Laporan Rla Sst1 Pltgu Grati

Laporan Pekerjaan RLA Transformator SST 1 Di PLTGU Grati.

Indonesia Power UBP Perak & Grati. PLTGU Perak & Grati, Situbondo Indonesia.

PT. SanggadelimaNusantara JasaInspeksiTeknik Workshop Jl. Raya Kodau Kav. P & K No. 92 Jatiasih – Jatimekar Jatimekar Bekasi - 17422 Tel : +62 21 849 00521/ 848 3465 Fax : +62 21 848 3404 Email : [email protected]

DAFTAR ISI

Oil Temp. :

35

ºC

Ambient temp.:

38

ºC

Lokasi :

PLTGU GRATI

Trafo :

SST 01

I.

Daftar Isi

1

I I.

Informasi Umum

2

I I I.

Pendahuluan

3

IV.

Analisa temuan

4

V.

Rekomendasi dan saran

4

VI.

Kesimpulan

i

Transformer Data

7

Transformer Elektrikal test

-

Tahanan Kontak

8

Tahanan DC Kumparan

9

Voltage Rasio

11

Tahanan Isolasi Kumparan Transformer

17

Insulation Power Factor dan Capacitance

20

Excitation current

22

Dielectric Frequency Response

23

Sweep Frequency Response Analysis

25

Bushing Current Transformer

35

Tahanan Pentahanan

36

Kinerja Cooling System dan Proteksi

Kalibrasi Thermometer

37

Motor kipas dan sistem proteksi

38

Oil Analysis Report Partial Discharges Report Remaining Life Time and Risk of Failure

Foto Dokumentasi

Sit Site Eng Engiinee neer :

Aan

Date

30/12/2014

Approval

:

Page

1

Herpekik

Informasi Umum

Manufactory

TLSN 7552

Year

Serial No.

N 421 894

Rated

No. of Phase

Temp. Rise Wdg./Oil

ONAF / ONAN

35

ºC

Ambient temp.:

38

ºC

Lokasi :

PLTGU GRATI

T ra f o :

SST 01

IEC 76

Standard

Type

Cooling Type

1995

30 / 24 MVA

50 Hz

Frequency

3 PHASE

Wdg.Insultion Class Class

-

52 / 57

Impedance Voltage

10.1 % / 8.1 %

Volume of oil

18 t

Vector Group

YNyn0(d)

LV side

6300 Volt

150000 Volt

TV side

-

HV side

Site Engineer : Approval

UNION

Oil Temp. :

:

56 t

Total weight

Aan

Date

30/12/2014

Herpekik

Page

2

Pendahuluan

Oil Temp. :

35

ºC

Ambient temp.

38

ºC

Lokasi : Trafo :

Tahanan Kontak

Sweep Frequency Response Analysis

Tahanan DC Kumparan

DGA Test

Voltage Rasio

Furan

Tahanan Isolasi Kumparan Transformer

DP test

Insulation Power Factor dan Capacitance

Functional

Dielectric Frequency Response

Termocalibration

PLTGU GRATI SST 01

Assessment dilakukan untuk mengetahui kondisi transformator berdasarkan pengujian keseluruhan seperti yang disebut diatas Tindakan pengujian dan analisa data dalam menentukan kondisi transformator adalah berdasarkan standar yang berlaku.

Site Engineer :

Aan

Date

30/12/2014

Approval

:

Page

3

Herpekik

Analisa dan Temuan

Oil Temp. :

35

ºC

Ambient temp.:

38

ºC

Lokasi :

PLTGU GRATI

Trafo :

SST 01

IV. Analisa dan temuan. Pada koneksi konduktor dari trafo ke jaringan tidak dilakukan pengujian tahanan kontak karena tidak terdapat akses untuk pengujian tersebut. -

Terdapat kebocoran / rembesan pada sisi LV sekitar bushing phasa R.

-

Terdapat rembesan oli di rele bucholz consevator trafo.

-

Hasil purifikasi minyak tidak juga dapat membuat hasil PI menjadi lebih baik.

-

Deviasi ratio pada tap 19 phasa W.

