y arjuna rao


{ City } vizag
< Country > india
* Profession * asst.engineer
User No # 66488
Total Questions Posted # 2
Total Answers Posted # 2

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Questions / { y arjuna rao }
Questions Answers Category Views Company eMail

how to calculate the breaking capacity of different breakers.

UltraTech,

Electrical Engineering 1672

what are the factors to be considered while design the breaker either HT or LT??

Electrical Engineering 1382




Answers / { y arjuna rao }

Question { 13281 }

WE HAVE A LOAD OF 55KW MOTOR ITS VOLTS 380 3PH AND ITS
TAKING 100AMPS (ITS FULL LOAD IS 105AMPS)AND ITS CABLE IS
4CX50SQMM ,NOW ITS GETTING ABNORMAL HEATUP IN CABLE,PLZ
TELL WHY ITS HEAT-UP?(CABLE LENGTH IS 15 METERS ONLY)


Answer

if you are used 50sq.mm alu.cable it may not sufficient to
carry the 100 amps current,for alu. cable 1A for 1Sq.mm is
a safe factor load.if your cable is copper it is enough to
carry your load.as per your information your cable length
is not a problem.

Is This Answer Correct ?    1 Yes 1 No

Question { 8136 }

what is the purpose of checking IR and Megger values in
motor windings?


Answer

purpose of checking IR value is to find,the insulation
resistance between the phases of winding and with
respective to body also.
Minimum IR value required is for 2megaohms/1KV

Is This Answer Correct ?    4 Yes 0 No