GB/T 7345-2008 PDF EnglishUS$890.00 · In stock · Download in 9 seconds
GB/T 7345-2008: General requirements for electrical machine for automatic control system Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Valid GB/T 7345: Historical versions
Similar standardsGB/T 7345-2008: General requirements for electrical machine for automatic control system---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT7345-2008GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 29.160.30 K 24 Replacing GB/T 7345-1994 General requirements for electrical machine for automatic control system Issued on. JUNE 30, 2008 Implemented on. APRIL 01, 2009 Issued by. General Administration of Quality Supervision, Inspection and Quarantine of PRC; National Standardization Administration. Table of ContentsForeword... 3 1 Scope... 4 2 Normative references... 5 3 Terms and definitions... 6 4 Categories... 8 5 Technical requirements and test methods... 9 6 Inspection rules... 34 7 Preparation for delivery... 39 8 User services... 40 Appendix A (Normative) Standard test brackets and tooling... 41 Appendix B (Informative) Methods of measuring impedance and brush contact resistance... 49 Appendix C (Informative) Measurement method of rotary inertia... 55 Appendix D (Informative) Measuring method of electromechanical time constant... 621 ScopeThis standard specifies the terms and definitions, classification, basic technical requirements and test methods, inspection rules, delivery preparation, user service requirements for control motors and their combinations (hereinafter referred to as motors). This standard provides basic technical requirements and test methods for motors for organizations which have the following needs. a) It is necessary to prove that the motor product has the ability to meet the requirements of users and applicable laws and regulations; b) Ordering or product acceptance; c) Inspection basis; d) Government or industry regulation of product quality. When the optional provisions in this standard are not applicable due to the characteristics of the motor product, they can be deleted. However, the deletion cannot affect the ability or responsibility to prove that the motor product meets the requirements of users and applicable laws and regulations. The test methods specified in this standard are commonly used; users of the standard are allowed to choose and use them. This standard specifies the basic requirements for motors. When there are special requirements, especially for electronic drives, the manufacturer shall formulate special technical conditions. This standard shall be used together with the general technical conditions or special technical conditions for motors. This standard is applicable to various control motors and their combinations; general- purpose motors can also be adopted by reference.2 Normative referencesThe provisions in following documents become the provisions of this Standard through reference in this Standard. For the dated references, the subsequent amendments (excluding corrections) or revisions do not apply to this Standard; however, parties who reach an agreement based on this Standard are encouraged to study if the latest versions of these documents are applicable. For undated references, the latest edition of the referenced document applies. GB 755 Rotating electrical machines - Rating and performance (idt IEC 60034- 1.1996) GB/T 2423.1 Environmental testing for electric and electronic products - Part 2.Test methods - Tests A. Cold (idt IEC 60068-2-1.1990) GB/T 2423.2 Environmental testing for electric and electronic products - Part 2.Test methods - Tests B. Dry heat (idt IEC 60068-2-2.1974) GB/T 2423.3 Environmental testing - Part 2.Testing method - Test Cab. Damp heat, steady state (eqv IEC 68-2-3.1984) GB/T 2423.4 Environmental testing for electric and electronic products - Part 2.Test method - Test Db. Damp heat, cyclic (12 h + 12 h cycle) (eqv IEC 68-2-30.1980) GB/T 2423.5 Environmental testing - Part 2.Test methods - Test Ea and guidance. Shock (idt IEC 68-2-27.1987) GB/T 2423.10 Environmental testing - Part 2.Test methods - Test Fc. Vibration (sinusoidal) (idt IEC 68-2-6.1982)3 Terms and definitionsThe terms and definitions as established in GB/T 2900.26, as well as the following terms and definitions, apply to this standard. 