GB/T 7357-2025 English PDFUS$374.00 · In stock
Delivery: <= 4 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 7357-2025: Electrical installations in ships - System design - Protection Status: Valid GB/T 7357: Historical versions
Basic dataStandard ID: GB/T 7357-2025 (GB/T7357-2025)Description (Translated English): Electrical installations in ships - System design - Protection Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: U60 Classification of International Standard: 47.020.60 Word Count Estimation: 18,125 Date of Issue: 2025-04-25 Date of Implementation: 2025-11-01 Older Standard (superseded by this standard): GB/T 7357-2010 Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration GB/T 7357-2025: Electrical installations in ships - System design - Protection---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.Electrical installations in ships - System design - Protection System design and protection of marine electrical equipment (IEC 60092﹘202.2016, Electrical installations in ships- Part 202.System design-Protection, IDT) ICS 47.020.60 CCS U 60 National Standard of the People's Republic of China Replace GB/T 7357-2010 Released on 2025-04-25 2025-11-01 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 ... 1 4 General requirements ... 3 4.1 General Principles 3 4.2 Basic Protection ... 3 4.3 Analysis and calculation 3 5 Power load analysis ... 3 6 Short-circuit current calculation ... 4 7 Selective protection analysis ... 4 7.1 General Principles ... 4 7.2 Current Selectivity ... 4 7.3 Time Current Selectivity ... 4 7.4 Alternative protection schemes 4 8 Characteristics and selection of short-circuit protection devices ... 5 8.1 General Principles 5 8.2 Protective devices ... 5 8.3 Rated short-circuit breaking capacity ... 5 8.4 Rated short-circuit making capacity ... 5 8.5 Coordination of Selective Protective Devices 6 9 Selection of overload protection device ... 6 9.1 Mechanical switch device 6 9.2 Overload protection fuse 6 9.3 Stationary or solid-state switching devices 6 10 Select protective electrical appliances according to usage requirements ... 6 10.1 General Principles 6 10.2 Generator Protection 7 10.3 Protection of Important Electrical Equipment 7 10.4 Transformer Protection 7 10.5 Circuit Protection 7 10.6 Motor Protection 8 10.7 Battery Protection 8 10.8 Protection of instruments, indicator lights and control circuits 8 10.9 Protection of stationary or solid-state equipment 8 11 Reverse power protection of AC generator ... 8 12 Undervoltage protection ... 9 12.1 AC and DC generators 9 12.2 AC and DC Motors 9 13 Overvoltage protection ... 9 13.1 General Principles 9 13.2 Transformer ... 9 13.3 AC Equipment ... 9 14 Under-frequency and over-frequency protection ... 9 References ... 10ForewordThis 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 is required. This document replaces GB/T 7357-2010 "System design protection for marine electrical equipment". Compared with GB/T 7357-2010, In addition to structural adjustments and editorial changes, the main technical changes are as follows. Added the definitions of "basic protection" and "power load analysis" (see 3.11 and 3.12); a) Added provisions for power system analysis and calculation (see 4.3); b) Added provisions for power load analysis (see Chapter 5); c) The provisions on short-circuit current have been changed and the provisions on short-circuit current calculation have been added (see Chapter 6, Chapter 5 of the.2010 edition); d) Added provisions for selective protection analysis (see Chapter 7); e) Deleted the relevant provisions on protection of lighting circuits and shore power connections (see 8.7 and 8.8 of the.2010 edition); f) Added provisions for under-frequency and over-frequency protection (see Chapter 14). g) This document is equivalent to IEC 60092﹘202.2016 "Marine electrical equipment Part 202.System design protection". The following minimal editorial changes were made to this document. The name of the standard is changed to "System Design Protection of Marine Electrical Equipment". - 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 is proposed and coordinated by the National Technical Committee for Standardization of Ship Electrical and Electronic Equipment (SAC/TC 531). This document was drafted by. Shanghai Ship Research and Design Institute, 704th Institute of China Shipbuilding Industry Corporation. The main drafters of this document are. Lu Yiqing, Dong Zhiqiang, Yang Jing, Zhang Qixin, Qiao Zhiqiang, Tian Xin, Li Jianbin, Zhang Lin, Lu Pengfei, Lai Changwei. The previous versions of this document and the documents it replaces are as follows. First published in 1987 as GB/T 7357-1987, first revised in.1998, and second revised in.2010; - This is the third revision. - System design and protection of marine electrical equipment1 ScopeThis document applies to the main characteristic requirements of electrical protection systems for ship electrical equipment.2 Normative referencesThe contents of the following documents constitute the 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. in this document. GB/T 14048.2-2020 Low-voltage switchgear and controlgear Part 2.Circuit breakers (IEC 60947﹘2.2019, MOD) Note. There is no technical difference between the contents cited in GB/T 14048.2-2020 and those cited in IEC 60947﹘2.2019. IEC 60909 (all parts) Short-circuit current calculation in three-phase AC systems three-phase ac systems） Note. GB/T 15544 (all parts) Calculation of short-circuit current in three-phase AC systems [IEC 60909 (all parts)] IEC 60909﹘0 Short-circuit current calculation for three-phase AC systems Part 0.Current calculation tion in three﹘phase acsystems-Part 0.Calculation of currents) Note. GB/T 15544.1-2023 Short-circuit current calculation for three-phase AC systems Part 1.Current calculation (IEC 60909﹘0.2016, MOD) IEC TR 60909﹘1 Short-circuit current calculations for three-phase AC systems Part 1.Coefficients for application in short-circuit current calculations cuit current calculation in three﹘phase acsystems-Part 1：Factors for the calculation of short﹘circuit currents Note. GB/T 15544.2-2017 Calculation of short-circuit current in three-phase AC systems Part 2.Coefficients for application of short-circuit current calculations (IEC TR 60909﹘1.2002, IDT IEC 61140 Protection against electric shock - Common parts for devices and equipment pects for installations and equipment) Note. GB/T 17045-2020 Common parts of electric shock protection devices and equipment (IEC 61140.2016, IDT) IEC 61363﹘1 Electrical installations on ships and mobile and fixed offshore installations Part 1.Calculation method for three-phase AC short-circuit current Method (Electrical installations of ships and mobile and fixed offshore units-Part 1.Procedures for calcu﹘ lating short﹘circuit currents in three phase ac） Note. GB/T 21066-2007 Calculation method for three-phase AC short-circuit current of electrical installations on ships and mobile and fixed offshore installations (IEC 61363﹘1.1998, IDT) IEC 61660﹘1 Short-circuit current in DC auxiliary facilities of power plants and substations Part 1.Calculation of short-circuit current cuit currents in dcauxiliary installations in power plants and substations-Part 1.Calculation of short﹘circuit currents） IEC 62271﹘100 High-voltage switchgear and controlgear Part 100.AC circuit breakers and controlgear-Part 100.Alternating﹘current circuit﹘breakers）3 Terms and definitionsThe following terms and definitions apply to this document. ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 7357-2025_English be delivered?Answer: Upon your order, we will start to translate GB/T 7357-2025_English as soon as possible, and keep you informed of the progress. The lead time is typically 2 ~ 4 working days. 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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 7357-2025?Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 7357-2025 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. |
