ABB RER670 - Page 186

With OpMode set to 2I0cosfi the current component in the direction equal to the
characteristic angleRCADir has the maximum sensitivity. The characteristic for
RCADir
is equal to 0° is shown in Figure
59.


0, 90RCADir ROADir
0
2I
 
0ref
ang(2I ) ang( 2U )

0ref
2U U


0
2I cos
IEC16000127-1-en.vsdx
IEC16000127 V1 EN-US
Figure 59: Characteristic for RCADir equal to 0°
The characteristic is for RCADir equal to -90° is shown in Figure
60.
IEC16000128-1-en.vsdx
ref
U
 

90 , 90RCADir ROADir
0
2I

0
2Icos
 
0
(2 ) ( )
ref
ang I ang U

0
2U
IEC16000128 V1 EN-US
Figure 60: Characteristic for RCADir equal to -90°
When OpMode is set to 2U02I0cosfi the apparent residual power component in the
direction is measured.
Section 8 1MRK 506 375-UEN A
Current protection
180 Railway application RER670 2.2 IEC
Application manual