3.1 Electrical machine for automatic control system Various motors, motor components, systems used for status monitoring, signal processing or servo drive in automatic control systems. Examples. Synchro, rotary transformer, induction phase shifter, induction synchronizer, shaft angle encoder, tachogenerator, servo motor, stepper motor, torque motor, hysteresis synchronous motor, ultrasonic motor, permanent magnet brushless motor system, etc. 3.2 Organization A group of people or individuals whose responsibilities, authorities, relationships are arranged. Examples. Manufacturers, agents, users, testing agencies, government organizations, etc. 3.3 Manufacturer Individuals or organizations that design, produce or assemble and sell motors. 3.4 Transporter An organization or individual that ships a manufacturer's motors to users. 3.5 Frame size The code used when motors are classified according to their overall dimensions or shaft center height. 3.6 Reliability The ability of a motor to complete specified functions within a specified period of time and under specified operating conditions.4 Categories4.1 Model designation The motor model designation method shall comply with the requirements of GB/T 10405. 4.2 Basic appearance structure and installation type The basic appearance structure and installation type of the motor shall comply with the requirements of GB/T 7346. 4.3 Frame size The frame size of the motor shall meet the following requirements. 4.4 Rated voltage and rated frequency Unless otherwise specified, the rated voltage and rated frequency of the motor shall be selected from Table 1.5 Technical requirements and test methods5.1 Appearance 5.1.1 Technical requirements The surface of the motor shall be free of rust, bumps, scratches, coating peeling; the color shall be correct; the markings shall be clear and unmistakable. 5.2 Nameplate 5.2.1 Technical requirements The motor shall have a nameplate, which shall comply with the nameplate-related requirements in GB/T 7346 and the durability requirements in GB 18211-2000. 5.3 Lead wires or terminals 5.3.1 Technical requirements 5.3.2 Test methods 5.3.2.1 Lead wire Put the lead-out end of the motor's lead wire downward. Apply the force specified in 5.3.1.2 vertically downward on the terminal. When applying force, the conductor core and insulation layer shall be evenly stressed. The force shall be applied in all directions for 5 s ~ 10 s. 5.4 Appearance and installation dimensions 5.4.1 Technical requirements The manufacturer shall stipulate the appearance and installation dimensions of the motor. The appearance and installation dimensions shall comply with the general technical conditions or special technical conditions of the motor. Unless otherwise specified, the manufacturer shall deliver the appearance and installation dimensions drawings when delivering the motor. 5.5 Radial clearance 5.6 Axial clearance 5.6.1 Technical requirements The axial clearance of the motor is related to the axial dimensional matching accuracy of the motor, the elasticity of the axial washer, and the axial force. When required, the manufacturer shall specify the axial clearance and axial force of the motor shaft. The axial clearance shall comply with the general technical conditions or special technical conditions of the motor. 5.7 Shaft extension radial circular runout 5.7.1 Technical requirements The radial circular runout of the shaft extension of the motor is related to the radial matching size of the motor and the machining accuracy of the outer circle of the installation stop. When required, the manufacturer shall specify the radial circular runout of the shaft extension. The radial circular runout of the shaft extension shall comply with the general technical conditions or special technical conditions of the motor. 5.15 Impedance 5.15.1 Technical requirements Impedance is a unique technical parameter of an AC motor. It reflects the matching ability of the motor and its connected electrical equipment. When required, the manufacturer shall specify the motor impedance.6 Inspection rules6.1 Inspection classification 6.2 Appraisal inspection 6.2.1 Timing and conditions of appraisal inspection When required, appraisal inspections shall be conducted in nationally recognized laboratories, in accordance with general technical conditions. Group C inspection shall be carried out when one of the following circumstances occurs. d) When the product manufacturing location changes. 6.2.2 Number of prototypes Six prototypes are randomly selected from the batch of products, four of which are used for appraisal inspection, whilst the other two are kept for later use. 6.2.3 Inspection procedures The appraisal inspection items, basic sequence, prototype number are determined by the general technical conditions of various types of motors, with reference to Table 13. 