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ELECTRICAL CONNECTIONS
WARNING: a 4-wire three-phase distribution system is required for the three-phase input connection.
The standard version of the UPS must be connected to a TT, TN or IT type 3-phase power line + neutral +
protective earth (PE), in compliance with the IEC 60364-3 specification; therefore phase rotation must be
respected.
Optional TRANSFORMER BOXES are available to convert the distribution system from 3 to 4-wires.
DIAGRAMS OF CONNECTIONS TO THE ELECTRICAL SYSTEM
NOTE: for the following diagrams, in cases of single-phase connections on the input line, instead of 3P=N, please read
P+N.
UPS with no variation of the neutral arrangements
UPS with galvanic isolation on input
Note: For three-phase connections, the transformer must be suitably sized to operate off the bypass
UPS with galvanic isolation on output
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