Siel Safepower-Evo HF 15kVa Manuel D'installation Et D'utilisation page 68

Separate bypass:
if the separate bypass option is present, protective devices must be present on both the main power supply line and the
bypass line.
Note: the neutral of the input line and that of the bypass are commoned inside the equipment, so they must refer to the
same potential. If the two power supplies were different, an isolation transformer would have to be used on one of the
inputs.
UPS without any variation in neutral condition and with separate bypass input (optional)
UPS with separate bypass input (optional) on independent power supply line
UPS with separate bypass input (optional) connected to independent power supply line
IV330 Rev.001 SIEL S.p.A.
Data di emissione: 2011-09-28
connected to independent power supply line
and with galvanic isolation at input
and with galvanic isolation at output
Pag. 68 di 252 + FR