Output Connections; Load Connection - ABB DPA UPScale ST40 User Manual

For minimum recommended input cable sections and fuse ratings refer to chapter 5.7.1.
Under the UPS connection terminal there is a cable-fixing rail to facilitate the proper fastening of the
cables.

5.4.2 Output connections

Before you start connecting the loads, ensure that the sum of the indicated UPS module rated
powers (OUTPUT POWER) on the nameplates (on "the front side" of the UPS modules) the side is
equal to or larger than the total load requirements.
The output of the UPS must be fitted with circuit breakers or some other kind of protection. These
circuit breakers should be connected between the loads and the UPS and will provide additional
protection to the UPS in the event of overloads and short circuits.
These circuit breaker will enable the protection of each load separately and shall isolate all poles.
The size of the circuit breakers depends on the load rating of the load sockets.
The circuit breakers must comply with the prescribed IEC Standards. It is recommended to provide a
separate output distribution board for the load. The following values should be indicated on the output
distribution board:
-
Maximum total load rating
-
Maximum load rating of the load sockets
If a common distribution board is used (sockets for mains and UPS voltage), ensure that on each
socket there is an indication of the applied voltage ("mains" or "UPS").
Output power cable ratings should be in accordance with the recommended cable sections and fuse
ratings or in accordance with the prescribed IEC standards or with the local regulations.
Under the connection terminal of the UPS there is a cable-fixing rail to facilitate the proper fastening of
the cables.
Ensure that the earthing is performed in accordance with the prescribed IEC standards or with the
local regulations.

5.4.2.1 Load connection

To ensure protection of personnel during the installation of the UPS make sure that the connections
are performed under the following conditions:
-
No mains voltage is present
-
All loads are shut down and disconnected
-
PMC is shut down and voltage-free
Before connecting the output power cables make sure that:
-
The UPS module is fitted in its correct position
-
The maintenance bypass is in the OFF position
- The terminal cover of the UPS is removed
The output power cable coming from the LV distribution board is connected to the terminals of the
UPS.
Modifications reserved
Page 31/79