Power line connection
POWER LINE CONNECTION
Types of mains
6.
243
DDS
HARDWARE
Ref.1310
TN type mains
Distribution diagram that has a point connected directly to ground. The
conductive parts of the installation are connected to this point through
ground protection wires. This type of mains admits loads between one or
several phases and the neuter.
There are three types of TN systems depending on the protection neuter
and ground combination:
TN-S diagram where the neuter and the ground protection conduc-
tors are separated throughout the whole length of the system.
TN-C-S diagram where the neuter and the ground protection wire are
combined in a single conductor somewhere in the system.
TN-C diagram where the neuter and the ground protection functions
are combined in a single conductor throughout the system.
See diagram of figure
F. H 6/ 4 for properly installing the DDS system with
TN-C type mains distribution.
F. H6/4
Installation diagram in TN-C type mains.
DDS
L1
L2
L3
PEN
DDS
DDS
MAINS
FILTER
A
DIFFERENTIAL
BREAKER
DIFFERENTIAL
BREAKER
MAINS
FILTER
A
MAINS
FILTER
A
DIFFERENTIAL
BREAKER
FACTORY LINE
TRANSFORMER
INFORMATION. TN type mains are the only ones to which the DDS sys-
tem can be connected either directly or through an auto-transformer.