Function
14
VME420_D00026_03_M_XXDE/04.2019
3.2 Fast commissioning for U
n
= 230 V
If you are already familiar with voltage monitors, you can reduce the time for
commissioning and connection using this brief description.
1. Check that the system being monitored is operated with a nominal
voltage of U
n
= 230 V and 50 Hz. This is the precondition for an auto-
matic setting of the response values (Preset) after the first connection
to the nominal voltage.
2. Make sure that the voltage monitor is in the delivery status (factory set-
ting has not been changed). In case of doubt, restore the factory set-
ting (page 40).
3. When the conditions 1 and 2 are satisfied, you can connect the voltage
monitor to the three-phase system to be monitored according to the
wiring diagram (page 22). The following predefined response values
will be set automatically:
4. The currently measured voltage between the terminals U1/+ and U2/-
appears on the display. In addition, you can query the system fre-
quency f using the Up and Down key when AC voltage is applied.
For detailed information about the preset function and other voltage ranges
refer to page 15; page 41 provides a summary of all factory settings.
If you want to reset the voltage monitors to factory settings, refer to page 40.
VME420
U
n
, f
n
Preset
operating
range
Response
value
< U, < f
Response
value
> U, > f
230 V 196…253 V 196 V 253 V
50 Hz 47…53 Hz 49 Hz 51 Hz
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