1、BRITISH STANDARD BS IEC 60092-302: 1997 Electrical installation in ships Part 302: Low-voltage switchgear and controlgear assemblies ICS 47.020.60 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBS IEC 60092-302:1997 This British Standard, having been prepared under the directi
2、on of the Electrotechnical Sector Policy and Strategy Committee, was published under the authority of the Standards Policy and Strategy Committee on 6 February 2002 BSI 6 February 2002 ISBN 0 580 38943 X National foreword This British Standard reproduces verbatim IEC 60092-302:1997 and implements it
3、 as the UK national standard. The UK participation in its preparation was entrusted to Technical Committee JPEL/18, Electrical installations of ships and mobile and fixed offshore units, which has the responsibility to: A list of organizations represented on this committee can be obtained on request
4、 to its secretary. From 1 January 1997, all IEC publications have the number 60000 added to the old number. For instance, IEC 27-1 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 sy
5、stems. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standard
6、s Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to
7、understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document com
8、prises a front cover, an inside front cover, the IEC title page, pages 2 to 24, an inside back cover and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date Comments60092-302 IEC: 1997 2 CONTEN
9、TS Page FOREWORD. 3 INTRODUCTION . 4 Clause 1 General 5 1.1 Scope . 5 1.2 Normative references . 5 2 Definitions 6 2.1 General. 6 5 Information to be given regarding the ASSEMBLY 6 5.1 Nameplates. 6 5.2 Markings. 7 5.3 Instructions for installation, operation and maintenance . 7 6 Service conditions
10、 7 6.101 Environmental conditions. 7 7 Design and construction . 7 7.1 Mechanical design. 7 7.4 Protection against electric shock . 9 7.5 Short-circuit protection and short-circuit withstand strength 9 7.6 Switching devices and components installed in ASSEMBLIES . 9 7.7 Internal separation of ASSEMB
11、LIES by barriers or partitions . 11 7.8 Electrical connections inside an ASSEMBLY: bars and insulated conductors. 11 8 Test specifications 13 8.3 Routine tests. 13 Tables 101 Clearances and creepage distances for non type-tested ASSEMBLIES . 8 102 Correspondence between the nominal voltage of the su
12、pply system and test voltage for type-tested ASSEMBLIES at sea level 15 103 Routine tests to be performed on TTA, PTTA and NTTA . 16 Annex AA Index 17 BSIEC60092302:1997 6February2002 260092-302 IEC: 1997 3 INTERNATIONAL ELECTROECHNICAL COMMISSION _ ELECTRICAL INSTALLATIONS IN SHIPS Part 302: Low-vo
13、ltage switchgear and controlgear assemblies FOREWORD 1) The 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
14、 all questions concerning standardization in the electrical 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 p
15、articipate in this preparatory work. International, governmental 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 agree
16、ment between the two organizations. 2) The formal decisions 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 d
17、ocuments produced have the form of recommendations for international use and are published in the form of standards, 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 appl
18、y IEC International Standards transparently 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 indic
19、ate its approval and cannot be 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. IEC shall not be held responsible for i
20、dentifying any or all such patent rights. International Standard IEC 60092-302 has been prepared by IEC technical committee 18: Electrical installations of ships and of mobile and fixed offshore units. This fourth edition cancels and replaces the third edition published in 1980, amendment 1 (1989) a
21、nd amendment 2 (1994). This International Standard shall be read in conjunction with IEC 60439-1. The clause numbers of this part of IEC 60092 correspond to those of IEC 60439-1. When this standard specifies “addition” or “replacement”, the corresponding text of IEC 60439-1 shall be adapted in conse
22、quence. The absence of text in this part of IEC 60092 indicates that the appropriate clauses of IEC 60439-1 apply. Subclauses, figures and tables which are additional to those of IEC 60439-1 are numbered starting from 101. Additional annexes are lettered AA, BB, etc. The text of this standard is bas
23、ed on the following documents: FDIS Report on voting 18/798/FDIS 18/817/RVD Full information on the voting for the approval of this standard can be found in the report on voting indicated in the above table. Annex AA is for information only. BSIEC60092302:1997 6February2002 360092-302 IEC: 1997 4 IN
24、TRODUCTION IEC 60092 forms a series of International Standards for electrical installations in sea-going ships, incorporating good practice and coordinating, as far as possible, existing rules. These standards form a code of practical interpretation and amplification of the requirements of the Inter
25、national Convention for the 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. BSIEC60092302:1997 6February2002 460092-302 IEC: 1997 5 ELECTRICAL INSTALLATIONS IN SHIPS Part 302: L
26、ow-voltage switchgear and controlgear assemblies 1 General 1.1 Scope Replacement This part of IEC 60092 is applicable to low-voltage switchgear and controlgear assemblies type-tested assemblies (TTA), partially type-tested assemblies (PTTA) and non type-tested assemblies (NTTA), with rated voltages
27、not exceeding 1 000 V a.c. at rated frequencies not exceeding 60 Hz or 1 500 V d.c. for use in ships as a supplement to IEC 60439-1. NOTE Throughout this standard, the word ASSEMBLY is used for a low-voltage switchgear and controlgear assembly. This standard also applies to ASSEMBLIES incorporating
28、control and/or power equipment, which operate at higher frequencies. In this case, appropriate additional requirements apply. Unless otherwise specified in the following clauses, all ASSEMBLIES and their components comply with IEC 60439-1. In case of doubt, IEC 60092 publications shall have preferen
29、ce over IEC 60439-1. 1.2 Normative references Addition IEC 60092-101: 1994, Electrical installations in ships Part 101: Definitions and general requirements IEC 60092-202: 1994, Electrical installations in ships Part 202: System design Protection IEC 60092-504: 1994, Electrical installations in ship
