GB/T 21974-2024 English PDFUS$479.00 · In stock
Delivery: <= 4 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 21974-2024: YZRW series eddy-current braking wound-rotor three-phase induction motors for crane and metallurgical applications - Technical specification (frame size 112～315) Status: Valid GB/T 21974: Historical versions
Basic dataStandard ID: GB/T 21974-2024 (GB/T21974-2024)Description (Translated English): YZRW series eddy-current braking wound-rotor three-phase induction motors for crane and metallurgical applications - Technical specification (frame size 112��315) Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: K26 Word Count Estimation: 24,221 Date of Issue: 2024-08-23 Date of Implementation: 2024-08-23 Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration GB/T 21974-2024: YZRW series eddy-current braking wound-rotor three-phase induction motors for crane and metallurgical applications - Technical specification (frame size 112～315)---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order. ICS 29.160.30 CCSK26 National Standard of the People's Republic of China Replace GB/T 21974-2008 YZRW series eddy current brake wound rotor for lifting and metallurgy Technical specification of three-phase asynchronous motor (Frame No. 112~315) (framesize112~315) Released on 2024-08-23 2025-03-01 Implementation State Administration for Market Regulation The National Standardization Administration issued Table of ContentsPreface III 1 Scope 1 2 Normative references 1 3 Terms and Definitions 2 4 Type, basic parameters and dimensions 2 5 Technical Requirements 7 6 Test methods 11 7 Inspection Rules 11 8 Marking, packaging and warranty period 13 Appendix A (Normative) Motor thermal test method 15 Appendix B (Normative) Test method for rated braking torque and mechanical characteristic curve of eddy current brake 16 Figure 1 IM1001, IM1003 horizontal motor with base and end cover without flange Figure 2 IM3011, IM3013 vertical motor with base without feet and end cover with flange Figure B.1 Test circuit for eddy current brake 16 Figure B.2 Mechanical characteristic curve of eddy current brake 17 Table 1 Motor structure and installation type 2 Table 2 Rated power of the motor, rotor moment of inertia Jm1, rotor winding open circuit voltage U2 and rated braking of the eddy current brake The corresponding relationship between torque and limited braking torque, armature moment of inertia Jm2 and frame number 3 Table 3 IM1001, IM1003 horizontal installation motor with base and end cover without flange 4 Table 4 IM3011, IM3013 vertical motors with bases without feet and end covers with flanges 5 Table 5 Dimensions and tolerances of shaft extension keys 6 Table 6 Radial runout tolerance 6 Table 7 Radial and axial runout tolerances 6 Table 8 Parallelism tolerance 6 Table 9 Flatness tolerance 7 Table 10 Symmetry tolerance of shaft keyway 7 Table 11 Guaranteed value of the ratio of maximum torque to rated torque 8 Table 12 Temperature rise limits or allowable temperatures of various heating parts of motors 8 Table 13 Vibration intensity limits (effective values) expressed by displacement and velocity for different axis center heights H 9 Table 14 A-weighted sound power level noise limits at no load 10 Table 15 Inspection items and test methods 12 Table 16 Outlet terminal marking 13ForewordThis document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1.Structure and drafting rules for standardization documents" Drafting. This document replaces GB/T 21974-2008 "Technical Specification for YZRW Series Eddy Current Braking Wound Rotor Three-Phase Asynchronous Motors for Hoisting and Metallurgy" Compared with GB/T 21974-2008, in addition to structural adjustments and editorial changes, the main technical changes are as follows. --- Added motor models and examples (see 4.1); --- Changed the protection level of the motor (see 4.2, 4.1 of the.2008 edition); ---Change the frame sizes 315S1, 315S2 and 315M corresponding to rated power 55kW, 75kW and 90kW to 315S and 315M Corresponding to 55kW and 75kW (see Table 2, Table 2 of the.2008 edition); ---Changed the D1 size of the frame size 180L in Table 3 and Table 4, changed the frame size 180L~315M in Table 3 and the frame size in Table 4 E1 limit deviation for 180L~225M, changed K basic dimension and position tolerance for frame size 160M~225M in Table 3 The basic dimensions and position tolerances of the S for frame sizes 112M~225M in Table 4 have been changed, and the tolerances of the S for frame sizes 112M~225M in Table 4 have been added. The T limit deviation of 225M has been increased, and the shaft extension key dimensions and tolerances of the shaft extension diameter 95 in Table 5 have been added (see Table 3 to Table 5,.2008 Edition Table 3 to Table 5); --- Changed the limit deviation of key width (see Table 5, Table 5 of the.2008 edition); --- Added "The deviation of any phase of the DC resistance of the three-phase stator winding of the motor in the actual cold state from the average value of the three phases should not exceed ±2% of the mean value” (see 5.8); --- Added "cold insulation resistance should not be less than 5MΩ" (see 5.9); --- Added 1s withstand voltage test (see 5.10); --- Changed the requirements for motor vibration and noise (see 5.16 and 5.17, 5.17 and 5.18 