On October 27, 2023, the National Energy Foundation and Management Standardization Technical Committee (TC20) invited public input on two mandatory national standards: " Minimum allowable values of energy efficiency and energy efficiency grades for permanent magnet synchronous motors" and "Minimum allowable values of energy efficiency and the energy efficiency grades for cage three-phase high voltage induction motor." The deadline for submitting comments is December 26, 2023.
The standard "Minimum allowable values of energy efficiency and energy efficiency grades for permanent magnet synchronous motors" aims to replace GB 30253-2013. In comparison to GB 30253-2013, the main technical changes include:
a) Expansion of the standard's scope.
b) Removal of target energy efficiency limit values and motor energy-saving evaluation values for permanent magnet synchronous motors.
c) Modification of energy efficiency limit value requirements for asynchronous start three-phase permanent magnet synchronous motors with voltages of 1140V and below.
d) Addition of energy efficiency limit value requirements for asynchronous start three-phase permanent magnet synchronous motors with rated power between 400kW and 1000kW for voltages of 1140V and below, as well as for voltage levels of 3000V (3300V), 6000V, and 10000V.
e) Modification of energy efficiency limit value requirements for permanent magnet synchronous motors used in elevators.
f) Modification of energy efficiency limit value requirements for variable frequency drive permanent magnet synchronous motors with voltages below 1140V.
g) Removal of energy efficiency limit value requirements for variable frequency drive permanent magnet synchronous motors with voltages below 1140V and speeds of 2000r/min and 2500r/min.
h) Addition of energy efficiency limit value requirements for variable frequency drive permanent magnet synchronous motors with voltages below 1140V and speeds in the range of 45r/min to 500r/min, as well as for speeds of 750r/min and rated power between 110kW and 1250kW.
i) Addition of energy efficiency limit value requirements for variable frequency drive permanent magnet synchronous motors with voltage levels of 3000V (3300V) and 6000V.
j) Addition of energy efficiency limit value requirements for variable frequency drive permanent magnet synchronous motors with a voltage level of 10000V.
The standard "Minimum allowable values of energy efficiency and the energy efficiency grades for cage three-phase high voltage induction motor" is intended to replace GB 30254-2013. In comparison to GB 30254-2013, the primary technical changes are as follows:
a) Modification of the standard's scope.
b) Removal of energy-saving evaluation values for high-voltage three-phase cage induction motors.
c) Addition of efficiency limit value requirements for high-voltage three-phase cage induction motors with 6kV voltage level, 2 poles, and rated power between 3550kW and 10000kW, with cooling methods IC01, IC11, IC21, IC31, and IC81W.
d) Addition of efficiency limit value requirements for high-voltage three-phase cage induction motors with 10kV voltage level, 2 poles, and rated power between 2500kW and 10000kW, with cooling methods IC01, IC11, IC21, IC31, and IC81W.
e) Addition of efficiency limit value requirements for high-voltage three-phase cage induction motors with 6kV voltage level, cooling methods IC611, IC616, IC511, and IC516, for 2 poles (rated power 2800kW~10000kW), 4 poles (rated power 2500kW-10000kW), 6 poles (rated power 1800kW-8000kW), 8 poles (rated power 1400kW-6300kW), 10 poles (rated power 1250kW-5000kW), and 12 poles (rated power 900kW-4000kW).
f) Addition of efficiency limit value requirements for high-voltage three-phase cage induction motors with 10kV voltage level and cooling methods IC611, IC616, IC511, and IC516.
g) Modification of efficiency limit value requirements for high-voltage three-phase cage induction motors with 6kV voltage level and cooling method IC411.
h) Addition of efficiency limit value requirements for high-voltage three-phase cage induction motors with 6kV voltage level, cooling method IC411, and rated power between 1800kW and 3150kW.
i) Addition of efficiency limit value requirements for high-voltage three-phase cage induction motors with 10kV voltage level and cooling method IC411.