6.2.4 Evaluation of inspection results 6.2.4.1 Qualified If all items of the prototype used for appraisal inspection meet the requirements, the appraisal inspection will be qualified. 6.2.4.3 Accidental failure When the appraisal department determines that a certain unqualified item of the motor is an isolated accidental failure, it is allowed to take a spare prototype from each submitted prototype to replace the failed prototype, to make up all the items before the failure occurred (including the time of failure). Then continue the test. If any item of another prototype does not meet the requirements, the appraisal inspection will fail. 6.2.5 Appraisal inspection of products of the same type When two or more motor models of a certain type with the same frame size are submitted for appraisal inspection at the same time, four prototypes of each model shall be submitted. All prototypes shall pass the Group A inspection in quality consistency; 6.3 Quality consistency inspection Quality consistency inspection is divided into Group A and Group C inspection. a) Group A inspection is an exit-factory inspection, which is conducted to verify whether motor products meet conventional quality requirements; b) Group C inspection is a periodic inspection. 6.3.1 Group A inspection The Group A inspection items and basic sequence shall be carried out as specified in Table 13. 6.3.2 Group C inspection The items and basic sequence of Group C inspection shall be carried out as specified in Table 13. 6.3.2.1 Inspection timing and cycle In any of the following situations, Group C inspection shall generally be carried out. 6.3.2.2 Inspection rules The items and basic sequence of Group C inspection shall be carried out in accordance with Table 13.7 Preparation for delivery7.1 General provisions Unless otherwise specified, the delivered motor shall be a product manufactured after design validation and passed Group A inspection. 7.2 Packaging Motor packaging shall comply with the requirements of JB/T 8162-1999. Manufacturers shall ensure that the motor can be effectively protected through packaging. 7.3 Transportation 7.5 Warranty period The warranty period is the manufacturer's commitment to the user, regarding the correct storage and usage period of the motor.8 User servicesThe manufacturer shall stipulate technical services after the motor is delivered. It shall be able to provide technical services in a timely manner, when users have needs. ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of English version of GB/T 7345-2008 be delivered?Answer: The full copy PDF of English version of GB/T 7345-2008 can be downloaded in 9 seconds, and it will also be emailed to you in 9 seconds (double mechanisms to ensure the delivery reliably), with PDF-invoice.Question 2: Can I share the purchased PDF of GB/T 7345-2008_English with my colleagues?Answer: Yes. The purchased PDF of GB/T 7345-2008_English will be deemed to be sold to your employer/organization who actually paid 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+ countriesQuestion 4: Do you accept my currency other than USD?Answer: Yes. www.ChineseStandard.us -- GB/T 7345-2008 -- Click this link and select your country/currency to pay, the exact amount in your currency will be printed on the invoice. Full PDF will also be downloaded/emailed in 9 seconds.Question 5: Should I purchase the latest version GB/T 7345-2008?Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 7345-2008 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.How to buy and download a true PDF of English version of GB/T 7345-2008?A step-by-step guide to download PDF of GB/T 7345-2008_EnglishStep 1: Visit website https://www.ChineseStandard.net (Pay in USD), or https://www.ChineseStandard.us (Pay in any currencies such as Euro, KRW, JPY, AUD).Step 2: Search keyword "GB/T 7345-2008". Step 3: Click "Add to Cart". If multiple PDFs are required, repeat steps 2 and 3 to add up to 12 PDFs to cart. Step 4: Select payment option (Via payment agents Stripe or PayPal). Step 5: Customize Tax Invoice -- Fill up your email etc. Step 6: Click "Checkout". Step 7: Make payment by credit card, PayPal, Google Pay etc. After the payment is completed and in 9 seconds, you will receive 2 emails attached with the purchased PDFs and PDF-invoice, respectively. Step 8: Optional -- Go to download PDF. Step 9: Optional -- Click Open/Download PDF to download PDFs and invoice. See screenshots for above steps: Steps 1~3 Steps 4~6 Step 7 Step 8 Step 9 |
