outback breakers [RE-wrenches]

David Nixon david.nixon at arisetech.com
Thu Feb 24 08:50:52 PST 2005


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Just a point of intrest on CBI breakers.
CBI breakers are made in South Africa, and as such have a european 
electrical heritage. Therefore the screw terminal is of the "Posi drive" 
design. This is very similar to a Philips drive. The reaction of most 
peolple to "posi" is it is just a slopy fit and generaly a philips 
screwdriver will do. I used to work in a panel shop (IBEW) where we used 
posidrive screwdrivers exclusively on all European electrical equipment, 
they work very well.To Identify a posi screw look for four small dots or 
score marks radiating from the centre of the screw between the cross of 
the "philips". The best driver is a "Weidmuller" 900854 PZ2, a close 
second is the "Cresent" tools PZD2. Also look out for these screws on 
"ABB" breakers used in european inverters and in other high voltage 
applications.

David Nixon

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