Signals - ABB 615 series Technical Manual

Section 4
Protection functions
4.3.4.7
564
2
( 436 V )
P 32 W
≥ ≈
5900
Ω
GUID-28EF2E18-E1A9-4332-B39B-56D3C1141F70 V1 EN
Based onEquation 101 and
checked.
25000 A
V ( 5900 15 75
= Ω +
max
2000
GUID-385AE8B6-691A-42D0-8DAA-069769B90449 V1 EN
˘
u 2 2 436 V ( 74000 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 451: 87A Input signals
Name Type
I_A SIGNAL
BLOCK BOOLEAN
Table 452: 87B Input signals
Name Type
I_B SIGNAL
BLOCK BOOLEAN
Equation 102, the need for voltage-dependent resistor is
. 1 00 . ) 74 0 . kV
Ω + Ω ≈
436 V ) 16 0 . 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
1MAC059074-MB A
A
(Equation 100)
(Equation 101)
(Equation 102)
(Equation 103)
(Equation 104)
615 series ANSI
Technical Manual