8
M
AINTENANCE
B
YPASS DISTRIBUTION PANEL AND ACCESSORY
USSDHOTSW4
…
INSTALLATION
ATTENTION: the installation must be performed by qualified personnel only.
Example image
(distribution panel for single phase installation)
NOTE 1: The SWIN and SWOUT switches are not mandatory but
recommended, as the wiring connector is protected from direct
contact.
NOTE 2: It is suggested that the mains cable enter from the upper side
of the panel. Fit the cables to exit towards the UPS and the load
on the lower side of the panel.
NOTE 3: Upstream of the distribution panel input line, install the
protection device prescribed in the UPS user manual.
NOTE 4: For sizing of the minimum section of the cables, refer to the
UPS user manual.
NOTE 5: The switches used must have a current capacity greater than
the nominal current of the UPS connected.
WIRING DIAGRAM
DISTRIBUTION PANEL DIAGRAM
INDICATIONS ON THE KIT
CABLES YSDUE03…
L_IN
N_IN
SW_BYP
SW_BYP
L_OUT
N_OUT
EARTH
WARNING: it is essential that terminals SW_BYP of the UPS are connected to the auxiliary contact of
the
SERVICE BYPASS
switch. When the
SERVICE BYPASS
switch closes, this auxiliary contact opens,
indicating to the UPS that the
SERVICE BYPASS
has been inserted. If this connection is not present, power
to the load may be cut off and the UPS may be damaged.
A WARNING LABEL MUST BE AFFIXED ON ALL MAINS POWER DISCONNECTING SWITCHES NOT
INSTALLED NEAR THE UPS AREA, TO REMIND SERVICE PERSONNEL OF THE FACT THAT THE
CIRCUIT IS CONNECTED TO A UPS. THE LABEL MUST CARRY THE FOLLOWING WORDING:
ISOLATE THE UNINTERRUPTIBLE POWER SYSTEM (UPS)
BEFORE WORKING ON THIS CIRCUIT
MAINS
LOAD
TO UPS
