I use transformers in my circuitry all the time but when a transformer is say a secondary 12v 1a transformer than what does it mean by 1 ampis it that the secondary winding wire will pop after 1 amp doo to the simple thinness of the wire? or that the ohms of the secondary coil, when using iv/r, 112/12so does this tell you that the coil is 12 ohms?please don't give me other information about the transformer just answer the question please.
NO, IT DOES NOT MEAN IT HAS 12 OHMS IMPEDANCE. IF YOU SHORT THE 12V TERMINALS, IT COULD PRODUCE MORE THAN 1A BEFORE IT TURNS INTO SMOKE. 1A IS THE MAXIMUM SAFETY CURRENT LIMITATION TO BE OBTAINED FROM 12V TERMINALS TO MAINTAIN 12 VOLTS WITHOUT DROPPING.
if transformer has secondary rated for 12V 1A, it means that you can get 12VAC out and maximum of 1A. If you exceed the current you will cause transformer to overheat and eventually burn. It does NOT tell you that coil is 12 Ohm, it tells you that largest load (lowest resistance) that you can safely connect to this transformer is 12 Ohm. If you connect 10 Ohm, you are going to see larger current which will overheat and eventually ruin transformer. you can use ampacity tables to determine minimum wire size to carry current of some magnitude.for example for 1A you would need at least AWG28 for a bare wire in air (free air circulation). insulated wire will carry less because insulation has certain temperature rating that is lower than that that of metal, plus insulation prevents heat exchange so current carying capacity is derated. In general for 1A you would need AWG26 or thicker (AWG24, etc.).
It simply means that the maximum safe operating load on the transformer's secondary is 12VA. The maximum safe operating power this transformer can furnish (12 V)*(1A)*(power factor of load's impedance). Power factor is always equal to or less than 1. Power factor cos [arc tan (XL - XC)/(R)]
It means the transformer secondary voltage is 12 volts and the current rating is 1 amp. If you put a higher current load on the transformer it won't pop, but it will overheat and the insulation will degrade faster than if the current was kept below 1 amp. If the current is allowed to go too high, the transformer will fail in a short time.
