I assume you mean its 'rated amperes per line'? Manipulate the following equation to make I its subject:
Rated Apparent Power = 1.732 x VL IL
By 'volts per phase', I assume you mean 'phase voltage' as opposed to 'line voltage'?It depends on the country in which you live. In North America, for example, the secondary output of a three-phase distribution transformer typically delta connected, 240 V corresponds to both the phase and line voltages.In other countries, where a three-phase distribution transformer's secondary is wye connected, 240 V is typically a phase voltage and 415 V is a line voltage.
who knows 30kva means 30000 volts per ampere so if the output is 100 volts the amps will be 300 amps so do the math.
NO, ONLY ONE. If you are measuring line current. The purpose of the line to line measurement is to know if your load is drawing balance ampere and slight difference is negligle.
The numerical representation of one coulomb of charge moving past a point in a circuit per second is called an ampere.
You use three CTs, one per line conductor, each feeding a separate ammeter,
I(per Phase)=4000/(230*3) = 5.8A
..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..
Regulation =(Obtained voltage per phase - rated voltage per phase)/rated voltage per phase *100
Find the wire from the secondary of the transformer. If it's a step-down transformer the thicker wire is the secondary. Measure its diameter in inches and calculate its cross-section area in square inches. The current rating for transformer wire is 1000 amps per square inch, or 1.55 amps per square mm.
By 'volts per phase', I assume you mean 'phase voltage' as opposed to 'line voltage'?It depends on the country in which you live. In North America, for example, the secondary output of a three-phase distribution transformer typically delta connected, 240 V corresponds to both the phase and line voltages.In other countries, where a three-phase distribution transformer's secondary is wye connected, 240 V is typically a phase voltage and 415 V is a line voltage.
who knows 30kva means 30000 volts per ampere so if the output is 100 volts the amps will be 300 amps so do the math.
There is no such thing as a 'total current' for a three-phase generator in the sense that you suggest -i.e. the sum of the phase currents. Current ratings are based the current that the machine can deliver to a load on a 'per line' basis.
Find the wire from the secondary of the transformer. If it's a step-down transformer the thicker wire is the secondary. Measure its diameter in inches and calculate its cross-section area in square inches. The current rating for transformer wire is 1000 amps per square inch, or 1.55 amps per square mm.
The numerical representation of one coulomb of charge moving past a point in a circuit per second is called an ampere.
NO, ONLY ONE. If you are measuring line current. The purpose of the line to line measurement is to know if your load is drawing balance ampere and slight difference is negligle.
You use three CTs, one per line conductor, each feeding a separate ammeter,
You will need to determine the power per phase, and add them up to give the total power of the three-phase load. To do this, you will need to multiply the phase-voltage by the phase current by the power factor -for each phase.