GB 30254-2024 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 grades, technical requirements, and test methods for cage three-phase high voltage induction motor (hereinafter referred to as "the motor").
This document is applicable to vertical, horizontal, and explosion-proof motors powered by 50 Hz three-phase AC power supply and operating continuously. The number of poles ranges from 2 to 12, and the voltage, cooling method, and rated power range are as follows:
a) Voltage: 3 kV (3.3 kV) and 6 kV; cooling methods: IC01, IC11, IC21, IC31, IC81W; rated power: 200 kW~25,000 kW;
b) Voltage: 10 kV; cooling methods: IC01, IC11, IC21, IC31, IC81W; rated power: 200 kW~22,400 kW;
c) Voltage: 3 kV (3.3 kV) and 6 kV; cooling methods: IC611, IC616, IC511, IC516; rated power: 200 kW~10,000 kW;
d) Voltage: 10 kV; cooling methods: IC611, IC616, IC511, IC516; rated power: 200 kW~10,000 kW;
e) Voltage: 3 kV (3.3kV) and 6 kV; cooling method: IC411; rated power: 200 kW~3,150 kW;
f) Voltage: 10 kV; cooling method: IC411; rated power: 200 kW~2,800 kW.
2 Normative references
The following documents contain provisions which, through reference in this text, constitute provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 755 Rotating electrical machines - Rating and performance
GB/T 1032-2023 Test methods for three-phase asynchronous 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
the standard value that allows the lowest efficiency for cage three-phase high voltage induction motor under specified test conditions
4 Energy efficiency grades
The energy efficiency grades for the motor is classified into three, among which Grade 1 is the highest. The measured efficiency of each grade of motor at rated output power shall not be lower than that specified in Tables 1-6, 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 shall be determined using linear interpolation.
5 Technical requirements
Minimum allowable values of energy efficiency for the motor are required as follows:
a) The measured efficiency of the motor with cooling methods IC01, IC11, IC21, IC31, and IC81W at rated output power for voltages of 3kV (3.3kV), 6kV, and 10kV shall not be lower than the provision for Grade 3 in Tables 1 and 2;
Contents
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Energy efficiency grades
5 Technical requirements
6 Test methods
