ABB UNO-DM-2.0-TL-PLUS Manual page 164

OPEN+LOTO
External DC
Switch
PV Strings
External DC
Switch
PV Strings
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.
6. Operations on Internal DC disconnect switch
• Open the internal DC switch
INVERTER 1
(Unit under service)
OPEN
+
LOTO
Internal DC
Switch
INVERTER 2
Internal DC
Switch
• Affix designated lock preventing operation onto DC disconnect
switch , affixing designated tags (LOTO procedure).
16
• Check on the status LEDs
carried out (Missing DC voltage status): All LEDs OFF.
- 164 -
(blue in the below picture).
16
OPEN+LOTO
External LV External Main LV
AC Switch AC Switch
External LV
AC Switch
LV Distriubution
Panel
the shutdown command has been
06
8 - Maintenance
16
LV/MW
Transformer
MW Switch