I have a 240 to 12 volt electronic transformer for each 50w halogen bulb. Trying to track down a fault, I tested the transformer with my multimeter - it showed 240v input but showed zero v output so I concluded that the transformer was faulty BUT when I plugged in a bulb it lit up normally. Can anyone explain ??
Transformers have a generic winding and a secondary winding. they are wound with a ratio in recommendations. The ratio is the secondary divided by skill of the common. occasion: a generic winding of one hundred turns and a secondary with 10 and a hundred and twenty volts on the common : a hundred and twenty * (10/one hundred) 12. this might grant the needed output voltage needed. some transformers have distinctive faucets so which you would be able to get distinctive voltages from the a number of connections. in case you're desiring greater effective than 3.9 volts, you will be able to desire to purchase one which has the splendid voltage.
Different kind of voltage. Did you switch your multimeter to read DC voltage? Most lighting ballasts are ac output (like fluorescent or metal halide). In the case of mr16 50w light bulbs typically power is 12v dc output from either an electronic or magnetic transformer. Magnetic is heavy iron with copper wound like a typical door bell transformer. Electronic is smaller and lighter using circuit boards to convert the voltage. In both cases it will be DC. Something else to consider is worn contacts where the bulb connects. And m16 bulbs don't last very long. Oil from your hands will shorten their lifespan even more. Also poor heat dissipation through the fixture. I've worked with a lot of the types of fixture you're speaking of. (usually 4 recessed cans but also pendants and track fixtures)
