Santerno DCREG2 Series User Manual page 112

15P0059B3
USER MANUAL
Finally, a third protective measure consists in using only a switching reactance on mains side (switching
reactance is shown in Fig. 3).
This is the cheapest solution, but no protection is ensured, because no closing link of the magnet current
is provided in case of power failure or output wire failure.
In that case, SCR modules are damaged by the over voltage caused by the magnet.
L3
L2
L1
112/200
FU1-2-3
EM: Electromagnet
FIG. 3
53
54
DCREG4
L1
L2
L3
L
FU1-2-3: Ultrafast fuses
DCREG2
DCREG4
A1
A2
L: Switching impedance
EM