V. Saran -

Penggantian gasket untuk rembesan pada sisi LV semua phasa. ( Sudah dilakukan ).

-

Monitoring Karakteristik minyak insulasi setiap 6 bulan.

-

Dielectric Frequensi Response (DFR) mode Chg > 1%, Normal Ageing.

-

Perbaikan Instalasi motor kipas pendingin no.6.

-

Penggantian gasket pada rele bucholz conservator trafo. ( sudah dilakukan).

Jakarta,

PT.Sanggadelima Nusantara

(

) SITE TESTING ENGINEER

(

) ANALYS ENGINEER

Site Engineer :

Aan

Date

30/12/2014

Approval

Herpekik

Page

4

:

Analisa dan Temuan

Oil Temp. :

35

ºC

Ambient temp.:

38

ºC

Lokasi :

PLTGU GRATI

Trafo :

SST 01

Terdapat rembesan oli yang ada di bushing netral sisi LV.

Terdapat rembesan oli yang ada di sekitar rele bucholz.

bushing netral sisi LV setelah penggantian gasket.

rele bucholz setelah diganti gasket.

Site Engineer :

Aan

Date

30/12/2014

Approval

Herpekik

Page

5

:

35 ºC Oil Temp. : 38 ºC Ambient temp.: PLTGU GRATI Lokasi : SST 01 Trafo :

Analisa dan Temuan

tidak terdapat akses untuk pengukuran contac resistance clamp HV

Site Engineer :

Aan

Date

30/12/2014

Approval

Herpekik

Page

6

:

Transformer Data

Manufactory

UNION TLSN 7552

Year

Serial No.

N 421 894

Rated

No. of Phase Temp. Rise Wdg./Oil

ONAF / ONAN

35

ºC

Ambient temp.:

38

ºC

Lokasi :

PLTGU GRATI

Trafo :

SST 01

IEC 76

Standard

Type

Cooling Type

Oil Temp. :

1995

30 / 24 MVA 50 Hz

Frequency

3 PHASE

Wdg.Insultion Class

-

52 / 57

Impedance Voltage

10.1 % / 8.1 %

Volume of oil

18 t

Vector Group

YNyn0(d)

LV side

6300 Volt

150000 Volt

TV side

-

HV side

56 t

Total weight

Site Engineer :

Aan

Date

30/12/2014

Approval

Herpekik

Page

7

:

KESIMPULAN HASIL PENGUJIAN/PENGUKURAN TRANSFORMATOR CUSTOMER

UBP PERAK dan GRATI

MERK

:

UNION

NO. TRAFO :

LOKASI

PLTGU GRATI

DAYA

:

30 / 24 MVA

TANGGAL

No

KEGIATAN

SST 01 31-12-2014

ACUAN / STANDARD

KESIMPULAN

IP = 1,1 - 1,3 (IEEE std 62-1995)

Good

1

PENGUJIAN/PENGUKURAN TAHANAN ISOLASI & INDEKS POLARISASI BELITAN TRAFO

2

OIL CHARACTERISTIC TEST

14 Item Parameter (IEC 60422 dan IEC 61198)

Good

3

PENGUJIAN/PENGUKURAN KIMIA & KANDUNGAN GAS TERLARUT MINYAK ISOLASI

TDCG = H2, O2,C2H2,C2H4,N2,CO,CO2 (IEC 60567/ASTM D-3612)

Gas Ethylene dalam kondisi 2

4

PENGUJIAN/PENGUKURAN TAHANAN DC BELITAN TRAFO

Compare with factory test not exceed 5 % (IEEE std 62-1995)

Good

Tan δ at 20 °C < 0,5 % = good, 0,5 - 1 % = acceptable, > 1 % = Investigated (IEEE std 62-1995)

Good

Rasio toleransi ± 0,5 % dari nameplate (IEEE std 62-1995)

