Pinpointing Insulation Failures in Coil
Pinpointing Insulation Failures in Coil
(OP)
Can you provide any way to pinpoint the location in a coil where the turn to turn short is occurring. This coil is a 12ohm automotive (12V system) coil (0.140 diameter wire). I've read about Surge testing but it seems to only indicate the presence of a turn to turn short but does not have the ability to identifiy the exact location. Thanks.





RE: Pinpointing Insulation Failures in Coil
All you said is valid.The surge test would not apply itself very well to an automotive ignition coil.
As for telling where the short is located I don't think you find an instrument to do that very easely.
I don't know what you plan on doing after you find the short.If you plan on repairing the coil,it is not impossible to do it, but it might be cheaper to buy a new one.If you cut one of this things open,I believe you probably will know what I mean on buying a new coil.They are messy.
GusD
RE: Pinpointing Insulation Failures in Coil
RE: Pinpointing Insulation Failures in Coil
RE: Pinpointing Insulation Failures in Coil
RE: Pinpointing Insulation Failures in Coil
Can you test the coil with AC?
It may be possible to use a DC clip on ammeter to determine which part of the coil is shorted? (low magnetic field)
RE: Pinpointing Insulation Failures in Coil
RE: Pinpointing Insulation Failures in Coil
http://www.thomasregister.com
and type Reflectometers under Product or Service, which will return 30 companies to approach to. Skip optical reflectometers.
RE: Pinpointing Insulation Failures in Coil
They usually need to know what type of cable in terms of C and L in order to determine distance, or have a set of curves pre-plotted for different cable constructions. Do you have a good coil to compare against which you might compare the damaged one?