Siemens SIMEAS R-PMU, Manual, Page: 34 / 296

5
5.1 General
34
Digital Fault Recorder, SIMEAS R-PMU, Manual
E50417-H1076-C360-A5, Release 10.2012
5.1 General
The SIMEAS R-PMU can be connected in star, delta or monophase.
The VCDAU, VDAU and CDAU data acquisition modules provide two measured value groups
each for alternating values, channels 1 to 4 and channels 5 to 8.
A voltage channel group can be connected using the following connection modes:
‰
Three-phase star connection
‰
Three-phase delta connection
‰
Monophase
If a voltage group has been connected in star connection, the 4th and the 8th channel can be
measured or calculated. When only three phases in star connection are measured and
calculated, the star point voltage V
N
or the current in the star point I
N
, the result of the vector
additions V
N
= 1/3[V
L1
+ V
L2
+ V
L3
] or I
N
= -[I
L1
+ I
L2
+ I
L3
] will be displayed as the 4th and/or the
8th channel.
With delta connection or monophase, the 4th and the 8th channel are always measured.
A current channel group can be connected using the following connection modes:
‰
Three-phase connection
‰
Monophase
If the current channel group is connected to the 3-phase system, the 4th and 8th channel can be
measured or calculated. With monophase connection, the 4th and the 8th channel are always
measured.
The following tables show the terminal assignment of the corresponding modules.
Table 5-1 VCDAU - voltage transformer connection
Channel Star connection Delta connection Monophase
1 V
L1
V
L12
V
L1
2 V
L2
V
L23
V
L2
3 V
L3
V
L31
V
L3
4 V
N
V
4
V
L4
Table 5-2 VCDAU - current transformer connection
Channel 3-phase
connection
Monophase
5 I
L1
I
L1
6 I
L2
I
L2
7 I
L3
I
L3
8 I
N
I
L4