Hitachi Relion 670 Series Applications Manual page 344

Section 15
Monitoring
1 phase
supply
V = V
IEC17000212 V1 EN-US
Figure 166:
The SystemType setting is set as 2Phase to operate the RWRFLO for single phase traction supply
systems. The analog input needed for this functionality is catenary voltage and catenary current.
The functionality provides the mentioned accuracies only for single track systems. For paralleling
tracks, the below reasons effects increases the in-accuracies in the algorithm:
• The impedance of the line will be changed due to paralleling
• The effect of remote in-feed to the fault through hair pin connections at paralleling points
TSS
R
IEC17000216 V1 EN-US
Figure 167:
• The effect of mutual impedance between the parallel lines changes the reactive impedance of
the line.
Application of BT based single-phase traction supply using SystemType =
BTCatenary
The fault location in BT based single-phase supply system can be estimated by setting the function
as BTCatenary.
In this system type, the function needs to be provided with loop impedances (resistance and
reactance) of each section. In this system, the line lengths are less, hence it is recommended to use
the minimum number of sections possible.
PHSELL2 should be connected to FALSE.
The line section details required to provide is the loop impedance (LineLengthx, R1Lx, and X1Lx,
where x is section number).
338
Booster
transformer
I
c
TSS
RER
c
I = I
c
Classical single phase feeding diagram
A
B
Local in
feed
Fault
Paralleling points diagram
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transformer
Aerial return conductor
Catenary
Locomotive
Paralleling
post
A
B
Remote in
feed
1MRK506375-UEN Rev. N
Booster
IEC17000212-1-en.vsdx
Paralleling
post
IEC17000216-1-en.vsdx
Railway application RER670
Application manual