Hitachi Relion 670 Series Applications Manual page 131

1MRK506375-UEN Rev. N
RFPPStart: To set the forward and reverse resistive reach for PP starting element. This may be set
equal to RFPEStart, which is 50.16 Ohm.
I0MinOp: The minimum operating current of residual overcurrent start as % of IBase. Set this to 10%
IB.
KI0Stab: The stabilizing factor to prevent operation of the residual overcurrent start caused by an
unbalance or dissimilar CT behaviour in the event of high short circuit currents. Set this to 0.8.
REOverRLStart: To set the earth return compensation factor for resistance of the starting element.
R 1

E
R 2
L
IECEQUATION15052 V1 EN-US
XEOverXLStart: To set the earth return compensation factor for reactance of the starting element.
X 1

E
X 2
L
IECEQUATION15053 V1 EN-US
Direction
ArgNegRes: The angle for blinder in the second quadrant. Set this to 120 deg.
ArgDir: The angle of setting in the fourth quadrant. Set this to 15 deg.
Zone 1
OpZ1: Set this to On.
DirModeZ1: To set the zone 1 direction mode. Set this to Forward.
PhSelModeZ1: To enable the measuring loops of zone 1. Set this to Phsel logic.
LEModeZ1: To operate the load discrimination characteristic of zone 1. Set this to On.
LCModeZ1: To enable/disable the adaptive load compensation mode of zone 1. Set this to On.
X1FwZ1: To set the forward positive sequence reactance reach of zone 1 in Ohm/p. The
recommended setting is 90% of the protected line length.
Therefore, set the X1FwZ1 to 0.9 x 50.0 x 0.112 = 5.6 Ohm.
X1RvZ1: To set the reverse positive sequence impedance reach of zone 1 in Ohm/p. Set this to 5.6
Ohm.
REoverRLZ1: It provides zero sequence compensation for phase-to-earth faults.
R 1

E
R 2
L
IECEQUATION15052 V1 EN-US
Therefore, set this to 0.28.
XEoverXLZ1: It provides zero sequence compensation for phase-to-earth faults.
X 1

E
X 2
L
IECEQUATION15053 V1 EN-US
Railway application RER670
Application manual
 
 
R 1 . 0 151
   
   
 
0
1 1
 
 
R 2 . 0 097
1
 
 
X 1 . 0 298
   
  
 
0
1 1
 
 
X 2 . 0 112
1
 
 
R 1 . 0 151
       
 
0
1 1
 
 
R 2 . 0 097
1
 
 
X 1 . 0 298
   
  
 
0
1 1
 
 
X 2 . 0 112
1
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. 0 28

. 0 83
. 0 28

. 0 83
Section 7
Impedance protection
(Equation 26)
(Equation 27)
GUID-464CA6EE-24D9-4F19-972C-F1EE1D4B9FFE v4
GUID-7624CA36-5684-49B8-8A30-C265B72ABAF9 v2
(Equation 28)
(Equation 29)
125