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Section 4
1MAC050144-MB C
Protection functions
282
615 series ANSI
Technical Manual
Figure 133:
Configurable directional settings
Low level blocking
For reliable operation, signals levels should be greater than minimum level. If they are not
greater than minimum level, Timer is blocked. If the amplitude of the positive sequence
current amplitude is greater than
Min trip current
value and positive sequence voltage
amplitude is greater than
Min trip voltage
value then enable signal is sent to the Timer.
Timer
Once activated the internal operate timer is started. The timer characteristic is according
to Definite Time (DT). When the Timer has reached the value of
Release delay time
, the
RELEASE output is activated. If a drop-off situation happens, that is if operating current
moves outside operating sector or signal amplitudes becomes below the minimum level
before
Release delay time
is exceeded, the timer reset state is activated. If drop off
continues for more than
Reset delay time
the 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 the Timer.
4.4.1.5
Application
The 32P function improves the possibility to obtain selective function of the overcurrent
protection in meshed networks. The 32P function is used to block or release other
overcurrent protection functions.
V
1
I
1
RCA=+45 deg
Max forward
angle
Min forward
angle
Max reverse
angle
Min reverse
angle
Backward
area
Forward
area
N
on
-ope
rat
ing
ar
ea
No
n-o
pe
rat
ing
ar
ea
Min operate voltage
Min operate current
Characteristic
Angle/
max torque line
zero torque line
Содержание 615 Series ANSI
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Страница 29: ...1MAC050144 MB C Section 615 series ANSI 22 Technical Manual ...
Страница 389: ...Section 4 1MAC050144 MB C Protection functions 382 615 series ANSI Technical Manual ...
Страница 485: ...Section 6 1MAC050144 MB C Supervision functions 478 615 series ANSI Technical Manual ...
Страница 635: ...Section 10 1MAC050144 MB C Other functions 628 615 series ANSI Technical Manual ...
Страница 707: ...Section 15 1MAC050144 MB C Applicable standards and regulations 700 615 series ANSI Technical Manual ...
Страница 711: ...Section 16 1MAC050144 MB C Glossary 704 615 series ANSI Technical Manual ...
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