GB20237-2006

Safety requirements of crane & metallurgical motors and canned motors

起重冶金和屏蔽电机安全要求

GB 20237-2006 は現行の中国強制国家規格です：Safety requirements of crane & metallurgical motors and canned motors。業界：電子。テーマ：製品安全。施行日：2007年1月1日。

適用可否は製品範囲、認証ルート、所管当局の通知、移行規定によって異なります。コンプライアンス判断に使う前に、翻訳をご依頼いただくか公式情報源をご確認ください。

コンプライアンス概要

この概要は現在英語のみで提供しています。

適用範囲

This standard applies to the safety requirements of crane and metallurgical motors (including eddy current brakes), elevator motors, tower cranes, and construction machinery motors. It also covers canned motors used in the petroleum and chemical industries for conveying fluids without solid particles. It is applicable to various lifting machinery, metallurgical auxiliary equipment, and power transmission equipment.

技術要求

This standard specifies comprehensive safety requirements for the structural integrity and electrical safety of the aforementioned motors. It mandates that motors must comply with the general requirements of GB 755-2000 and maintain sufficient insulation resistance under room temperature, thermal, and damp conditions. Manufacturers must ensure that motors do not experience hazardous electrical or mechanical failures during normal use. The standard details specific structural requirements, including the mechanical strength of non-metallic components, which must be flame-retardant, heat-resistant, and moisture-proof. It sets forth strict guidelines for terminal boxes (rated below 750V), requiring a minimum protection degree of IP44 and specifying minimum thicknesses for metallic enclosures. Clearance and creepage distances are strictly regulated to prevent electrical arcing, with specific parameters varying by motor frame size and voltage rating. Furthermore, the standard outlines requirements for protective earthing devices, ensuring permanent and reliable electrical connections between the motor frame and the earth terminal. It also dictates the mechanical strength of bearing structures, slip rings, and connecting components, requiring that fasteners withstand operational mechanical stresses without loosening. All rotating components must be capable of safe operation, including under overspeed conditions. For specialized applications, such as high-voltage motors (1000V and above) and canned motors, the standard imposes additional structural and testing criteria. High-voltage motors require specific internal wiring arrangements and warning labels for high-voltage hazards. Canned motors must guarantee zero leakage of pumped fluids, requiring robust mechanical strength and sealing performance for circulation pipes and shielding sleeves. Even in the event of a stator shield failure, the terminal box must prevent fluid leakage.

試験方法

The standard mandates a series of rigorous testing procedures to verify compliance. Key tests include the Thermal Test to evaluate temperature rises under various duty cycles, and Insulation Resistance and Withstand Voltage Tests (both power-frequency and impulse) to ensure electrical safety. Environmental and mechanical durability are assessed through Damp Heat Tests, Impact Tests, and Static Pressure Tests on terminal boxes. Additionally, it specifies Insulation Structure Evaluation for thermal and electrical endurance, alongside Aging, Ball-Pressure, and Flammability tests for non-metallic materials.

よくある質問

What products are regulated under GB 20237-2006?

The standard regulates crane and metallurgical motors (including eddy current brakes), elevator motors, tower crane motors, conical rotor motors, and canned motors used in industries like petroleum and chemical processing.

Is compliance with GB 20237-2006 mandatory for market access in China?

Yes, the standard explicitly states that all technical content is mandatory. Manufacturers must comply with these requirements to sell the specified motors in China.

How does GB 20237-2006 relate to international IEC standards?

The standard primarily references GB 755-2000 (IEC 60034-1) for general rotating machine requirements, but it also incorporates specific Chinese mechanical and structural safety criteria, along with references to IEC 60034-18-22 and IEC 60034-18-31 for insulation system evaluations.

The summary above provides a high-level overview of GB 20237-2006. To ensure complete compliance for your products entering the Chinese market, a precise and professional translation of the full technical specifications is essential. Purchase our high-quality English translation of GB 20237-2006 today to access all detailed parameter tables, specific clearance dimensions, and comprehensive testing procedures.

適用のヒント

種別: 安全
CCS: K26
ICS: 29.160.30
所管部門: Ministry of Industry and Information Technology
技術委員会: Ministry of Industry and Information Technology