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CHAPTER – 3 ELECTRICAL PROTECTION SYSTEM
www.iitr.ac.inTwo forms of back up protection are provided. These are protection failure or circuit breaker failure. Best form of back up protection for any system is one in which both ac and dc supplies are completely separate from main protection. Economic consideration determines the extent to which back up protection is provided. 3.1.7 Fault Data
Power System Protection - College of Engineering and ...
www.cet.edu.inThe backup protection is normally different from main protection and preferably of non-unit type. Ex: overcurrent or distance protection ... 1.8 Economic Considerations The cost of protection is linked with cost of the plant to be protected and increases with cost of the plant. Usually, the protective gear should not cost more than 5% of the total