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 9 z 112

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Because little complicated situation in the field assessment products according relevant standards, cost testing equipment, it advisable cooperate with the relevant authorities., well people operating complicated electrical equipment (electrical station, substation, etc. its annex long list essential health and safety requirements to which all machines are deemed comply. These requirements are valid preferably for electrical equipment of machines. 170/1997 machinery gives requirements concerning assessment and declaration conformity, which necessary to maintain for every machine. These are: ordinary person person who neither skilled person nor instructed person person without electrical qualification, . The order itself does not specify emission limits and immunity levels but transfers this task relevant standards. There exists important clause, which assumes that all products used the sphere civil engineering and building’s construction shall used sensible manner. Requirements concerning electrical equipment of machines are among them.) shall people with definite qualification order not endanger themselves other people with their activities. That means according electrical equipment that all elements electrical installation shall used according regulations for electrical installations (wiring regulations).VALID TECHNICAL RULES 10 covers nearly all kinds electrical apparatus. 50/1978 (qualification persons) deals with the qualification persons working electrical equipment. There are three basic qualifications of persons relation the work electrical equipment and installation. That the reason why among standards harmonized this order are basic standards for electrical equipment and installations. 1. The qualification persons intended for the work and operation on electrical equipment follows the rule: "the more difficult, complicated, and dangerous the work is, the higher qualification shall the competent person fulfill". Government order No. This order gives some principles for certification and conformity declarations. 178/1997 products used building construction industry (civil engineering) gives space for authorities the process assessment products. The reason for publishing this notice was evident. Government order No. Notice No. These are requirements for safety connected with reliable operation of control systems actuators. There exist system European standards for electrical equipment machines inside the whole system standards for machinery. Therefore persons immediately constructing, producing repairing the electrical equipment, installation, etc. give the industry and users convenient tool cope with this order system of European standards was developed. When constructed operated inappropriate way, electrical equipment may cause danger for persons, livestock, well for property.2