GB/T 21975-2008 English PDF

US$329.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 21975-2008: Method of test for reliability of three-phase induction motors for crane and metallurgical application
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 21975-2008	329	Add to Cart	3 days	Method of test for reliability of three-phase induction motors for crane and metallurgical application	Valid

Similar standards

GB/T 39631   GB/T 12665   MT/T 575   GB/T 21974   GB/T 21972.2   GB/T 21972.1   

Basic data

Standard ID: GB/T 21975-2008 (GB/T21975-2008)
Description (Translated English): Method of test for reliability of three-phase induction motors for crane and metallurgical application
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: K26
Classification of International Standard: 29.160.30
Word Count Estimation: 14,167
Date of Issue: 2008-06-13
Date of Implementation: 2009-03-01
Regulation (derived from): Announcement of Newly Approved National Standards No. 10 of 2008 (total 123)
Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary: This standard specifies the crane and metallurgical phase asynchronous motor reliability of laboratory test methods, test data processing and reliability assessment. This standard applies to crane and metallurgical phase asynchronous motor (hereinafter referred to as motor) reliability, reliable life, the average life evaluation.

GB/T 21975-2008: Method of test for reliability of three-phase induction motors for crane and metallurgical application

---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.
Method of test for reliability of three-phase induction motors for crane and metallurgical application ICS 29.160.30 K26 National Standards of People's Republic of China Crane and metallurgical three-phase asynchronous motors Reliability Test Methods Posted 2008-06-13 2009-03-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Table of Contents

Preface Ⅰ 1 Scope 1 2 Normative references 1 3 Terms, definitions and symbols 1 4 Sampling 2 5 Test Preparation 2 6 Acceleration Test 2 7 Data Processing 3 Appendix A (normative) table of random numbers and the number of samples in Table 5 Methodology Appendix B (normative) Determination of sample size 7 Annex C (normative) motor load level 8 Annex D (informative) Test Example 9

Foreword

The Standard Appendix A, Appendix B, Appendix C is normative appendix, Appendix D is an informative annex. The standard proposed by China Electrical Equipment Industrial Association. This standard by the National Standardization Technical Committee rotary motor lifting metallurgical and canned motors Standardization Technical Committee (SAC/TC26 / SC3) centralized. This standard was drafted. Jiamusi explosion-proof electrical Institute, Jiamusi Electric Co., Ltd., Wuxi City Fergus Crane Motor shares have Ltd., Nanjing Special Motor Co., Ltd., China Changjiang National Shipping Group Motor Factory, Dalian Koni Motor Co., Ltd. The main drafters. Zhang Liyuan, Li Dongping, Xue Ronghui, Hujian Xing, Tang Qinghua, Li Jiandong at Shuhua. Crane and metallurgical three-phase asynchronous motors Reliability Test Methods

1 Scope

This standard specifies the crane and metallurgical three-phase asynchronous motor reliability of laboratory test methods, test data processing and reliability assessment. This standard applies to crane and metallurgical three-phase asynchronous motor (hereinafter referred to as a motor) reliability, reliable life, average life evaluation.

2 Normative references

The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard. GB 755-2000 rotating motor fixed and performance (idt IEC 60034-1.1996) GB/T 2423.3-1993 electric and electronic products environmental testing procedures Test Ca. Damp heat test method (eqv IEC 60068-2- 3. 1984) GB 10068-2000 shaft heights mechanical vibration measurement of 56mm and above the motor, evaluation and limits (Idt IEC 60034-14.1996) Room Windings insulation test method JB/T 9615.1-2000 AC low-voltage motors fitted scattered JB/T 9615.2-2000 AC low-voltage motors embedded scattered among Windings insulation test limits JB/T 10104-1999 YZ series crane and metallurgical three-phase induction motor JB/T 10105-1999 YZR series crane and metallurgical three-phase induction motors with wound rotor 3 Terms, definitions and symbols The following terms, definitions and symbols apply to this standard. 3.1 Terms and Definitions 3.1.1 Since sampling reasons, the number of unqualified products have been mistaken for a batch of qualified products and to accept it, causing the user suffer overview rate. Represented by β. 3.1.2 When the motor press close to its rated speed in one direction of rotation, due to the change of power phase sequence by its rotational speed "zero" after the other direction Rotated to close to its rated speed, the whole process of reversing counted once. 3.1.3 Accelerated life test to test the whole sample until failure. 3.1.4 Given in advance a certain time (the number of positive and negative), a group of product life test to the time come to an end; according to the number of failures during this period ......

Image     

Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of GB/T 21975-2008_English be delivered?

Answer: Upon your order, we will start to translate GB/T 21975-2008_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 3 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of GB/T 21975-2008_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 21975-2008_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.

Question 3: Does the price include tax/VAT?

Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countries

Question 4: Do you accept my currency other than USD?

Answer: Yes. If you need your currency to be printed on the invoice, please write an email to Sales@ChineseStandard.net. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.