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Technical guide - 6th edition 2010

Electrical installation handbook Protection, control and electrical devices

Electrical installation handbook Protection, control and electrical devices

First edition 2003 Second edition 2004 Third edition 2005 Fourth edition 2006 Fifth edition 2007 Sixth edition 2010 Published by ABB SACE via Baioni, 35 - 24123 Bergamo (Italy) All rights reservedElectrical installation handbook Protection, control and electrical devices

General aspects

Part 1 Protection and control devices

Part 2 Electrical devices

General aspects

Index
Introduction ............................................................................................................... 6
1 Standards 1.1 Generalaspects.............................................................................................. 7 1.2 IEC Standards for electrical installation.......................................................... 19

Introduction
Scope and objectives The scope of this electrical installation handbook is to provide the designer and user of electrical plants with a quick reference, immediate-use working tool. This is not intended to be a theoreticaldocument, nor a technical catalogue, but, in addition to the latter, aims to be of help in the correct definition of equipment, in numerous practical installation situations. The dimensioning of an electrical plant requires knowledge of different factors relating to, for example, installation utilities, the electrical conductors and other components; this knowledge leads the design engineer toconsult numerous documents and technical catalogues. This electrical installation handbook, however, aims to supply, in a single document, tables for the quick definition of the main parameters of the components of an electrical plant and for the selection of the protection devices for a wide range of installations. Some application examples are included to aid comprehension of the selection tables.Electrical installation handbook users The electrical installation handbook is a tool which is suitable for all those who are interested in electrical plants: useful for installers and maintenance technicians through brief yet important electrotechnical references, and for sales engineers through quick reference selection tables. Validity of the electrical installation handbook Some tables showapproximate values due to the generalization of the selection process, for example those regarding the constructional characteristics of electrical machinery. In every case, where possible, correction factors are given for actual conditions which may differ from the assumed ones. The tables are always drawn up conservatively, in favour of safety; for more accurate calculations, the use of DOCWinsoftware is recommended for the dimensioning of electrical installations.

6 Protection, control and electrical devices | ABB

1 Standards
1.1 General aspects
In each technical field, and in particular in the electrical sector, a condition sufficient (even if not necessary) for the realization of plants according to the “status of the art” and a requirement essential to properly meet thedemands of customers and of the community, is the respect of all the relevant laws and technical standards. Therefore, a precise knowledge of the standards is the fundamental premise for a correct approach to the problems of the electrical plants which shall be designed in order to guarantee that “acceptable safety level” which is never absolute. Juridical Standards These are all the standards fromwhich derive rules of behavior for the juridical persons who are under the sovereignty of that State. Technical Standards These standards are the whole of the prescriptions on the basis of which machines, apparatus, materials and the installations should be designed, manufactured and tested so that efficiency and function safety are ensured. The technical standards, published by national and...