Good

Thermometer Standard Penyimpangan + 2,5%

Penurunan Kualitas

Name Plate R > 2 M Ohm Meger 500 V

Penurunan Kualitas

Check

Good

Compare with similar CT

Good

50 - 100 µΩ

Good

DL 911/2004 or CCF < 9 %

Fair

<1Ω

Good

PENGUJIAN/PENGUKURAN TANGEN DELTA 5

a. Transformer b. Bushing

6

PENGUJIAN/PENGUKURAN RATIO TEST

8

PENGUJIAN/PENGUKURAN TEMPERATUR/KALIBRASI

9

PENGUJIAN/PENGUKURAN MOTOR KIPAS TRAFO

10

PENGUJIAN/PENGUKU RAN RELAY BUCHOLZ, SUDDEN PRESSURE

11

PENGUJIAN/PENGUKURAN Rdc CT

12

PENGUKURAN TAHANAN KONTAK KLEM BUSHING

13

PENGUJIAN SWEEP FREQUENCY RESPONSE ANALYSER

14

PENGUKURAN TAHANAN PENTANAHAN

15

PENGUJIAN PARTIAL DISCHARGE

Acoustic Emission

Tidak ada

16

PENGUJIAN DIELECTRIC FREQUENCY RESPONSE ( DFR)

< 1 % (IEC 604 22)

NORMAL AGEING NORMAL AGEING, (Fair)

Kesimpulan

Polarisasi index lebih kecil dari nilai Pi dari sebelum difilter, tetapi dengan nilai insulasi resistance yang lebih tinggi dibandingkan sebelum difilter.

Saran

Perbaikan Instalasi motor kipas pendingin no.6

Usulan

on tor ng ara ter st minyak insulasi setiap 6 bulan.

PENANGGUNG JAWAB

( Herpekik Hargono )

-------------------------------

i

-----------------------------------

Contac Resistance

Oil Temp. :

35

ºC

Ambient temp.:

38

ºC

Lokasi :

PLTGU GRATI

Trafo :

SST 01

Contac Resistance Test ( μΩ )

Clamp Bushing LV

Before Condition

After Condition

R

204

190

S

533

204

T

474

150

N

6,8

3,3

Conclusion

Site Engineer : Aan

Date

30/12/2014

Approval

Page

8

:

Herpekik

35

Oil temp :

Ambient temp :

Winding Resistance Tap 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 RESULT:

After

Phasa R 1.625 1.607 1.588 1.57 1.55 1.532 1.513 1.494 1.475 1.457 1.438 1.42 1.4 1.38 1.368 1.35 1.331 1.313 1.294 1.275 1.256 1.238 1.218 1.2 1.181

Phasa S 1.62 1.602 1.583 1.564 1.545 1.526 1.507 1.489 1.469 1.451 1.432 1.413 1.394 1.372 1.361 1.343 1.323 1.305 1.285 1.267 1.247 1.229 1.21 1.191 1.172

38 º C

Lokasi :

PLTGU GRATI

Trafo :

SST 01

Before

Phasa T 1.622 1.604 1.585 1.567 1.547 1.529 1.51 1.491 1.472 1.454 1.435 1.416 1.397 1.375 1.365 1.347 1.328 1.309 1.29 1.272 1.253 1.234 1.215 1.197 1.178

Phasa R 1.689 1.649 1.629 1.611 1.593 1.572 1.553 1.537 1.515 1.496 1.475 1.458 1.437 1.415 1.403 1.385 1.37 1.347 1.327 1.307 1.289 1.27 1.25 1.229 1.211

Phasa S 1.662 1.649 1.632 1.613 1.599 1.567 1.555 1.531 1.515 1.493 1.474 1.459 1.434 1.414 1.401 1.383 1.362 1.342 1.321 1.301 1.283 1.264 1.244 1.225 1.205

Phasa T 1.675 1.649 1.627 1.603 1.595 1.574 1.555 1.536 1.516 1.497 1.477 1.455 1.438 1.417 1.402 1.388 1.362 1.350 1.319 1.307 1.288 1.264 1.245 1.230 1.205

GOOD

Note: Compare with factory test not exceed 5%

r-n

s-n

t-n

r-n

s-n

t-n

2.115

2.100

2.085

2.144

2.124

2.118

LV

Std :

