ABB PVS-175-TL - Page 133

133Maintenance
EN
8. Operations on Internal DC disconnect switches (19)
• Open all the internal DC switches (19) (1, 2 and 3, blue in the below picture).
PV Strings
External DC
Switch
Internal DC
Switches
Internal AC
Switch
PVS-175-TL
(Unit under service)
PWRMOD
WBOX
OPEN+LOTO
PV Strings
External DC
Switch
Internal DC
Switches
Internal AC
Switch
PVS-175-TL
PWRMOD
WBOX
External LV
AC Switch
External Main LV
AC Switch
External LV
AC Switch
LV Distriubution
Panel
MW Switch
LV/MW
Transformer
OPEN+LOTO
OPEN
+
LOTO
OPEN
+
LOTO
• Affix designated lock preventing operation onto all DC disconnect switches (19), affixing designated
tags (LOTO procedure).
• Check on the status LEDs (08) the shutdown command has been carried out (Missing DC voltage status):
All LEDs OFF.
NOTE – D 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.