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pcb failed ul dielectric test on power connectors

H

hartman1

Jan 1, 1970
0
can anyone recomend what I should do to fix the following,
I have designed a pcb which uses 12-16VAC input and have a common ground
connected on the neg side of power diodes, my panel has failed 1000vac
dielectrical test between ground and ac connector. Im told this is
because i connected directly on other side of diodes, how can I fix this??
 
T

TimPerry

Jan 1, 1970
0
hartman1 said:
can anyone recomend what I should do to fix the following,
I have designed a pcb which uses 12-16VAC input and have a common ground
connected on the neg side of power diodes, my panel has failed 1000vac
dielectrical test between ground and ac connector. Im told this is
because i connected directly on other side of diodes, how can I fix this??


if i understand you correctly, you are testing between either of the
transformer primary connections and ground.

nothing on the secondary side of the transformer should have any bearing or
effect on this test. use a transformer with better primary to secondary
isolation.
 
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