Fagor DDS, Hardware Manual

Page: 243 / 386

   Power line connection
POWER LINE CONNECTION
T
ypes of
mai
ns
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. H6/4 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
M
A
INS
FIL
TE
R

A
DI
FF
ER
EN
TI
AL
BREA
KE
R
DIF
FER
EN
TI
A
L
BR
EA
KE
R
MA
IN
S
FILT
ER

A
M
A
INS
FI
LT
ER

A
DIFFE
RENT
IAL
BR
EA
KE
R
FAC
TO
RY LINE
TR
ANS
FO
RM
ER
INFORMATION. TN type mains are the only ones to which the DDS sys-
tem can be connected either directly or through an auto-transformer.
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