ABB UNO-DM-1.2-TL-PLUS-Q User Manual

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001004AG
8 - Maintenance
6. Operations on Internal DC disconnect switch
16
• Open the internal DC switch
16
(blue in the below picture).
PV Strings
External DC
Switch
INVERTER 1
(Unit under service)
OPEN+LOTO
External LV
AC Switch
External Main LV
AC Switch
MW Switch
LV/MW
Transformer
OPEN+LOTO
OPEN
+
LOTO
PV Strings
External DC
Switch
INVERTER 2
External LV
AC Switch
LV Distriubution
Panel
Internal DC
Switch
Internal DC
Switch
• Afx designated lock preventing operation onto DC disconnect
switch
16
, afxing designated tags (LOTO procedure).
• Check on the status LEDs
06
the shutdown command has been
carried out (Missing DC voltage status): All LEDs OFF.
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.

ABB UNO-DM-1.2-TL-PLUS-Q Specifications

General

Brand	ABB
Model	UNO-DM-1.2-TL-PLUS-Q
Category	Inverter
Language	English