Siemens SENTRON PAC3100, Manual, Page: 57 / 152

Commissioning
7.3 Parameterizing the device
SENTRON PAC3100
Manual, 07/2009, A5E02385159B-01
57
7.3.2.3 Setting the conversion ratio of the voltage transformer
The factory setting is measurement direct on the system. At initial startup, the following steps
must be carried out if you want to measure using voltage transformers.
The conversion ratio can only be set if measurement using voltage transformers is set in the
device settings. Only then are the fields for primary and secondary voltage visible on the
display.
Figure 7-6 "USE PTs?" device setting switched on
Procedure
1. In the "SETTINGS" menu, call the "BASIC PARAMETERS" entry.
2. In the "BASIC PARAMETERS" menu, open the "VOLTAGE INPUTS" entry:
<F4>
The display shows the current settings.
If the "PT PRIMARY" and "PT SECONDARY" fields are not visible, direct measurement
on the system is set. Switch from direct measurement to measurement using voltage
transformers. You can find the instructions for this in the "Measurement using voltage
transformers" chapter.
3. Go to the "PT PRIMARY" device setting:
<F2> or <F3>
4. Open edit mode of the "PT PRIMARY" device setting:
<F4>
5. Set the desired value:
<F2> or <F3>
6. Accept the value:
<F4>
The value of the primary voltage is permanently saved and becomes effective
immediately.
The display returns to display mode.
7. Go to the "PT SECONDARY" device setting:
<F2> or <F3>
Proceed in exactly the same way as when entering the primary voltage.
The value of the secondary voltage is permanently saved and becomes effective
immediately.
The display returns to display mode.
8. Return to one of the selection menus or to the measured values display:
<F1>