![background image](http://html.mh-extra.com/html/abb/615-series-ansi/615-series-ansi_technical-manual_4665148.webp)
1MAC050144-MB C
Section 4
Protection functions
615 series ANSI
141
Technical Manual
Figure 61:
Two-phase short circuit, short circuit is between phases B and C
Negative-sequence voltage as polarizing quantity
When the negative voltage is used as the polarizing quantity, the angle difference between
the operating and polarizing quantity is calculated with the same formula for all fault
types:
(Equation 1)
This means that the actuating polarizing quantity is -V2.
The equations are valid when network rotating direction is
counterclockwise, that is, ABC. If the network rotating direction is
reversed, 180 degrees is added to the calculated angle difference. This is
done automatically with a system parameter
Phase rotation
.
ANGLE X
V
I
RCA
_
(
)
( )
= −
−
−
2
2
Summary of Contents for 615 Series ANSI
Page 1: ...Relion Protection and Control 615 series ANSI Technical Manual ...
Page 2: ......
Page 29: ...1MAC050144 MB C Section 615 series ANSI 22 Technical Manual ...
Page 389: ...Section 4 1MAC050144 MB C Protection functions 382 615 series ANSI Technical Manual ...
Page 485: ...Section 6 1MAC050144 MB C Supervision functions 478 615 series ANSI Technical Manual ...
Page 635: ...Section 10 1MAC050144 MB C Other functions 628 615 series ANSI Technical Manual ...
Page 711: ...Section 16 1MAC050144 MB C Glossary 704 615 series ANSI Technical Manual ...
Page 712: ......