On Oct 09, 1996 at 00:24 hrs, Poe Lim of 3:623/630 wrote to John Clarke:

G'day Poe,

I changed the subject line to something more appropriate.

JC>> Perhaps the best arrangement is to also include a series fuse that
JC>> blows when the arrestor operates.  This way you know when the
JC>> arrestor has fired since the equipment won't work until the fuse is
JC>> replaced.  At the same time the arrestor/zener combination could be
JC>> checked to see if healthy and replaced. 

 PL> Anything like that available? Or even the first, without the second.

Sure.  If you have a Telstra box on the wall containing one or two Krone
insulation displacement strips you can get a magazine equipped with up to
10 arrestors that plugs into the Krone strip.  I think Critec make
something similar.  These should be familiar items to exchange installers. 
You will need to have an Austel licensed electrician install the earth
connection.

What you need is a 3 pole arrestor.  These have a common chamber so that
both legs are grounded at the same time.  Don't get two independent
arrestors - we found that one fires grounding one line changing the
situation from each line having a voltage to earth to one where the voltage
appears across the two lines.  Exit one device usually.

Regards ... John
@EOT:

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