1MAC050144-MB C
Section 4
Protection functions
615 series ANSI
139
Technical Manual
Figure 59:
Two-phase short circuit, short circuit is between phases B and C
Cross-polarizing as polarizing quantity
Table 122: Equations for calculating angle difference for cross-polarizing method
The polarizing quantity is rotated with 90 degrees. The characteristic angle is assumed to
be ~ 0 degrees.
Faulted
phases
Used
fault
current
Used
polarizing
voltage
Angle difference
A
I
A
V
BC
B
I
B
V
CA
C
I
C
V
AB
A - B
I
A
- I
B
V
BC
-
V
CA
B - C
I
B
- I
C
V
CA
-
V
AB
C - A
I
C
- I
A
V
AB
-
V
BC
ANGLE A
V
I
BC
A
RCA
o
_
(
) -
(
) -
=
+
90
ANGLE B
V
I
CA
B
RCA
o
_
(
) -
(
) -
=
+
90
ANGLE C
V
I
AB
C
RCA
o
_
(
) -
(
) -
=
+
90
ANGLE A
V
V
I
I
BC
CA
A
B
RCA
o
_
(
-
) -
(
-
) -
=
+
90
ANGLE B
V
V
I
I
CA
AB
B
C
RCA
o
_
(
-
) -
(
-
) -
=
+
90
ANGLE C
V
V
I
I
AB
BC
C
A
RCA
o
_
(
-
) -
(
-
) -
=
+
90
Содержание 615 Series ANSI
Страница 1: ...Relion Protection and Control 615 series ANSI Technical Manual ...
Страница 2: ......
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 ...
Страница 712: ......