6.10 AFCI (Optional)
6.10.1 Arc-fault circuit interrupter (AFCI)
In accordance with the National Electrical Code R, Article 690.11, the inverter has a
system for DC arc fault detection and interruption. An electric arc with a power of 300 W
or greater must be interrupted by the AFCI within the time specified by UL 1699B. A
tripped AFCI can only be reset manually. You can deactivate the automatic arc fault
detection and interruption (AFCI) via a communication product in "Installer" mode if you
do not require the function. 2011 NEC Section 690.11 requires that PV systems installed
on buildings with a maximum system voltage of 80 volts or more be equipped with a
listed means of detecting and interrupting series arc-faults in PV source and output
circuits.
6.10.2 Safety precaution
Be aware of fire caused by the electric arc
Only test the AFCI for false tripping in the order described.
Do not deactivate the AFCI permanently.
If the "Error 200" message is displayed and the buzzer alarms, it indicates that an
electric arc has occurred in the PV system. The AFCI will be tripped, and the inverter is in
a permanent shutdown state. The inverter has significant electrical potential
differences between its conductors, which can result in arc flashes when high-voltage
current flows. Please do not perform operations on an inverter in operation.
When the inverter reports Error 200, please perform the following steps:
6.10.3 Operation step
6.10.3.1 Turn the DC/AC Switch to the position "OFF" as shown in Fig 6.17.
6.10.3.2 Perform troubleshooting on the PV system:
Wait until the screen is off.
Check if the open-circuit voltage of the PV strings is within the permissible range.
6.10.3.3 After the fault is rectified, restart the inverter:
Turn the DC & AC Switch to the position "ON".
Fig 6.17
Fig 6.18
27
28
6.11 Backup function (Optional)
The MID-XH series inverters can work in backup mode. In this mode, the inverter can
output power of 230/400 V, 50/60 Hz to the load when the grid goes down. To enable
this mode, you need to install a backup box. The system diagram is shown below:
Fig 6.19
6.9 GFCI (Standard)
6.9.1 Ground fault circuit interrupter (GFCI)
The inverter is equipped with a residual-current device. If residual current jumps of > 300
mA occur and last for over 300ms, the inverter will report Error 201 and display "Residual
I high".
The inverter features the function of detecting residual current and protecting the
inverter against residual current. If you need to install an external AC breaker which
supports residual current detection, you are advised to install a Type A RCD breaker with
the rated residual current greater than 300 mA.
SYN 100-XH-30 COM
(Control Board CN8)
As shown in Fig 6.19, the PV energy storage system comprises PV panels, the inverter, the
backup box, the utility grid and other components, among which the inverter plays a
crucial role. To enable the backup mode, please refer to Section 9.3.3 Setting the backup
mode.
Note:
1. When the grid goes down, the max. output power of a fully charged battery reaches
30kW.
2. Only professional personnel are allowed to configure the backup mode. To enable the
backup mode, you need to purchase a backup box from Growatt.
Note:
The AFCI function is optional. To initiate this function, you need to ensure that you have
enabled it during the installation process. Alternatively, please contact our sales
personnel for support.
To Next Page
Loading...
