GB/T 21971-2020
YZD series multi-speed three-phase induction motors for crane application—Technical specification (English Version)

Standard No.

GB/T 21971-2020

Language

Chinese, Available in English version

Release Date

2020

Published By

国家市场监督管理总局、中国国家标准化管理委员会

Latest

GB/T 21971-2020

Replace

GB/T 21971-2008

Scope

This standard specifies the type, basic parameters and dimensions, technical requirements, test methods, inspection rules, marking, packaging and warranty period of YZD series multi-speed three-phase asynchronous motors for lifting. This standard applies to multi-speed three-phase asynchronous motors (frame numbers 112 to 250) (hereinafter referred to as "motors") used for electric transmission of various lifting machinery. All series of motors derived from this series of motors can be implemented with reference.

GB/T 21971-2020 Referenced Document

• GB 20237 Safety requirements of crane and metallurgical motors and canned motors
• GB/T 10068 Mechanical vibration of certain machines with shaft heights 56 mm and higher—Measurement, evaluation and limits of vibration severity
• GB/T 10069.1 Measurement of airborne noise emitted by rotating electrical machines and the noise limits Part 1: Method for the measurement of airborne noise emitted by rotating electrical machines
• GB/T 10069.3 Measurement of airborne noise emitted by rotating electrical machines and the noise limits - Part 3:Noise limits
• GB/T 1032 Three-phase asynchronous motor test methods*， 2023-09-07 Update
• GB/T 1096 Square and Rectangular keys
• GB/T 191 Packaging.Pictorial marking for handling of goods
• GB/T 1958 Geometrical Product Specifications(GPS)—Geometrical tolerance—Verification
• GB/T 1971 Rotating electrical machines—Terminal markings and direction of rotation*， 2021-10-11 Update
• GB/T 1993 Cooling methods for rotating electrical machines
• GB/T 21975 Method of test for reliability of three-phase induction motors for crane and metallurgical application
• GB/T 22719.1 Interturn insulation of random-wound winding for AC low-voltage electrical machines.Part 1:Test methods
• GB/T 22719.2 Interturn insulation of random-wound winding for AC low-voltage electrical machines.Part 2:Test limits
• GB/T 4772.1 Dimensions and output series for rotating electrical machines. Part 1: Frame numbers 56 to 400 and flange numbers 55 to 1080
• GB/T 4942.1 Degrees of protection provided by the integral design of rotating electrical machined (IP code) - Classification
• GB/T 755 Rotating electrical machines—Rating and performance
• GB/T 756 Cylindrical shaft extension for rotating electrical machines
• GB/T 757 Conical shaft extension for rotating electrical machines
• GB/T 997 Classification of types of construction，mounting arrangements and terminal box position (IM Code) for rotating electrical machines*， 2022-10-14 Update

GB/T 21971-2020 history

• 2020 GB/T 21971-2020 YZD series multi-speed three-phase induction motors for crane application—Technical specification
• 2008 GB/T 21971-2008 Technical specifications for YZD range of multi-speed three-phase induction motors for crane application