P-164000341 8-10 kVA, 50/60 Hz (1-phase input) &
8-15 kVA, 50/60 Hz (3-phase input)
15
Revision 1 User's Guide
6.1 Power cables and protective fuses
Always use copper cable types to fit terminals with approximately 1.5 Nm torque for different load
currents. The Cu cable sizing is based on multi-core cables laid in conduits/trunkings on the wall or on
the floor (installation procedure C), ambient temperature 25°C, PVC insulation, surface temperature
up to 70°C. Cables of several UPS can be installed in parallel to each other.
Standards SFS 6000-5-52 (2002) and IEC 60364-5-52 (2001-08) “Electrical installations of buildings”
with normal 1.7 x Neutral conductor rating for IT loads are used as a sizing guide. For any other
conditions, size the cables according to the local safety regulations regarding installation environment,
appropriate voltage and currents of the UPS.
Fuses are sized according to local safety regulations, appropriate input voltage and the rated current
of the UPS. Therefore, protect the input and bypass cables with gG (gL) fuses or B-C-D type of circuit
breakers against overload and short-circuit.
Contact the manufacturer’s authorised agent or the local office for assistance at fuse and cable sizing.
Refer to the recommended cable and fuse ratings in the tables presented with the wiring diagrams.
6.2 Wiring procedure
Depending on the model the power cable terminals can be located either in the back of the UPS
unit, in the front of the factory installed transformer or on top in Type Approved (TA) models. The
qualified engineer is responsible for the correct electrical installation. They must be authorised by the
manufacturer.
To Next Page
Loading...
