11
EN
ISOM K-20 - 551805A - SOCOMEC
6.2. Connecting to the electrical network and circuits
The insulation monitoring system ISOM K-20 is suitable for single-phase, two-phase, three-phase and DC networks.
It ensures the insulation of a complete powered IT system is monitored.
6.2.1.
Description of the main network and circuit combinations
K-20
L1 L2
FE
KE
L1
3AC
L2
L3
1
DC
K-20
L1 L2
FE
L+
L-
1
KE
AC
K-20
L1 L2
FE
KE
L
N
1
K-20
L1 L2
FE
3AC + N
N
L1
L2
L3
1
KE
Legend:
3
3
M
M
1
2 A gG
