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GB 30254-2024: Minimum allowable values of energy efficiency and energy efficiency grades for cage three-phase high voltage induction motor
GB 30254-2024
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 27.010
CCS F 01
Replacing GB 30254-2013
Minimum Allowable Values of Energy Efficiency and
Energy Efficiency Grades for Cage Three-Phase High
Voltage Induction Motor
ISSUED ON: AUGUST 23, 2024
IMPLEMENTED ON: SEPTEMBER 1, 2025
Issued by: State Administration for Market Regulation;
Standardization Administration of the People’s Republic of China.
Table of Contents
Foreword ... 3
1 Scope ... 5
2 Normative References ... 5
3 Terms and Definitions ... 6
4 Energy Efficiency Grades ... 6
5 Technical Requirements ... 6
6 Test Methods ... 6
Foreword
This Document was drafted as per the rules specified in GB/T 1.1-2020 Directives for
Standardization – Part 1: Rules for the Structure and Drafting of Standardizing Documents.
This Document replaced GB 30254-2013 Minimum Allowable Values of Energy Efficiency and
the Energy Efficiency Grades for Cage Three-phase High Voltage Induction Motor. Compared
with GB 30254-2013, the major technical changes of this Document are as follows besides the
structural adjustments and editorial modifications:
a) Change the scope of the standard (see Clause 1 of this Edition; Clause 1 of the 2013
Edition);
b) Delete the energy-saving evaluation value of cage three-phase high voltage induction
motors (see 3.2 of the 2013 Edition);
c) Add the requirements for the energy efficiency limit value of motors (see 5.2 of this
Edition; 4.3 of the 2013 Edition);
d) Delete the requirements for the energy-saving evaluation value of motors (see 4.4 of the
2013 Edition);
e) Change the range of application of the test method for rated power (see Clause 6 of this
Edition; Clause 5 of the 2013 Edition);
f) Add the energy efficiency rating indicators of cage three-phase high voltage induction
motors with 2 poles (rated power 3,550 kW~10,000 kW) under 3 kV (3.3 kV) and 6 kV
voltage IC01, IC11, IC21, IC31, IC81W cooling methods (see Table 1 of this Edition;
Table 1 of the 2013 Edition);
g) Add energy efficiency rating indicators for cage three-phase high voltage induction
motors with 2 poles (rated power 2,500 kW~10,000 kW) under 10 kV voltage IC01, IC11,
IC21, IC31, IC81W cooling methods (see Table 2 of this Edition; Table 2 of the 2013
Edition);
h) Add energy efficiency rating indicators for cage three-phase high voltage induction
motors with 2 poles (rated power 2,800 kW~10,000 kW), 4 poles (rated power 2,500
kW~10,000 kW), 6 poles (rated power 1,800 kW~8,000 kW), and 8 poles (rated power
1,400 kW~6,300 kW) , 10 poles (rated power 1,250 kW~5,000 kW), 12 poles (rated
power 900 kW~4,000 kW) under 3 kV (3.3 kV) and 6 kV voltage IC611, IC616, IC511,
IC516 cooling methods (see Table 3 of this Edition; Table 3 of the 2013 Edition);
i) Added energy efficiency rating indicators for cage three-phase high voltage induction
motors under 10 kV voltage IC611, IC616, IC511, and IC516 cooling methods (see Table
4 of this Edition);
Minimum Allowable Values of Energy Efficiency and
Energy Efficiency Grades for Cage Three-Phase High
Voltage Induction Motor
1 Scope
This document specifies the energy efficiency level, technical requirements and test methods
of high-voltage three-phase cage-type asynchronous motors (hereinafter referred to as
"motors").
This document is applicable to 50 Hz three-phase AC power supply, continuous working
vertical, horizontal motors and explosion-proof motors, with 2 poles to 12 poles, voltage,
cooling method, rated power range as follows:
a) Under 3 kV (3.3 kV) and 6 kV voltage, IC01, IC11, IC21, IC31, IC81W cooling method,
rated power is 200 kW to 25,000 kW;
b) Under 10 kV voltage, IC01, IC11, IC21, IC31, IC81W cooling method, rated power is
200 kW to 22,400 kW;
c) Under 3 kV (3.3 kV) and 6 kV voltage, IC611, IC616, IC511, IC516 cooling method,
rated power is 200 kW to 10,000 kW;
d) Under 10 kV voltage, IC611, IC616, IC511, IC516 cooling method, rated power is 200
kW~10,000 kW;
e) Under 3 kV (3.3 kV) and 6 kV voltage, IC411 cooling method, rated power is 200
kW~3,150 kW;
f) Under 10 kV voltage, IC411 cooling method, rated power is 200 kW~2,800 kW.
2 Normative References
The provisions in following documents become the essential provisions of this Document
through reference in this Document. For the dated documents, only the versions with the dates
indicated are applicable to this Document; for the undated documents, only the latest version
(including all the amendments) is applicable to this Document.
GB/T 755 Rotating electrical machines - Rating and performance
GB/T 1032-2023 Test methods of three-phase induction motors
3 Terms and Definitions
For the purposes of this Document, the following terms and definitions apply.
3.1 Minimum allowable values of energy efficiency for cage three-phase high voltage
induction motor
Under specified test conditions, the lowest standard value of the efficiency of cage three-phase
high-voltage induction motors is allowed.
4 Energy Efficiency Grades
The energy efficiency grade of motors is divided into 3 grades, among which Grade-1 has the
highest energy efficiency. The measured efficiency of motors of each grade at rated output
power shall be no lower than the requirements of Tables 1 to 6, and the tolerance shall comply
with the provisions of GB/T 755.
Within the specified range, the efficiency of motors whose rated power values are not listed in
the table is determined by linear interpolation.
5 Technical Requirements
The requirements for energy efficiency limit values of motors are as follows:
a) The measured efficiency of motors under 3 kV (3.3 kV) and 6 kV, 10 kV voltages and
IC01, IC11, IC21, IC31, IC81W cooling methods at rated output power shall be no lower
than the provisions of Grade-3 in Tables 1 and 2;
b) The measured efficiency of motors under 3 kV (3.3 kV) and 6 kV, 10 kV voltages and
IC611, IC616, IC511, IC516 cooling methods at rated output power shall be no lower
than the requirements of Grade-3 in Tables 3 and 4;
c) The measured efficiency of motors under 3 kV (3.3 kV) and 6 kV, 10 kV voltages and
IC411 cooling methods at rated output power shall be no lower than the requirements of
Grade-3 in Tables 5 and 6.
6 Test Methods
For motors with a rated power of 2,000 kW or less, the power loss shall be determined according
to the Method-B (loss analysis method for measuring input and output power) specified in 12.3
of GB/T 1032-2023. For motors with a rated power of more than 2,000 kW, the power loss shall