ºC

IEC 60076-1

Instrument accuracy class

Site Engineer :

Aan

Date

30/12/2014

Approval :

Herpekik

Page

9

Oil temp :

35

Ambient temp :

Winding Resistance

38 º C

Lokasi :

PLTGU GRATI

Trafo :

SST 01

grafik winding resistance 1.8 1.6 1.4 1.2 1 0.8 0.6 0.4 0.2 0 0

5

10

15

20

PHS R Before

phs S before

phs T before

phs R after

phs S after

phs T after

25

2.16 2.14 2.12

1.21

2.1 2.08 2.06

2.04 r-n

s-n WR before

ºC

t-n

WR after

Site Engineer :

Aan

Date

30/12/2014

Approval :

Herpekik

Page

10

ºC Ambient temp.: 38 ºC PLTGU GRATI Lokasi : SST 01 Trafo : Oil Temp. :

Transformer Turn Ratio

35

Hasil tes Ratio PHASA R

Measured Ratio & % Error

Voltage (V) Tap Changer Position

Calculated Ratio

Before H1-H0

After

LV

1

172500

6300

27.381

27.434

0.19

27.438

0.21

2

170630

6300

27.084

27.134

0.18

27.137

0.20

3

168750

6300

26.786

26.833

0.18

26.836

0.19

4

166880

6300

26.489

26.533

0.17

26.536

0.18

5

165000

6300

26.190

26.233

0.16

26.236

0.17

6

163130

6300

25.894

25.932

0.15

25.935

0.16

7

161250

6300

25.595

25.632

0.14

25.635

0.16

8

159380

6300

25.298

25.321

0.09

25.335

0.14

9

157500

6300

25.000

25.030

0.12

25.036

0.14

10

155630

6300

24.703

24.730

0.11

24.734

0.12

11

153750

6300

24.405

24.429

0.10

24.434

0.12

12

151880

6300

24.108

24.129

0.09

24.133

0.10

13

150000

6300

23.810

23.828

0.08

23.834

0.10

14

148130

6300

23.513

23.528

0.07

23.533

0.09

15

146250

6300

23.214

23.228

0.06

23.234

0.08

16

144380

6300

22.917

22.928

0.05

22.933

0.07

17

142500

6300

22.619

22.628

0.04

22.634

0.07

18

140630

6300

22.322

22.327

0.02

22.331

0.04

19

138750

6300

22.024

22.027

0.01

22.033

0.04

20

136880

6300

21.727

21.727

0.00

21.732

0.02

21

135000

6300

21.429

21.426

-0.01

21.432

0.02

22

133130

6300

21.132

21.126

-0.03

21.132

0.00

23

131250

6300

20.833

20.826

-0.04

20.831

-0.01

24

129380

6300

20.537

20.526

-0.05

20.531

-0.03

25

127500

6300

20.238

20.226

-0.06

20.230

-0.04

X1-X2

% Err.

H1-H0

HV

X1-X2

% Err.

RESULT: GOOD Std : IEC 60076-1 10.3 Note : Tolerance of error ± 0.5 % Instrument accuracy class


:

Aan Herpekik

Date

12/30/2014

Page

11

Oil Temp. :

35

Ambient temp.:


38

PLTGU GRATI SST 01

Lokasi : Trafo :

0.25 0.20 0.15 i s a i v 0.10 e D r o r 0.05 e %

0.00

0

5

10

15

20

25

30

-0.05 -0.10 U-N before


:

U-N after

Aan

Date

12/30/2014

Herpekik

Page

12

ºC ºC


Oil Temp. :

35

ºC

Ambient temp.:

38

ºC

Lokasi :

PLTGU GRATI

Trafo :

