Primary : 4
Secondary : 3/0
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To answer this question correctly a voltage must be stated.
Depends on the voltage. If it is a 460v transformer that is 32 amps. So you could use #8 AWG.
According to BSS 2006 you can use 10 mm Cable
2
For single phase, KVA = (line to ground) * (phase current). A 75kVA 480 to 208Y/120 volt transformer is a fairly common transformer. I assume this is the type of transformer you are referring to. 75k / 120 = 625 Amps. As an FYI, the 208Y voltage is the line to line voltage, which is equal to (phase 1) - (phase 2), where the phases are separated by 120 degrees, thus (phase 1) * 1.732 For three phase, kVA = (line to line voltage) * (phase current) *(sqrt 3), 75k / 208 / 1.732 = 208 Amps.
15/600 * 200
Transformers can be used in either step-up mode or step down mode, they are just as efficent connected either way. Most large transformers have percentage "taps" to allow voltage corrections up or down by about 15%.
Hi - it should be OK but the transformer might overheat a little if it is used intensively, so it need to be used carefully. The reason is that the magnetic flux in the core is 15-20% greater at 50 Hz, and that increases the heat produced in the transformer. Going in reverse, a 50 Hz transformer will work fine on 60 Hz.
What size breakers are needed for a 30kva transformer 208 volt feed 600 volt out put
The lamp uses 240 x 4.9 VA, that is 1176 VA, so a 15 kVA transformer, which is 15,000 VA, could feed 12 lamps.
The power in a 15 MVA (15000 KVA) transformer depends on the power factor. You did not specify the power factor, so I will assume a power factor of 0.92. Simply multiply MVA by PF and you get 13.8 MW.
Each phase supplies 15 kVA. The primary has a line-to-neutral voltage of 277 v so the line current is 15,000 / 277 or 54 amps. The secondary has a line-to-neutral voltage of 120v so the current is 15,000/120 or 125 amps.
AWG 10.
15 amps.
The minimum size home wiring is #14 AWG, the rating for that size wire is 15 amps.
The minimum size home wiring is #14 AWG, the rating for that size wire is 15 amps.
Yes, if you use a 240 volt to 480 volt step up 15 KVA transformer. This will give you 30 amps usable at 480 volts.
The wire size depends on how much current it will conduct.
15 amps
For single phase, KVA = (line to ground) * (phase current). A 75kVA 480 to 208Y/120 volt transformer is a fairly common transformer. I assume this is the type of transformer you are referring to. 75k / 120 = 625 Amps. As an FYI, the 208Y voltage is the line to line voltage, which is equal to (phase 1) - (phase 2), where the phases are separated by 120 degrees, thus (phase 1) * 1.732 For three phase, kVA = (line to line voltage) * (phase current) *(sqrt 3), 75k / 208 / 1.732 = 208 Amps.