gards,
Date sent: Thu, 22 Oct 1998 14:47:40 -0400
From: Edward Eszlari
Subject: RE: isolation of battery (72V max) input
To: "INTERNET:mvald...@netvision.net.il"
,
t...@world.std.com, emc-p...@ieee.or
Moshe,
The answer to your question is Reinforced insulation for the working
voltage measured in that location.
The 72V supply is considered hazardous voltage and if an SELV circuit is
present on conductors nearby, this is the type of insulation system that is
required. If this "CO like" envirome
--- Forwarded Message Follows ---
From: Self
To: emc-p...@ieee.org, t...@world.std.com,
mvald...@netvision.net.il
Subject:Re: isolation of battery (72V max) input from SELV
Circuits
Date sent: Wed, 21 Oct 1998 23:11:48
Dear Moshe,
I assume you mean creepages and clearances between input
circuits and SELV circuits (and not conductors). I am also
assuming you are familiar with the clearance and creepage Tables
in UL1950 and/or EN 60950 which depends on the Installation
Category and Pollution Degree.
In regar
Moshe:
We treat the 48V input as a secondary voltage with primary voltage
rules. Therefore, you will have to hold to the _reinforced_ distances
for creepage and clearance.
Regards,
John R. Kretsch, P.E.
Compliance Engineering Supervisor
ADC Broadband Communications
john_kret...@adc.com
-O
5 matches
Mail list logo