SST 01

Hasil tes Ratio PHASA S


Calculated Ratio

Before H2-H0

After

LV

1

172500

6300

27.381

27.437

0.20

27.444

0.23

2

170630

6300

27.084

27.137

0.20

27.143

0.22

3

168750

6300

26.786

26.837

0.19

26.842

0.21

4

166880

6300

26.489

26.536

0.18

26.542

0.20

5

165000

6300

26.190

26.236

0.17

26.241

0.19

6

163130

6300

25.894

25.934

0.16

25.940

0.18

7

161250

6300

25.595

25.635

0.16

25.640

0.17

8

159380

6300

25.298

25.333

0.14

25.340

0.16

9

157500

6300

25.000

25.034

0.14

25.040

0.16

10

155630

6300

24.703

24.733

0.12

24.739

0.15

11

153750

6300

24.405

24.432

0.11

24.439

0.14

12

151880

6300

24.108

24.132

0.10

24.138

0.12

13

150000

6300

23.810

23.831

0.09

23.838

0.12

14

148130

6300

23.513

23.531

0.08

23.537

0.10

15

146250

6300

23.214

23.231

0.07

23.239

0.11

16

144380

6300

22.917

22.931

0.06

22.939

0.09

17

142500

6300

22.619

22.630

0.05

22.638

0.08

18

140630

6300

22.322

22.330

0.03

22.335

0.06

19

138750

6300

22.024

22.029

0.02

22.037

0.06

20

136880

6300

21.727

21.730

0.01

21.736

0.04

21

135000

6300

21.429

21.428

0.00

21.436

0.03

22

133130

6300

21.132

21.128

-0.02

21.135

0.02

23

131250

6300

20.833

20.828

-0.03

20.834

0.00

24

129380

6300

20.537

20.529

-0.04

20.534

-0.01

25

127500

6300

20.238

20.228

-0.05

20.234

-0.02

X2-X3

% Err.

H2-H0

HV

X2-X3

% Err.



:

Aan Herpekik

Date

30/12/2014

Page

13


Oil Temp. :

35

ºC

Ambient temp.:

38

ºC

Lokasi :

PLTGU GRATI

Trafo :

SST 01

0.25 0.20 0.15 i s a i v 0.10 e D r o r 0.05 e %

0.00

0

5

10

15

20

25

30

-0.05 -0.10 V-N before

Site Engineer : Approval :

V-N after

Aan

Date

30/12/2014

Herpekik

Page

14


Oil Temp. :

35

ºC

Ambient temp.:

38

ºC

Lokasi :

PLTGU GRATI

Trafo :

SST 01

Hasil tes Ratio PHASA T


Calculated Ratio

Before H2-H0

After

LV

1

172500

6300

27.381

27.437

0.20

27.443

0.23

2

170630

6300

27.084

27.137

0.20

27.142

0.21

3

168750

6300

26.786

26.834

0.18

26.842

0.21

4

166880

6300

26.489

26.536

0.18

26.542

0.20

5

165000

6300

26.190

26.235

0.17

26.241

0.19

6

163130

6300

25.894

25.934

0.16

25.940

0.18

7

161250

6300

25.595

25.634

0.15

25.640

0.17

8

159380

6300

25.298

25.333

0.14

25.340

0.16

9

157500

6300

25.000

25.033

0.13

25.040

0.16

10

155630

6300

24.703

24.732

0.12

24.739

0.15

11

153750

6300

24.405

24.432

0.11

24.439

0.14

12

151880

6300

24.108

24.132

0.10

24.139

0.13

13

150000

6300

23.810

23.831

0.09

23.838

0.12

14

148130

6300

23.513

23.530

0.07

23.537

0.10

15

146250

6300

23.214

23.231

0.07

23.239

0.11

16

144380

6300

22.917

22.930

0.05

22.938

0.09

17

142500

6300

22.619

22.629

0.04

22.638

0.08

18

140630

6300

22.322

22.330

0.03

22.337

0.07

19

138750

6300

22.024

22.029

0.02

22.038

0.06

20

136880

6300

21.727

21.729

0.01

21.736

0.04

21

135000

6300

21.429

21.428

0.00

21.437

0.04

22

133130

6300

21.132

21.128

-0.02

21.136

0.02

23

131250

6300

20.833

20.828

-0.03

20.835

0.01

24

129380

6300

20.537

20.528

-0.04

20.535

-0.01

25

127500

6300

20.238

20.228

-0.05

20.234

-0.02

X2-X3

% Err.

