Siemens SENTRON PAC3100 Manual page 86

Parameterizing
9.2 Parameterizing the operator interface
VOLTAGE INPUTS
Figure 9-4
CONNECTION TYPE
Use PTs?
VOLTAGE INPUT
86
"VOLTAGE INPUTS" device setting
Connection types:
Measurement with/without voltage transformer
Rated voltage of the measuring system. Must be specified if
measuring is done direct on the system without voltage
transformers.
The property "VOLTAGE INPUT" is only visible, if
"USE PTs?" is set to "
3P4W: 3 phases, 4 conductors,
unbalanced load
3P3W: 3 phases, 3 conductors,
unbalanced load
Default value: 3P4W
ON/OFF switch: ON /
ON: Measurement using voltage transformers.
When measuring via voltage transformer, the device
must know the voltage conversion ratio. For this
purpose, the primary and secondary voltages must be
specified in the fields "PT PRIMARY" and "PT
SECONDARY".
When changing from direct measurement to
measurement using voltage transformers, the device
accepts the last set reference measuring voltage as the
secondary voltage and as the primary voltage.
OFF: Measurement direct on the low-voltage
system.
When changing from measurement using voltage
transformers to direct measurement, the device
accepts the last set secondary voltage as the reference
measuring voltage.
Default value: Off
Range: 1 V to 480 V, freely adjustable
Default value: 400 V
Off".
OFF.
SENTRON PAC3100
Manual, 07/2009, A5E02385159B-01