TimerSelZ6: This is used to set the zone timer selection mode of zone 6. i.e. Timers
separated
, Timers linked, General start, PhSel start, Internal start and External
start. The default setting is Timers separated.
OpModetPEZ6: This is used to set the Off/On operation of the phase-to-earth timer
of zone 6. The default setting is Off.
tPEZ6: This is used to set the time delay to trip for phase-to-earth faults in zone 6.
It should be set to 0.0 s.
OpModetPPZ6: This is used to set the Off/On operation of the phase-to-phase timer
of zone 6. The default setting is Off.
tPPZ6: This is used to set the time delay to trip for phase-to-earth faults in zone 6.
It should be set to 0.0 s.
Phase Selection
GUID-62310709-49F4-4D60-869C-2145D574B459 v2
tI0: Delay time for the residual overcurrent start. Residual overcurrent start is
delayed by settable time delay tI0. The default setting is 0.2s.
ModeU0DetMin: This is used to enable/disable the neutral voltage shift protection.
The default setting is Off.
U0DetMin: This is used to set the minimum operate value for the neutral voltage
shift. The default value is 20% UB.
UDisp
GUID-1885B794-9F95-446B-A656-0A37AAB7F193 v2
OpModeU0: This is used for the Off/On operation of the neutral voltage
displacement logic. The default value is Off.
UMinDisp: This is used to check the neutral voltage displacement for single phase-
earth-faults occur in the system. The default setting is 150% UB.
tU0: This is the time delay to trip for the neutral voltage displacement start. The
default value is 5.0s.
7.2.3 Setting examples
7.2.3.1 Compensated earthed systems
GUID-C9010253-2D63-485B-ACF9-48166C03E017 v2
Example in Figure
42 illustrates how the distance protection ZRWPDIS protects a
1
10kV overhead transmission line. The earthing considered is compensated earthed
system.
Out of the six distance protection zones, only the zone 1, zone 2 and zone 3 are
considered in this example. Zones 4, 5 and 6 can be set on similar lines depending
on the application they are being used.
All the settings for impedance are in Ohms Primary.
1MRK 506 375-UEN A Section 7
Impedance protection
Railway application RER670 2.2 IEC 135
Application manual
To Next Page
Loading...
