Siemens SENTRON 3KF SITOR Manual page 72

Further accessories
8.2 Additional poles
4th contact element
An additional pole with a switching function is identical to the poles mounted on the 3KF. It
can be installed to upgrade a 3-pole 3KF switch disconnector to a 4-pole switch disconnector
if the N conductor is to be connected.
N/PE terminal
Additional pole without switching functionality, with fixed connection between the upper and
lower terminal of the pole. With the N/PE terminal, the 3KF has a further connection
possibility for the N or PE conductor.
N terminal
Additional pole without switching functionality, with connection between the upper and lower
terminal of the pole. The connection between the terminals can be opened by removing the
jumper. With the N terminal, the 3KF has a further connection possibility for the N conductor
if N is to be disconnected (e.g. for maintenance) but must not be switched.
Auxiliary switch module (size 1)
Used to mount auxiliary switches on 3KF switch disconnectors of size 1.
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3KF switch disconnectors with fuses
Manual, 09/2019, L1V30580914002A-01