Eaton 9155 N - Electrical Installation

14 8-10 kVA, 50/60 Hz (1-phase input) &
8-15 kVA, 50/60 Hz (3-phase input)
P-164000341
User's Guide Revision 1
6 Electrical installation
The customer has to supply the wiring to connect the UPS to the local power source. The electrical
installation procedure is described in the following text. The installation inspection and initial start up
of the UPS and extra battery cabinet shall be carried out by a qualified engineer with UPS installation
experience.
WARNING
Physical injury or death may follow, or damage may occur to the UPS, or the load equipment if
these instructions are ignored.
The UPS unit has the following power connections:
Rectifier input:
• Three-phase (L1, L2, L3) and protective earth (PE) connection
• Single-phase (L1) and protective earth (PE) connection. Neutral (N) has isolated connection point
and Neutral from the bypass input is used in the rectifier. N can work also as L2.
Bypass input:
• Three-phase (L1, L2, L3), Neutral (N) and protective earth (PE)
• Single-phase (L1), Neutral (N) and protective earth (PE) connection. N can work also as L2.
Load output:
• Three-phase (L1, L2, L3), Neutral (N) and protective earth (PE) connection
• Single-phase (L1), Neutral (N) and protective earth (PE) connection. N can work also as L2.
Battery:
• Plus (+), minus (-) and protective earth (PE) connection for the external batteries.
NOTE
The rectifier requires a Neutral (midpoint) to operate. It’s connected internally from the bypass
terminal to the rectifier, see wiring diagrams later in this chapter.
NOTE
Care needs to be taken to ensure that the input supply neutral reference is not disconnected
whilst the UPS is in service.