H2-H0

HV

X2-X3

% Err.



:

Aan Herpekik

Date

30/12/2014

Page

15


Oil Temp. :

35

ºC

Ambient temp.:

38

ºC

Lokasi :

PLTGU GRATI

Trafo :

SST 01

0.25 0.20 0.15 i s a i v 0.10 e D r o r 0.05 e %

0.00 0

5

10

15

20

25

30

-0.05 -0.10 W-N before


:

w-n after

Aan

Date

30/12/2014

Herpekik

Page

16

Insulation Resistance

Oil Temp :

35 º C

Ambient temp :

38 º C

Lokasi : Trafo :

PLTGU GRATI SST 01

Measurement Between (GΩ)

Time

Hasil Pengujian After

Hasil Pengujian Before

(Min)

HV/LV A

HV/G A

LV/G A

HV/LV B

HV/G B

LV/G B

1

4

3.79

2.11

3.21

2.07

1.93

10

8.52

6.07

4.19

7.83

3.8

4.33

PI

2.13

1.6

1.99

2.52

1.84

2.41

3 2.5

HV/LV A

2

HV/LV B HV/G A

1.5

HV/G B

1

LV/G A LV/G B

0.5

0 1

Std :

2

3

4

IEC 60076-3

Instrument accuracy class 1. Insulation Resistance Tester "Megger" MIT S1


:

Aan Herpekik

Date

30/12/2014

Page

17

35

Oil Temp :


38

Ambient temp : Lokasi : Trafo :

Hasil Pengujian After

SST 01

Hasil Pengujian Before

HV/LV A

HV/G A

LV/G A

HV/LV B

HV/G B

LV/G B

T1

4

3.79

2.11

3.21

2.07

1.93

T2

5.5

4.5

2.43

4.27

2.53

2.46

T3

6.16

4.89

2.74

5.05

2.8

2.87

T4

6.94

5.3

2.94

5.66

3.02

3.17

T5

7.43

5.4

3.1

6.13

3.19

3.42

T6

7.91

5.53

3.21

6.57

3.35

3.64

T7

8

5.74

3.31

6.93

3.48

3.83

T8

8.28

5.81

3.5

7.26

3.6

4.03

T9

8.32

6

4.01

7.58

3.7

4.2

T10

8.52

6.07

4.19

7.83

3.8

4.33

PI

2.13

1.6

1.99

2.52

1.84

2.41

9 8 7 ) Ω

6

G ( i s a 5 l o s I n 4 a n a h 3 a T

HV/LV A HV/G A LV/G A HV/LV B HV/G B

2

LV/G B

1 0 T1

T2

T3

T4

T5

T6

T7

T8

T9

T10

Menit

Site Engineer : Approval :

Aan

Herpekik

ºC

PLTGU GRATI

Measurement Between (GΩ) Time

ºC

Date

30/12/2014

Page

18


Oil Temp :

35 º C

Ambient temp :

38 º C

Lokasi :

PLTGU GRATI

Trafo :

SST 01

GRAFIK INSULATION RESISTANCE BEFORE - AFTER. 9 8 ) Ω

G ( i s a l o s I n a n a h a T

7 6 5 4

HV-LV after

3

HV-LV before

2 1 0 T1

T2

T3

T4

T5

T6

T7

T8

T9

T10

Menit

7 ) Ω


6 5 4 3

HV-G after

2

HV-G before

1 0 T1

T2

T3

T4

T5

T6

T7

T8

T9

T10

Menit

) Ω


5 4.5 4 3.5 3 2.5 2 1.5 1 0.5 0

LV-G after LV-G before

T1

T2

T3

T4

T5

T6

T7

T8

T9

T10

Menit

Site Engineer :

Aan

Approval

:

Herpekik

Date

30/12/2014

Page

19

Capacitance dan Power Factor

Oil temp :

35

ºC

Ambient Temp :

38

ºC

Lokasi :

PLTGU GRATI

Trafo :

SST 01

TRANSFORMER

I (mA)

Insulated Tested

Test Mode V (kV)

