Steca coolcept - Page 10

Potential curves of the plus (+) and minus (–) DC connections with respect to PE
U
PV
= Potential between the
plus (+) and minus (–) DC‑connections
StecaGrid 1500/2000 and 1500x/2000x
375 V
−350 V
DC (+)
DC (−)
U
t
0 V
U
P
V
= 350 V
375 V
−75 V
DC (+)
DC (−)
U
t
0 V
U
P
V
= 75 V
Fig. 1: Potential curves of U
PV
at 75 V (left) and 350 V (right)
StecaGrid 2500/3010 and 2500x/3010x
125 V
−160 V
DC (+)
DC (−)
U
t
0 V
−320 V
U
PV
= 125 V
180 V
−180 V
−250 V
250 V
320 V
0 V
−320 V
U
t
U
PV
= 500 V
DC (+)
DC (−)
Fig. 2: Potential curves of U
PV
at 125 V (left) and 500 V
(right)
EN
747,431 | Z09 | 2015-09-30 10