Ups Connections; Modifications Reserved - ABB DPA UPScale ST40 User Manual

5.4 UPS connections

The customer has to supply the wiring to connect the UPS to the local power source (see chapter
5.7). The electrical installation procedure is described in the following text. The installation inspection
and initial start-up of the UPS and extra battery cabinet must be carried out by qualified service
personnel, such as a licensed service engineer from the manufacturer or from an agent certified by
the manufacturer.
THE INSTRUCTIONS IN THIS USER MANUAL HAVE TO BE FOLLOWED
ALWAYS IN ORDER TO AVOID INJURIES FROM ELECTRICAL SHOCK.
WARNING!
ALL THE OPERATIONS DESCRIBED IN THIS MANUAL MUST BE
PERFORMED BY CERTIFIED ELECTRICIANS OR BY QUALIFIED INTERNAL
PERSONNEL.
DO NOT OPERATE IF WATER OR MOISTURE IS PRESENT.
BY OPENING OR REMOVING THE UPS COVERS YOU RUN THE RISK OF
EXPOSURE TO DANGEROUS VOLTAGES.
PHYSICAL INJURY OR DEATH MAY FOLLOW, OR DAMAGE MAY OCCUR
WARNING!
TO THE UPS OR THE LOAD EQUIPMENT IF THESE INSTRUCTIONS ARE
IGNORED.
To ensure correct operation of the UPS and its ancillary equipment, it is necessary to provide the
mains cables with appropriate fuse protection. See chapter 5.7.1.
The UPS unit has the following power connections:
Rectifier (In) : Three-phase (1L1, 1L2, 1L3), Neutral (1N) and protective earth (PE)
connection for the rectifier input
Bypass (In) : Three-phase (2L1, 2L2, 2L3), Neutral (2N)
connection for the bypass if used as Dual Feed input
Load (Out) : Three-phase (3L1, 3L2, 3L3), Neutral (3N) and protective earth (PE)
connection for the load output
External Battery : Plus (+), Common (N), Minus (-) and protective earth (PE)
connection for the external batteries
INPUT NEUTRAL IS REQUIRED TO OPERATE THE RECTIFIER.
In TN-S Systems, no 4-pole input switches or circuit breakers should be used. If you
have to use a 4-pole switch for another reason, you have to be aware that, when open,
the system - UPS and all downstream equipment - are floating against the PE.
IMPORTANT
NOTE

Modifications reserved

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Fig 5.4-1: Input neutral