Signals - ABB RED615 Technical Manual

Section 4
Protection functions
4.2.4.7
334
The admittance characteristic is set to cover the total admittance of the protected
feeder with a proper margin, see
Conductance forward = 1.73 mS · 0.2 ≈ 0.35 mS
Conductance reverse = -1.0 mS (valid range apprx. 0.5 · 1.15 - 1.2 · 1.73 = -0.6...-2.1)
Susceptance forward = 0.1 mS
Susceptance reverse = -1.15 mS · 1.2 ≈ -1.4 mS
5
Go (mS)
4
3
2
1
0
-1
Backward fault:
-2
Yo ≈ -j*1.15mS
-3
-4
-5
-5 -4 -3 -2 -1 0 1
GUID-AE9BB46E-B927-43F6-881A-A96D3410268D V1 EN
Figure 172: Admittances of the example

Signals

Table 317: EFPADM Input signals
Name Type
Io SIGNAL
Uo SIGNAL
BLOCK BOOLEAN
RELEASE BOOLEAN
Table 318: EFPADM Output signals
Name Type
OPERATE BOOLEAN
START BOOLEAN
Figure 172.
5
4
3
2
1
0
Bo (mS)
-1
-2
Forward fault,
Yo ≈ 1.73+j*Bo mS
-3
-4
-5
-5 -4
2 3 4 5
Default Description
0 Residual current
0 Residual voltage
0=False Block signal for activating the blocking mode
0=False External trigger to release neutral admittance
protection
Description
Operate
Start
1YHT530004D05 D
Go (mS)
OPERATE OPERATE
0.1 mS
-1.4 mS
0.35 mS
-1.0 mS
OPERATE OPERATE
-3 -2 -1 0 1 2 3
615 series
Technical Manual
Bo (mS)
4 5