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LED Transformer not working properly?
Hi everyone, i hope you can help here.
On site on friday two of our men were installing a set of built up letters with LEDs. One of the guys however made a pretty big mistake. He "accidently" wired the LED transformer the wrong way round, with the mains input going to the output leads on the transformer. This of course blew the transformer, and the trip in the whole store. As our supplier wasnt too far away, they drove up and got a new transformer, exactly the same as the first one. However when this transformer was wired in, the LEDs are now pulsing on and off with a two second break. There are 58 LEDs running of a 2A transformer. My question is would it be the transformer blowing that has damaged the LEDs and is causing the pulsing, or would two transformers differ ever so slightly that one of them couldnt quite manage the LED load, as the little 2A transformer is only supposed to run 60 LEDs, so it is more or less at its limit. Again all help appreciated. -
8 Replies
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Best to speak to your supplier on that one.
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LED’s tend to work or not so it’s highly unlikely that they were damaged- sounds like the overload trip keeps cutting out & resetting. (strange that it’s so predictable in the timing though)
Get a multimeter & test the current flowing through the system*. It is possible that the transformers are more than capable at running 60 LEDS at a particular current or a particular type, but yours may be drawing more curent than the type the transformer is rated for.
Would be my first thing to check anyway.
*Incase you are not familiar with taking electrical readings – Ameters MUST be connected inline so current flows THROUGH them. Not like Volmeters where voltage is measured OVER a system.
Dave
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Il try that David, Gotta go there tomorrow morning, ill talk to the onsite spark.
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Whatever happened to something reliable?????? 😥
LIKE A NEON SIGN!!!!! :lol1: :lol1: :lol1:
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quote David Rogers:LED’s tend to work or not so it’s highly unlikely that they were damaged- sounds like the overload trip keeps cutting out & resetting. (strange that it’s so predictable in the timing though)Get a multimeter & test the current flowing through the system*. It is possible that the transformers are more than capable at running 60 LEDS at a particular current or a particular type, but yours may be drawing more curent than the type the transformer is rated for.
Would be my first thing to check anyway.
*Incase you are not familiar with taking electrical readings – Ameters MUST be connected inline so current flows THROUGH them. Not like Volmeters where voltage is measured OVER a system.
not quite dave,
to measure amps the device dosnt even need to be connected to the circuit A proximity device either encloses the cable or is put next to it to measure amps.
PeterDave
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You could just unplug some of the leds and see if that stops it flashing if its a loading problem.
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quote Peter Normington:not quite dave,
to measure amps the device dosnt even need to be connected to the circuit A proximity device either encloses the cable or is put next to it to measure amps.
PeterAgreed, if he has a clamp-on / induction meter then he won’t, but as MOST people with a £10 multimeter are a little unsure as how to do anything except measure voltage nevermind current I thought I play it safe & give a little general advice on ammeter connection to stop it blowing up in their face.
Besides, most people don’t have a clamp-on meter in their toolbox, (they are a very handy tool though), no offence, but the majortity of people that see one for the first time think it’s some sort of wierd electrical torture implement.Nick’s ideas seems a good one though…the elegance of logical thought!!
Dave
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Hi everyone,
I dont know that much about electrics, and on friday night I went up to try and remove some leds, but they are fixed to the fascia with little 5mm rods that are then tightened up with a nut on either side of the panel, and trying to remove the letters without taking down the whole fascia was going to be a nightmare.
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