ABB RER670 - Page 154

28.01
097.0
151.0
2
1
1
2
1
1
0

















R
R
R
R
L
E
IECEQUATION15052 V1 EN-US (Equation 30)
Therefore, set this to 0.28.
XEoverXLZ2: It provides zero sequence compensation for phase-to-earth faults.
83.01
112.0
298.0
2
1
1
2
1
1
0

















X
X
X
X
L
E
IECEQUATION15053 V1 EN-US (Equation 31)
Therefore, set this to 0.83.
RFPEFwZ2: It should be set to give maximum coverage considering the maximum
permissible load.
Since the RFPEFwStart is set to 50.16 Ohm to give more resistive coverage,
RFPEFwZ2 can be set at 0.8 x 50.16 = 40.13 Ohm.
RFPERvZ2: It may be set identical to RFPEFwZ2, which is 40.13 Ohm.
RFPPFwZ2: It may be set identical to RFPEFwZ2, which is 40.13 Ohm.
RFPPRvZ2: It may be set identical to RFPPFwZ2, which is 40.13 Ohm.
TimerSelZ2
: This is used to set the zone timer selection mode of zone 2. Set this to
Timers Separated.
OpModetPEZ2: Set this to On.
tPEZ2: Choose a time delay for zone 2 with margin to assure selectivity to zone 1
of adjacent lines. A delay time difference of 0.4s between the zones is sufficient.
Therefore, the time delay for zone 2 can be set to 0.4s.
OpModetPPZ2: Set this to On.
tPPZ2: Set this identical to tPEZ2, which is 0.4s.
Zone 3
GUID-4E4DD511-DBC3-4160-B327-5FB1C5F760DF v1
OpZ3: This is for operation Off/On of zone 3. Set this to On.
DirModeZ3: This is used to set the zone 3 direction mode. Set this to Forward.
PhSelModeZ3: This is used to enable the zone 3 measuring loops. Set this to Phsel
logic.
LEModeZ3: This is used to operate the load discrimination characteristic of zone 3.
Set this to On.
LCModeZ3: This is used to enable/disable load compensation mode for zone 3. Set
this to Off.
Section 7 1MRK 506 375-UEN A
Impedance protection
148 Railway application RER670 2.2 IEC
Application manual