Question { 12242 }

Where we can use 3.5c cables instead of 4c cables.Why?

Answer

IT DEPENDS ON THE LOAD SITUATION AT THAT PARTICULAR PLACE. IN CASE THERE IS MOE THAN 50% MOTOR LOAD I.E. 3 PHASE LOADS ONLY AND LESS OF SINGLE PHASE LOADS; THEN IN THAT CASE WE COULD USE 3.5C CABLES. BUT WHERE THE AMOUNT OF SINGLE PHASE LOADS ARE MAXIMUM AS COMPARES TO 3 PHASE LOADS; THEN IN THOSE CASES IT WILL BE NECESSARY TO USE 4C CABLES.

Question { 3443 }

what is RCBO?

Answer

Well, an RCBO is a single device which combines the functions of an MCB (overcurrent and short-circuit protection) and an RCD (Earth leakage protection).

Read more: http://www.diynot.com/forums/viewtopic.php?t=80920#ixzz1o27W3VPq

Question { Siemens, 7181 }

How to work star delts method in the case of single phase
motor?

Answer

Well today we have DOL direct on line starters for upto 100 hp and more too.
So Star Delta for 1 ph motor does not arise. Question itself is wrong. No practical question.

Question { KSEB, 18298 }

what is the voltage regulation constant of ACSR Raccoon
conductor

Answer

Thus for33kV line with 48 sq mm ACSR conductor, the maximum
limit is135 MW-KM at 9%
voltage regulation and 0.8 PF.
For 11KV and L.T. lines, the maximum kW-km at permissible
Voltage Regulation are tabulated below
However, some State Electricity Boards follow regulation limit
as 5% and 8% respectively. The
load carrying capability of 33 kV and 11 kV lines is given
below:
For 33kv Raccoon the permissible voltage drop is 5%.