往复内燃机驱动的交流发电机组 — 第3部分：发电机组用交流发电机

5 Rating

The generator rating class shall be specified in accordance with IEC 34-1. In the case of generators for RIC engine driven generating sets, continuous rating (duty type S1) or rating with discrete constant loads (duty type S10) shall be specified.

For the purposes of this part of ISO 8528, the maximum continuous rating based on duty type S1 is called the basic continuous rating (BR). Additionally for duty type S10, there is a peak continuous rating (PR), where the permissible generator temperature rises are increased by a specific amount according to the thermal classification.

In the case of duty type S10, operation at the PR thermally ages the generator insulation systems at an increased rate. Factor T_L for the relative thermal life expectancy of the insulation system is therefore an important integral part of the rating class.

6 Limits of temperature and temperature rise

6.1 Basic continuous rating

The generator shall be capable of delivering its basic continuous rating (BR) over the whole range of operating conditions (e.g. minimum to maximum coolant temperatures) with total temperatures not exceeding 40 °C plus the temperature rises specified in IEC 34-1:1983, table I (see note 3).

6.2 Peak continuous rating

At the generator peak continuous rating (PR), the total temperatures may be increased by the following allowances (see notes 3 and 4):

For ambient temperatures below 10 °C, the limit of the total temperature shall be reduced by 1 °C for each degree Celsius by which the ambient temperature is below 10 °C.

NOTES

3 The RIC engine output may vary with changes of ambient air temperature; the generator total temperature in operation will depend upon its primary coolant temperature, which is not necessarily related to the RIC engine inlet air temperature.

4 When the generator operates at these higher temperatures, the generator insulation systems will age thermally from two to six times faster (depending on the temperature increase and specific insulation system) than at the generator BR temperature rise values; i.e. operating 1 h at PR temperature rise values is approximately equal to operating 2 h to 6 h at BR temperature rise values. The exact value for the factor T_L is to be given by the manufacturer and marked on the rating plate (see also clause 14).

7 Rated power and speed characteristics

Terms, symbols and definitions for rated power and speed are given in 7.1 to 7.5.

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• Bulletin de la CEI
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Terminologie

En ce qui concerne la terminologie générale, le lecteur se reportera à la Publication 50 de la CEI : Vocabulaire Electrotechnique International (VEI), qui est établie sous forme de chapitres séparés traitant chacun d'un sujet défini, l'Index général étant publié séparément. Des détails complets sur le VEI peuvent être obtenus sur demande.

Les termes et définitions figurant dans la présente publication ont été soit repris du VEI, soit spécifiquement approuvés aux fins de cette publication.

Symboles graphiques et littéraux

Pour les symboles graphiques, symboles littéraux et signes d'usage général approuvés par la CEI, le lecteur consultera :

• la Publication 27 de la CEI : Symboles littéraux à utiliser en électrotechnique ;
• la Publication 617 de la CEI : Symboles graphiques pour schémas.

Les symboles et signes contenus dans la présente publication ont été soit repris des Publications 27 ou 617 de la CEI, soit spécifiquement approuvés aux fins de cette publication.

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Revision of this publication

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Information on the work of revision, the issue of revised editions and amendment sheets may be obtained from IEC National Committees and from the following IEC sources :

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Terminology

For general terminology, readers are referred to IEC Publication 50 : International Electrotechnical Vocabulary (IEV), which is issued in the form of separate chapters each dealing with a specific field, the General Index being published as a separate booklet. Full details of the IEV will be supplied on request.

The terms and definitions contained in the present publication have either been taken from the IEV or have been specifically approved for the purpose of this publication.

Graphical and letter symbols

For graphical symbols, and letter symbols and signs approved by the IEC for general use, readers are referred to :

• IEC Publication 27 : Letter symbols to be used in electrical technology ;
• IEC Publication 617 : Graphical symbols for diagrams.

The symbols and signs contained in the present publication have either been taken from IEC Publications 27 or 617, or have been specifically approved for the purpose of this publication.

IEC publications prepared by the same Technical Committee

The attention of readers is drawn to the inside of the back cover, which lists IEC publications issued by the Technical Committee which has prepared the present publication.

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NORME INTERNATIONALE INTERNATIONAL STANDARD МЕЖДУНАРОДНЫЙ СТАНДАРТ

50(715) © IEC:1996

CONTENTS

:current

Foreword

This document (EN 10216-3:2002) has been prepared by Technical Committee EC/TC 29, "Steel tubes and fittings for steel tubes", the secretariat of which is held by UNI.

This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by November 2002, and conflicting national standards shall be withdrawn at the latest by November 2002.

This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association, and supports essential requirements of EU Directive(s).

For relationship with EU Directive(s), see informative annex ZA, which is an integral part of this document.

Other Parts of EN 10216 are:

Another European Standard series covering tubes for pressure purposes is:

According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom.

5

ISO 657-1 : 1988 (E)

Table 1 — Dimensions and sectional properties of hot-rolled equal-leg angles (concluded)

NOTES

1. Member countries may choose, to be included in their national standards, the sizes which are required to meet their demand.
2. For the angles so chosen, only thicknesses which can be rolled in their mills to meet the demand of the users may be selected from the list of thicknesses corresponding to equal angles in table 1.
3. The sectional area has been calculated using the formula

   S = [l/2 A - l) + 0,214 6 (r_root² - 2r_toe²)] × 1/100

   where
   

   S is the sectional area, in square centimetres;
   

   l is the thickness, in millimetres;
   

   r_root is the root radius, in millimetres;
   

   r_toe is the toe radius, in millimetres;
   

   A is the leg length, in millimetres.

4. Mass is calculated on the basis of density of steel of 7,85 kg/dm³.

   4