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Tullos Guest
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I was recommmend to use ferric chokes. |
Posted: Mon Aug 09, 2004 11:31 am |
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Here is his exact quote.
"The solid state relays may be less sensitive to this EMI. But we need to employ MOVs and appropriate ferric chokes to reduce this further."
What is a ferric choke? It doesnt come up in google.
Many thanks. |
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Mark
Joined: 07 Sep 2003 Posts: 2838 Location: Atlanta, GA
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Posted: Mon Aug 09, 2004 11:38 am |
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ferrite choke |
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Tullos Guest
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Posted: Mon Aug 09, 2004 12:21 pm |
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Can I use a universal ferrite choke on an AC line going to a solid state relay that will turn on a motor AC? I'm trying to protect the solid state relay. Also, I was thinking about adding a 240v MOV. Do these combination sound good? Am I way off track?
http://www.ferrishield.com/html/round5.html#BC28B1251 is the specific one I was looking at.
I still dont quite understand the A B C D colums on the datasheet.
Many Thanks |
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Humberto
Joined: 08 Sep 2003 Posts: 1215 Location: Buenos Aires, La Reina del Plata
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Posted: Mon Aug 09, 2004 2:42 pm |
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Hi Tullos,
A,B,C and D columns reffer to phisical dimentions mark of the ferrites according to the drawing, expressed in inches (black colour) and milimeters (red colour)
Humberto |
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Humberto
Joined: 08 Sep 2003 Posts: 1215 Location: Buenos Aires, La Reina del Plata
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Posted: Mon Aug 09, 2004 2:52 pm |
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Tullos wrote:
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Also, I was thinking about adding a 240v MOV. Do these combination sound good? Am I way off track?
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Yes, you are on track! I had used them in a project several years ago. I didnīt know the criteria regarding zise/turns in the referenced ferrites, but itīs a matter of test and error (+ patience) and a good scope to analize how you can attenuate the generated transient glitches.
Best wishes,
Humberto |
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