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Line Data: Form #: QP44/01/F01 Page 1 of 2 Issue/Rev.: 1/a

This document contains settings and test results for a distance protection relay of type L8-b for a transmission line. It lists the voltage and current transformer ratios for the line, impedance values for the line and replica settings, and settings for the protection elements including impedance, directional, undervoltage, and timers. Test results are shown for reach, timing, directional performance, and alarms. The document is signed off by the foreman and engineer.

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Mohd Saleh
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31 views2 pages

Line Data: Form #: QP44/01/F01 Page 1 of 2 Issue/Rev.: 1/a

This document contains settings and test results for a distance protection relay of type L8-b for a transmission line. It lists the voltage and current transformer ratios for the line, impedance values for the line and replica settings, and settings for the protection elements including impedance, directional, undervoltage, and timers. Test results are shown for reach, timing, directional performance, and alarms. The document is signed off by the foreman and engineer.

Uploaded by

Mohd Saleh
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as DOC, PDF, TXT or read online on Scribd
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NEPCO Protection and Metering Dept.

Distance Protection

L8-b

Substation Relay Type L8-b


Line Serial No.

VT Ratio =
CT Ratio =
UeZ =

Xp = Rp = Zp =
Zp =
Line Data
L = km
R = Ohm
X = Ohm
Ro = Ohm
Xo = Ohm
Z = Ohm

Relay Setting
S31 = cos Ф =
Ko = K =

Impedance replica
S32 = K =
cos (theta) =

Setting transformer
CM4 = CM3 = HG32/F =
A/I = A/II =
B/I = B/II =

Under Voltage Relay


CUO = Comp.Chx = Xo =
cos (theta) =

Timers
PtaH =

Form #: QP44/01/F01 Page 1 of 2 Issue/Rev.: 1/a


NEPCO Protection and Metering Dept.
Distance Protection

4. Reach Test:
Switch- Measuring Range 1 Measuring Range 2
g Curve Measured %Z Measured %Z
Positio No. Sett. Ref. Sett. Ref.
HG %Z R S T HG %Z R S T
n
2 CM3
1 CM4

5. Timing Test:
Phase (s) Zone 1 Time (ms) Zone 2 Time (ms) Zone 3 Time (ms)
R–N
S–N
T–N
R–S
S–T
T –R

6. Directional check:

7. Alarm:

Foreman Name Eng. Name


Foreman Sign. Eng. Sign.
Date Date

Form #: QP44/01/F01 Page 2 of 2 Issue/Rev.: 1/a

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