Hitachi Relion 670 Series Applications Manual page 101

1MRK506375-UEN Rev. N
DirModeZ2: To set the zone 2 direction mode. It can be set to Non-directional, Forward and Reverse.
The Forward direction mode is set by default.
PhSelModeZ2: To enable the measuring loops of zone 2. It can be set to Phsel logic, Release L1E,
ReleaseL2E, Release PE, Release L1L2 and Release PE&PP modes. The default setting is Phsel
logic mode.
LCModeZ2: To enable/disable the adaptive load compensation mode of zone 2. It avoids
overreaching of the zone in to the next section in case of resistive fault due to remote end feed.
Generally, this setting is not needed for zone 2. The default setting is Off.
X1FwZ2: To set the forward positive sequence reactance reach of zone 2 in Ohm/p. The zone should
never underreach the next section. The recommended setting is 120% of the protected line length.
Impact of the mutual coupling should be considered for the double circuit lines.
X1RvZ2: To set the reverse positive sequence impedance reach of zone 2 in Ohm/p. It may be set
identical to X1FwZ2.
REoverRLZ2: To set the earth return compensation factor for resistance of zone 2. It provides zero
sequence compensation for phase-to-earth faults.
XEoverXLZ2: To set the earth return compensation factor for reactance of zone 2. It provides zero
sequence compensation for phase-to-earth faults.
RFPEFwZ2: To set the forward fault resistive reach in Ohm/p for the phase-to-earth faults in zone 2.
This may be set identical to zone 1 setting. In case of permissive overreach schemes used for short
lines, this has to be set higher than zone 1 resistive reach.
RFPERvZ2: To set the reverse fault resistive reach in Ohm/p for phase-to-earth faults in zone 2. This
may be set identical to zone 1 setting.
RFPPFwZ2: To set the forward fault resistive reach in Ohm/p for phase-to-phase faults in zone 2.
This may be set identical to zone 1 setting.
RFPPRvZ2: To set the reverse fault resistive reach in Ohm/p for phase-to-phase faults in zone 2.
This may be set identical to zone 1 setting.
TimerSelZ2: To set the zone timer selection mode of zone 2. i.e. Timers separated, Timers linked,
General start, PhSel start, Internal start and External start. The default setting is Timers separated.
OpModetPEZ2: To set the Off/On operation of the phase-to- earth timer of zone 2. The default setting
is Off.
tPEZ2: To set the time delay to trip for phase-to-earth faults in zone 2. It should be set to coordinate
with the clearance of adjacent circuit fault with in reach by the intended main protection or breaker
fail protection. The default setting is 0.4 s.
OpModetPPZ2: To set the Off/On operation of the phase-to-phase timer of zone 2. The default
setting is Off.
tPPZ2: To set the time delay to trip for phase-to-phase faults in zone 2. It should be set to coordinate
with the clearance of adjacent circuit fault with in reach by the intended main protection or breaker
fail protection. The default setting is 0.4 s.
Zone 3
OpZ3: For the Off/On operation of zone 3 and it is set to Off by default.
DirModeZ3: To set the zone 3 direction mode. It can be set to Non-directional, Forward and Reverse.
The Forward direction mode is set by default.
Railway application RER670
Application manual
© 2017 - 2023 Hitachi Energy. All rights reserved
Section 7
Impedance protection
GUID-F4F460B5-ECB1-413F-B00A-0977580BD737 v4
95