Siemens 7sd5

SITE ACCEPTANCE TEST RECORDContractor: Date:

14-11-2012 to20-11-2012

Description:

LINE DIFFERENTIAL RELAY- TYPE 7SD522Contract No:31033077/00

Site:

230/ 115KV MAHASEN BSPPanel/Bay Name:

=2DD/ 115KV ABUGHANIMA SS LINE SET-2 PANEL

1.RELAY CHARACTERISTICS

2. MECHANICAL CHECKS

Checking Results

Visual inspection OK

Conformity with drawings OK

Connection conformity with drawing OK

Case earthing connection OK

3.ELECTRICAL CHECKS

Checking Results

Indications checked. OK

Alarm contacts checked. OK

Trip contacts checked. OK

Reset of indications checked. OK

Tested by: NCC Witnessed by: SEC-P&TD-EP a g e | 1 of 15Name : VARUSAI MOHAMMED Name: RAMZI

Signature: Signature:NATIONAL CONTRACTING CO. LTD., T&D CENTER, P.O. BOX 90, AL-KHOBAR-31952, KSA

Panel Reference =2DD

Manufacturer SIEMENS

Type SIPROTEC 7SD522

Relay model (MLFB) 7SD5225-5DB99-7HM6-OS2A

Firmware version V 04.7.07

Serial number BF 1112072666

Rated current 5A

Rated voltage 100 – 125Vac

Rated frequency 50 / 60Hz

Auxiliary voltage 110-250Vdc


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4.OPERATIONAL MEASUREMENTS:

CTR : 1200 /5A PTR :115000/115V Distance Protection = 1201=OFF.

Applied : VPH - N = …66.4 V I PH = …5 AMP V-I = …30°.

S.N0 PARAMETER

MEASURED VALUES IN THE RELAY

PRIMARYMEASUREMENT

SECONDARYMEASUREMENT

PERCENT%

1. I A 1200A 4.99A 99.92. I B 1200A 4.99A 99.93. I C 1200A 4.99A 99.94. Ia=50,Ib=10180,Ic=0,3I0= 5A 1200A 4.99A 99.95. VA 66KV 66.38V 100.06. V B 66KV 66.38V 100.07. V C 66KV 66.43V 100.08. V A-B 115KV 114.99V 100.09. V B-C 115KV 115V 100.010. V C-A 115KV 115V 100.011. Va=46.390,Vb=66.39180, Vc=0,3U0=20V 20KV 20V 30.112. S 239MVA - 99.813. P 239MW - 99.814. Q -0MVAR - -0.115. FREQUENCY 60Hz 60Hz 100.016. P.F 0.99 0.99 -

5. DIRECTIONAL TEST: PHASE DISTANCE: QUAD, EARTH DISTANCE: QUAD,

DIRECTION

ANGLE

FROM TO

FORWARD 338.2° 120.1°

UNDEFINED 120.2° 149.9°

REVERSE 150° 300.1°

UNDEFINED 300.2° 338.1°




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6. FAULT DETECTION TEST: 2910: FUSE FAILURE MONITOR=OFF, 2901: MEASUREMENT SUPERVISION=OFF.

1201: ALL ZONES OF DISTANCE = ON,

1) PHASE OVER CURRENT DETECTION - I ph : 1202: I ph for Distance Measurement & INJECT CURRENT IN PHASE TO PHASE.

I ph Setting Pick up

0.5 A 0.508 A

3Io DETECTION:. ( set address 1509A : 3U0 and 3I0 , then inject morethan 5V in yellow phase , then vary current in R phase upto pickup)

3Io Setting Pick up

0.5 A0.504

2) 3 Vo DETECTION:( set address 1509A: 3U0 and 3I0, then inject morethan 0.5 A in Rphase, then vary voltage in yellow phase until pickup)

3Vo Setting Pick up

5.0 V 4.99 V




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4.2 Breaker Failure Phase Over Current.

