Toshiba GRL100-701B Instruction Manual page 68

BRRS
0.10 - 20.00Ω
(0.5 - 100.0Ω
Z4G
0.01 - 100.00Ω
(0.1 – 500.0Ω
BRRG
0.10 - 20.00Ω
(0.5 - 100.0Ω
TCHD 0 - 50 ms
TREBK 0.00 - 10.00s
TSBCT 0.00 – 1.00s
CRSCM PUP/POP/UOP/BOP
DISCR OFF/ON
ZONESEL Z2/Z3
PSB - CR OFF/ON
(*) 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.
The following elements have fixed setting values or their settings are interlinked with other
elements listed above. So no setting operation is required.
Element Setting
Z4BS
Fixed to 1.5Ω
(Fixed to 7.5Ω) (*1)
Z4S θ(*2) Interlinked with Z3S θ
Z4BS θ(*3) Interlinked with ZBS θ
BRRS θ Fixed to 75°
BRLS Interlinked with BRRS
BRLS θ Interlinked with BFLS θ Angle of reverse left blinder BRLS
Z4G θ(*2) Interlinked with Z3G θ
Z4BG θ(*3) Interlinked with ZBG θ
BRRG θ Fixed to 75°
BRLG Interlinked with BRRG
BRLG θ Interlinked with BFLG θ Angle of reverse left blinder BRLG
(*1)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.
(*2) Valid only when mho-based characteristic is selected by ZS-C and ZG-C.
(*3) Valid only when quadrilateral characteristic is selected by ZS-C and ZG-C.
The reverse looking elements Z4 (G,S), BRR (G,S) and BRL (G,S) must always operate for
reverse faults for which the forward overreaching element of the remote end operates. The
following setting coordination is required.
When zone 2 is selected as the forward-looking element,
Z4 setting = 1.2 × (Zone 3 setting at remote end)
or
Z4 setting = α × (Zone 2 setting at remote end)
Note: α should be determined in consideration of the extension of zone 2 by zero-sequence
compensation.
When zone 3 is selected,
Z4 setting = 1.2 × (Zone 3 setting at remote end)
In both cases,
0.01Ω 5.10Ω
0.1Ω 25.5Ω)
0.01Ω 8.00Ω
0.1Ω 40.0Ω)
0.01Ω 5.10Ω
0.1Ω 25.5Ω)
1 ms 12 ms
0.01s 0.10s
0.01s 0.10s
POP
OFF
Z2
ON
Remarks
Z4 reverse offset reach
Characteristic angle of Z4 mho element
Angle of Z4 directional element
Angle of reverse right blinder BRRS
Reverse left blinder
Characteristic angle of Z4 mho element
Angle of Z4 directional element
Angle of reverse right blinder BRRG
Reverse left blinder
 67 
6 F 2 S 0 8 5 0
Reverse right blinder reach
Z4 reach
Reverse right blinder reach
Channel delay time
Current reversal block time
Carrier protection mode
Distance carrier protection enable
Overreaching element selection
Power swing blocking