Toshiba GRL100-701B Instruction Manual page 50

is always output. The condition for the UVC two-phase operation is to inhibit the Z1S from
overreaching in the event of a single-phase earth fault.
The UVC element is applied to the zone 1 distance elements.
EFL is an earth fault detection element, and UVPWI is a phase undervoltage relay to provide
countermeasures for overreaching of a leading-phase distance element at positive phase weak
infeed condition. These elements are applied to all earth fault distance elements. (Refer to
Appendix A.) The UVPWI can be disabled by the scheme switch [UVPWIEN].
2.3.1.3 Setting
The following shows the necessary distance protection elements and their setting ranges.
Element Range
Phase fault protection
ZS-C Mho - Quad
Z1S
0.01 - 50.00Ω
(0.10 - 250.00Ω
Z1S θ1
0° - 45°
Z1S θ2 45° - 90°
BFR1S
0.10 - 20.00Ω
(0.5 - 100.0Ω
Z2S
0.01 - 50.00Ω
(0.10 - 250.00Ω
BFR2S
0.10 - 20.00Ω
(0.5 - 100.0Ω
Z3S
0.01 - 50.00Ω
(0.1 – 250.0Ω
Z3S θ(*2) 45 - 90°
ZBS θ(*3) 0 - 45°
BFRS
0.10 - 20.00Ω
(0.5 - 100.0Ω
BFLS θ 90° - 135°
ZRS
0.01 - 50.00Ω
(0.1 – 250.0Ω
Z4S
0.01 - 50.00Ω
(0.1 – 250.0Ω
BRRS
0.10 - 20.00Ω
(0.5 - 100.0Ω
TZ1S 0.00 - 10.00 s
TZ2S 0.00 - 10.00 s
TZ3S 0.00 - 10.00 s
TZRS 0.00 - 10.00 s
Earth fault protection
ZG-C Mho - Quad
Z1G
0.01 - 50.00Ω
(0.10 - 250.00Ω
Z1G θ1 0° - 45°
Z1G θ2 45° - 90°
BFR1G
0.10 - 20.00Ω
(0.5 - 100.0Ω
Step Default Remarks
Mho Characteristic selection
Z1 reach
0.01Ω 1.60Ω
0.01Ω 8.00Ω) (*1)
1° 0° Gradient of reactance element
1° 90°
Forward right blinder reach for Z1
0.01Ω 5.10Ω
0.1Ω 25.5Ω)
Z2 reach
0.01Ω 3.00Ω
0.01Ω 15.00Ω)
Forward right blinder reach for Z2
0.01Ω 5.10Ω
0.1Ω 25.5Ω)
Z3 reach
0.01Ω 6.00Ω
0.1Ω 30.0Ω)
1° 85° Characteristic angle of mho element
1° 5° Angle of directional element
Forward right blinder reach for Z3
0.01Ω 5.10Ω
0.1Ω 25.5Ω)
1° 120° Forward left blinder angle
ZR reach
0.01Ω 4.00Ω
0.1Ω 20.0Ω)
Z4 reach
0.01Ω 8.00Ω
0.1Ω 40.0Ω)
Reverse right blinder reach
0.01Ω 5.10Ω
0.1Ω 25.5Ω)
0.01 s 0.00 s Zone 1 timer
0.01 s 0.30 s Zone 2 timer
0.01 s 0.40 s Zone 3 timer
0.01 s 0.60 s Zone R timer
Mho Characteristic selection
Z1 reach
0.01Ω 1.60Ω
0.01Ω 8.00Ω)
1° 0° Gradient of reactance element
1° 90°
Forward right blinder reach for Z1
0.01Ω 5.10Ω
0.1Ω 25.5Ω)
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