The current is limited by the fuse or circuit breaker.
In three phase: I = (three phase VA) / (sqrt(3) x (phase to phase voltage)) for single phase: I = (single phase VA) / ((phase to neutral voltage)) keep in mine three phase VA = 3 x (single phase VA), and phase to phase voltage = 1.732 x (phase to neutral voltage) Therefore the single phase and three phase currents are the same (ie, the three phase currents are the same in all three phases, or balanced). But don't get available current and available power confused (KVA is not the same as KW).
A 3 phase system needs only to use 3 or 4 conductors, as against 6 conductors if it were 3, single phase conductors The amount of copper used in a 3 phase is much less than what would be needed in a single phase system carrying the same current, this reduction in copper allows for weight reduction and cost savings. The power losses in a 3 phase system are much less than in a single phase system.
The wiring should allow for 115 amps.
P=VI P=power V=voltage I=current therefore current drawn is 5000/400=50/4=12.5 amperes
For 1 hp motor, a single phase starter is used. Because a single phase starter gives economy consumption,easy trouble shooting and easy installation when compared to three phase starters and supply....
I dont know if you can actually convert the oven's wiring from 3-phase to single phase. You can, however, convert the single phase circuit that will feed the oven to a 3-phase system. To this you will need a phase converter. Now, where to purchase such an item, and how much they cost? i have no idea.
- For a single phase supply @ 220 voltscurrent drawn by 5kva UPS = 22.7 amperes (at full load.)
118.72 amp current will be consumedAnswerFirst of all, 70 horsepower is the machines output, not its input, so you cannot calculate its current without knowing its efficiency. Secondly, the current also depends on the type of motor -is it a.c. or d.c? Is it single-phase or three-phase? Without this information, your question cannot be answered.
There is more current flowing and the wire can not flow that much current.
It is more economical especially for running motors. Most motors start much better with 3 phase service. It also takes less current than single phase for a motor to run, therefore the power meter spins less for electrical cost.
How much current equipments are drawing from three phases (combined or individual) is called three phase load and how much supply we are getting from source is called three phase supply. Ex. In INDIA single phase supply is 220 volt ac with neutral. So in three phase supply all RYB phases should be 220 volts ac with neutral individually. If we calculate with phase to phase than it shoulb be 415 volts ac.
..the questions does not say wether the 30kVA transformer is 3 phase transformer or single phase transformer..but it is implying that a single phase welding load at 16A per phase is to be connect to it, it is assumed then that the transformer is 3 phase transformer..we assume load is rated 240V.. ..though not much details is given about the transformer voltage specs. but if is rated 3 phase 415/240V, the approx full load current per phase is given by 30KVAx1.3912=41.736A.. ..but if the transformer was rated single phase 240V say, the approx full load current FLC=30000/240V gives 125ampers.. ..if you further devide the FLC by the intended load current.. ..Recommended no of welders per for a 3 phase 415V transformer and assuming single welding sets =41.736/16=2.6..so you can connect max two welding sets to this transformer per phase,..max 6 weld sets can connect at an approx load factor of 76%.. ..for the single phase transformer, FLC/16=125/16, gives 7.8 but is also recommended not to connect more than 6 welding sets to such transformer for the same reasons..