E
LECTRICAL
C
ONNECTIONS
WARNING: a 4-wire three-phase distribution system is required for the three-phase input connection.
The
UPS must be connected to a power supply line made up of 3 n PE (protective earth) of TT, TN or IT
type. Therefore, the phase rotation must be respected.
Optional TRANSFORMER BOXES to convert the distribution systems from 3 wires to 4 wires are available.
W
IRING DIAGRAMS FOR
C
ONNECTING TO THE
E
LECTRICAL
S
YSTEM
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
