1、BRITISH STANDARD BS IEC 60092-303: 1980 Electrical installations in ships Part 303: Equipment Transformers for power and lighting ICS 47.020.60 BS IEC 60092-303:1980 This British Standard, having been prepared under the direction of the Electrotechnical Sector Policy and Strategy Committee, was publ
2、ished under the authority of the Standards Policy and Strategy Committee on 3 October 2002 BSI 3 October 2002 ISBN 0 580 40428 5 National foreword This British Standard reproduces verbatim IEC 60092-303:1980, including amendment 1:1997 and implements it as the UK national standard. The start and fin
3、ish of text introduced or altered by amendment is indicated in the text by tags . Tags indicating changes to IEC text carry the number of the IEC amendment. For example, text altered by IEC amendment 1 is indicated by . The UK participation in its preparation was entrusted to Technical Committee JPE
4、L/18, Electrical installations of ships and of mobile and fixed offshore units, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. From 1 January 1997, all IEC publications have the number 60000 added to the old number.
5、 For instance, IEC 27 has been renumbered as IEC 60027-1. For a period of time during the change over from one numbering system to the other, publications may contain identifiers from both systems. Cross-references The British Standards which implement international publications referred to in this
6、document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contr
7、act. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals fo
8、r change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the IEC title page, pages 2 to 8, an inside back cover and a back cover. The BSI copyrig
9、ht date displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date CommentsBSIEC60092303:1980 1 -29006303 IE0891:CA+:17991 CONTENTS FOREWORD.3 INTRODUCTION.6 1 Scope.7 2 General requirements.7 3 Winding arrangement .7 4 Terminals .7 5 Co
10、oling arrangements 8 6 Voltage regulation 8 7 Parallel operation .8 8 Temperature-rise limits.8 9 Tests8 BSIEC60092303:19802-29006I 303E0891:CA+7991:1 2 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ ELECTRICAL INSTALLATIONS IN SHIPS Part 303: Equipment Transformers for power and lighting FOREWORD 1) T
11、he IEC (International Electrotechnical Commission) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees). The object of the IEC is to promote international co-operation on all questions concerning standardization in the electric
12、al and electronic fields. To this end and in addition to other activities, the IEC publishes International Standards. Their preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with may participate in this preparatory work. International, gover
13、nmental and non-governmental organizations liaising with the IEC also participate in this preparation. The IEC collaborates closely with the International Organization for Standardization (ISO) in accordance with conditions determined by agreement between the two organizations. 2) The formal decisio
14、ns or agreements of the IEC on technical matters express, as nearly as possible, an international consensus of opinion on the relevant subjects since each technical committee has representation from all interested National Committees. 3) The documents produced have the form of recommendations for in
15、ternational use and are published in the form of standards, technical specifications, technical reports or guides and they are accepted by the National Committees in that sense. 4) In order to promote international unification, IEC National Committees undertake to apply IEC International Standards t
16、ransparently to the maximum extent possible in their national and regional standards. Any divergence between the IEC Standard and the corresponding national or regional standard shall be clearly indicated in the latter. 5) The IEC provides no marking procedure to indicate its approval and cannot be
17、rendered responsible for any equipment declared to be in conformity with one of its standards. 6) Attention is drawn to the possibility that some of the elements of this International Standard may be the subject of patent rights. The IEC shall not be held responsible for identifying any or all such
18、patent rights. International Standard IEC 60092-303 has been prepared by IEC technical committee 18: Electrical installations of ships. This third edition cancels and replaces the second edition published in 1964 and its amendment 1 (1997) and constitutes a technical revision. This consolidated vers
19、ion of IEC 60092-303 is based on the third edition (1980) document 18(CO)471 and its amendment 1 (1997) documents 18/823/FDIS and 18/828/RVD. It bears the edition number 3.1. A vertical line in the margin shows where the base publication has been modified by amendment 1. The committee has decided th
20、at the contents of the base publication and its amendment will remain unchanged until 2005. At this date, the publication will be reconfirmed; withdrawn; replaced by a revised edition, or amended. BSIEC60092303:19803 3 -29006303 IE0891:CA+:17991 The series consists of the following publications: IEC
21、 60092-101: Electrical installations in ships Part 101: Definitions and general requirements IEC 60092-201: Part 201: System design General IEC 60092-202: Part 202: System design Protection IEC 60092-301: Part 301: Equipment Generators and motors IEC 60092-302: Part 302: Equipment Switchgear and con
22、trolgear assemblies IEC 60092-303: Part 303: Equipment Transformers for power and lighting IEC 60092-304: Part 304: Equipment Semiconductor convertors IEC 60092-305: Part 305: Equipment Accumulator (storage) batteries IEC 60092-306: Part 306: Equipment Luminaires and accessories IEC 60092-307: Part
23、307: Equipment Heating and cooking appliances IEC 60092-352: Part 352: Choice and installation of cables for low-voltage power systems IEC 60092-373: Part 373: Shipboard telecommunication cables and radio-frequency cables Shipboard flexible coaxial cables IEC 60092-374: Part 374: Shipboard telecommu
24、nication cables and radio-frequency cables Telephone cables for non-essential communication services IEC 60092-375: Part 375: Shipboard telecommunication cables and radio-frequency cables General instrumentation, control and communication cables IEC 60092-401: Part 401: Installation and test of comp
