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"UniVert 2" inverter
Page 17 of 42 8000012364 BAL, en
3 Function of the Inverter
For technical data or unit settings, refer to the Technical Data Sheet
in chapter 8.
3.1 DC Input
The inverter is operated with 48 V (or 60 V) DC voltage. The input
voltage is fuse-protected outside the INV. For details, refer to the
technical data.
An integrated softstart device limits the making current of the inverter
to a value smaller than the rated input current. The input voltage is
continuously monitored. (See chapter 3.3.)
3.2 AC Output
The INV output voltage is regulated to 230 V 50 H (see chapter 3.9)
and monitored (see chapter 3.5). With an output voltage present and
the INV in operation, the green LED lights up "U
O
OK".
3.3 DC Input Monitoring System
If a value falls below the "DC undervoltage, switch-off" threshold, the
INV is immediately switched off. If the input voltage rises above the
acknowledgement value, the INV is switched back on. If the
monitoring system is triggered, the red "U
I
<" LED lights up.
It the "DC overvoltage, switch-off" threshold is exceeded, the red
"U
I
>" LED lights up and the INV is immediately switched off. If the
value falls below the "DC overvoltage, switch-off" acknowledgement
value, acknowledgement is made after a delay of 15 seconds.
3.4 Temperature Monitoring System
Overtemperature is signalled by the red "ϑ>" LED if the heat sink
temperature exceeds critical values. The faulty unit switches off after
40 seconds. Acknowledgement is made when it has cooled down.
Overtemperature can result from e.g. high ambient temperature,
constant overload of the INV or from fan failure.
3.5 Output Voltage Monitoring System
The INV output voltage is regulated to 230 V 50 Hz (see chapter 3.9)
and monitored. With an output voltage present and the INV in
operation, the green "U
O
OK" LED lights up. When the output voltage
drops below 90% of the rated value, e.g. due to overload, short circuit
or the triggering of a miniature circuit-breaker, the INV switches off
after 2.5 seconds. The unit is not automatically switched back on.
3.6 Monitoring of Functions
After connecting the input voltage, the self-test of the microcontroller
control system is carried out automatically.