there are a lot of relays available that work on 110Avc and can switch 220v ac.it would be more easy to answer if you specified the voltage that is going to switch it.
there are a lot of relays available that work on 110Avc and can switch 220v ac.it would be more easy to answer if you specified the voltage that is going to switch it.
I have a device wich has a terminal barrier where I connect the 110v pair. The other terminals are to connect the light bulbs - when a certain switch is turned on - through the already existing relays the bulbs lighten on. What I want to do is avoid the use of 110v and replace them with low Vac to trigger an outside relay - instead of bulbs - and then place the bulbs. What relay should I use for this purpose?
I have a device wich has a terminal barrier where I connect the 110v pair. The other terminals are to connect the light bulbs - when a certain switch is turned on - through the already existing relays the bulbs lighten on. What I want to do is avoid the use of 110v and replace them with low Vac to trigger an outside relay - instead of bulbs - and then place the bulbs. What relay should I use for this purpose?
But
first check that the 30 V source can put out enough power for the 220 V bulb,
and
if the bulb does not pull rated output current from the transformer the voltage will climb above 220 V
and
then incand. lamp life of a 220 V bulb at 250 V = (100%)(220/250)^12 = ~20% of normal. Brightness will be 100%(250/220)^(3.5) = ~160%.
a stepup Xformer would work as advised by many if you have got enough power in your source(thanks willbe).i said relay because i thought that a 220v lamp means a 220v mains and that would be feasible to use with a relay cause he can get 220v easily!
I found an easier way... I got an old 220-10v ac/ac transformer and hooked it to the relays. I joined 4 leds in series and connected them as I would do with the light bulbs. It worked fine!
if the bulb does not pull rated output current from the transformer the voltage will climb above 220 V
and
then incand. lamp life of a 220 V bulb at 250 V = (100%)(220/250)^12 = ~20% of normal. Brightness will be 100%(250/220)^(3.5) = ~160%.
If it's a 220V mains transformer being used in reverse, that won't happen.
The voltage will be lower than the rated primary voltage. For example I have a 230V to 230V isolation transformer. When 230V is connected to the primary, the secondary voltage is about 250V but when 230V is connected to the secondary, the output voltage is just 210V. I haven't tried operating the transformer with a load in reverse but I think the output voltage will drop to around 190V.
If he wants the transformer to outpur 220V when connected to a 30V load, then he needs to use a transformer that outputs just under 30V when unloaded, a 24V transformer will probably do the job.
250/230 = 1.087
230/210 = 1.095
If you only consider two significant figures (1.1) these numbers are equal. So far, no blatant violation of the laws of physics.
So, what I said is true half the time!? Those odds are lousy. If this keeps up I"ll have to run for political office. . .
That's true, isolation transformers normally have more turns on the secondary than primary so the secondary voltage approximately equals the primary voltage at full load.
In this case the turns ratio is 1:1.1.
You might think a 240V to 24V transformer would have a turns ratio of 10:1 but it doesn't, it more likely to be 10:1.1.