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How to Test Distance Relay 7SA522

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ARABIA ELECTRIC LTD. Equipment

Distance Protection Relay Type 7SA522 Installation, Testing and Commissioning Site ReportCustomer Consultant Substation : SEC WRB : : Contract No.:

AL- BAWADI

110 / 13.8 K.V

S/S

1. General Information about the Relay:Panel No. 7SA522 SIEMENS CT RatioSecondary Rated Current ( In )

1200 / 1 A 1 A 110 / 0.1 KV 100 VNot Connected 110- 125 DCV

Relay Type Manufacturer SERIAL NO MLFB - No. Software Version Test Equipment

PT RatioSecondary Rated Voltage ( Un ) ( PH PH )

7SA522-4DB00-4QN4 4.61 OMICRON CMC 156

U4

Voltage Transformer is

DC. Auxiliary . Voltage

Frequency

Fn

60 Hz

2 . Mechanical Check and Visual InspectionItem 1 2 3 Description Check the name plate data according to the drawings and specifications Check for transportation damage and correct positioning Verify tightness of all connections Remarks

3. Electrical ChecksItem 1 2 3 4 5 6 7 Description All connections checked according to the wiring diagram Auxiliary power supply checked for rating and polarity CT shorting checked Indications checked Casing earthing checked Contact earthing checked Contact resistance of tripping and alarm checked Remarks

siemens Name: Signature: Date:CSD DAR ENGINEERING AL FANAR

Client: SEC - CSD Name: Signature: Date:Page 1 of 55

Consultant: Saudconsult Name: Signature: Date:ENGR. / SAFWAT SAAD AHMED ( 0563683052 )

ARABIA ELECTRIC LTD. Equipment

Distance Protection Relay Type 7SA522 Installation, Testing and Commissioning Site ReportCustomer Consultant Substation : SEC WRB : : Contract No.:

AL- BAWADI

110 / 13.8 K.V

S/S

4. General Functions in the Relay : FunctionPhase Distance Protection Earth Distance Protection Power Swing Detection Teleprotection For Distance Protection DTT Direct Transfer Trip Instantaneous High Speed SOTF Over Current Week Infeed ( Trip & / Or Echo ) Back Up Over Current Protection Earth Fault Over Current Protection Teleprotection For Earth Fault Over Current Auto Reclose Function Synchronism & Voltage Check Fault Locator

SelectedQuadrilateral Quadrilateral Enabled PUTT ( Z1B acceleration )/ POTT / BLOCKING / Un BLOCKING Disabled Enabled Enabled Time Over Current Curve IEC Time Over Current Curve IEC Disabled Not Applicable in this type Not Applicable in this type Enabled

5. Power System Data :OHL / UG Cable CT Star Point System Star point Line Length Line AngleX = Line Reactance( / Km ) Zero Sequence Compensation Factors Under Ground Cable Line Towards Line

Solid Earthed Km 85

RE / RL XE / XL

Z1 = Z2----- Z5 = Z1 = Z2----- Z5 =

siemens Name: Signature: Date:CSD DAR ENGINEERING AL FANAR

Client: SEC - CSD Name: Signature: Date:Page 2 of 55

Consultant: Saudconsult Name: Signature: Date:ENGR. / SAFWAT SAAD AHMED ( 0563683052 )

ARABIA ELECTRIC LTD. Equipment

Distance Protection Relay Type 7SA522 Installation, Testing and Commissioning Site ReportCustomer Consultant Substation : SEC WRB : : Contract No.:

AL- BAWADI

110 / 13.8 K.V

S/S

6. Secondary Injection Measurements :Setting: * 1201=Distance * Protection = OFF.

We should insure that:1 CT. & VT. Ratios are as setting in Power System Data 1 , Address ( 0203 ---0206 ) 2 From Setting Group A : Power System Data 2 , insure the value of % in : Address (1103 ) Measurement : Full Scale Voltage ( 100 % ) (1104 ) Measurement : Full Scale Current ( 100 % ) 3 The Direction of the Earthing is as per approved Drawings & as setting in Power System Data 1

( i ) If the direction of the Earthing is Towards the line ( Cable ): The Current is Lagging the Voltage by 45 ( As shown below )

V1 I1

= 57.73 V 0 = 1A - 45

V2 I2

= 57.73 V -120 = 1A -165

V3 I3

= 57.73 V +120 = 1A +75

( ii ) If the direction of the Earthing is Towards the Bus Bar: The Current is Leading the Voltage by 135 ( As shown below )

V1 = 57.73 V 0 I 1 = 1 A +135siemens Name: Signature: Date:CSD DAR ENGINEERING AL FANAR

V2 I2

= 57.73 V -120 = 1A

+15

V3 I3

= 57.73 V +120 = 1A

-105

Client: SEC - CSD Name: Signature: Date:Page 3 of 55

Consultant: Saudconsult Name: Signature: Date:ENGR. / SAFWAT SAAD AHMED ( 0563683052 )

ARABIA ELECTRIC LTD. Equipment

Distance Protection Relay Type 7SA522 Installation, Testing and Commissioning Site ReportCustomer Consultant Substation : SEC WRB : : Contract No.:

AL- BAWADI

110 / 13.8 K.V

S/S

90 135 I

V

0 180

I

siemens Name: Signature: Date:CSD DAR ENGINEERING AL FANAR

Client: SEC - CSD Name: Signature: Date:Page 4 of 55

Consultant: Saudconsult Name: Signature: Date:ENGR. / SAFWAT SAAD AHMED ( 0563683052 )

ARABIA ELECTRIC LTD. Equipment

Distance Protection Relay Type 7SA522 Installation, Testing and Commissioning Site ReportCustomer Consultant Substation : SEC WRB : : Contract No.:

AL- BAWADI

110 / 13.8 K.V

S/S

-45 270

Injected quantities: * Inject 3 Phases Currents & Voltages.