PhaseCurrent Setting

(Amps)Pickup Amps

A 2 2.000

B 2 2.000

C 2 1.999

4.3Breaker Failure Operating Times Stage 1 & 2

Set current = 1 ASet Time (Secs) Measured (Secs)

T 1 T 2 T 1 T 2

1 2 1.02 2.04

1 2 1.02 2.03




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OVER VOLTAGE

V> measurement mode Ph-N

STAGE 1PHASE APPLIED

3PH VOLTAGE

SETTING PICK UP DROP OFF

A 63.5V 70 69.94 68.59

B 69.99 68.64

C 69.95 68.55

STAGE 2PHASE APPLIED

3PH VOLTAGE

SETTING PICK UP DROP OFF

A 63.5V 80 79.98 78.44

B 79.97 78.35

C 79.90` 78.41

TIMING TEST

V>PHASE APPLIED

3PH VOLTAGE

SETTING V< 1 V> 1 SETTING V< 1 V> 2

A 63.5V 1sec 1.03 0.5 sec 0.533 sec

B 1.03 0.526 sec

C 1.02 0.530 sec




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7. REACH TEST & TIMING TEST



ZONE

TIM

E s

ec

SE

TT

ING

AX

ES TYPE OF FAULTS

TIME m secA-N B-N C-N A-B B-C C-A ABC

Z1

FO

RW

AR

D

0

1 R

2.5 X

Z1B

FO

RW

AR

D

0.1

1.3 R

3.5 X

FREJA TEST REPORTS ATTACHED

Z2

FO

RW

AR

D

0.4

2 R

5 X

Z3

RE

VE

RS

E

1.0

- 3 R

- 6 X

Z4

FO

RW

AR

D

1.2

5 R

10 X

Z5

RE

VE

RS

E

1.5-5 R

-10 X

Z6

NO

N-D

IRE

CT

ION

AL

2.0

7 R

12 X

-7 R

-12 X


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8. BACK UP OVER CURRENT TEST:

1201: Distance protection =OFF 2601: Backup O/C Protection =ON 7211: B/O O/C General Trip

1. DEFINITE TIME TEST

FunctionSetting Measured Pickup values (A) Trip time @

2xIs (sec)Current (A) Time (sec) A-N B-N C-N

I 5.0 1.0 5.002 5.003 5.002 1.03Io 1 2.0 0.99 0.99 0.998 2.03I 10.0 0.0 10.0 10.0 10.0 0.031

I o 5.0 0.0 5.001 5.001 4.998 0.028

2. INVERSE TIME TEST: Ip = 5 A, Io = 2.5 A

Characteristics Phase T.M.SCalculated time

@ 2xIs (sec)Measured time

(sec)% ± Error

Normal Inverse

A

0.1 1.003

0.998 0.498B 0.998 0.498C 0.998 0.498N 0.999 0.398

Very Inverse

A

0.2 2.7

2.69 0.370B 2.69 0.370C 2.69 0.370N 2.70 0

Extremely Inverse

A

0.1 2.67

2.67 0B 2.66 0.374C 2.66 0.374N 2.67 0




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Long time Inverse

A

0.2 24

23.98 0.083B 23.95 0.208C 23.95 0.208N 24.05 0.208

9 . SOTF FUNTION:

9.1. SOTF SEPARATE FUNCTION: CB MANUAL CLOSE BINARY INPUT = 356.

ADDRESS NO 2404 = 12.5A, LED 09= 4295=SOTF TRIP SHOULD GLOW ON SOTF : OK

(INJECT 2.1A.) MORE THAN THE SETTING ADDRESS 2404 W/O BINARY INPUT : NO TRIP

(INJECT 2.1A.) MORE THAN THE SETTING ADDRESS 2404 + BINARY INPUT : TRIP@ 19.0 ms

(INJECT 1.9A) LESS THAN THE SETTING ADDRESS 2404 + BINARY INPUT: NO TRIP

9.2. SOTF WITH DISTANCE PROTECTION: (1232 = ZONE PICK UP)

( SOTF TRIP LED ASSIGNED . BUT ZONE TRIP TIME WILL BE BYPASSED)

SOTF WITH IN Z1 REACH T W/O SOTF = 14.9 ms T WITH SOTF = 15.6 ms

SOTF WITH Z2 REACH T W/O SOTF = 438.6 ms T WITH SOTF = 34.8 ms

SOTF WITH Z3 REACH T W/O SOTF = 0.814 secT WITH SOTF = 14.3 ms






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10. VT MCB TRIP :

