Inrush current carrying capacity of Cable
Inrush current carrying capacity of Cable
(OP)
Is a 50mm2 XLPE Power Cable rated 230A can withstand a starting current of a motor with a magnitude of 640A for about 3-5 cycles? Is is possible for us to have a 10-15 motor start-up/day... The power cables is rated for 90C continuous operation and can carry a 250C short-circuit rating. Is there a chart were we can find to relate the 90C and 250C temp. unit to current unit






RE: Inrush current carrying capacity of Cable
The manufacturer should have a destruction or failure curve for the cable similar to a fuse curve on a current-time log-log graph. Should be considered when doing coordination study. Some coordination study software provides generic information. If you have the plant coordination study is could have that information on there.
Best Regards
Ray Micallef, P. Eng.
Power Generation/Utility Industry
RE: Inrush current carrying capacity of Cable
RE: Inrush current carrying capacity of Cable
RE: Inrush current carrying capacity of Cable
In the vast majority of cases, Inrush effect on cable withstand capability should not be a concern. If you would like to proof that check the enclose information that could be used as a tool for this purpose.
http://www.kerite.com/catalog/catalogfiles/short_circuit_limitations.htm
RE: Inrush current carrying capacity of Cable
Normally, the cable tends to withstand higher currents than the motor when it comes to more frequent starts.
RE: Inrush current carrying capacity of Cable
Thanks a lot, especially to cuky2000 atleast i can support my claims that it will not be a problem with the cable..As per jbartos normally the problem will be the motor for it has a limitation with no. of start-up...
regards