ABB RELION Series, Техническое руководство

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V
1
I
1
RCA=+45 deg
Max f orward
angle
Min forward
angle
Max reverse
angle
Min reverse
angle
Backward
area
Forward
area
Min operate voltage
Min operate current
Characteristic
Angle/
max torque line
zero torque line
GUID-F08570BC-073C-4911-B082-091D652F7E35 V1 EN
Figure 231: Configurable directional settings
Low-level blocking
For a reliable operation, signal levels should be greater than the minimum level. If they
are not greater than the minimum level, Timer is blocked. If the amplitude of the
positive-sequence current is greater than the
Min operate current value and the
positive-sequence voltage amplitude is greater than the Min operate voltage value, the
On signal is sent to Timer.
Timer
Once activated, the internal operating timer is started. The Timer characteristic is
according to definite time DT. When Timer has reached the value of
Release delay
time , the
RELEASE
output is activated. If a drop-off situation happens, that is, if the
operating current moves outside the operating sector or signal amplitudes drop below
the minimum level 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 the
RELEASE
output and resets Timer.
4.6.1.5 Application
The three-phase power directional element DPSRDIR improves the possibility to
obtain a selective function of the overcurrent protection in meshed networks. The
function is used to block or release other overcurrent protection functions.
1MRS758755 A
Section 4
Protection functions
REC615 and RER615 455
Technical Manual