ABB Relion 650 Series Technical Manual page 191

1MRK 506 326-UUS B
6.7.6 Monitored data
Table 99: SDEPSDE (67N) Monitored data
Name
INCOSPHI
IN
VN
SN
ANG FI-RCA
6.7.7 Operation principle
6.7.7.1 Function inputs
The function is using phasors of the residual current and voltage. Group signals I3P and V3P
containing phasors of residual current and voltage is taken from pre-processor blocks.
The sensitive directional ground fault protection has the following sub-functions included:
6.7.7.2 Directional residual current protection measuring 3I
φ is defined as the angle between the residual current 3I
with the set characteristic angle
normally set equal to 0 in a high impedance grounded network with a neutral point resistor as the
active current component is appearing out on the faulted feeder only.
an isolated network as all currents are mainly capacitive. The function operates when 3I
gets larger than the set value.
Line distance protection REL650
Technical manual
Type Values (Range)
REAL -
REAL -
REAL -
REAL -
REAL -
RCADir (φ=ang(3I
© Copyright 2011 ABB Power Grids. All rights reserved
Unit Description
A Mag of residual current along polarizing
qty 3I0cos(Fi-RCA)
A Measured magnitude of the residual
current 3I0
kV Measured magnitude of the residual
voltage 3V0
MVA Measured magnitude of residual power
3I03V0cos(Fi-RCA)
deg Angle between 3V0 and 3I0 minus RCA (Fi-
RCA)
·cos φ
0
and the reference voltage compensated
0
)-ang(V ) ). Vref = -3V
0 ref
RCADir is set equal to -90° in
Section 6
Current protection
PID-1975-MONITOREDDATA v7
SEMOD171963-4 v2
SEMOD171963-8 v4
jRCADIr
RCADir is
e .
0
·cos φ
0
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