ABB PVS-100-TL-B-SY2 Product Manual page 145

Identify the external AC switch(es) in the plant with the support of the plant manager.
In case none of the LV AC switches are present, the MV switch must be opened.
Internal DC
Switches
External DC
Switch
(if present)
PV Strings
Internal DC
Switches
External DC
Switch
(if present)
PV Strings
Internal DC
Switches
External DC
Switch
(if present)
PV Strings
Identification of the external switch may require the cooperation of the plant manager and it
must be included in the switching plan defined during the preparation of the work.
4. Operations on External AC switches
The below diagrams represents a possible arrangement of the PV plant.
Depending on the design choices made by the developer of the plant
some of the devices could not be present.
• Open the external AC disconnect switch or the main external AC
disconnect switch (in blue in the picture) outside the inverter (IEC
60364-7-712.536.2.2). In case none of the LV AC switches are present,
the MV switch must be opened.
Inverter 1
Unit under service
Power
Module
Internal AC
Wiring
Switch
Box
(if present)
External LV
AC Switch
OPEN+LOTO
Inverter 2
Power
Module
Internal AC
Wiring
Switch
Box
(if present)
External LV
AC Switch
Inverter 3
Power
Module
Internal AC
Wiring
Switch
Box
(if present)
External LV
AC Switch
• Affix padlocks to prevent operation onto any external AC disconnect
device. Affix designated tags (LOTO procedure).
• Check on the LED panel
out (Missing Grid status):
- Power LED (Green): Flashing
- Alarm LED (Yellow): ON (solid)
- GFI LED (Red): OFF
- WLAN/LAN LED (Blue): Depends by the communication status.
- 145 -
LV/MW
Transformer
External Main LV
AC Switch
LV Distriubution
Panel
the shutdown command has been carried
08
8 - Maintenance
MW Switch