Example On How To Connect A Residually Connected Ied - ABB RER670 Applications Manual

Section 4
Analog inputs
4.2.4.4
132 kV
2
100
132 kV
2
100 V
2
IEC16000152 V1 EN-US
Figure 18: Residually connected VT in two-phase power system
58

Example on how to connect a residually connected IED

Figure 18 gives an example about the wiring of a residually connected VT to the
IED. It shall be noted that this type of VT connection presents a secondary voltage
proportional to 2U0 to the IED.
The primary rated voltage of an open Delta VT is always equal to U
series connected VT secondary windings gives a secondary voltage equal to the
sum of the two phase voltages. Thus the secondary windings of open deltaVTs may
have a secondary rating of 110/2V.
Figure 18 gives overview of required actions by the user in order to make this
measurement available to the built-in protection and control functions within the
IED as well.
L1
L2
V
2
+2Uo
IED
2
3
1
1MRK 506 375-UEN A
. Two
Ph-E
5
SMAI2
BLOCK
^GRP2L1
^GRP2L2
^GRP2L1L2
^GRP2N
4
IEC16000152-1-en.vsdx
Railway application RER670 2.2 IEC
Application manual
SEMOD55055-163 v9
AI2P
AI1
AI2
AI3
AI4
AIN