21 Apr
2001
21 Apr
'01
7:04 a.m.
On 21 Apr, Clint Wolff (VAX collector) wrote:
Protective ground is NOT identical to N, even if they
are wired together
at the main breaker panel (as in USA). [...]
I know, it is the same in Germany. The
statement "Protective ground is
identical to N." was only a simplification to illustrate why you
messure the same voltage from a phase to N and from a phase to
protective ground. I wanted to describe how three phase power works,
not how failure protection works and what different kinds of power
network types (TN-C, TN-S, TN-CS, TT, IT or how they are called in the
USA) are possible.
--
tschuess,
Jochen
Homepage: http://www.unixag-kl.fh-kl.de/~jkunz