It's likely a term used to describe the mechanical vibrations that you hear
in a magnetic circuit breaker as the current it is carrying increases past
its trip current.  I've heard this noise, but not the term "Hertz
vibration".  However the name makes sense - the vibration would be at line
frequency.

Jim Eichner, P.Eng.
Group Leader, Engineering Services
Xantrex Technology Inc.
Mobile Markets
phone:  (604) 422-2546
fax:      (604) 420-1591
e-mail:  [email protected]
web:     www.xantrex.com 


-----Original Message-----
From: Electrical-Safety - Bill Addiss
[mailto:[email protected]]
Sent: Monday, August 13, 2001 5:09 PM
To: [email protected]
Subject: Hertz Vibration?



Hello!

Has anyone heard the term "Hertz Vibration" ?
A friend had heard the term in a conversation somehow related to Circuit 
Breakers.
I'm trying to help find the pieces to his puzzle.
If this is a valid term, is there any info/papers on it We could read?

Thanks in advance for any help
Bill Addiss
Electrical Safety Forum
http://www.Electrical-Safety.com


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