ABB Relion 650 Series Technical Manual page 143

1MRK 506 326-UUS B
selection pickup condition (from phase selection functions) connected to input PHSEL, and the
information from the setting parameter
To release the Phase preference logic, at least two out of three phases must be faulty. The fault
classification whether it is a single phase-to-ground, two-phase or cross-country fault and which
phase to be tripped at cross-country fault is converted into a binary coded signal and sent to the
distance protection measuring zone to release the correct measuring zone according to the
setting of
input PHSEL on the distance zone measuring element.
The input signals RELxxx are additional fault release signals that can be connected to external
protection functions through binary input.
VA
VB
VC
VCVA
IN
VN
PU27PN
PU27PP
Pickup_N
3VOPU
OperMode
RELAG
RELBG
PHSEL
BLOCK
ANSI10000189 V1 EN-US
Figure 77:
5.6.7 Technical data
Table 47:
Function
Operate value, phase-to-phase
and phase-to-neutral
undervoltage
Reset ratio, undervoltage
Operate value, residual
voltage
Table continues on next page
Line distance protection REL650
Technical manual
OperMode . This is done by activating the output ZREL and it shall be connected to the
Voltage and
Current
Discrimination
Phase Preference
Evaluation
Simplified block diagram for Phase preference logic
PPLPHIZ technical data
Range or value
(10.0 - 100.0)% of VBase
< 105%
(5.0 - 300.0)% of VBase
© Copyright 2011 ABB Power Grids. All rights reserved
OperMode are used to determine the condition for trip.
AND
Detect Cross-
Country fault
AND
Accuracy
± 0,5% of V
-
± 0,5% of V
Impedance protection
PICKUP
ZREL
ANSI10000189-1-en.vsd
GUID-BACA37F7-E945-40BC-BF9D-A65BFC96CA91 v4
n
n
Section 5
137