Answer Posted / karthik_elec
fuse is calculating with fuse factor, for example,
if u want to protect one equipment, that equipment taking 10 amps, if u put 10 amps fuse, that fuse will operate in 14.5 amps 4 hrs continues running, fuse factor is 1.45, fuse operating current = 1.45(fuse factor)*10(fuse rating). that means 14.5A 4hrs continues running. this is from IEC (INTERNATIONAL ELECTRO TECHNICAL COMMISSION)
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at work we have a 3 phase motor but on testing one phase isnt getting a reading. it runs 24 hours a day all week. stops and starts well no noise or heating. the phase isnt down to earth.is it just a bad meter reading or not? phases one and three came up with a resistance reading of 0.4 but phase 2 couldnt get anything shows up as open circuit.
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