ABB Relion 611 Series, Technical Manual

Page: 230 / 536

Based on Equation 21 and Equation 22 , the need for voltage-dependent resistor is
checked.
U
A
kV
max
= + + ≈
25000
2000
5900 15 75 1 00 74 0 ( . . ) .
Ω Ω Ω
GUID-1B91F8BF-62F5-4FE6-A4B4-4FE3AA3DB969 V1 EN
(Equation 21)
˘
( ) . u V V V kV
= ⋅ ⋅ ⋅ − ≈
2 2 436 74000 436 16 0
GUID-CBD7B53B-1E18-46EA-A6D7-CA3D6D1FDEC2 V2 EN
(Equation 22)
The voltage-dependent resistor (one for each phase) is needed in this case as the
voltage during the fault is higher than 2 kV.
The leakage current through the VDR at the stabilizing voltage can be available from
the VDR manual, assuming that to be approximately 2 mA at stabilizing voltage
Iu A
≈
0 002 .
GUID-5E213E2C-39C4-4BC5-A8B7-514B599B0976 V1 EN
(Equation 23)
The sensitivity of the protection can be recalculated taking into account the leakage
current through the VDR as per
Equation 24 .
I A A A A
prim
= ⋅ + ⋅ + ≈
2000 0 035 10 0 0034 0 002 142 ( . . . )
GUID-1C855302-2D84-4B81-8DD8-EC3B1EAE1315 V2 EN
(Equation 24)
4.3.1.7 Signals
Table 213: HIAPDIF Input signals
Name Type Default Description
I_A SIGNAL 0 Phase A current
BLOCK BOOLEAN 0=False Block signal for activating the blocking mode
Table 214: HIBPDIF Input signals
Name Type Default Description
I_B SIGNAL 0 Phase B current
BLOCK BOOLEAN 0=False Block signal for activating the blocking mode
Table 215: HICPDIF Input signals
Name Type Default Description
I_C SIGNAL 0 Phase C current
BLOCK BOOLEAN 0=False Block signal for activating the blocking mode
Section 4
1MRS757454 D
Protection functions
224 611 series
Technical Manual