By A. Wright, C. Christopoulos
Electrical strength method Protection presents training engineers with the main updated and complete one -volume reference and educational on energy process defense to be had. targeting primary tools and know-how and with huge examples drawn from present perform the world over, this publication might be an incredible reference device for engineers concerned with and laid low with energy approach protection.
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Extra resources for Electrical Power System Protection
For this reason Wright and Beaumont  developed a model based on a number of simplifying assumptions. They considered it to be superior to earlier models because it was based on the processes occurring during arcing and took account of energy changes. Work of this type is still proceeding to enable the amount of testing currently required to be reduced greatly in the future. Details of work done recently in this field were given in papers presented at the Fourth International Conference of Electrical Fuses and their Applications .
In this situation clearance should be effected quickly enough to prevent damage to the cables. 5. A further possibility is a short circuit between the conductors of the connecting cables. e. between points A and B. For such faults the fuse should operate rapidly enough to prevent damage to the source and the supply cables. 1 Time/current relationships To achieve the above criteria, fuselinks should have time/current characteristics which lie close to the withstand curves of their associated circuits as shown in Fig.
Another matter of significance is that doubts were being expressed around the tum of the century about the use of fuses as protective devices, possibly because their manufacture was not adequately controlled. Apparently they were causing unnecessary interruptions of supplies to consumers. This was referred to by Andrews  in a paper presented to the lEE in 1898. e. interruptions of supply), to the fact that they use fuses made from copper of the same cross-sectional area as the mains'. 'If any fuses that it is customary to be used can be omitted, everyone will admit that they are a source of danger, and consequently better omitted'.
Electrical Power System Protection by A. Wright, C. Christopoulos