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Most MOVs fail spectacularly - we had one across a 440V line in a test station that went when some idiot lifted the neutral in a junction box. The MOV let out a loud POP, then bluish smoke with the smell of burnt plastic. The MOV was originally the size of a Cigarette pack, but all that was left was tiny pieces attached to the connection terminals, and the metal base. The rest was deposited as soot and plastic around the power input area. Mess...
I had a power strip that got juiced in a storm, and it went out with a long whistle with the charring smell, little smoke. Startled me, for sure. Nothing was plugged in - I was using it earlier as a 24-inch extension cord for my drill to drill a hole in the ceiling near the center of the room.
If it was the fly, some go up in smoke, and some Sharp flys would whistle (RTRNF0038CEZZ - replaced a few of them!). Some big can Electrolytics fail even more spectacularly - had one in an old AN/USM-207 Freq Counter spray tar on the ceiling tiles in the lab (with 12 foot ceilings!!) - I'm sure glad no one was around when it spewed.
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Brian
USN RET 22YRS (Avionics/Cal)
CET-Consumer Repair and Avionics ('88)
"Capacitor Cosmetologist since '79"
When fuses go to work, they quit!
Last edited by Findm-Keepm; 08-28-2015 at 11:16 AM.
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