HOW CIRCUIT BREAKER RATING CALCULATED?WHAT ARE THE
PARAMETERS CONSIDERED?

Answer Posted / p l narayana

circuit breakers are selected in kva which can calculated
from the fallowing equation
KVA Rating=3^0.5*phase voltage*short circuit current*1.25

Is This Answer Correct ?    2 Yes 5 No



Post New Answer       View All Answers


Please Help Members By Posting Answers For Below Questions

Anyone who can recommend an equivalent to Envirotemp FR3 of Cooper?

1508


How to find out damper winding failure for synchronous machine?

999


Difference between drift current and diffusion current?

1315


High voltage test procedure of in swgr board. why should measure millivolt drop on testing time?

1636


I Want randstand placement papers

1366






What is a fuse? How does it work? What are materials used?

1534


During FEED, you will have all the information with regards to cable. How will you calculate the MTO for MV and LV Cables? what are your considerations?

2038


Is potential difference materials property ..? if yes tnen how.. explain brifly.

1542


how diside ct mf exmp.200/5 ct

1650


what is DRP panels?

1682


An ISP is granted a block of addresses starting with 150.80.0.0/16. The ISP wants to distribute these blocks to 2600 customers as follows. a) 200 medium size businesses; each needs 16 addresses b) 400 small businesses; each needs 8 addresses c) 2000 households; each needs 4 addresses Design the subblocks and give the slash notation for each subblock. Find out how many addresses are still available after these allocations.

7019


Define the term factor of inertia.

1449


why all the feeders are designed in a particular manner ... is there any reason for that???

1501


Saving in copper achieved by converting a 2 winding transformer in to an auto transformer is determined by A voltage transformation ratio B load on secondary C quality of core material D size of transformer core

2497


Dry type transformers

1411