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Use of equipment built-in automatic testing - self-checking and monitoring with a view to improving reliability.



The increasing sizes of power networks with increasing transfer of energy and fault current levels have stressed the importance of reliable fault clearing. Great care is taken in circuit design, selection of components, careful production and quality control to assure reliable fault clearing. Nevertheless components in the fault clearing chain will degrade by time or fail suddenly and cause either failure to operate or incorrect operation.

Pages NB: 45

Year: 1986


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