ZONE 1: WITH OUT VT MCB TRIP : DISTANCE TRIPPED ZONE-1 WITH VT MCB TRIP : DISTANCE BLOCKED

ZONE 1B WITH OUT VT MCB TRIP : DISTANCE TRIPPRD ZONE-1B WITH VT MCB TRIP : DISTANCE BLOCKED






11. FUSE FAIL MONITOR:

A) 170: LED 12 = FUSE FAILURE, 2916A:=0 sec 2910: ON, 2911: 1PHASE SETTING=30V, 2912: 3PHASE CURRENT = 0.5A. Vrn = 31v,Vyn=Vbn=60V, SLOWLY DECREASE RN VOLTAGE & CHECK AT WHICH VOLTAGE FUSE FAIL LED APPEARS @ 29.80 V

B) 2913: 3 PHASE SETTING=5V, 168: LED 14 = VOLTAGE ABSENT DISTANCE BLOCKED

SPONTANEOUS INDICATION APPEARS ON FUSE FAILURE OPERATION. Vrn = Vyn=Vbn=60V, 3 PHASE CURRENT = 0.5A.




14-11-2012 to20-11-2012

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SLOWLY DECREASE 3 PHASE VOLTAGE & CHECK AT WHICH VOLTAGE FUSE FAIL LED APPEARS @ 5.01 V

12. DISTANCE TELEPROTECTION SCHEME CHECK:

A)PERMISSIVE UNDER REACH (PUTT)

4056: LED 13 =SIGNAL SEND, 4054: LED 14 =SIGNAL RECEIVES, 4006: CARRIER RECEIVE BI, 3850: TRIP WITH TELE PROTECTION SCHEME

SEND LOGIC CS = Z1 FAULT : OK TRIP LOGIC TRIP = Z1B FAULT + CR : OKTRIP TIME MEASURED : 14.3 msNO TRIP LOGIC= Z1B FAULT + NO CR : OK

B) PERMISSIVE OVER REACH (POTT) 4056: LED 13 =SIGNAL SEND, 4054: LED 14 =SIGNAL RECEIVE,

4006: CARRIER RECEIVE BI, 3850: TRIP WITH TELE PROTECTION SCHEME, SEND LOGIC = Z1B FAULT : OK TRIP LOGIC = Z1B FAULT+CR : OK

TRIP TIME MEASURED : 23.2 ms

WEAK INFEED =2501: ECHO ONLY

ECHO SEND SIGNAL IMMEDIATE WHEN CB OPEN & CR, : OK ECHO SEND SIGNAL AFTER TIME DELAY WHEN CB CLOSED & CR : OK

WEAK INFEED = 2501: ECHO & TRIP ONLY (WHEN CB CLOSES)

WHEN CB CLOSED +CR+ UNDER VOLTAGE CONDITIONS ARE SATISFIED V<25V. ECHO SENDS SIGNAL & TRIP AFTER TIME DELAY : OK WHEN CB CLOSED +CR+ UNDER VOLTAGE CONDITIONS NOT SATISFIED V>25V. ECHO SENDS SIGNAL ONLY AFTERTIME DELAY : OK

C) BLOCKING SCHEME

SEND LOGIC CS = Z3 FAULT (REVERSE) : OKTRIP LOGIC = Z1B FAULT+ NO CR : OKTRIP TIME MEASURED : 23.4 msNO TRIP LOGIC= Z1B FAULT+ CR : OK

D) DIRECT TRANSFER TRIP

TRIP OUTPUT = 4435, ALSO PUTT SCHEME TO BE SELECTED TO SEND SIGNAL IN ZONE - 1.

Tested by: NCC Witnessed by: SEC-P&TD-EP a g e | 10 of

15Name : VARUSAI MOHAMMED Name: RAMZI



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SEND LOGIC CS = (Z1) FAULTTRIP+CS : OK TRIPLOGIC CR = TRIP ; OK

13. POWER SWING SCHEME

1. ALL ZONE BLOCKING CHECKED : OK2. Z1,Z1B BLOCKING CHECKED : OK

14.FAULT LOCATOR CHECK:

Default Setting:Reactance (X) = 0.03 Ohms / KmLine Length = 100 KmRE/RL = 1.0 XE/XL =1.0

Percentage of length

X – Value Injected

Measured values in display (km)

