Lighting Transformers 230V/240V

[philparsonage]

I need to replace the lighting transformer in my home, which has, for some reason, given up. It a 240V - 12V transformer, but all I can find in shops is 230V to 11.6V. Obviously the ratios match, but I'm concerned that it'll get too hot if I take it out of its intended operating range. Everything I've seen so far has much larger Tc and Ta numbers that what I have currently. However, there much be an available replacement!

I currently have a DET-65 Dimmable 240V, 50Hz - > 12V eff, Tc = 55, Ta = 40. Does anyone know if a similarly power rated 230V transfomer will do the job, or recommend a suitable replacement?

Regards, Phil

[philparsonage]

I need to replace a lighting transformer in my home, which has, for some reason, given up. It a 240V - 12V transformer, but all I can find in shops is 230V to 11.6V. Obviously the ratios match, but I'm concerned that it'll get too hot if I take it out of its intended operating range. Everything I've seen so far has much larger Tc and Ta numbers that what I have currently. However, there much be an available replacement!

I currently have a DET-65 Dimmable 240V, 50Hz - > 12V eff, Tc = 55, Ta = 40. Does anyone know if a similarly power rated 230V transfomer will do the job, or recommend a suitable replacement?

Regards, Phil

[marvelus]

Tc is case temperature and Ta is ambiant temperature (maximums ).

You've got a 65 watt dimmable electronic transformer I'd replace it with one that matches that description.

[meow2222]

any modern product marked 230v will run fine on our 240v, which is now officially described as 230v, despite being 240.

NT

[Graham]

Well put!

[David Hansen]

On 1 Oct 2006 13:04:06 -0700 someone who may be [e-mail] wrote this:-

It was a bit more than 240V the last time I measured it in my house, though still within the acceptable deviation from 230V at the time. It is just a matter of definition.

BTW, I also have some electrical equipment marked as being for 220V, which runs happily on the same supply.

[James Salisbury]

Are short term jumps to 259.5V suffiennt to get th DNO to fix them?

[philparsonage]

Thanks for the reply, that's exactly what I needed to know.

Phil

[David Hansen]

On Mon, 2 Oct 2006 00:09:17 +0100 someone who may be "James Salisbury" wrote this:-

Check the contract, which usually specifies a voltage range. If it is outwith that range ask your supplier what they are going to do about it. How accurate is your voltmeter and how did you calibrate it?

[djc]

According to my plug in power meter my supply is presently 217 volts, I've been wondering why the lights look dim lately.