Relay Settings Calculations

Relay Settings Calculations

This technical report refers to the electrical protection of all 132kV switchgear. These settings may be reevaluated during the commissioning, according to actual and measured values. Protection selectivity is partly considered in this report and could be also re-evaluated. Names of parameters in this calculation may differ from those in the appropriate device.

Technical Data of the Lines

Main Line
Conductor Type ACSR Lynx
Length 27.8 km
Type ZM Type Tower
Positive sequence impedance0.1583 + j0.4004 (0.431 ∠68.4°) Ω/ km
Zero sequence impedance0.3246 + j1.228 (1.27 ∠75.2°) Ω/ km
Current capacity (A) 487
Next Line
Conductor TypeACSR Lynx
Length36 km
TypeZM Type Tower
Positive sequence impedance0.1583 + j0.4004 (0.431 ∠68.4°) Ω/ km
Zero sequence impedance0.3246 + j1.228 (1.27 ∠75.2°) Ω/ km
Current capacity (A)487

Protection Settings Calculations for Lines

SEL-311C Distance Protection Settings
Distance Zone
Non-Homogeneous Correction Angle
Load Impedance and Load Encroachment
Power Swing Detection/ Out of Step Detection
Switch on to Fault (SOTF)
Fuse failure scheme OR Loss of Potential (LOP)
SEL-351A Back-up Over Current Settings
Back up over current settings

Technical Data of the Power Transformers

Transformers-1
Type of coolingONAN / ONAF
Vector GroupDyn11
Rated Voltage HV V132000
Rated Voltage LV (V)11500
Full Load current HV ( A)87.48 / 113.72
Full Load current LV (A)1004.12 / 1305.35
Rated Power ( MVA)20 / 26
% impedance at the normal tap (12 no.)10.15% / 13.20 %
Type of tap changerOn load
the voltage at the maximum tap (V)145200
The voltage at the minimum tap (V)118800
Transformers- 2
Type of coolingONAN / ONAF
Vector GroupDyn11
Rated Voltage HV (V)132000
Rated Voltage LV (V)11500
Full Load current HV ( A)43.7 / 56.9
Full Load current LV (A)502 / 652.7
Rated Power ( MVA)10 / 13
% impedance at the normal tap (12 no.)10.15% / 13.20 %
Type of tap changerOn load
The voltage at the maximum tap (V)145200
The voltage at the minimum tap (V)118800

Protection Settings Calculations for Power Transformers

SEL-787 Transformer Differential Protection
Differential Pick-up
Slope-1 Setting
Slope-2 Setting
Differential Unrestrained (U87P (Un-restrained Differential Pick-up))
2nd HARMONIC
5th HARMONIC

SEL-351A Transformer HV Over Current
Pick-up Setting
51PP (for phase fault element)
51GP (for earth fault element)
Time Multiplier Setting

11 kV Outgoing Protection Settings

SEL-551C LT Over-Current and Earth Fault
CDG21 LT Neutral Standby AC series Earth Fault

To download, contact us: 

WhatsApp: +917303437524 / +989129613659 info@elecengg.com / saeed61850@gmail.com 

Our available courses:

DIgSILENT Relay Library

This document provides the DIgSILENT PowerFactory Relay library of various manufacturers.  

  • ABB DIgSILENT Relay Library
  • AEG DIgSILENT Relay Library
  • Alstom DIgSILENT Relay Library
  • Areva DIgSILENT Relay Library
  • Beckwith DIgSILENT Relay Library
  • Cooper Power Systems DIgSILENT Relay Library
  • GE DIgSILENT Relay Library
  • Generic relays DIgSILENT Relay Library
  • Merlin Gerin DIgSILENT Relay Library
  • Reyrolle DIgSILENT Relay Library
  • Schneider DIgSILENT Relay Library
  • Schweitzer DIgSILENT Relay Library
  • Siemens DIgSILENT Relay Library
  • Sprecher DIgSILENT Relay Library
  • Toshiba DIgSILENT Relay Library
  • VAMP DIgSILENT Relay Library
  • Westinghouse DIgSILENT Relay Library
  • ZIV DIgSILENT Relay Library

