Hitachi Relion 670 Series Applications Manual page 169

1MRK506375-UEN Rev. N
IEC16000127 V1 EN-US
Figure 65:
The characteristic is for RCADir equal to -90° is shown in Figure 66.
IEC16000128 V1 EN-US
Figure 66:
When OpMode is set to 2U02I0cosfi the apparent residual power component in the direction is
measured.
When OpMode is set to 2I0 and fi the function will operate if the residual current is larger than the
setting INDir> and the residual current angle is within the sector RCADir ± ROADir.
The characteristic for this OpMode when RCADir = 0° and ROADir = 80° is shown in Figure 67.
Railway application RER670
Application manual
2I
0
 
ang(2I ) ang(2U

2I cos
0
Characteristic for RCADir equal to 0°
U
ref
 
RCADir
2I
0
 
2I cos
0
 
ang I (2 )
0
IEC16000128-1-en.vsdx
Characteristic for RCADir equal to -90°
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
 
RCADir 0 , ROADir 90

)
0 ref
 
2U U
0 ref

IEC16000127-1-en.vsdx
 

90 , ROADir 90

ang U ( )
ref

2U
0
Current protection

Section 8
163