ABB PVS-100-TL-B-SY2 Product Manual page 146

In case of absence of External DC disconnect device skip this step.
Internal DC
Switches
External DC
Switch
(If present)
OPEN+LOTO
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.
The time needed for the complete shut-down of the LEDs depends by the input voltage of the
inverter. The complete shut-down of the LEDs may require some minutes.
5. Operations on External DC switches (if present)
The diagram below 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. Identify the external DC
switch(es) in the plant with the support of the plant manager.
• Open the external DC disconnect switch (in blue in the picture) outside
the inverter (IEC 60364-7-712.536.2.2)
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 DC disconnect
device. Affix designated tags (LOTO procedure).
• Check on the status LEDs
out (Missing DC voltage status): All LEDs OFF.
- 146 -
LV/MW
Transformer
External Main LV
AC Switch
LV Distriubution
Panel
the shutdown command has been carried
08
8 - Maintenance
MW Switch