Variable Frequency Drives: failures & contamination
Variable Frequency Drives: failures & contamination
(OP)
I work for a chemical plant with an inherently corrosive atmosphere. I have a large base of new technology (4 years oldest)VFD's. Over the past year we experienced an abnormally high rate of failures, mostly related no non-power elements (gate driver boards, rectifier drives boards comms cards etc..)
At first earthing was suspected as a possible problem, but contamination/corrosion are emerging as the biggest suspect.
Now, the cards are coated except for one place: where IC's/microchips fit into sockets. Our main sources of contamination are sulphur and ammonia related chemicals.
Can one coat these as well to prevent corrosion, and with what?
At first earthing was suspected as a possible problem, but contamination/corrosion are emerging as the biggest suspect.
Now, the cards are coated except for one place: where IC's/microchips fit into sockets. Our main sources of contamination are sulphur and ammonia related chemicals.
Can one coat these as well to prevent corrosion, and with what?





RE: Variable Frequency Drives: failures & contamination
RE: Variable Frequency Drives: failures & contamination
we used a sterling 009-0008 anti fungal-anti tracking spay on air dry varnish.we understand dolph also produce a spray on air dry varnish.
kind regds.