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In recent remodeling project, electrician installed TE-12-100 National Specialty Lighting transformer to supply 10 undercabinet "puck" lights. Within 6 months, an "electrical smell" developed when the lights were on, followed in two days by lack of output (checked by me with meter)from transformer. Ordered TE-12-150 as replacement. Checked 120 AC output with meter...OK. Within weeks, same smell and burnout. Any ideas?
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I would check the secondary load to make sure it's not drawing more than the VA rate of the transformer.quote:Originally posted by ggutcher
Any ideas?
Amps X Volts = VA -
Check the lamps for their wattage - Total value add em together and divide by their operating voltage - you'll get the amps. All transformers are rated by VA or (volts-amps) Bigger ones are Kva - thousand volt-amps.
For instance - 12 lamps @ 20 watts each equals 240 watts, operating at 28 volts equals 8.57 amps. - A 10 va transformer should be ok.
12 @ 20w = 240, divided by 12 volts equals 20 amps. A 20 va transformer is suitable.
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