RN YN BN RY YB BR RYB50 1.500Ω 50.2 50.1 50.1 50.1 50.1 50.2 50.2

75 2.250Ω 75.3 75.3 75.2 75.2 75.2 75.3 75.2

100 3.00Ω 100.3 100.4 100.4 100.1 100.3 100.1 100.2

15. EARTHFAULT DIRECTIONAL ELEMENT : Setting: 131: Definite time 132: Directional Comparison Pick Up

3164 : Min. Zero seq. voltage 3Uo for polarizing = 5V

3141 : 3Io pick up= 0.25A

Alpha(α) angle set = 338° Beta(β)angle set = 122° Measurements: Min.3Uo for polarizing = 4.96 V

3Io pickup = 0.249 A

( α) angle measured = 338.4°

(β ) angle measured = 121.3°





14-11-2012 to20-11-2012

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15.1) DEF TELEPROTECTION SCHEME:

DIRECTIONAL COMPARISON SCHEME Sending logic = E/F Forward Fault…… OK

Tripping time with CR = 30.4 ms

Tripping Time w/o CR = 1.23 sec address 3147 = 1.2 sec

BLOCKING SCHEME Sending logic =E/F Reverse Fault…… OK

Tripping Time with CR = 1.23 sec

Tripping Time w/o CR = 31.3 ms

16. DIFFERENTIAL PROTECTION (87L):

NOTE: The Sensitivity and timing tests are conduct with

-From HMI Display go to control menu. Tagging/ Diff test Mode: ON or by Digsi.

I-DIFF> …add (1210) Equation for Pickup Current:Irest/INB =set Idiff>/INB + permissible local CT error *I / IN1 + permissible remote CT error *I / IN2 + System errorI = Actual current flowing INB = the nominal operational current as parameterizedIN1 = the primary nominal current of the local current transformerIN2 = the primary nominal current of the current transformer of the remote end




DIFF.TEST Mode: ON


14-11-2012 to20-11-2012

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System error = Error due to frequency, synchronization and delay time difference errors = 1 – 2% of the current. As per manual page No. 548

Data for equation CT error =3% and system error =1%

16.1 Testing of 2* I-DIFF> trip threshold

PHASE SETTING IDIFF > (A)

Expected Pickup value(A)

Measured Pick Up Value (A)

Limits ± A

R

1.0 1.042 1.068 0.989 – 1.0941.5 1.563 1.588 1.484 – 1.6412.0 2.083 2.099 1.978 – 2.1872.5 2.604 2.628 2.473 – 2.734

Y

1.0 1.042 1.068 0.989 – 1.0941.5 1.563 1.588 1.484 – 1.6412.0 2.083 2.099 1.978 – 2.1872.5 2.604 2.624 2.473 – 2.734

B

1.0 1.042 1.065 0.989 – 1.0941.5 1.563 1.589 1.484 – 1.6412.0 2.083 2.098 1.978 – 2.1872.5 2.604 2.618 2.473 – 2.734

For determining pick up current the injection is gradually. Tolerance ±5% of setting

16.1.1 Timing test

I-DIFF> set = 2.5A 1134= current flow or manual close BI

PHASEInjected current

I-DIFF> * 2 (A)

T-DELAY I-DIFF>

Setting (ms)

Measured Time (ms)

Remarks

R 5.00.5 615.1 OK1.0 1110 OK1.5 1610 OK





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Y 5.00.5 618.0 OK1.0 1120 OK1.5 1620 OK

B 5.00.5 614 OK1.0 1120 OK1.5 1620 OK

NOTE: seal in time for all closers = 0.01sec min value ( Address : 1132A) Trip time expected = set time+0.01 sec

16.1.2 Under Switch on Condition:

PHASEI-DIFF>

SWITCH ON (A)

Expected pick up value (A)

Measured Pick Up Value (A)

Operating Time (ms)Setting=0.0

R

1.0 0.989 – 1.094 1.070 26.81.5 1.484 – 1.641 1.592 25.62.0 1.978 – 2.187 2.099 26.62.5 2.473 – 2.734 2.628 29.1

Y

1.0 0.989 – 1.094 1.071 26.51.5 1.484 – 1.641 1.590 29.52.0 1.978 – 2.187 2.095 28.92.5 2.473 – 2.734 2.626 25.3

B

1.0 0.989 – 1.094 1.061 25.11.5 1.484 – 1.641 1.591 25.52.0 1.978 – 2.187 2.100 29.82.5 2.473 – 2.734 2.620 26.8

*Note : Timing taken at pickup value

16.1.3 For seal in time effect on tripping

CASE ONE:1210 (I-DIFF>: pick up value) = 1.5 A1213 (I-DIF>SWITCH ON pick up value) = 5.0 A1134 (Line Closure) = manual close BI1132 (seal in time after all closures) = 0.1 sec1130 (pole open current threshold) less than (add.1210) = 0.5A





14-11-2012 to20-11-2012

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Manual close BI in state 1 for time more than address. 1132 after that inject current as per tables below in state 2

(*) inject current in between setting of (I-DIFF> and I-DIF>SWITCH ON)

This time is the summation of time in add.1217 plus add.1150 (0.3 sec).