2DCC.dz
2TJM.dz
469.dz
489.dz

745.dz
7SA510.dz
7SA511.dz
7SA513.dz
7SA522.dz
7SA6.dz
7SD511.dz
7SD52.dz
7SD600.dz
7SD610.dz
7SJ41.dz
7SJ50.dz
7SJ511.dz
7SJ512.dz
7SJ531.dz
7SJ551.dz
7SJ600.dz
7SJ601.dz
7SJ602.dz
7SJ61.dz
7SJ62.dz
7SJ63.dz
7SJ64.dz
7SJ70.dz
7SJ73.dz
7SJ80.dz
7SK72.dz
7UM62X.dz
7UT512.dz
7UT6xx.dz
7VK1440.dz
8ZLS.dz
Areva P111.dz
Argus M.dz
Argus.dz
CAG.dz
CDD.dz
CO.dz
DFP 200.dz
DLPD.dz
DPU 2000R.dz
Duobias-M.dz
EPAC.dz
F21 Distance Mho.dz
F21 Distance Polygonal RX.dz
F21 Distance Polygonal.dz
F24 Overflux.dz
F27 Phase undervoltage.dz
F27D Positive sequence Undervoltage.dz
F32_F37 Under-_Over-Power.dz
F40 Loss of field.dz
F46 Unbalance overcurrent.dz
F47 Unbalance overvoltage.dz
F49 Thermal image.dz
F50_F51 Phase overcurrent.dz
F50BF Breaker failure.dz
F50N_F51N Neutral overcurrent.dz
F50V_F51V Voltage restraint overcurrent.dz
F59 Phase overvoltage.dz
F59D Positive sequence overvoltage.dz
F59N Neutral overvoltage.dz
F650.dz
F67 Phase directional.dz
F67_F50_F51 Phase directional overcurrent.dz
F67N Neutral directional.dz
F67N_F50N_F51N Neutral directional overcurrent.dz
F68 OOSPower Swing.dz
F78V Vector jump.dz
F79 Recloser.dz
F81 Frequency.dz
F81R Rate of Frequency change.dz
F87L Line Differential (angular 1 phase).dz
F87L Line Differential (angular 3 phase).dz
F87L Line Differential (magnitude).dz
F87REF Restricted Earth Fault.dz
F87T Transformer Differential.dz
Form 4C.dz
Form 5.dz
Form 6.dz
FX-FXA-FXB.dz
GAD.dz
GN3.dz
GRL100.dz
Hi-Lo.dz
IAC.dz
IFC.dz
IKT9.dz
IMPRS.dz
KCEG.dz
KCGG.dz
LFAA.dz
LFCB.dz
LZ92.dz
LZ96.dz
M3425.dz
MBCH.dz
MBCI.dz
MBCZ.dz
MCAG.dz
MCGG.dz
MCSU.dz
MCTI.dz
METI.dz
Micromho.dz
Motor protection sim.dz
Motor protection.dz
MVTR51.dz
MWTU14.dz
Ohmega3xx.dz
Ohmega4xx.dz
Optimho.dz
P114S.dz
P115.dz
P12x.dz
P13x.dz
P14x.dz
P211.dz
P220.dz
P341.dz
P34x.dz
P43x.dz
P44x.dz
P54x.dz
PD521.dz
PD531.dz
PD532.dz
PD551.dz
PD552.dz
PD932.dz
PR511.dz
PR512.dz
PS431.dz
PS441.dz
PS451.dz
PS462.dz
PXLN.dz
PXLP 3000.dz
Quadramho.dz

To download, contact us: info@elec-engg.com / saeed61850@gmail.com

RACID.dz
RADS-B.dz
RADS-C.dz
RAKZB.dz
RAZFE.dz
RAZOA.dz
RED 670.dz
REF 542+.dz
REF 550.dz
REF 601.dz
REF610.dz
REF615.dz
REG 216.dz
REG 670.dz
REJ 521.dz
REJ 523.dz
REJ 525.dz
REJ 527.dz
REJ 603.dz
REL 100.dz
REL 300.dz
REL 301.dz
REL 511.dz
REL 512.dz
REL 521.dz
REL 531.dz
REL 561.dz
REL 670.dz
REM 543.dz
REM 610.dz
RET 670.dz
RR3M.dz
RxAs52k.dz
RXIDF.dz
RXIDG.dz
RXIDK 2H.dz
RXIDK 4.dz
RXIG.dz
RXPDK.dz
RYDSA.dz
SACE ISOMAX S1-S8.dz
SACE PR121.dz
SACE PR122.dz
SACE PR123.dz
SACE PR221_PR211_PR212.dz
SACE PR231.dz
SACE PR33x.dz
SACE TMAX T1-T7.dz
SD14.dz
SD34.dz
SEL 251.dz
SEL 267.dz
SEL 279.dz
SEL 300G.dz
SEL 311A.dz
SEL 311B.dz
SEL 311C.dz
SEL 311L.dz
SEL 321.dz
SEL 351.dz
SEL 351R.dz
SEL 387.dz
SEL 411L.dz
SEL 421.dz
SEL 451.dz
SEL 487E.dz
SEL 501.dz
SEL 551.dz
SEL 587.dz
SEL 700G.dz
SEL 751.dz
SEPAM 10.dz
SEPAM x20.dz
SEPAM x4x.dz
SEPAM x8x.dz
Siemens 3WN1_3WS.dz
Siemens 3WN6.dz
Solkor M.dz
Solkor N.dz
Solkor R-Rf.dz
SPAD 346.dz
SPAF 140C.dz
SPAJ 110C.dz
SPAJ 111C.dz
SPAJ 115C.dz
SPAJ 131C.dz
SPAJ 135C.dz
SPAJ 140C.dz
SPAJ 141C.dz
SPAJ 142C.dz
SPAJ 144C.dz
SPAJ 160C.dz
SPAJ 32x.dz
SPAM 150C.dz
SPRECON E-P DS.dz
SPRECON-E DD.dz
SPRECON-E-P DSR.dz
TLS 1000.dz
UR D60.dz
UR F60.dz
UR G30.dz
UR G60.dz
UR L90.dz
VAMP 130.dz
VAMP 135.dz
VAMP 140.dz
VAMP 150.dz
VAMP 210.dz
VAMP 230.dz
VAMP 245.dz
VAMP 255.dz
VAMP 257.dz
VAMP 265.dz
VAMP 40.dz
VDG14.dz
VIP 30 – 35.dz
VIP 300.dz

