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