This technical report refers to the electrical protection of all 132kV switchgear. These settings may be re-evaluated 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 impedance | 0.1583 + j0.4004 (0.431 ∠68.4°) Ω/ km |

Zero sequence impedance | 0.3246 + j1.228 (1.27 ∠75.2°) Ω/ km |

Current capacity (A) | 487 |

##### Next Line

Conductor Type | ACSR Lynx |

Length | 36 km |

Type | ZM Type Tower |

Positive sequence impedance | 0.1583 + j0.4004 (0.431 ∠68.4°) Ω/ km |

Zero sequence impedance | 0.3246 + 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 cooling | ONAN / ONAF |

Vector Group | Dyn11 |

Rated Voltage HV V | 132000 |

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 changer | On load |

the voltage at the maximum tap (V) | 145200 |

Voltage at the minimum tap (V) | 118800 |

##### Transformers – 2

Type of cooling | ONAN / ONAF |

Vector Group | Dyn11 |

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 changer | On load |

The voltage at the maximum tap (V) | 145200 |

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

### 11kV Outgoing Protection Settings

SEL-551C LT Over-Current and Earth Fault

CDG21 LT Neutral Standby AC series Earth Fault

I need transformer differential protection in micom and siemens siprotec relay

This page may help u : https://elec-engg.com/siemens-transformer-protection-relay-testing-with-quick-cmc/

thanks

thanks for your comment

i am looking at REM 615 – motor protection relay setting calculations, stuck up at relay/motor curve (hot/cold)?

on your email

Please share some relay setting calculations excels ,pdf or doble or RIO test kit calculation files if you have any so that we could purchase it on this website ?

THANKS …

sir

please share calculation sheet of GE D60 and SEL Distance elay.

do not have sheet of GE D60 and SEL Distance relay

SIR

I need line protection calculation 21/21G calculation sheet

Dear Sir,

I need line protection calculation (21/21G) using SEL-311c

Thanks!

please check your email

Please share relay calculation excel sheet

kindly check ur email for Relay Settings Calculations / Helpful Excel Spreadsheets for Protection Engineers

HOW CAN I DOWNLOAD?

Please check your email for Relay Settings Calculations

Please send relay settings calculation

check your email

I need protection grading, Simulation excel, for 33/11kV voltage level protection . OC (IDMT + HIGH STAGE) AND EF (same as OC) only.. please help.

cant download from this page.. please help…

has been sent to ur email pls check for Relay Settings Calculations

please check ur email for Helpful Excel Spreadsheets for Protection Engineers

May I get this sir?

would u plz check your email, dear?!

Sir,

How do we download the helpful spreadsheets on this site?

Pls check ur email

Could you please send me a copy of the PDF thank you.

Yes, pls check ur email

Dear sir, kindly share relay settings excel sheet

dear sir,

please share transformer protection relay settings calculation

Dear dinesh , pls check ur email Relay Settings Calculations

Please share relay calculation excel sheet

replied on ur email

Please sent to me for relay calculation

kindly check ur email

Dear Sir

How can i download ?

Dear keejeong, pls check ur email for Relay Settings Calculations

Please share relay calculation excel sheet

pls check ur email

Sir,

How do we download the helpful spreadsheets on this site?

pls check ur email

Kindly send the complete relay settings calculations

check your email, dear Shiva

Link for downloading relay setting calculation, please

check your email, Kire

Sir, how do i download these calculation on this site

pls check ur email for RELAY SETTINGS CALCULATIONS

How can i download it?

pls check your email

Please share relay calculation excel sheet

Details have been sent to your email with subject: Relay Settings Calculations / Helpful Excel Spreadsheets for Protection Engineers

Please share relay calculation excel sheet.

Relay Settings Calculations / Helpful Excel Spreadsheets for Protection Engineers

Kindly check your email, you should be a member of our website to access these files.

Please share relay calculation excel sheet….

yes, pls check your email

pls send me

This product is free for our customers only, and unfortunately, your email is not on our customer list. You can buy any of our training packs (DIGSI 4, DIGSI 5, IEC 61850, ETAP, PSCAD, …), then you can access our free files.

How i can download this document? I work at power company, my company use some protection relay, SEL, Siemens, Schneider, GE,…I need this document, pls send to my email. Thanks

kindly check your email.

Dear sir,

can you please send me calculation spreedsheats?

please check your email for detail