Answer Posted / s bagchi
Step1: convert the kva or kw load into amps by dividing
with the respective voltage & pf in case of kw.
Step2: refer a cable catalogue & derate the current
considering temperature rating factor & group rating factor.
Step3: select a cable size considering the derated current.
at first you need to calculate the min cable size in case
of ht cables considering short time current & the fault
clearing time of the upstream breaker.
Is This Answer Correct ? | 7 Yes | 1 No |
Post New Answer View All Answers
Please explain the following and how these are working with PLC unit 1.I/O Module 2.I/O Device 3.Adaptor Card 4.Ribbon Adaptor 5.RS 485-FC
how to select the isolation tranformer for siemens 802dsl cnotroller
Dear sirs, pls check this 4-20ma to RS485 module datasheet,pls guve me some suggestions. http://www.szsunyuan.com/sy/pro_more.asp?Productid=539 Thanks. E-mail:yunianjiang99@gmail.com
How much current will a 5 HP delta connected motor at no load will take?Is tat need a starter
The moisture in air will condense at
How to calculate the fuse rating depend upon the DC circuit?
what is the operating time for LBB and how does the LBB relay realise whether cb is opened or not?
what is basic difference betmeen normal & flame proof motor??
why impudance relay used for medium transmission power system? why not others?
what is the meaning of vcc
what is R Core Transformer. how it differs from normal transformers. dont search in net and post the answer.
We have a distribution transformer of 750KVA/11kv/440v and an AVR (Servo Stabilizer) of 750KVA on the LT side of distribution transformer. Also we have an ACB of 1200A on the output of distribution transformer (that is on the input of AVR). We want to have an MCCB on the output of AVR. What should be the rating?
how to select the double earth conductor if 21A full load?
The efficiency of a 100kva transformer is 0.98 at full load as well as half load , for this transformer what is the Copper loss at full load ?
What is power in wattage of 8.5 TR AC