( i ) The angle between I & V is ( 0 )Phase - L1 57.73 V 0 1 A 0 Phase -L2 57.73 V -120 1A -120 Phase -L3 57.73 V +120 1A +120

( ii ) The angle between I & V is (- 45 )L1 57.73 V 0 1 A -45 L2 57.73 V -120 1A -165 L3 57.73 V +120 1A +75

( iii ) The angle between I & V is ( +135 )L1 57.73 V 0 1 A +135 siemens Name: Signature: Date:CSD DAR ENGINEERING AL FANAR

L2 57.73 V -120 1 A +15 Client: SEC - CSD Name: Signature: Date:Page 5 of 55

L3 57.73 V +120 1A -105 Consultant: Saudconsult Name: Signature: Date:ENGR. / SAFWAT SAAD AHMED ( 0563683052 )

ARABIA ELECTRIC LTD. Equipment

Distance Protection Relay Type 7SA522 Installation, Testing and Commissioning Site ReportCustomer Consultant Substation : SEC WRB : : Contract No.:

AL- BAWADI

110 / 13.8 K.V

S/S

Note : Print out from the Relay is Attached ( Primary & Secondary & % values )

Measured Values In The Relay

ParametersCurrent Current Current

At angle 00primarysecondary

At angle - 45oprimarysecondary

At angle + 135primarysecondary

% values

% values

% values

IL1 IL2 IL33I0

I1 - positive SequenceI2 - Negative Sequence Voltage UL1E Voltage UL2E Voltage UL3E Voltage UL12 Voltage UL21 Voltage UL31 3U0 U1 - positive Sequence U2 - Negative Sequence Apparent power(S) Active power(P) siemens Reactive power(Q) Frequency Name: Power FactorDate:CSD DAR ENGINEERING AL FANAR

Client: SEC - CSD Name: Signature: Date:Page 6 of 55

Consultant: Saudconsult Name: Signature: Date:ENGR. / SAFWAT SAAD AHMED ( 0563683052 )

Signature:

ARABIA ELECTRIC LTD. Equipment

Distance Protection Relay Type 7SA522 Installation, Testing and Commissioning Site ReportCustomer Consultant Substation : SEC WRB : : Contract No.:

AL- BAWADI

110 / 13.8 K.V

S/S

7. Impedance Secondary Measurements :

Note : Before starting this test , for easy calculation & to get correct readings In the relay configuration , Setting Group A , power system data 2Address (1116-1119) : setting for Zero Sequence Compensation FactorsRE / RL =0 & XE / XL = 0 ,

Also Zero Sequence Compensation Factors in the Tester setting should be Zero

( I ) Inject the impedance ( Z ) = 6 Calculate :R= Z x COS

with angle = 60 o ( in Forward Side ), X= Z x SIN ( Primary & Secondary )

Then measure the impedance ( Z )

( II ) Inject the impedance ( Z ) = 6 with angle = 240 o ( in Reverse Side ) Calculate :R= Z x COS ( Z ) , X= Z x SIN

Then measure the impedance Note :[

( Primary & Secondary )

C.T ratio = 1200 / 1

]

&

[

V.T ratio = 110 / 0.1 K.V

]

= 1200

= 1100

siemens Name: Signature: Date:CSD DAR ENGINEERING AL FANAR

Client: SEC - CSD Name: Signature: Date:Page 7 of 55

Consultant: Saudconsult Name: Signature: Date:ENGR. / SAFWAT SAAD AHMED ( 0563683052 )

ARABIA ELECTRIC LTD. Equipment

Distance Protection Relay Type 7SA522 Installation, Testing and Commissioning Site ReportCustomer Consultant Substation : SEC WRB : : Contract No.:

110 / 13.8 K.V S/S The Primary measured values = Secondary measured values X [ V.T ratio /

AL- BAWADI

C.T ratio ]= 0.92

Phase L1 - N L2 - N L3 - N L1 L2 L2 L3 L3 L1

Impedance RL1 XL1 RL2 XL2 RL3 XL3 RL12 XL12 RL23 XL23 RL31 XL31

Calculated

= 60o Measured ZPrimary Secondary

Calculated

= 240o Measured ZPrimary Secondary

Z 3 5.196 3 5.196 3 5.196 3 5.196 3 5.196 3 5.196

Z -3 -5.196 -3 -5.196 -3 -5.196 -3 -5.196 -3 -5.196 -3 -5.196

siemens Name: Signature: Date:CSD DAR ENGINEERING AL FANAR

Client: SEC - CSD Name: Signature: Date:Page 8 of 55

Consultant: Saudconsult Name: Signature: Date:ENGR. / SAFWAT SAAD AHMED ( 0563683052 )

ARABIA ELECTRIC LTD. Equipment

Distance Protection Relay Type 7SA522 Installation, Testing and Commissioning Site ReportCustomer Consultant Substation : SEC WRB : : Contract No.:

AL- BAWADI

110 / 13.8 K.V

S/S

8- Distance protection pick up threshold ( Fault Detection Test ):8.1- Phase Fault Current Threshold Detection ( I ph >

) Test

Address : ( 1202 )

*1201 : Distance Protection is = ON *1202 : Phase Current Threshold ( I ph > ) for Distance Measurement= 0.2A *1203 : 3Io Threshold fo

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