Introduction to Electrical Engineering

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Pro: ČEKO IMPORT a.s.
Vydal: České vysoké učení technické Praha Autor: Vladimír Kůla, Michal Kříž

Strana 8 z 112

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This advantageous keep them because when following harmonized standards relevant technical regulation valid for product protects the producer against braking regulation. This not any secret that the system technical regulations and harmonized standards was created according the European system, i. Government order No.VALID TECHNICAL RULES 9 between technical regulations and harmonized standards that Technical regulations constitute part the Czech legislation and disobedience them penalized. Harmonized standards as well other technical standards are voluntary documents. Government order No. will mention some of them concerning electrical engineering.e. this case necessary prove that the product is made and distributed according the regulation another way than prove that the product is meeting the requirements relevant standards. 168/1997 low voltage equipment is laying down technical requirements relating electrical equipment designed for low voltage. Then very difficult show that everything was all right, only the standards were not used. system directives the European community and European harmonized standards. legislative basis for the construction the most electrical products. Shortly saying: The general characteristics concerning safe use electrical equipment well the manufacturers brand name shall marked it, and electrical equipment should designed and manufactured ensure protection against the following hazards: Hazards arising from the electrical equipment, above all, i. 22/1997 published nowadays form government order and number them increasing continually. will not speak about all them. This order gives particular requirements concerning assessment and declaration conformity and its annex laying down principal elements the safety objectives for electrical equipment. This true that necessary usually only in case some accident.e. 169/1997 electromagnetic compatibility . Nevertheless possible manufacture the product without using harmonized standards. a) mechanical impacts and other mechanical influences; b) expected environmental conditions (temperature, humidity, radiation etc.); c) foreseeable conditions overload (overcurrent). a) danger physical injury other harm which might caused electrical contact direct or indirect; b) high temperatures, arcs radiation which would causes danger; Hazards which may caused external influences electrical equipment, e. There are technical regulations according the Act No