electrical installation technology 0.0 / 5 ? OtherProtective deviceOtherNone Created by: lee42Created on: 07-03-20 21:55 What is meant by overcurrent? excess current is a situation where a larger than intended electric current exists through a conducto 1 of 16 overcurent can be dived in two categories? overload cuurent and fault current 2 of 16 definiton of overload current? A current greater than that which a circuit is designed to carry 3 of 16 What does fault current mean? fault current is any abnormal electric current 4 of 16 definiton of protector conductor current? electric current appearing in a protective conductor, such as leakage current or electric current resulting from an insulation fault 5 of 16 List five sizes of BS3036 fuses? (semi enclosed fuse) 5A WHITE, 15A BLUE, 20A YELLOW, 30A RED, 45A GREEN 6 of 16 state the advantages of BS3036 fuse? simple to check if blown, low cost, no moving parts 7 of 16 state the disadvantages of BS3036 fuse? detiroates with age, cant break large fault current, danger of being repaired with wrong size wire 8 of 16 State 3 advantages BS88-3:2010 (cartridge fuse) small physical size, accurate current rating, no mechanical moving parts 9 of 16 State 3 disadvantages BS88-3:2010 (cartridge fuse) more expnsive than rewirable, can be shorted by silver foil, cannot break large fault current 10 of 16 State 3 advantages BS88-2:2010 operation very quick, declared rating very accurate, no mechanical moivign parts 11 of 16 State disadvantage BS88-2:2010 expensive 12 of 16 state 3 advantages of BS EN 60898? the cicuit provides discrimination, tripping characteriusitics, cicuit protection difficuklt to interefre with 13 of 16 state a disadvantage of BS EN 60898? contains mechanical moving parts 14 of 16 state 3 classification of circuit brekaers available today? Low voltage, medium voltage, high voltage 15 of 16 what is the genral pricniple of RCD? it will trip if there is current leakge 16 of 16
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