Riello UPS CSS sentryum CBM User Manual

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ELECTRICAL CONNECTIONS (CBT)
WARNING: a 4-wire three-phase distribution system is required.
The CSS must be connected to a power supply source providing 3-phase + neutral + PE (protective earth) of a TT, TN
or IT type. The phase rotation must be correct.
In the IT system a 4-pole thermal-magnetic circuit breaker is mandatory.
Optional TRANSFORMER BOXES to convert the distribution systems from 3-wire to 4-wire are available upon request.
WIRING DIAGRAMS FOR CONNECTING TO THE ELECTRICAL SYSTEM
CSS w/o any variation in the neutral condition CSS with galvanic isolation at the output
CSS with galvanic isolation at the input
* LVS: low voltage source
Table 10
Protective devices must be present on both the main input supply and the bypass supply.
Note: the neutral of the input and the bypass supplies are connected together inside the equipment, therefore they must be referenced
to the same potential. If the two power supplies are different, an isolation transformer has to be used on either of the two inputs.
CSS with galvanic isolation
CSS with galvanic isolation at the input CSS with galvanic isolation at the Bypass input
* LVS1: low voltage source 1; LVS2: low voltage source 2;
Table 11

Riello UPS CSS sentryum CBM Specifications

General

Brand	Riello UPS
Model	CSS sentryum CBM
Category	Power Supply
Language	English