Question { L&T, 146660 }

Why a starter is used for a motor?

Answer

Starter is not always used for limiting starting current as dol starter doesn't reduce starting current.
There are many other uses of starter:
1. For motor control from DC's
2. For providing protection against under voltage, over voltage, over current, overload etc

Question { 6127 }

srij i need the relationship b/w KW AND KWH and with an
electrical example. plz send if u can?

Answer

1KWh= 1 KW * 1 he
i.e if we run an equipment of 1 kw for 1 hour then energy consumed will be 1 kWh i.e 1 unit

Question { 2066 }

our plant maximum demand has 500 kva.need to suggest me to maintained pf 0.98.how much capacitor bank will be connect to the supply line.

Answer

This depends on what is the current pf in your company. Then
tan¢=(Qpresent+ Qcap)/Ppresent