ABB RELION 620 Series Technical Manual page 591

1MRS757644 F
4.3.5.7
620 series
Technical Manual
Based on Equation 101
checked.
25000 A
U ( 5900
= Ω +
max
2000
GUID-1B91F8BF-62F5-4FE6-A4B4-4FE3AA3DB969 V1 EN
˘ 2 2 436 ( 74000
u V V
= ⋅ ⋅ ⋅
GUID-CBD7B53B-1E18-46EA-A6D7-CA3D6D1FDEC2 V2 EN
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 ≈ 0 002 . A
GUID-5E213E2C-39C4-4BC5-A8B7-514B599B0976 V1 EN
The sensitivity of the protection can be recalculated taking into account the leakage
current through the VDR as per
I 2000 0 035 ( . A 10 0 0034
= ⋅ +
prim
GUID-1C855302-2D84-4B81-8DD8-EC3B1EAE1315 V2 EN
Signals
Table 510: HIAPDIF Input signals
Name Type
I_A SIGNAL
BLOCK BOOLEAN
Table 511: HIBPDIF Input signals
Name Type
I_B SIGNAL
BLOCK BOOLEAN
Table 512: HICPDIF Input signals
Name Type
I_C SIGNAL
BLOCK BOOLEAN
and Equation 102, the need for voltage-dependent resistor is
15 75 . 1 00 . ) 74 0 . kV
Ω + Ω ≈
436 ) 16 0 .
V kV
− ≈
Equation 104.
. A 0 002 . A ) 142
⋅ + ≈
Default Description
0 Phase A current
0=False Block signal for activating the blocking mode
Default Description
0 Phase B current
0=False Block signal for activating the blocking mode
Default Description
0 Phase C current
0=False Block signal for activating the blocking mode
Section 4
Protection functions
A
(Equation 101)
(Equation 102)
(Equation 103)
(Equation 104)
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