23
Over-Current Protection Device (OCPD) for the AC sides
To protect the inverter, we recommend installing a device for protection against over-current
and leakage, based on the following current ratings noted in Table 4.4:
Table 4.4 Current ratings for sizing OCPD
S6-EH1P3.8K-H-US
S6-EH1P5K-H-US
S6-EH1P7.6K-H-S-US
S6-EH1P7.6K-H-L-US
Inverter
Grid Max Output
Current
Grid Max Input
Current
15.8A
23.8
20.8A
31.2A
31.7A
31.7A
47.6A
47.6A
Note:
OCPD sizing shall be done in accordance with the NEC and local electrical
codes and standards.
4. Installation
Backup Rated
Output Current
Backup Max Output
Current (10 sec)
23.8A
15.8A
20.8
25.4A
33.3A
31.7A
50.7A
31.7A
50.7A
S6-EH1P10K-H-US
S6-EH1P11.4K-H-US
41.7A
62.6A
47.5A
71.3A
41.7A
66.7A
47.5A
76A
Note:
The L1 and L2 cables going from the B-L1 and B-L2 terminals of the
inverter should terminate in an OCPD and not directly in the panel lugs
.
AC Bypass Switch
This switch determines the source of power for the
inverter backup circuit. Should the inverter fail, the
backup circuit will lose power. The switch allows the
backup to be powered directly by the grid in this event.
The three settings operate as follows:
1
: backup circuit is powered by the grid directly
0
: backup circuit is disconnected from the inverter
2
: backup circuit is powered by the inverter directly
For normal operation, the switch should be on 2. If the
grid fails, the backup circuit will stay energized by the
inverter. If the inverter fails or has an alarm that causes
it to shut down, the switch should be on 1. This allows
the backup circuit to be powered by the grid instead.
1
is for bypass (failure)
is for backup off
0
is for normal operation
2