suppose we using 3 phase motor of 440 v means what range of
C.T. is require for measuring current , the rating of motor
is 1HP ?

Answer Posted / simon

1 HP=735.5W
735.5W=440V*1.67Amp
So no need of C.T U can use only AMETER.

Is This Answer Correct ?    3 Yes 0 No



Post New Answer       View All Answers


Please Help Members By Posting Answers For Below Questions

What is the difference between UPS & inverter ? which UPS is better and whos got the edge ? what is the difference between & inverter ? which UPS is better and whos got the edge 12 V , 24 V , 36 V etc what are the advantages of 12 V, 24 V , 36 V etc and what are the disadvantages of 12 V, 24 V, 36 V etc thanks

1488


what should be correct gas pressures to be a 1.5 ac unite

1078


how can maintaince the acb contactor moveing and fixing kit

1599


1)how to reduce the value of tan delta of trasformer and CB,bushing,CT&PT,CVT ? 2)how to reduce the resistance of CB contact and its operating time? 3)plz.....send me the project report on conditioning and monitoring of substation equipment on my email id (gusaiyogendra03@gmail.com)

1818


how to calculate current carring capacity of cable and cable selection? 1) copper flexible cable 2) copper armoured cable 3) Aluminium cable

1063






need to make a report. Need to choose a 3phase induction motor. Load conditions motor will operate in : Maximum Load: 30 Kw Speed: 2950 rpm Ambient temp: 20 cent Supply voltage: 440V Frequency: 50Hz need to look for the safety factor when choosing the motor, went through catalouge found a few, but dont know how to choose the safety factor allowing an extra load something above 30 KW to avoid any harm.

1319


what is the constructional difference between a power transformer and potentian transformer?

1269


Which Class insulation is prefered for the sandwich Busducts ? Why?

1566


how to conduct dc resistance test for rotor of an alternator and how to measure the rotor dc resistance value theoritically?

2823


how is the testing of an REF relay? what are the test REF circuit having?

1468


The transmission does not have options: a)Partition noise b) Flicker noise c) resistance d) Short noise and reason

1945


what is the necessity of under ground cables ??

1636


I am completed DEEE in tamilnadu, now i am working in andhrapradesh with 2.5 year experience in relavent field. capacity of the tranformer is 11KV, 1MVA Transformer, i am eligible for getting c licence in andhrapradesh pl help me.

1136


is there any lightning by passer is arranged in ship like buildings?

1482


A cylindrical wire is compressed in length by 10%. The percentage decrease in the resistance will be?????

1761