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American
Electrical, Inc.
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Industrial
Electrical Components
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Date: March 7, 2016
REF: New American Electrical, Inc. Fuse Holder
Do
you or your customers use Class CC (rejection type) fuses in our Fuse
Holders? If so please read the following
letter.
The
254 Series and the 256 Series are being upgraded. The old 254 – VLC – is changing to the EFD
Series (still 254 prefix). The change will
allow for 10x38mm and 1 ½”x13/32” OR Class CC fuses. The Old version 254 series allowed for Class
CC and 10x38mm and 1 ½’x 13/32” in the same holder.
The
problem is that Class CC fuses operate at higher Interrupt Current and higher
quality – if a Class CC design (such as an Elevator circuit) were to be
compromised by someone placing a non-Class CC fuse in the holder, the system
would be operating below design standards – this is not a good situation.
Now
you and your customers will have to choose the Class CC version OR the 10x38mm/
1 1/2'”x 13/32” – The Class CC versions WILL NOT ALLOW anything other than a
Class CC into the Holder. This will
improve design and operational safety.
The
256 Series is being upgraded from the VLC to the EFD as explained below.
The
new changes in the EFD series also allow for an easier way to open the fuse
blocks, offer complete IP 20 protection, a better mechanism for attaching to
the DIN Rail, the possibility to lock-out the device in open or closed
positions as well as the complete separation for Class CC designs as described
above. This new Series, called EFD, will
replace the VLC but will have the same dimensions as the VLC – so there is no
need to worry about the physical placement of the new Fuse Holders.
So,
with these changes, you will have to ask your customer “Will you be using Class CC fuses in
your application?”
In the post above, you will see a table with a breakdown of what you need to know. If you have any questions please call us at
804 379-2899. Thanks for your business!
Tom
Thomas A. McCormick
President
American Electrical, Inc.
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