IV405E Rev.000 SIEL S.p.A.
Data di emissione: 2018-06-22
Pag. 13 di 50 + FR
3.7 Power cable connect
Once the equipment has been finally positioned and secured, connect the power cables as
described in the following procedure.
Verify the UPS is totally isolated from its external power source and also all power isolators of the
UPS are open. Check to see if they are electrically isolated, and post any necessary warning signs to
prevent their inadvertent operation.
Remove the cover of terminals for wiring easily.
Terminal sequence from left to right: Input phase A(L1), bypass phase A(L1), input phase
B(L2), bypass phase B(L2), input phase C(L3), bypass phase C(L3), input Neutral line, bypass
Neutral line, output phase A(L1), output phase B(L2), output phase C(L3), output and battery
Neutral line, battery positive, battery negative. There are 3 connectors of GROUND under the
terminal block.
Warning
In the case of “split bypass” operation,
make sure the copper wire
between each input lines have been removed. The AC input and the
AC bypass supplies must be referenced to the same neutral point.
Choose appropriate power cable. (Refer to the table above) and pay attention to the
diameter of the connection terminal of the cable that should be greater than or equal to that of
the connection poles;