To download, contact us: info@elecengg.com / saeed61850@gmail.com WhatsApp: +917303437524 / +989129613659

Our other courses:

Signal Matrix tool [PCM600]

  1. Right-click on IED and select Signal Matrix

2. now we will export selected (Binary inputs/ Binary outputs/ Analog inputs/ goose receive) to excel

3. collapse all rows/ columns and expand all rows/ columns

4. General filter and particular row/ column filter

5. You can change the user-defined for particular selected inputs/output of type binary/analog by clicking on properties and changing the name.

6. Map some goose receive signals by double click, create a connection between selected columns and rows.

7. Double click on the existing connection will disconnect the existing connection between the selected column and row.

8. Some redo and undo.

9. Try to find some signal using find. Find will Highlight the signal where it is.

10. Double click on a particular group of items in any rows or columns to hide or show.

11. Create an inverted signal in Binary outputs/inputs

12. You can see a Glue logic inverter created because of mapping “I” in the signal matrix.

13. flip column text to horizontal/ vertical for binary inputs/ binary outputs/analog inputs/goose receive

These pictures are part of our supplementary files for ABB PCM 600 training that is mixed with Oral explanations to help you understand this course. These auxiliary files have been gathered and attached to our ABB PCM600 training course, you can get more information by

Contact us :



Our completed Courses:

Migrate configuration [Migrate configuration tool] [PCM600 2.6]

  1. To migrate the IED version, Right-click on IED & select Migrate Configuration. IED Version Initial before MIgration: 1.2.3
  2. Let us migrate the IED version to 1.1.01

3. Click Continue to migrate. Undo is not possible in between or end of the migration. The old configuration will be backed up in the path…\PCMDataBases|PCMBackup

4. migration details will popup showing what are the changes that will be made in the migration process like function or hardware version/reversion changes or removed or not available.

5. click Next to proceed further

6. Migration process started, Progress bar showing the details, what are the steps taken in the migration process is also shown.

7. Shoe IED Configuration migration report is selected by default. Click Finish now.

8. Migration report will tell u, Worksheet Name, Type, Name, and what happened during migration u can save this report by clicking on the save icon for further reference.

9. open the Migration Report which is saved as a PDF

These pictures are part of our supplementary files for ABB PCM 600 training that is mix with Oral explanations to help you in the best way of understanding this course. These auxiliary files have been gathered and attached to our ABB PCM600 training course, you can get more information by

Contact us:

Helpful Excel Spreadsheets for Protection Engineers

With these spreadsheets below, you can make your endless calculations much easier!

  • Calculation of IDMT Over Current Relay Settings (50/51/50N/51N)
  • Calculation model for thermal relay Siemens 7SJ64
  • Motor Protection Relay Selection Curves
  • Over-current protection – INVERSE TIME O/C PROTECTION CALC-51(N) – Directional OC – Primary & secondary current calculation
  • Filter Design Calculation
  • P63x Differential CurrentsCalculation MiCOM P634/P633/P632
  • Calculating the operation currently in Bias Differential Relays MiCOM P633
  • POINT-TO-POINT METHOD OF SHORT CIRCUIT CALCULATIONS
  • SLOPE CALCULATION OF LINE DIFF RELAY P543
  • TMS Calculate

Contact us for more information and download: