On 1/23/2014 10:02 AM, Carl wrote:
Inductive industrial equipment use big MOV's for spike suppression on
single and 3 phase lines of many voltages.
Again, the problem comes with interconnected equipment when the MOV
dumps the spike onto ground. Won't repeat previous email. :)
I use a pair of large Littlefuse MOV's as a whole house limiter and
right at the main panel.
That's an excellent application.
Lines that are used with electronics when on generator power are also
treated with MOV's and .01/2KV buffer rated disc caps.
Some things that are common practice are bad practice. Like "The Pin One
Problem" -- cable shields that go to a circuit board rather than to the
shielding enclosure. Like power cords whose green wire goes to the
mounting lug of a terminal strip that is insulated from the chassis by
paint. I'm sure you can cite plenty more examples. :)
73, Jim K9YC
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
|