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GB/T 12975-2021 English PDF

Q: How long will the true-PDF of English version of GB/T 12975-2021 be delivered?

Upon your order, we will start to translate GB/T 12975-2021_English as soon as possible, and keep you informed of the progress. The lead time is typically 4 ~ 6 working days. The lengthier the document the longer the lead time.

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Q: Should I purchase the latest version GB/T 12975-2021?

Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 12975-2021 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.

US$629.00 · In stock
Delivery: <= 6 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 12975-2021: General specification for synchronous generator in ships
Status: Valid

GB/T 12975: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 12975-2021	629	Add to Cart	6 days	General specification for synchronous generator in ships	Valid
GB/T 12975-2008	RFQ	ASK	5 days	General specification for synchronous generator in ship	Obsolete
GB/T 12975-1991	759	Add to Cart	5 days	General specification for synchronous generator in ship	Obsolete

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GB/T 43767.2 GB/T 43767.1

Basic data

Standard ID: GB/T 12975-2021 (GB/T12975-2021)
Description (Translated English): General specification for synchronous generator in ships
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: U61
Word Count Estimation: 34,328
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 12975-2021: General specification for synchronous generator in ships

---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.
General specification for synchronous generator in ships ICS 47.020.60 U61 National Standards of People's Republic of China Replace GB/T 12975-2008 General technical requirements for marine synchronous generators Released on 2021-03-09 2021-10-01 implementation State Administration of Market Supervision and Administration Issued by the National Standardization Management Committee

Foreword Ⅰ 1 Scope 1 2 Normative references 1 3 Terms and definitions 2 4 Requirements 3 5 Test method 20 6 Inspection rules 25 7 Product mark 28 8 Packaging, transportation and storage 29 9 Warranty period 30

Foreword

This standard is in accordance with GB/T 1.1-2009 The rules given are drafted. This standard replaces GB/T 12975-2008 "General Technical Requirements for Marine Synchronous Generators". With GB/T Compared with 12975-2008, except The main technical changes besides editorial changes are as follows. ---Modified the content of the outlet location requirements (see 4.4.13, 4.4.13 in the.2008 edition); ---Modified the content of voltage regulation rate, waveform distortion and temperature rise requirements (see 4.5.3, 4.5.4, 4.5.5 and 4.5.15.1,.2008 Version 4.5.3, 4.5.4, 4.5.5 and 4.5.15.1); ---Modified the requirements of insulation resistance and inter-turn impulse withstand voltage (see 4.5.16, 4.5.18, 4.5.16, 4.5. 18); ---Added the requirements and test methods for impulse withstand voltage to ground (see 4.5.19, 5.18); ---Modified the requirements for moisture resistance and salt spray resistance (see 4.5.23, 4.5.24, 4.5.22, 4.5.24 in the.2008 edition); --- Deleted the anti-mold performance and related test requirements (see the.2008 version of 4.5.23, 5.21); ---Modified the content of vibration intensity limit and vibration resistance requirements (see 4.5.27 and 4.5.30, 4.5.27 and 4.5.30); ---Modified the test frequency range of radiated emission from the shell port of the automatic voltage regulator (see 4.5.29.2,.2008 edition 4.5.29.2); ---The concentration of sulfur dioxide in the chemical gas corrosion test has been increased (see 5.23). This standard was proposed and managed by the China Electrical Equipment Industry Association. The organization responsible for drafting this standard. Shanghai Institute of Electrical Apparatus, Shanghai Institute of Electrical Apparatus (Group) Co., Ltd., China Classification Society Maritime Code Research Institute, China Classification Society Shanghai Branch, Lanzhou Electric Co., Ltd., Shanghai Marathon·Gexin Electric Co., Ltd., Jiangxi Qing Huatai Hao Sanbo Motor Co., Ltd., Kangfu Technology Co., Ltd. The main drafters of this standard. Lu Shouxiang, Su Yingbin, Han Sufang, Sun Wu, Li Chenhao, Gao Xiaohui, Zhou Weiqiang, Rao Zhifang, Wan Yong. The previous versions of the standards replaced by this standard are as follows. ---GB/T 12975-1991, GB/T 12975-2008. General technical requirements for marine synchronous generators

1 Scope

This standard specifies the rated power3 kVA(50 Hz and 60 Hz) and below marine synchronous generators (hereinafter referred to as generators) and The technical requirements, test methods, inspection rules, classification, marking and packaging of the excitation device. This standard applies to generators and their excitation devices that are driven by internal combustion engines and used as ships and mobile and fixed offshore power stations. This standard covers generators driven by steam turbines, shaft generators and rated power greater than 3 kVA generator, also refer to use.

2 Normative references

The following documents are indispensable for the application of this document. For dated reference documents, only the dated version applies to this article Pieces. For undated reference documents, the latest version (including all amendments) is applicable to this document. GB/T 191-2008 Packaging, storage and transportation pictorial signs GB/T 755-2019 Rotating motor rating and performance GB/T 997-2008 Classification of structure type, installation type and junction box position of rotating electric machine (IM code) GB/T 1029-2005 Three-phase synchronous motor test method GB/T 1958-2017 Product Geometric Technical Specification (GPS) Geometric Tolerance Testing and Verification GB/T 1971-2006 Rotating motor terminal mark and direction of rotation GB/T 1993-1993 Rotating electric machine cooling method GB/T 2423.4-2008 Environmental testing of electrical and electronic products Part 2.Test method Test Db. Alternating damp heat (12 h loop) GB/T 2423.17-2008 Environmental testing of electric and electronic products Part 2.Test method Test Ka. Salt spray GB/T 2423.33-2005 Environmental testing of electric and electronic products Part 2.Test method Test Kca. High concentration dioxide Sulfur test GB/T 2900.25 Electrotechnical terminology rotating electric machine GB/T 4772.1-1999 Rotating electrical machinery dimensions and output power levels Part 1.Frame size 56~400 and flange number 55~1080 GB/T 4772.2-1999 Rotating electrical machinery size and output power level Part 2.Frame size 355~1000 and flange number 1180~2360 GB/T 4831-2016 Rotating electric machine product model compilation method GB/T 4942.1-2006 Degree of protection of the overall structure of rotating electrical machines (IP code) Classification GB/T 6113.101-2016 Radio disturbance and immunity measurement equipment and measurement method specification Part 1-1.Radio disturbance Interference and immunity measuring equipment measuring equipment GB/T 6113.102-2018 Specification for Radio Disturbance and Immunity Measurement Equipment and Measurement Methods Part 1-2.Radio Disturbance Coupling device for conducting disturbance measurement of disturbance and immunity measuring equipment GB/T 6113.103-2008 Radio disturbance and immunity measurement equipment and measurement method specification Part 1-3.Radio disturbance Disturbance and immunity measurement equipment auxiliary equipment disturbance power ......

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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of GB/T 12975-2021_English be delivered?

Answer: Upon your order, we will start to translate GB/T 12975-2021_English as soon as possible, and keep you informed of the progress. The lead time is typically 4 ~ 6 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of GB/T 12975-2021_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 12975-2021_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.

Question 5: Should I purchase the latest version GB/T 12975-2021?

Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 12975-2021 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.