ABB RELION REX640 - 4.3.6.8 Signals; HIAPDIF Input signals; HIBPDIF Input signals

P
V
W≥ ≈
( )436
5900
32
2
Ω
(Equation 196)
Based on Equation 197 and Equation 198 , the need for voltage-dependent resistor is
checked.
U
A
kV
max
= + + ≈
25000
2000
5900 15 75 1 00 74 0( . . ) .Ω Ω Ω
(Equation 197)
˘
( ) .u V V V kV= ⋅ ⋅ ⋅ − ≈2 2 436 74000 436 16 0
(Equation 198)
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.
(Equation 199)
The sensitivity of the protection can be recalculated taking into account the leakage
current through the VDR as per Equation 200 .
I A A A A
prim
= ⋅ + ⋅ + ≈2000 0 035 10 0 0034 0 002 142( . . . )
(Equation 200)
4.3.6.8 Signals
HIAPDIF Input signals
Table 697: HIAPDIF Input signals
Name Type Default Description
I3P SIGNAL - Three-phase currents
BLOCK BOOLEAN 0=False Block signal for acti-
vating the blocking
mode
1MRS759142 F Protection functions
REX640
Technical Manual
783