ABB Relion 670 series - Authorization with CAM-Enabled IED

L1
(A)
L2
(B)
L3
(C)
Protected Object
CT 1200/1
Star/Wye
Connected
L1
(A)
L2
(B)
L3
(C)
CT 1200/1
Star/Wye
Connected
7
8
9
1
0
1
1
1
2
1
2
3
4
5
6
AI01
(I)
AI02
(I)
AI03
(I)
AI04
(I)
AI05
(I)
AI06
(I)
7
8
6
9
X1
R
4
R
5
R
6
1
2
1
2
1
2
11 12 13 14
U U U
R
1
1
3
4
2
1
3
R
2
2
4
1
3
R
3
2
4
1 2 3 4 5 6 7
L1 (A)
L2 (B)
L3 (C)
N
3-Ph Plate with Metrosils and Resistors
2
3
5
4
10
X X
L1 (A)
L2 (B)
L3 (C)
N
1
IED
IEC07000193_2_en.vsd
AI3P
AI1
AI2
AI3
AI4
AIN
SMAI2
BLOCK
^GRP2L1
^GRP2L2
^GRP2L3
^GRP2N
TYPE
IEC07000193 V2 EN
Figure 31: CT connections for high impedance differential protection
Pos
Description
1 Scheme earthing point
Note that it is of outmost importance to insure that only one earthing point
exist in such scheme.
2 Three-phase plate with setting resistors and metrosils.
3 Necessary connection for three-phase metrosil set. Shown connections are applicable for both
types of three-phase plate.
4 Position of optional test switch for secondary injection into the high impedance differential IED.
5 Necessary connection for setting resistors. Shown connections are applicable for both types of
three-phase plate.
6 The factory made star point on a three-phase setting resistor set.
Shall be removed for installations with 650 and 670 series IEDs. This star
point is required for RADHA schemes only.
7 How to connect three individual phase currents for high impedance scheme to three CT inputs
in the IED.
1MRK 502 029-UEN A Section 5
Installing the IED
57
Installation and commissioning manual