ABB 615 Series - Signals

P
V
W≥ ≈
( )436
5900
32
2
Ω
GUID-28EF2E18-E1A9-4332-B39B-56D3C1141F70 V1 EN (Equation 100)
Based onEquation 101 and Equation 102, the need for voltage-dependent resistor is
checked.
V
A
kV
max
= + + ≈
25000
2000
5900 15 75 1 00 74 0( . . ) .Ω Ω Ω
GUID-385AE8B6-691A-42D0-8DAA-069769B90449 V1 EN (Equation 101)
˘
( ) .u V V V kV= ⋅ ⋅ ⋅ − ≈2 2 436 74000 436 16 0
GUID-CBD7B53B-1E18-46EA-A6D7-CA3D6D1FDEC2 V2 EN (Equation 102)
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 103)
The sensitivity of the protection can be recalculated taking into account the leakage
current through the VDR as per Equation 104.
I A A A A
prim
= ⋅ + ⋅ + ≈2000 0 035 10 0 0034 0 002 142( . . . )
GUID-1C855302-2D84-4B81-8DD8-EC3B1EAE1315 V2 EN (Equation 104)
4.3.4.7 Signals
Table 451: 87A 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 452: 87B Input signals
Name
Type Default Description
I_B SIGNAL 0 Phase B current
BLOCK BOOLEAN 0=False Block signal for activating the blocking mode
Section 4 1MAC059074-MB A
Protection functions
564 615 series ANSI
Technical Manual