Dimensioning clearance and
creepage distances:
400 applies to:
phase conductor–phase conductor
250 applies to:
phase conductor–N-conductor
phase conductor–PE conductor
N-conductor–PE conductor
Test-disconnect terminals
Test-disconnect terminals are used
for the short-term separation of
circuits order perform test and
measurements no-voltage state. connected a
neutral-conductor busbar.
They are covered the scope the
IEC 60947-7-1 (Appendix D). covered
by the scope the IEC 60947-7-1
(Appendix D).
The dimensions for the clearance
and creepage distances the
opened disconnect points are not
evaluated. However the rated surge
voltage resistance (supplied the
manufacturer) must verified the
opened disconnect point. They enable simple
testing without the need disconnect
the neutral conductor.Definitions the various types
N-conductor disconnect terminals
A neutral-conductor disconnect
terminal special type test-
disconnect terminal with lateral
disconnection.
NT
W
Technicalappendix
W.51282250000 2012/2013
