I want to know how much the current will increase. But the transformers i'm looking at VCT VT10000 - 10,000 Watts Heavy Duty Continuous Use 110V / 220V / 240V Step Up / Step Down Voltage Transformer or 15,000 Watt Step Up and Step Down Voltage TransformerI figure the whats is the total possible power and if you divide the power by the intial voltage you get the current and if you divide by the out put voltage you get the final current? but what if you input doesn't equal 15000 watts or whatever the power is?
the power output of the transformer depends upon transformer ratio. transformer ratiosecondary voltage/primary voltageOR no. of secondary turns/no. of primary turns in this case, transformer ratio220/1102. and transformer's capacity is denoted in KVA or VA. also, a transformer can only transform power(increasing voltage levels while decreasing current level and, vice versa), but it can't change the amount of power. the power of a transformer will remain constant for any input. hence, if the input voltage decreases, the input current increases, making the power a constant. for a step up, output or secondary voltage will increase, magnitude depending upon the transformer ratio.
Bascally you are right. Watts is the maximum power, and dividing that by voltage provides amps. The transformer will pass what its load is consuming. If there is not enogh source eupply for the load, the source will burn out or blow its fuse/breaker.
The rating of a transformer like this one is really in volt amps, not watts. This is because the winding losses are proportional to the RMS current squared. If the load current is not in phase with the voltage, the power is voltage times current times the power factor which will be less than V*I.