25、leted installation IEC 60092-501: Part 501: Special features Electric propulsion plant IEC 60092-502: Part 502: Special features Tankers IEC 60092-503: Part 503: Special features A.C. supply systems with voltages in the range above 1 kV up to and including 11 kV IEC 60092-504: Part 504: Special feat
26、ures Control and instrumentation IEC 60092-504A: First supplement to IEC 60092-504 (1974): Special features Control and instrumentation Appendices: Specific control and instrumentation installations IEC 60092-505: Part 505: Special features Mobile offshore drilling units BSIEC60092303:19804-29006I 3
27、03E0891:CA+7991:1 4 Other IEC publications quoted in this standard: IEC 60076: Power transformers IEC 60076-1:1976, Part 1: General IEC 60076-2:1976, Part 2: Temperature rise Text deleted IEC 60076-5:1976, Part 5: Ability to withstand short circuit IEC 60092-101: Definitions and general requirements
28、 IEC 60092-401: Installation and test of complete installation IEC 60119:1960, Recommendations for polycrystalline semiconductor rectifier stacks and equipment IEC 60146: Semiconductor converters Text deleted BSIEC60092303:19805 5 -29006303 IE0891:CA+:17991 INTRODUCTION IEC 60092: Electrical install
29、ations in ships, forms a series of international standards for electrical installations in sea-going ships, incorporating good practice and co-ordinating as far as possible existing rules. These standards form a code of practical interpretation and amplification of the requirements of the Internatio
30、nal Convention on Safety of Life at Sea, a guide for future regulations which may be prepared and a statement of practice for use by shipowners, shipbuilders and appropriate organizations. BSIEC60092303:19806-29006I 303E0891:CA+7991:1 6 ELECTRICAL INSTALLATIONS IN SHIPS Part 303: Equipment Transform
31、ers for power and lighting 1 Scope This standard is applicable to all transformers used for power, lighting and static convertors and where appropriate to starting transformers, static balancers, saturable reactors and transductors for use in ships, including single-phase transformers rated at less
32、than 1 kVA, and three-phase transformers rated at less than 5 kVA, unless special requirements are specified. 2 General requirements All equipment referred to in the scope shall comply with the relevant requirements of the publications referred to hereinafter as well as with the additional requireme
33、nts given in this standard and the other parts of IEC 60092 as far as applicable. IEC 60076, Power transformers IEC 60076-1:1993, Power transformers Part 1: General IEC 60076-2:1993, Power transformers Part 2: Temperature rise IEC 60076-3:1980, Power transformers Part 3: Insulation levels and dielec
34、tric tests Amendment No. 1 (1981) IEC 60076-3-1:1987, Power transformers Part 3: Insulation levels and dielectric tests Section 1: External clearances in air IEC 60076-5:1976, Power transformers Part 5: Ability to withstand short circuit Amendment 2 (1994) IEC 60146-1-3:1991, Semiconductor convertor
35、s General requirements and line commutated convertors Part 1-3: Transformers and reactors IEC 60726:1982, Dry-type power transformers Amendment No. 1 (1986) IEC 60947-4-1:1990, Low-voltage switchgear and controlgear Part 4: Contactors and motor- starters Section 1: Electromechanical contactors and m
36、otor-starters 3 Winding arrangement Transformers shall be double-wound (two separate windings). Starting transformers may be of the auto-transformer type. 4 Terminals Suitable terminals, clearly marked, shall be provided in an accessible position, convenient for external connections. The terminals s
37、hall be effectively secured and shall be so spaced and/or shielded that they cannot be accidentally earthed, short-circuited or touched. BSIEC60092303:19807 7 -29006303 IE0891:CA+:17991 5 Cooling arrangements 5.1 Transformers shall preferably be of the dry, air-cooled type. 5.2 Transformers of the l
38、iquid-immersed type shall preferably be hermetically sealed. If of the conservator type, they shall be so designed that under all conditions with the ship inclined from the normal as specified in IEC 60092-101, they operate without risk of spilling liquid. If provision is made for breathing, a suita
39、ble dehydrator shall be provided. 5.3 For liquid-immersed type transformers, consideration shall be given to provide liquid over-temperature alarm and gas-actuated protection devices. NOTE See clause 15 of IEC 60092-401, regarding installation precautions. 6 Voltage regulation * The voltage drop in
40、the secondary voltage between no load and rated load, under resistive load, shall not exceed 5 % for transformers rated up to 5 kVA per phase and 2,5 % for transformers rated at more than 5 kVA per phase, except that for starting transformers the voltage shall be subject to agreement between manufac
41、turer and purchaser. NOTE When determining the transformer ratio and the short-circuit impedance, consideration shall be given to total voltage drop to be expected in the supply and distribution system. In this respect reference is also made to clause 11 of IEC 60092-101. 7 Parallel operation When t
42、ransformers are so arranged that their secondary windings may be connected in parallel, their winding connections shall be compatible, their rated voltage ratios shall be equal (with tolerances allowed) and their short-circuit impedance values, expressed in percentage, shall have a ratio within 0,9
43、to 1,1. When transformers are intended for operation in parallel, the rated power of the smallest transformer in the group shall be not less than half of the rated power of the largest transformer in the group. 8 Temperature-rise limits Temperature-rise limits for oil-immersed transformers shall be
44、defined in accordance with clause 4 of IEC 60076-2 and for dry-type transformers in accordance with clause 10 of IEC 60726 taking into consideration the ambient temperatures referred to in 2.6 of IEC 60092-101. 9 Tests If a short-circuit test is required to prove the short-circuit ability of a trans
45、former, it shall be a type test and shall be in compliance with 2.2.5 of IEC 60076-5. _ _ *This clause contains requirements that have to be agreed between manufacturer and purchaser. BSIEC60092303:19808BS IEC 60092-303: 1980 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution
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