of the.2008 edition); --- Deleted the provisions on the unevenness of the air gap of the motor, and cancelled the inspection of the unevenness of the air gap accordingly (see.2008 edition 5.19); --- Added "The grounding terminal should not be used for other purposes except for protective grounding" (see 5.19); --- Increased the requirements for motor reliability (see 5.21); --- Added requirements for the direction of rotation of the motor (see 5.22); --- Added requirements for motor appearance and assembly quality (see 5.24); --- Added the test of conventional items of motor (see 5.25); --- Change the inspection rules in Chapter 6 to test methods in Chapter 6 and inspection rules in Chapter 7.The inspection rules are expressed in tabular form (see Chapters 6 and 7, Chapter 6 of the.2008 edition); --- Added the "Cooling method" item (see 8.2); --- Added requirements for outlet marking and wiring marking diagram (see 8.3 and 8.4). Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the 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 for Standardization of Rotating Electrical Machines (SAC/TC26). This document was drafted by. Jiamusi Explosion-proof Motor Research Institute Co., Ltd., Jiamusi Motor Co., Ltd., Shanxi Motor Manufacturing Co., Ltd. Company, Anhui Wannan Electric Motor Co., Ltd., Jiangsu Special Equipment Safety Supervision and Inspection Institute, Jiangxi Gongchuang Technology Collaborative Innovation Co., Ltd. Company, Daqing Huayu Petroleum Machinery Manufacturing Co., Ltd. The main drafters of this document are. Wang Weiyue, Wang Anguo, Kong Xiangyong, Li Wei, Xu Chenxu, Wang Liping, Qu Jihua and Xi He. The previous versions of this document and the documents it replaces are as follows. ---First published in.2008 as GB/T 21974-2008; ---This is the first revision. YZRW series eddy current brake wound rotor for lifting and metallurgy Technical specification of three-phase asynchronous motor (Frame No. 112~315)1 ScopeThis document defines the terms and definitions of YZRW series eddy current brake wound rotor three-phase asynchronous motors for lifting and metallurgical applications, and specifies It describes the type, basic parameters and dimensions, and technical requirements, describes the corresponding test methods, and stipulates the inspection rules as well as the marking, packaging and storage Use period. This document is applicable to eddy current brake wound rotor three-phase asynchronous motors (base) for electric transmission of various lifting machinery and metallurgical auxiliary equipment No. 112~315) and the manufacture of eddy current brakes.2 Normative referencesThe contents of the following documents constitute essential clauses of this document through normative references in this document. For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to This document. GB/T 191 Pictorial markings for packaging, storage and transportation GB/T 755 Ratings and performance of rotating electrical machines GB/T 756 Cylindrical shaft extensions for rotating electrical machines GB/T 757 Conical shaft extensions for rotating electrical machines GB/T 997 Classification of structural types, installation types and terminal box positions of rotating electrical machines (IM code) GB/T 1032 Test methods for three-phase asynchronous motors GB/T 1096 Ordinary flat key GB/T 1958 Geometrical Product Specifications (GPS) Geometric Tolerance Testing and Verification GB/T 1971 Terminal marking and direction of rotation of rotating electrical machines GB/T 1993 Cooling methods for rotating electrical machines GB/T 2423.4 Environmental testing for electric and electronic products Part 2.Test method Test Db. Cyclic damp heat (12h 12h cycle) GB/T 4772.1 Dimensions and output power classes of rotating electrical machines Part 1.Frame sizes 56 to 400 and flange sizes 55 to 1080 GB/T 4831 Method for compiling product models of rotating electrical machines GB/T 4942 Protection degree of rotating electrical machine integral structure (IP code) Classification GB/T 10068 Mechanical vibration of motors with shaft center height of 56 mm and above - Measurement, evaluation and limits of vibration GB/T 10069.1 Measurement methods and limits for noise from rotating electrical machines Part 1.Measurement methods for noise from rotating electrical machines GB/T 10069.3 Noise measurement methods and limits for rotating electrical machines Part 3.Noise limits GB 20237 Safety requirements for lifting metallurgy and shielded motors GB/T 21975 Reliability test method for three-phase asynchronous motors for hoisting and metallurgy GB/T 22719.1 Interturn insulation of loose-fitting windings of AC low-voltage motors Part 1.Test methods GB/T 22719.2 Interturn insulation of loose-fit windings of AC low-voltage motors Part 2.Test limits ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 21974-2024_English be delivered?Answer: Upon your order, we will start to translate GB/T 21974-2024_English as soon as possible, and keep you informed of the progress. 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Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.Question 5: Should I purchase the latest version GB/T 21974-2024?Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 21974-2024 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically. |
