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Section 4
1MAC050144-MB C
Protection functions
288
615 series ANSI
Technical Manual
Figure 137:
Configurable directional setting for “Measured V
G
” or “Calculated V
N
”
(residual voltage) using
Pol signal Sel
setting
The
Characteristic angle
setting is done based on method of grounding employed in the
network. For example in case of isolated network the
Characteristic angle
is set equal to
-90
˚
, in case of compensated network the
Characteristic angle
is set equal to 0
˚
and 60
˚
for solidly grounded systems. In general
Characteristic angle
is selected so that it matches
close to the expected fault angle value, which results into maximum sensitivity. The
Characteristic angle
can be set anywhere between -179
˚
to +180
˚
139 show examples of the operating area with RCA set to +60
˚
and -90
˚
, respectively.
The directional characteristic for measured or calculated residual power is
same.
-VG ( polarizing quantity)
Max forward
angle
Min forward
angle
Min reverse
angle
Non-operating area
Forward
area
IG ( operating quantity)
Max reverse
angle
Backward
area
Non-operating area
Characteristic angle/
Max torque line
Min operate voltage
Min operate current
RCA = 0 deg
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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