lighting transformers

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ABC Technical

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Depends if you get 50w bulbs that are the correct voltage for that tranny, if you do yes, why not?

 

Theorysparky

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Trouble is i have 40 downlighters in an opticians display cabinets

the transformers are knackered so im just looking for the cheapest option

 
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Trouble is i have 40 downlighters in an opticians display cabinetsthe transformers are knackered so im just looking for the cheapest option
Yes, they will mate; but I tend to find with these tx`s (they`re made by varilight / Doyle & Tratt; really good units.) that they don`t particularly like being fully loaded. They work; but the lifespan can be affected. The only way I`ve done a similar job was by having a forced air cooling fan for the tx`s.

HTH

KME

 
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Personally I don't like fully loading any transformer...

just have that feeling in me water!

Just not sure how accurate some manufactures tolerances are!

what if a batch of bulbs are a bit over there rating....

& the transformer is below its rating....

pop/fizz/bang!!

I don't think I have ever wired more that three bulbs onto one transformer?

In your particular case I may be pushed to got to 4 per trany!

still leave a 50watt output -> load buffer! :)

 

Theorysparky

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Yes, they will mate; but I tend to find with these tx`s (they`re made by varilight / Doyle & Tratt; really good units.) that they don`t particularly like being fully loaded. They work; but the lifespan can be affected. The only way I`ve done a similar job was by having a forced air cooling fan for the tx`s.HTH

KME
Thats a good point to bear in mind

but they are not covered so may get away with it.

funny thing was they were having a problem with the heat from the lamps melting the glasses.......so what did they do

put a glass shelf between the two

and that was in an opticians :eek: :O

 
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Trouble is i have 40 downlighters in an opticians display cabinetsthe transformers are knackered so im just looking for the:D
A couple o thoughts just drifted across my beer soaked brain.....

How many transformers are there at the moment? ?:|

why are they knackered? ?:|

that may help you make your decision m8!

 

Theorysparky

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there are 7 at the moment,,,,the large old brick type not the slim ones

i tested all the outputs that had blown bulbs no output

i think they have been overloaded with 75w bulbs

they are all spread over 4 displays and they all rattle !!!

the whole set up is a mess its one of those jobs you want to rip it to bits and start over

 
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Then that`s what I`d be STRONGLY suggesting mate.I`d go with spec. here, and put 4 lamps to a 250.
I hope your not tying to push the blame to me if it still goes..

POP/FIZZ/BANG!!!!! :_|

I shall deny it... :eek:

and if not I shall blame welshy cuz he is cutting back on me medication!X( X(

 

Mr Sworld

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i think they have been overloaded with 75w bulbs
Good God! Now wonder the glasses were melting! I'd put money on it that they were the aluminium reflectors not the dichroics too! :^O

 
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