往复内燃机驱动的交流发电机组 — 第1部分：应用、额定值和性能

5.2 Power station

A power station comprises one or more generating sets and their auxiliary equipment, the associated controlgear and switchgear and, where applicable, the place of installation (e.g. a building, an enclosure or special equipment for protection from the weather).

6 Application criteria

6.1 Modes of operation

The mode of operation of the generating set may affect certain important characteristics (e.g. its economical and reliable operation, the intervals between maintenance and repair), and shall be taken into account by the customer when agreeing the requirements with the manufacturer (see also clause 11).

6.1.1 Continuous operation

Continuous operation is operation of a generating set without a time limit, but considering the maintenance period.

6.1.2 Limited-time operation

Limited-time operation is operation of the generating set for a limited time.

NOTE 1 The demand for electrical power from the connected equipment is supplied from the mains and only in the event of failure of the latter is it supplied by an internal generating set. If there is a failure in the normal power supply, the internal generating set, operating as a back-up or emergency supply, provides a supply temporarily or for a limited time for

a) safety equipment (e.g. during the evacuation of a building);

b) connected equipment which is important for the purposes of operation, to maintain emergency operation;

c) the entire group of connected equipment or part thereof.

The electrical power generated is used to cover a peak demand (peak-load operation).

There is no mains supply and the generating set is only operated from time to time.

6.2 Site criteria

6.2.1 Land use

Land use covers generating sets, either fixed, transportable or mobile, which are used on land.

6.2.2 Marine use

Marine use covers generating sets used on board ships and offshore installations.

6.3 Single and parallel operation

Generating sets may have two types of operation, defined in 6.3.1 and 6.3.2.

6.3.1 Single operation

Single operation refers to a generating set, irrespective of its configuration or modes of start-up and control, which will operate as the sole source of electrical power and without the support of other sources of electrical supply.

6.3.2 Parallel operation

Parallel operation refers to the electrical connection of a generating set to another source of electrical supply with the same voltage, frequency and phase to share the power supply for the connected network. The characteristics of the mains supply, including range and variation of voltage, frequency, impedance of the network, etc., shall be stated by the customer.

6.3.2.1 Parallel operation by generating sets

In this type of operation, two or more generating sets are electrically connected (not mechanically connected) after having been brought into synchronism. Generating sets with different outputs and speeds can be used.

6.3.2.2 Operation in parallel with mains

In this type of operation, one or more parallel-operating generating sets (as described in 6.3.2.1) are electricity connected to a mains supply.

NOTES

2 In the case of a public mains, permission for parallel operation has to be obtained from the public electricity board. Protective equipment has to be harmonized.

3 This also applies to generating sets which, in order to check the start-up, have to run supplying power into the mains for a time period laid down by the generating set manufacturer.

6.4 Modes of start-up and control

The modes of start-up and control involved in the operation of a generating set are normally

• starting,
• monitoring,
• voltage and frequency adjusting and synchronization where applicable,

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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.

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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.

Publications de la CEI établies par le même Comité d'Etudes

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Revision of this publication

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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.

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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

NORME INTERNATIONALE INTERNATIONAL STANDARD МЕЖДУНАРОДНЫЙ СТАНДАРТ

CEI IEC 50(426) Première édition First edition 1990-10 Vocabulaire Electrotechnique International Chapitre 426 : Matériel électrique pour atmosphères explosives International Electrotechnical Vocabulary Chapter 426 : Electrical apparatus for explosive atmospheres Международный Электротехнический Словарь Глава 426 : Электрооборудование для взрывоопасных сред © CEI 1990 Droits de reproduction réservés - Copyright - all rights reserved - Право издания охраняется законом Aucune partie de cette publication ne peut être reproduite ni utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique, y compris la photocopie et les microfilms, sans l'accord écrit de l'éditeur. No part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the publisher. Запрещается Без письменного разрешения издателя воспроизведение или копирование этой публикации или ее части в любой форме или любыми средствами — электронными или механическими, включая фотоконю и микрофильм. Bureau central de la Commission Electrotechnique Internationale 3, rue de Varembé Genève Suisse Commission Electrotechnique Internationale International Electrotechnical Commission Международная Электротехническая Комиссия Code prix Price code Код цены S Pour prix, voir catalogue en vigueur For price, see current catalogue Цена указана в действующем каталоге 3

50(715) © IEC:1996

CONTENTS

FOREWORD	VII
PREFACE	VII
Sections
715-01	Basic terms	1
715-02	Resources	10
715-03	Calls	17
715-04	Times and delays	22
715-05	Traffic	24
715-06	Circuit groups	32
715-07	Traffic engineering	34
715-08	Networks	41
715-09	Circuit switched networks	46
715-10	Message switched networks	51
715-11	Packet switched networks	52
Index	53

: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:

Part 1:	Non-alloy steel tubes with specified room temperature properties
Part 2:	Non-alloy and alloy steel tubes with specified elevated temperature properties
Part 4:	Non-alloy and alloy steel tubes with specified low temperature properties
Part 5:	Stainless steel tubes

Another European Standard series covering tubes for pressure purposes is:

EN 10217:

Welded steel tubes for pressure purposes

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.

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