registration
The manufacturers or importers of motors must register their firm and list 
energy efficiency of motors to obtain permission by Central Competent Authority.
III. Energy consumption rate and efficiency label 
(I) Posting and the contents of label
While displaying, selling, manufacturing or importing low-voltage 
three-phase squirrel-cage induction motors (including as a component of specified 
equipment), manufacturers or importers shall label nameplates, including the 
following items in Chinese fixed to part of an induction motor, according to 
CNS14400, and shall not hide, destroy or adopt other means causing the label 
illegible to the consumers.
1. Name (three-phase squirrel-cage high-efficiency induction motor);
2. Insulation class (A eEeBeF or H class);
3. Number of poles;
4. Rated output power (kW or HP);
5. Rated voltage (V);
6. Rated frequency (Hz);
7. Current (approximately primary current at rated output, A)
8. Rated speed(speed in revolutions per minute at the rated output, rpm)
9. Symbol for the degree of protection by enclosure (IP code);
10. Symbol for cooling method (IC code);
11. Temperature of coolant (can be omitted if the temperature is 40 Ċ);
12. Symbol of motor type;
13. Serial number and year of manufacture;14. Manufacturer ′s name or trade name;
15. Efficiency at rated load; 
16.Type of efficiency (IE2 or IE3)
2. Energy efficiency requirements
Energy efficiency requirements for low-voltage three-phase squirrel-cage 
induction motors (including as a component of specified equipment) shall meet 
table 1and table 2.
3.Post-market surveillance actions
While monitoring the implementation of the energy efficiency requirements, 
the Central Competent Authority may conduct annual product sampling and testing; 
the Central Competent Authority may designate the sampled products and 
manufacturers or importers shall send the product samples to designated testing 
laboratory within the allowed time. 
While manufacturers or importers of the specified equipment designate in 
this announcement can not provide the sampled products, they must have consent 
of Central Competent Authority and then submit documents for efficiency 
conformity instead of testing samples.
In principle, the number of products first sampled and tested from 
manufacturers or importers of motors shall be decided based on the sales number 
of products of the previous year, and one sample shall be tested out of 5,000 units 
of such products sold, but 10 samples are the maximum quantities on each 
sampling and testing for each manufacturer or importer .If less than 5,000 units 
were sold for that product in the prior year, one sample shall be tested, Nonetheless, 
the Central Competent Authority may change the sampling ratio based on actual 
needs.Table 1
IE2 energy efficiency requirements for low-voltage three-phase squirrel-cage 
induction motors
Effective date Jan. 1, 2015~June 30,2016
Rated output power2pole 4pole 6pole
Synchronous 
speed (rpm)Rated full- load 
efficiency 
η(%)Synchronous 
speed (rpm)Rated full- load 
efficiency 
η(%)Synchronous 
speed (rpm)Rated full- load 
efficiency 
η(%)
kWHP
(reference)60HzTotally 
enclosed
(TE)
typeDrip 
proof 
type60HzTotally 
enclosed
(TE)
typeDrip 
proof 
type60HzTotally 
enclosed
(TE)
typeDrip 
proof 
type
0.75 1
360075.5 -
180082.5 82.5
120080.0 80.0
1.1 1.5 82.5 82.5 84.0 84.0 85.5 84.0
1.5 2 84.0 84.0 84.0 84.0 86.5 85.5
2.2 3 85.5 84.0 87.5 86.5 87.5 86.5
3.7 5 87.5 85.5 87.5 87.5 87.5 87.5
5.5 7.5 88.5 87.5 89.5 88.5 89.5 88.5
7.5 10 89.5 88.5 89.5 89.5 89.5 90.2
11 15 90.2 89.5 91.0 91.0 90.2 90.2
15 20 90.2 90.2 91.0 91.0 90.2 91.0
18.5 25 91.0 91.0 92.4 91.7 91.7 91.7
22 30 91.0 91.0 92.4 92.4 91.7 92.4
30 40 91.7 91.7 93.0 93.0 93.0 93.0
37 50 92.4 92.4 93.0 93.0 93.0 93.0
45 60 93.0 93.0 93.6 93.6 93.6 93.6
55 75 93.0 93.0 94.1 94.1 93.6 93.6
75 100 93.6 93.0 94.5 94.1 94.1 94.1
90 125 94.5 93.6 94.5 94.5 94.1 94.1
110 150 94.5 93.6 95.0 95.0 95.0 94.5
150 200 95.0 94.5 95.0 95.0 95.0 94.5
185~200 250~270 95.4 95.2 95.4 95.6 95.0 95.4
Note:
1.η is the rated full-load efficiency. Full-load efficiency is measured according to 
CNS14400 ” Low-voltage three-phase squirrel-cage high-efficiency induction motors (for 
general purpose)” or in accordance with test standard prescribed by the Central 
Competent Authority.
