transformers?????

[michael-przybysz]

Few days ago I've decided to fix my spotlights by fitting new transformers.
I bought 6 of them. All designed for 240V and max60 W.
My spotlights have 50 W each. I fitted them all one by one just to find out that all of them are damaged. I mean there is no 12V on secondary ciruit.

Is it possible that something is wrong with the supply??

Michael

 

[plugwash]

are theese real transformers or are they those electronic "transformers" that are so popular for lighting nowadays.

if the latter be aware that the output is sometimes high frequency which may prevent mulitmeters measuring it correctly.

 

[breezer]

why not fit a plug and lamp to one and plug it in? (just to test it)

 

[michael-przybysz]

1)Yes theese are electronic ones. ("IMPACT"). Dimmable.
Is there anything I should know before fitting them??

 

[Space cat]

Few days ago I've decided to fix my spotlights by fitting new transformers.

What was wrong with the spotlights that needed fixing? If they didn't work, how did you conclude that you needed new transformers? Final question: If they didn't work, did they fail one by one or all at once?

 

[michael-przybysz]

They did not work when I turned light on. So I changed bulbs and still nothing. I checked voltage on secondary circuit and I had 0.01V.
One of them is going on and off but there is no visible patern in this behaviour. Voltage on primary circuit 235 V. Someone told me that 9V voltage drop in the system is acceptable.

On the package I can read :
- Tested and oproved to EN1347/EN61547
- Dimmable with resistive and Inductive dimmers (but I have just ordinary switch)
- Soft start to extended Lamp life
- 20 to 60W /VA
-1.5 KW surge protection

They were going down one by one but in no particular order.

 

[Space cat]

They did not work when I turned light on. So I changed bulbs and still nothing. I checked voltage on secondary circuit and I had 0.01V.

So they've never worked. I would start by checking for short circuits on the secondary side. Or maybe that 60W is wft rating (wft = wishful thinking! ) Do you get any volts if you remove the bulbs?

 

[breezer]

some electrocnic transformers only work when there is a load connected (lamp)

 

[Space cat]

some electrocnic transformers only work when there is a load connected

Good point. I forgot about that. Better look for open circuits too.

To get around the double whammy of too much or not enough load current, try testing them with a lower power bulb.