Sonnen sonnenBatterie 10, Installation Instructions Manual, Page: 37 / 100

Connecting the storage system | 6
KD-557 | 1000241 | EN | 02 37 / 100
Illustration 9: left: correct energy flow direc-
tion / right: incorrect energy flow direction
• The clamp-on current transformers are clamped
across the affected lines. The energy flow direc-
tion of the clamp-on current transformer must
be observed.
The energy flow in the line must run from K to L.
• In the case of a one-phase PV inverter or a single-phase mains, only the clamp-on cur-
rent transformer for the phase in question is connected. The other two clamp-on cur-
rent transformers must not be connected.
1 2 3 1 2 3
1
2
3
Illustration 10: Connecting the clamp-on current transformers for three-phase (left) and single-phase (right) in-
stallation
• Do not confuse the phases! Power measurement only works if the current and voltage
of the same phase are measured.
Example: The clamp-on current transformer L1 (marked with number 1) must be connected
to phase L1. This phase L1 must also be connected to terminal L1 of the voltage measure-
ment terminal strip. Only then the correct power for phase L1 can be determined.
3
2
1 2 3
1
3
1
2
1 2 3
Illustration 11: Connecting the clamp-on current transformers: incorrect (right) and correct (left)