ABB UNO-2.0-I-OUTD Product Manual page 77

In the presence of W002 signalling (UV Input – input voltage below the limit of operation),
the alarm contact switches to then reset itself at the end of the alarm signal. This means that
during the reduced input voltage (display message "Waiting sun") the alarm contact remains
in its resting position.
Vin > Vstart
N.C.
Relay State: Switched
N.O.
Vin < Vstart
N.C.
Relay State: Idle
N.O.
GRID RECONNECTION
t=based on Country Standard
N.C.
Relay State: Idle
N.O.
Vin
Yes No
IS STILL LESS THAN
Vstart
• Crepuscular (display text "CREPUSCULAR")
The relay is activated (state: switched) as soon as the inverter input vol-
tage exceeds the activation voltage set.
The relay is in its rest position when the input voltage drops below 70%
of the activation voltage set.
This mode is useful for disconnecting any output transformers that could
have unnecessary consumption during the night.
11. Remote ON/OFF
This section of the menu allows you to enable/disable the connection/
disconnection of the inverter to/from the grid through the relevant control
signal (R ON/OFF).
• Disable: the connection/disconnection of the inverter to/from the grid is
dictated by the input (voltage from the photovoltaic generator) and output
(grid voltage) parameters of the inverter.
• Enable: the connection/disconnection of the inverter to/from the grid
is dictated by the state of the R ON/OFF signal compared to the GND
signal, as well as by the input (voltage from the photovoltaic generator)
and output (grid voltage) parameters of the inverter.
12. Sleep Mode
This section of the menu allows you to enable/disable SLEEP mode This
feature allows the inverter logic to remain active overnight, thereby also
keeping active any accessory boards installed in the inverter.
13. UV Prot. Time
This section of the menu allows you to set the time for which the inverter
stays connected to the grid after the input voltage has dropped below the
Under Voltage limit (set at 70% of Vstart). ABB sets the time at 60 sec.
The user can set it at any time from 1 to 3600 sec.
Example: with UV Prot. Time set at 60 seconds, if voltage Vin drops be-
low 70% of Vstart at 9:00, the inverter stays connected to the grid (taking
power from it) until 9:01.
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7 - Operation