Industrial Power Cable Sizing

I need to size a power cable to connect a large channel inductor furnace to the power supply. The cable length will only be 3 to 4 feet.

How can I calculate the needed cable gauge at for up to 1500Amps at 4 feet length?

The specifics are as follows:

Power : 240 KW Voltage: 500 V Current ca. 1250 A Frequency 55 Hz These value should be considered with 5% tolerance.

The apparent power is 625 KVA, max. B = 1,65 T, the two inductor coils are connected serial.

By the same voltage and frequency, possible changes of operating point during running (wear diagram): 1. constant dislocation of the channel into direction of bushing:P=250 KW/ I=1310 A 2. constant dislocation of the channel opposite direction of bushing:P=220 KW/ I=1180A 3. enlargement of the channel cross section (washing out):P=250 KW/ I=1410 A 4. contraction of the channel cross section (growth, channel narrow):P=290 KW/ I=1050 A

Reply to
Loading thread data ...

If you use 310.16 in the US NEC you will come up with 3 parallel 800 kcmil 1470a or perhaps 3 900 kcmil 1560a That assumes 75c terminations.

Reply to

PolyTech Forum website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.