61
6
F
2
S
0
8
5
0
≥
1
&
≥
1
≥
1
&
&
&
CB-OR
Z4
Z2
Z3
UVL
" ON"
NON VTF
PSB
ECH
WIT
100ms
S-TRIP
M-TRIP
20ms
CS
Phase
Selection
t
0
0
t
&
CRL
[ZONESEL]
"Z3"
"Z2"
[PSB-CR]
1
R1-CR
R2-CR
&
[
TERM
]
"2TERM"
+
≥
1
TREBK
≥
1
&
≥
1
TECCB
0.00 - 200.00s
t 0
TSBCT
0.00 – 1.00s
0 t
(
∗
) Note: Details of UVL
Signal No. Signal name Description
622: UVLS-AB A-B phase
623: UVLS-BC B-C phase
624: UVLS-CA C-A phase
628: UVLG-A A phase
629: UVLG-B B phase
630: UVLG-C C phase
(
∗
)
Figure 2.3.2.2 POP Scheme Logic
Setting
The following shows the setting elements necessary for the POP and their setting ranges. For the
settings of Z2, Z3 and UVC, refer to Section 2.3.1.
Element Range
Step Default Remarks
UVL
Weak infeed trip element
UVLS
50 - 100 V
1V
77V
Undervoltage detection (phase fault)
UVLG
10 - 60 V
1V
45V
Undervoltage detection (earth fault)
Z4S
0.01 - 50.00
Ω
0.01
Ω
8.00
Ω
Z4 reach
(0.1 – 250.0
Ω
0.1
Ω
40.0
Ω
) (*)
BRRS
0.10 - 20.00
Ω
0.01
Ω
5.10
Ω
Reverse right blinder reach
(0.5 - 100.0
Ω
0.1
Ω
25.5
Ω
)
Z4G
0.01 – 100.00
Ω
0.01
Ω
8.00
Ω
Z4 reach
(0.1 – 500.0
Ω
0.1
Ω
40.0
Ω
)
BRRG
0.10 - 20.00
Ω
0.01
Ω
5.10
Ω
Reverse right blinder reach
(0.5 - 100.0
Ω
0.1
Ω
25.5
Ω
)
TREBK
0.00 - 10.00s
0.01s
0.10s
Current reversal block time
TSBCT
0.00 – 1.00s
0.01s
0.10s
CRSCM
PUP/POP/UOP/BOP
POP
Carrier protection mode
DISCR OFF/ON
OFF
Distance carrier protection enable
ZONESEL
Z2/Z3
Z2
Overreaching element selection
PSB - CR
OFF/ON
ON
Power swing blocking
ECHO OFF/ON
ON
Echo
function
WKIT
OFF/ON
ON
Weak infeed trip function
(*) Ohmic values shown in the parentheses are in the case of 1 A rating. Other ohmic values are in the
case of 5 A rating.
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