2. The efficiency marked by the manufacturer on nameplate shall be greater than or equal to 
standard value listed in the above table.
3. The tested value of full- load efficiency shall not be less than the marked value η'on the 
product minus tolerance ε, where εis calculated as follows:
ƽ= (1Ñη') Ò15% (for rated output power 	≤150kW)
ƽ= (1Ñη')Ò10% (for rated output power ×150kW)
4. The tested value of full- load efficiency (%) is rounded off to the first decimal place, with 
the second decimal place rounded off.
5. If a rated output power value not defined in the tables is at or above the midpoint between 
two consecutive power ratings, the efficiency shall be the higher of the two efficiencies. 
6. If a rated output power value not defined in the tables is below the midpoint between two 
consecutive power ratings, the efficiency shall be the lower of the two efficiencies.Table 2
IE3 energy efficiency requirements for low-voltage three-phase squirrel-cage 
induction motors
Effective date July. 1, 2016
Rated output power2pole 4pole 6pole
Synchronous 
speed (rpm)Rated full- load 
efficiency 
η(%)Synchronous 
speed (rpm)Rated full- load 
efficiency 
η(%)Synchronous 
speed (rpm)Rated full- load 
efficiency 
η(%)
kWHP
(reference)60HzTotally 
enclosed
(TE)
typeDrip 
proof 
type60HzTotally 
enclosed
(TE) 
typeDrip 
proof 
type60HzTotally 
enclosed
(TE) 
typeDrip 
proof 
type
0.75 1
360077.0 77.0
180085.5 85.5
120082.5 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
90 125 95.0 94.1 95.4 95.4 95.0 95.0
110 150 95.0 94.1 95.8 95.8 95.8 95.4
150 200 95.4 95.0 96.2 95.8 95.8 95.4
185~200 250~270 95.8 95.4 96.2 96.0 95.8 95.8
Note:
1.η is the rated full-load efficiency. Full-load efficiency is measured according to 
CNS14400 ” Low-voltage three-phase squirrel-cage high-efficiency induction motors (for 
general purpose)”  or in accordance with test standard prescribed by the Central 
Competent Authority.
2. The efficiency marked by the manufacturer on nameplate plate shall be greater than or 
equal to standard value listed in the above table.
3. The tested value of full- load efficiency shall not be less than the marked value η'on the 
product minus tolerance ε, where εis calculated as follows:
ƽ= (1Ñη') Ò15% (for rated output power 	≤150kW)
ƽ= (1Ñη') Ò10% ( for rated output power ×150kW)
4. The tested value of full- load efficiency (%) is rounded off to the first decimal place, with 
the second decimal place rounded off.
5. If a rated output power value not defined in the tables is at or above the midpoint between 
two consecutive power ratings, the efficiency shall be the higher of the two efficiencies. 
6. If a rated output power value not defined in the tables is below the midpoint between two 
consecutive power ratings, the efficiency shall be the lower of the two efficiencies.