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 89 z 112

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OPERATION ELECTRICAL INSTALLATIONS 90 - operations intended modify electrical installation, use equipment, connect, disconnect, start stop equipment designed used for this purpose without risks so far reasonably practical. The following five essential requirements: - disconnect completely, - secure against re-connection, - verify that the installation dead, - provide earthing and short-circuiting, . Measurement may be required check the correct functioning equipment ensure that safety precautions are adequate. Measurement Measurement defined activities measure physical data. Only skilled instructed persons shall carry out disconnecting reconnecting before or after dead working. Working procedures General According the basic principles, the nominated person control the electrical installation and the nominated person control the work activity shall both ensure that specific and detailed instructions are given the personnel carrying out the work before starting the work.g. Inspection The purpose inspection verify that electrical installation accordance with specified technical and safety regulations the relevant standards and may include verification of the normal state that installation. 10. Testing Testing includes all activities designed check the operation the electrical, mechanical, thermal condition electrical installation. Testing includes also activities prove the effectiveness e. protective devices and safety circuits. Testing may include measurement activities. New electrical installations well modifications and extensions existing installations should inspected prior their being brought into operation. Operating activities may carried out locally remote control. The most work activities are being provided dead working.2. - disconnecting reconnecting installations for working. Electrical installations shall inspected suitable intervals. Defects, which constitute immediate danger, shall rectified without delay