30、s Part 504: Special features Control and instrumentation IEC 60185: 1987, Current transformers IEC 60363: 1972, Short-circuit current evaluation with special regard to rated short-circuit capacity of circuit-breakers in installations in ships IEC 60865-1: 1993, Short-circuit currents Calculation of
31、effects Part 1: Definitions and calculation methods BSIEC60092302:1997 6February2002 560092-302 IEC: 1997 6 2 Definitions 2.1 General Addition For the purpose of this part of IEC 60092, the general terms given in IEC 60050(441) and IEC 60439-1, as well as the following definitions apply. 2.1.1 low-v
32、oltage switchgear and controlgear assembly (ASSEMBLY): A combination of one or more low-voltage switching devices together with associated control, measuring, signalling, protective, regulating equipment, etc., completely assembled under the responsibility of the manufacturer with all the internal e
33、lectrical and mechanical interconnections and structural parts. 2.1.1.1 type-tested low-voltage switchgear and controlgear assembly (TTA): A low- voltage switchgear and controlgear assembly conforming to an established type or system without deviations likely to significantly influence the performan
34、ce from the typical ASSEMBLY verified to be in accordance with this standard. 2.1.1.2 partially type-tested low-voltage switchgear and controlgear assembly (PTTA): A low-voltage switchgear and controlgear assembly, containing both type-tested and non type- tested arrangements provided that the latte
35、r are derived (e.g. by calculation) from type-tested arrangements which have complied with the relevant tests. 2.1.1.101 non type-tested low-voltage switchgear and controlgear assembly (NTTA): A low-voltage switchgear and controlgear assembly, which does not belong to 2.1.1.1 or 2.1.1.2. 2.1.101 mai
36、n switchboard: A switchgear and controlgear assembly which is directly supplied by the main source of electrical power and is intended to distribute and control electrical energy to the ships services. 2.1.102 emergency switchboard: A switchgear and controlgear assembly which is normally supplied by
37、 the main switchboard but in the event of failure of the main electrical power supply system is directly supplied by the emergency source of electrical power or the transitional source of emergency power and is intended to distribute and control electrical energy to the emergency services. 2.1.103 s
38、ection board: A switchgear and controlgear assembly for controlling and distributing the supply of electrical power to other section boards, distribution boards or final sub-circuits. 2.1.104 distribution board: A switchgear and controlgear assembly for the control and distribution of electrical pow
39、er to final sub-circuits. 5 Information to be given regarding the ASSEMBLY In addition to the information required by clause 5 of IEC 60439-1 the following subclauses shall apply: 5.1 Nameplates Replacement c) IEC 60092-302. BSIEC60092302:1997 6February2002 660092-302 IEC: 1997 7 5.2 Markings 5.2.10
40、1 Circuits Individual circuits and their devices shall have durable and permanent markings. The rating of fuses and setting of protective devices shall be indicated. When, for fuses above 500 V, the fuseholders permit the insertion of fuses for lower nominal voltage, special warning labels or symbol
41、s shall be provided, for example “Caution 690 V fuses only“. 5.2.102 Markings of voltage All ASSEMBLIES shall be marked with the rated operational voltage. 5.2.103 Markings of parts Withdrawable and removable parts of an ASSEMBLY shall have markings to identify where the parts can be placed in the A
42、SSEMBLY. 5.3 Instructions for installation, operation and maintenance Addition Where polarized circuit-breakers are installed in d.c. systems and in all other similar cases warning labels shall be arranged so as to guard against the possibility of incorrect connections during maintenance or replacem
43、ent. 6 Service conditions 6.101 Environmental conditions The normal environmental conditions shall be as stated in 2.6 of IEC 60092-101 and in 3.2 of IEC 60092-504. Other environmental conditions shall be agreed between the manufacturer and the user if required, e.g. for use in arctic or tropical cl
44、imate. The conditions specified in the above-mentioned IEC 60092 publications shall have preference over values given in 6.1 to 6.3.1 of IEC 60439-1. 7 Design and construction 7.1 Mechanical design 7.1.2 Clearances, creepage distances and isolating distances 7.1.2.1 Clearances and creepage distances
45、 Addition Clearance and creepage distances shall be in accordance with 7.1.2.101 for type-tested and partially type-tested ASSEMBLIES. For non type-tested ASSEMBLIES, clearance and creepage distances shall be in accordance with table 101. The clearances and creepage distances between busbars and/or
46、connectors other than cables in ASSEMBLIES shall not be permanently reduced below the values specified in 7.1.2.101 or 7.1.2.102 due to abnormal conditions (e.g. short circuits). BSIEC60092302:1997 6February2002 760092-302 IEC: 1997 8 7.1.2.101 Type-tested and partially type-tested ASSEMBLIES For th
47、ese ASSEMBLIES the following requirements for the clearances and creepage distances of busbars shall apply (see tables 14, 16 and clause G.1 of IEC 60439-1): pollution degree 3 (conductive pollution occurs, or dry non-conductive pollution occurs which becomes conductive due to condensation which is
48、expected); overvoltage category III (distribution circuit level); inhomogeneous field conditions (case A); rated operational voltage 1 000 V a.c., 1 500 V d.c; group of insulating material IIIa. As a result of these requirements, the values are: minimum clearance: 8 mm; minimum creepage distance: 16
49、 mm. If a pollution degree higher than 3 is applicable because of the location of the ASSEMBLY, e.g. in diesel-engine rooms, the requirements are as stated in 7.1.2.102. NOTE The above-mentioned clearance and creepage distance are the minimum values. 7.1.2.102 Non type-tested ASSEMBLIES For these ASSEMBLIES the requirements for the clearances and creepage distances shall be as stated in table 101. The values in table 101 apply to clearances a
