Siemens SENTRON PAC3100, Manual, Page: 18 / 152

Description
3.2 Measuring inputs
SENTRON PAC3100
18
Manual, 07/2009, A5E02385159B-01
Connection types
Two connection types have been provided for connecting three-wire or four-wire systems
with unbalanced load.
Table 3- 2 Available connection types
Short code Connection type
3P4W 3 phases, 4 conductors, unbalanced load
3P3W 3 phases, 3 conductors, unbalanced load
The input circuit of the device must correspond to one of the connection types listed. Select
the suitable connection type for the purpose.
You can find connection examples in the chapter "Connection".
CAUTION
The wrong system connection can destroy the device
Before connecting SENTRON PAC3100, you must ensure that the local power supply
conditions agree with the specifications on the type plate.
The short code of the connection type must be entered in the device settings at startup. You
can find the instructions for parameterizing the connection type in the chapter
"Commissioning".
Display of the measured variables depending on the connection type
The total set of representable measured variables is restricted by the method of connecting
the device.
A measured value that cannot be indicated because of the connection method is shown on
the display by means of a broken line "----".
Figure 3-1 Display of the measured voltage in the case of connection type 3P4W
Figure 3-2 Display of the measuring voltage in the case of connection type 3P3W