(**)Inject current more than I-DIF>SWITCH ON condition

Setting I-DIFF> under switch on condition

Injected current ( 5.5 Amps)

R-N Y-N B-N

Time 25.9 msec 27.4 msec 27.0 msec

The time measured is the time in add 1217(0.0 sec)

a. I-DIFF>>…add (1233)

PHASE I-DIFF>> (A)Measured Pick Up Value (A)

Operating Time (ms)

Remarks

R

4 4.002 20.6 OK5 4.998 22.8 OK6 5.991 20.6 OK7 6.994 20.4 OK

Y 4 4.000 20.3 OK




Setting I-DIFF>1.5A

Injected current ( 2Amps )R-N Y-N B-N

Time 298.7msec 294.9msec 300.8msec


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5 4.998 20.9 OK6 5.987 22.3 OK7 7.000 20.9 OK

B

4 4.000 22.1 OK5 4.999 22.5 OK6 5.997 22.0 OK7 6.996 22.0 OK

For determining pick up current, the injection is not gradually

b. I-DIF>>SWITCHON …add (1235)

PHASEI-DIF>>

SWITCHON (A)

Measured Pick Up

Value (A)

Operating Time (ms) Remarks

R

4 3.999 20.6 OK5 4.996 28.1 OK6 5.998 20.8 OK7 6.961 20.4 OK

Y

4 3.998 30.4 OK5 4.996 20.7 OK6 5.994 22.1 OK7 6.994 21.5 OK

B

4 3.999 22.3 OK5 4.998 30.0 OK6 5.980 28.1 OK7 6.985 21.8 OK

16.1.4 Inrush Restraint Current: (second harmonic blocked test)

-choose add.2301 (Inrush Restraint) = ON-choose add.2302 (2nd harmonic in % of fundamental) = 15 %-choose add.2303 (cross block) = NO





14-11-2012 to20-11-2012

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a. Inject one phase current (1A-60HZ and 0.22A-120HZ) the relay will not trip because of Second harmonic inrush block.

2nd harmonic setting Non block Block value

15% 15.26% 15.28%

- 2303 (cross block) = YES- 2310 (time for cross block with 2nd harmonic) = 2.0 sec b. Inject one phase current (1A-60HZ and 0.22 A-120HZ) and another phase by(1A-60HZ). the relay will trip after the summation of time in (add.2310+add.1217) By cross blocking with2nd harmonic.

Cross block set time Actual time Checked 2 sec 2.03 sec OK

If Cross block setting is (no) so the tripping will be blocked only if the faulted phase has 2nd harmonic but if the another phase is the faulted phase without 2nd harmonic fault and healthy phase has 2nd harmonic then the tripping will not blocked and tripping will be blocked if the setting of cross block changed to yes so the tripping blocking happen for time 2310.

16.1.5 CHARGING CURRENT COMPENSATION : -





14-11-2012 to20-11-2012

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I C = 3.63 . 10 -6 . UN . FN . CB' . S

Where :-

I C :- Charging current to be calculated in ( A ) primary .

UN :- Nominal voltage of the network in ( KV ) primary .

FN :- Nominal frequency of the network .

CB' :- Per unit line length capacitance of the line in nF/km or nF/mile .

S :- Length of the line in km or miles .

* Charging current is checked in secondary values .

PHASE Current ( A ) Voltage ( V ) Calculated ICH ( % ) Measured ICH ( % )

R 0.00 66.40 1.25 1.2

Y 0.00 66.40 1.25 1.2

B 0.00 66.40 1.25 1.2

17. ADDITIONAL CHECKS:` 17.1 All binary inputs checked ….. OK 17.2. All binary outputs checked ….. OK 17.3 All LED checked ….. OK 17.4 Disturbance report verified ….. OK




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