Connecting To The Grid - Omron KP100G Technical Manual

KP100G

Connecting to the Grid

Wiring the KP100G to the Grid
The AC connection unit is an interface between PV-Inverter and the Public Utility. It may consist of an electrical breaker, fuse and terminals for
connection to both PV-Inverter and the Public Utility. This AC connection unit must be designed by qualified technician to comply with local safety
standards.
Use a 20 A trip AC breaker that matches the B trip characteristics.
Preliminary Confirmations
Check the following items before wiring.
No. Inspection Item
Solar module installation
1
condition
KP100G installation condition
2
Wiring, connection, and
3
conductivity
KP100G ground resistance
4
Voltage measurement for each
5 solar module string
(See Note 1.)
Grid voltage confirmation
6
Note 1: The output voltage of the solar modules varies depending on their type and the number connected in series. Confirm that the voltage difference
between adjacent strings is within the range of several volts.
AC Output Connector
AC Output cable
AC connection unit
2
(4mm or AWG12)
(Consisting of
GND cable
breaker, fuse,
2
(10mm or AWG8)
terminals etc.)
Fig, 5-34 Wiring the KP100G to the grid
Table 5-3 Preliminary Confirmations
Measurement or Confirmation
Visual confirmation:
Refer to the installation manual for the solar modules.
Visual confirmation:
Make sure none of the mounting screws are loose.
Make sure that the KP100G and the mounting base plate are securely fixed with the
main body mounting screw.
Visual confirmation:
Inspect for looseness in plugs and screws, proper wire connection, and conductivity.
Measurement confirmation:
Standard: 100 Ω max.
KP100G actual measurement:
Measurement confirmation:
Measure to confirm that the grid voltage is 230 V.
Actual measurement: V
28
Grid
Ω
V
Check mark