Application - ABB RELION REX640 Technical Manual

1MRS759142 C
5.15.6
5.15.7
5.15.8
Table 1118: DNZSRDIR Group settings (Basic)
Parameter Values (Range)
Release delay time
Directional mode
Characteristic angle
Max forward angle
Table continues on next page
REX640
Technical Manual
current moves out of the operating sector or signal amplitudes drop below the
minimum levels, before Release delay time is exceeded, the Timer reset state is
activated. If the drop-off continues for more than Reset delay time, Timer is
deactivated.
Blocking logic
The binary input BLOCK can be used to block the function. The activation of the
BLOCK input deactivates RELEASE output and resets Timer.

Application

The neutral power directional element function DNZSRDIR improves the possibility
to obtain selective function of the overcurrent protection in meshed networks.
DNZSRDIR is used to block or release other overcurrent protection functions.
Signals
Table 1116: DNZSRDIR Input signals
Name
I3P
IRES
U3P
URES
BLOCK
RCA_CTL
Table 1117: DNZSRDIR Output signals
Name
RELEASE
DIRECTION
Settings
Unit
0...1000 ms
1=Non-directional
2=Forward
3=Reverse
-179...180 deg
0...180 deg
Type Default Description
SIGNAL - Three-phase currents
SIGNAL - Residual current
SIGNAL - Three-phase voltages
SIGNAL - Residual voltage
BOOLEAN 0=False Block signal for activating the blocking mode
BOOLEAN 0=False Relay characteristic angle control
Type Description
BOOLEAN Release signal if direction criteria is satisified
Enum Direction information
Step Default
10 10
2=Forward
1 60
1 88
Protection related functions
Description
Release delay time
Directional mode
Characteristic angle
Maximum phase angle in forward
direction
Section 5
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