GB/T 21210-2026Starting performance of single-speed three-phase cage induction motors (English PDF)

1 Scope 1

2 Normative References 1

3 Terms and Definitions 2 4 symbols 3

5 Design code 3

6 N design requirements 4

7 Startup requirements for NE design 5

8 Startup requirements for NY and NEY designs 5

10 HE design start-up requirements 6

11 Startup requirements for HY and HEY designs 6

12.Determine current and torque through measurement. 6.

Appendix A (Informative) Locked Rotor Current and Locked Rotor Torque Characteristics 14

Appendix B (Informative) Calibration Method for Pressure Drop Test 17

Reference 18

Figure A.1 Relationship between locked rotor current/rated current (multiple) and time 14

Figure A.2 Relationship between stall torque/rated torque (multiple) and time 14

Figure A.3 Relationship between stall torque and rotor position 15

Figure A.4 Relationship between stall torque and rotor position 15

Figure A.5 Changes in speed (top left), torque (bottom left), phase voltage (top right), and phase current (bottom right) over time during star-delta startup.

Process(s) 16

Table 1.Minimum values of various torques in the N design (8)

Table 2.Maximum apparent power of N and H in design stall mode. (9)

Table 3.Maximum Apparent Power of NE and HE Designs (Stalled) 9

Table 4.Load moment of inertia (J) 9

Table 5 Minimum values of various torques in H design 11

Table 6 Minimum Torque Values of Various Motors in the "Exeb Increased Safety Type" N Design 11

Table 7 Load moment of inertia (J) of "Exeb increased safety type" motor 12

This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1: Structure and Drafting Rules of Standardization Documents".

Drafting.

This document replaces GB/T 21210-2016 "Starting Performance of Single-Speed Three-Phase Cage Induction Motors" and is consistent with GB/T 21210-2016.

Compared to previous versions, aside from structural adjustments and editorial changes, the main technical changes are as follows.

---Added methods for determining current and torque through measurement (see Chapter 12).

This document is equivalent to IEC 60034-12:2024 "Rotating electrical machines - Part 12: Starting performance of single-speed three-phase squirrel-cage induction motors".

The following minimal editorial changes have been made to this document.

---To align with existing standards, the standard name has been changed to "Starting Performance of Single-Speed Three-Phase Cage Induction Motors".

Please note that some content in this document may involve patents. The issuing organization of this document assumes no responsibility for identifying patents.

This document was proposed by the China Electrical Equipment Industry Association.

This document is under the jurisdiction of the National Technical Committee on Standardization of Rotating Electrical Machines (SAC/TC26).