IV404E Rev.000 SIEL S.p.A.
Issue date: 2017-06-05 Pag. 21 di 90 + FR
300-400kVA
In normal operation SWBY and SWOUT switches are closed, the opening of the SWBY do not change the
state of the neutral output system
300-400kVA
The neutral state is not a function of position of the bypass line switch.
500-600kVA
In normal operation SWBY and SWOUT switches are closed, the opening of the SWBY change the state of
the neutral output system
L2
L1
N
L3
L3
L1
L2
L2
L3
L1
Static
Switch
SWMB
SWBY
SWOUT
PE
L1
L2
L2
L1
N
L3
L3
PE
PE
(*)
UPS