Chinese Motor Standards (GB) vs IEC / NEMA
Understand how our GB series motors map to international IEC and NEMA specifications.
In China, motors are named by national standard (GB) series - such as Z4, YE3, YKK, TYCP - rather than by IEC or NEMA frame numbers. Overseas buyers often ask what these mean. This guide maps each series to the international values that matter for selection: IEC 60034 frame and efficiency class, power range, voltage and typical application.
| Chinese series | Standard | International | Power / voltage | Typical application |
|---|---|---|---|---|
| Z4, Z, ZZJ | GB / JB DC motor series | IEC 60034 | DC motors 0.4 - 1600 kW, 110 - 750 V | Precise speed control, high starting torque - rolling mills, cranes, metallurgy |
| YE3, Y, YKK, YR, YKS | GB three-phase asynchronous | IEC 60034 | Low & high-voltage AC motors 0.55 - 5000 kW, 380 - 10000 V | Pumps, fans, compressors, cement kilns and mills |
| TYCP, TYPKK | GB permanent magnet synchronous | IEC 60034 | PMSM 7.5 - 5000 kW, 380 - 10000 V | Energy-saving variable-speed and direct-drive |
| YBX4, TBGP | GB explosion-proof | IEC 60079 | Flameproof 7.5 - 5000 kW | Oil, chemical and mining environments |
How we build to your standard
- Specify internationally - send power (kW), voltage (V), speed (r/min), efficiency class (IE2 / IE3 / IE4), frame and application.
- We match the series - we choose the right GB series and build the winding, frame and cooling to meet your requirement.
- 50 Hz or 60 Hz - motors are designed for the destination grid frequency and voltage (e.g. 380 V / 400 V, 460 V / 480 V).
- Certifications - ISO9001, ISO14001 and CE, so units are accepted in overseas markets.
Not sure which standard applies to your market?
Send us the application, power, voltage and speed, and we will quote a motor built to your local standard.
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