The discussion about Norway illustrates a lot of the confusion about the
term "IT system". It is very nonspecific. It has many uses, is applied
very differently in various countries and situations, and without more
description, can lead to assumptions about protection and available
voltages which a
To your Question 1:
The items in EN60950 (and IEC950) setting special requirements to
products used in IT-power
systems are:
Cl.1.7.10 The installation instruction shall state that the product is
designed
for connection to an IT-power system.
Cl.2.7.4 For IT-system (System with unearthed neutral
PHILLIP FORD wrote:
>
> We make a product (a disk drive storage sub-system)
> that has TUV approval to EN60950. It uses a power supply
> that is also approved to EN 60950, but neither has been
> evaluated for connection to an IT power system.
>
> The power supply is a Class 1 supply, using protec
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