how much current capacity of 300 sq. mm cable (4 core
aluminium) and 150 sq. mm cable ( 4 core aluminium)
Answer Posted / 7anoter4
It depends on lot of factors. The duration of the load:
short-time[as in short-circuit case],continuous load,
intermittent load. It depends on also on ambient type [air,
underground-direct laid or in concreted duct],on thermal
resistivity of the ambient [if it is in underground],on
ambient temperature, on insulation type[bare, pvc, xlpe,
epr etc.] and other factors.
Let's say in short-circuit case for 1 sec 300 square mm
aluminum conductor pvc insulated. Permissible temperature
[for PVC short-time]= 150oC.Ambient air 30oC.
Ipermissible=27 kA[27000 A].
For the same cable in open air 30oC[NEC Table 310.15(B)
(17)] continuous load [75 oC]600 MCM=300 sqr.mm permissible
545 A
Is This Answer Correct ? | 1 Yes | 3 No |
Post New Answer View All Answers
(1)The demand for electricity , the amount of renewable generation available, the amount of fossil fuel generation available and the cost of the fossil fuel generation are shown in table below period(hrs) demand(MW) renewable (MW) fossil- fuel(MW) cost of fossil fuel(MW) 00.00 - 01.00 2000 1800 2000 30 01.00 - 02.00 2300 2500 2000 30 02.00 - 03.00 2500 2700 2100 45 03.00 - 04.00 2900 3100 2100 50 04.00 - 05.00 2700 2600 2500 45 05.00 - 06.00 2400 2000 2700 50 06.00 - 07.00 2200 1800 2000 36 07.00 - 08.00 2100 1600 2000 36 Assuming that the renewable generation incurs zero cost, determine an optimal generation schedule(specifying the amount of renewable generation and fossil fuel generation used in each period, the cost for each period and the overall cost for 8 hours.)
what is a power factor?
How will change the frequency in distribution side?
What is resolution of a measurement?
Details about Flux Compensated magnetic Amplifer starter for motors
How do you compute voltage drop and cable size over distance?
Pl. give me checklist for installation & commissioning of machine tool.
What are the functions of different probes used in cro?
What happens if the negative to earth voltage is greater than positive to earth voltage in the battery of substation?
Thumb rule of cable size(rm>30 rm)X multiplying factor=ampere
what is the difference between droop mode and ischnorous mode in thermal powerplant?
List the disadvantages of constant k filters?
CAN ANYBODY PLEASE TELL ME HOW TO DESIGN A SERIES REACTOR FOR LIMITING SHORT CIRCUIT FAULT CURRENT??
How to determine alternating current frequency?
How does cost of generation from hydropower plant compare with other sources of electricity?