- This topic has 2 replies, 3 voices, and was last updated 13 years, 5 months ago by
.
-
Posts
-
I have 8 meter in the 1st floor , the rate in the meter 3×127/220 and 3×220/380 also 40/160 Amper the Breaker is 150 A
Can I get the KVA from these information, and the the right size of the cable.
best regards
If you're just looking to size the cable then why not use the existing overcurrent protection rating for the service? I t would either be a fused disconnect or a main circuit breaker.
Freeknow said:
I have 8 meter in the 1st floor , the rate in the meter 3×127/220 and 3×220/380 also 40/160 Amper the Breaker is 150 A
Can I get the KVA from these information, and the the right size of the cable.
best regards
Dear ;
First, we can calculate the power in kVA by the following formula :
– For 3 phases network : S = 1.73 x U x I
where :
– S : Ther Power in ” VA “
– U : The voltage between 2 phases in ” Volt “
– I : The line's current in ” Amp “
About the cable, if you have a circuit breaker ” 150A ” that's means you should use a cable that can withstand in the working conditions at least 150A, so, to know the relative section, you should know the working conditions : type & kind of cable, methode installation, and the ambiant temperature, then accordingly define the correction factors, so you can do the correct choice of cable's section from the table of ” IEC 364-5-52 “.
Regards.
- You must be logged in to reply to this topic.