Discuss The dark loft. in the UK Electrical Forum area at ElectriciansForums.net

I only used floris originally as the wholesaler was flogging them off cheap as LEDs were a much higher price back then🤣🤣
 
What's the temperatures like in the loft. I had some that blew once when starting up from very cold. Could of just been coincidence though
 
What's the temperatures like in the loft. I had some that blew once when starting up from very cold. Could of just been coincidence though
It is very cold in the winter and by the time the tube gases had stopped swirling and got to temperature I had done what I needed to do up there.
 
give pete999 a ring. he's in northampton and loves climbing into attics. ☹️☹️☹️
 
https://www.researchgate.net/figure...ration-employed-in-most-of-the_fig1_261095054

It may be that the electrolytic capacitors in the electronic ballast needed reforming after a long period without being energised. Over time the oxide layer which provides some necessary insulation in the aluminimum-electrolyte rolled sandwich becomes thinner and thence unable to withstand the operating potential difference between anode and cathode. See:

Electrolytic Capacitor | Types | Capacitor Guide - https://eepower.com/capacitor-guide/types/electrolytic-capacitor/#

Upon applying power then after a long period these capacitors, especially the smoothing capacitor act like a low resistance and a large current flows; IsquaredR - in a small space equals rapid heating and a pop.

As an example here are some instructions for an ABB electronic motor drives which have not been used for a while:

https://library.e.abb.com/public/79...892e4/Guide_for_capacitor_reforming_Rev_G.pdf
 

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