kbch120 relay testing with f6150

Knowledge Is PowerSM

Apparatus Maintenance and Power Management for Energy Delivery

Brief Introduction for Automated Relay Testing

Kamin DaveApplication Engineer (Protective Relaying)

DOBLE ENGINEERING COMPANY

Protection Relay Testing:

Testing of Differential Protection Relay type KBCH120

Relay Details: KBCH120

Two Differential Protection relaysAutomatic calculation for TAP values based on CTRSettings for Transformer & CT vector group compensations 2nd Harmonic Blocking during inrush period due to point on wave switching

Inrush Gap Detection Criterion

5th Harmonic Blocking for Over excitation phenomenaInverse Time Over Excitation Trip Characteristic

Relay Details: KBCH120MAKE : AREVAMODEL : KBCH120Relay Settings:Differential Element:

Rated MVA = 100HV = 220KVLV = 66KVTR VECTOR GROUP = YY0.CT CONNECTION = YYID> = 0.2PUTurn Point1 = 1.0PUID>> = 5.0PUSLP1 = 20% SLP2 = 80%In = 1A

Relay Details: KBCH120MAKE : AREVAMODEL : KBCH120Relay Settings:Differential Element:

HV CT Ratio = 300/1ALV CT Ratio = 1200/1ACF1 = 1.14CF2 = 1.37HV Vector Correction = YY0LV Vector Correction = YY0

Relay Details: KBCH120

FLC on TR Primary side:IFLC = (100*1000) / (1.7325*220)

= 262.36 AmpereFLC on TR Secondary side:

IFLC = (100*1000) / (1.7325*66)= 874.54 Ampere

CF1 = (1*300) / (262.36*1) = 1.14

CF2 = (1*1200) / (874.54*1) = 1.37

Relay Characteristic: Dual Slope

Idiff@SLP1 = (IBIAS)*(0.2) + (IS)

Idiff@SLP2 = (IS) + 0.2 + (Ibias - 1)*0.8

Test Equipment

• Make : DOBLE

• Model : F6150

Software

• F6TesT Version 2.18-1028

Test Circuit:

Source Configurations:Six current sources

Winding 1 currents

Winding 2 currents

• Pickup test for Winding1

• Pickup test for winding2

• Slope Characteristic test

Tests conducted:

Winding Pickup Test

Use “RAMP” Module

Winding Pickup Test:Pickup Test for Winding1 (WDG1):-Ipickup = (IS)*(1/CF1)

= (0.2)*0.8745= 0.1749A

Pickup Test for Winding2 (WDG2):-Ipickup = (IS)*(1/CF2)

= (0.2)*0.7287 = 0.1457A

Winding Pickup Test:

How to Create Test Plan???

Location Level

Add new Location or Double click on Existing Location

Relay Level

Add new Relay or Double click on Existing Relay

Right click on Mouse & Press “Append”& create New Testplan

Double click on “New test Plan”

Right click on “Mouse” & Press on “Append”& Create new Test Module

Select “RAMP” Module from list

Press on “OK” & Create New Test Definition

Select “6 Currents (Right bank)”

Press on “Yes”

WDG1 current sources

Enter Expected Value = 0.175A

Enter “Action”details

Select “Trigger”

Pickup Test: WDG1

Actual Test value = 0.197A

Click on “RUN”

Enter Expected Value = 0.165A

Enter “Action”details

Select “Trigger”

Pickup Test: WDG2

Actual Test value = 0.167A

Slope Characteristic Test

Use “DiffChar” Module

Slope Characteristic Test:

Star conn. Star conn.

How to Create Slope Characteristic???

Click on “Add” & select “Differential”

Select Bias current (Ibias) formula from list

Bias current Formula:Ibias = (IP+IS) / 2

YY0 YY0

Star conn. Star conn.YY0

SoftwareConfiguration

Amplitude Compensation

Click on “Pickup” Column & then after Click on “Modify”

Enter Pickup settingSay; 0.2

Select IBias Vs Idiff

Enter Slope 20% & 80% based on relay setting

SLP1=20%

SLP2=80%

How to AdjustSlope?

Click on “Close”

Right click on “Mouse”& click on “Append”

How to create New Test Module?

Select “DiffChar” Module from list

Double Click on Test Module & create New Test Definition

Select characteristic from list

Select elements

Enter Max. Test current (i.e. 12A)

Select Trigger (i.e. Open to Close)

Select test points on curve

click on Add Point to List

Test Points are added for Test

Right click on check box

Right Click on check box

Click on “RUN”

Red color shows Expected Curve & White color shows actual Curve

Test results

DOBLE ENGINEERING COMPANY305-SAKAR, O.P. ROADNR. ABS TOWERVADODARA-390 015INDIA. Tel:- +91 265 655 77 15EMAIL ID:- kdave@doble.comWebsite:- www.doble.com

kbch120 relay testing with f6150

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