CHG+CHL

GST-GND

10

CHG

GSTg-RB

CHL

before

C (pF)

after

% Tan δ

P (W)

before

after

before

after

before

35.1347 35.1174

11196.20

11200

0.8730

0.8231

0.249

0.235

10

13.8066

13.795

4399.79

4403.06

0.3191

0.3023

0.231

0.233

UST-R

10

21.3959 21.3762

6808.07

6808.77

0.5474

0.4964

0.255

0.232

CHG+CHL

GST-GND

10

36.6969 35.1347

23496.70

11196.2

0.5313

0.8730

0.291

0.249

CHG

GSTg-RB

10

26.1761 13.8066

16701.60

4399.79

0.3946

0.3191

0.302

0.231

CHL

UST-R

10

10.684

6799.94

6808.07

0.1351

0.5474

0.253

0.255

21.3959

after

Grafik Tan Delta Before - After 0.35

0.3 0.25 % a t l e D n a T

0.2 0.15

0.1 0.05 0

1

2

3 before

4

5

6

after

Note : For new transformer Tan delta values is not exceed 0,5 % at temperature 20 °C For 15 years old, high-voltage 0,75 to 1.5 %. At temperature 20 °C. For bushing tranformer, tan delta values are compared with bushing nameplate

Site Engineer :

Aan

Date

30/12/2014

Approval :

Herpekik

Page

20

Oil temp : 35 ºC Ambient Temp : 38 ºC Lokasi : PLTGU GRATI Trafo : SST 01

Capacitance dan Power Factor BUSHING

Insulated Tested

I (mA)

C (pF)

% Tan δ

P (W)

Test Mode V (kV) before

after

before

after

before

after

before

after

C1 R

UST-R

10

1.53594

1.5369

491.595

490.635

0.043664

0.0523

0.285

0.247

C1 S

UST-R

10

1.53838 1.53841

490.266

490.151

0.042500

0.0588

0.307

0.341

C1 T

UST-R

10

1.53838 1.53413

489.979

489.939

0.040353

0.0482

0.262

0.382

C1 N

UST-R

10

1.54186 1.54042

491.466

491.277

0.031773

0.0381

0.206

0.315

Note : For bushing tranformer, tan delta values are compared with bushing nameplate.

Site Engineer :

Aan

Date

30/12/2014

Approval :

Herpekik

Page

21

Excitation Current

Oil Temp. :

35

ºC

Ambient temp.:

38

ºC

Lokasi :

PLTGU GRATI

Trafo :

SST 01

No.

Measured

Test Mode

V (kV)

I (mA)

L (H)

P (W)

1

R to N

UST-R

10

33.7942

1651.90

277.218

2

S to N

UST-R

10

24.0364

2655.13

208.162

3

T to N

UST-R

10

33.3346

1742.67

278.264

Note : The pattern of current is two similar high readings on the outer phases (phase A and C) and one lower reading on the center phase (Phase B) (IEEE std 62-1995)

Instrument accuracy class 1. Capacitance & Dissipation Factor Tester "Megger" Delta 4000


:

Aan

Date

30/12/2014

Herpekik

Page

22

DFR Measure Object

Moisture Content (%)

Amount of Barriers(%)

Amount of Spacers (%)

Oil Temp :

35 º C

Ambient Temp :

38 º C

Lokasi :

PLTGU GRATI

Trafo :

SST 01

Oil Conductivity (s/m)

Temperature (oC)

Before

After

Before

After

Before

After

Before

After

Before

After

Chl

1.0

0.2

46.7

32.9

46.7

28.0

6.43E-12

4.72E-12

35

40

Ch

2.1

1.4

23.2

2.7

23.2

24.9

3.63E-12

6.87E-12

35

40

Cl

1.0

0.6

36.2

16.8

36.2

49.2

6.71E-12

8.34E-12

35

40

GRAFIK CHL

BEFORE

RESULT:

AFTER

NORMAL AGEING

Std : IEC 60156 (1995 - 08) Note : moisture content in paper should be 0,5% - 1%

Instrument accuracy class 1. DFR Tester "Megger" IDAX 300


Aan. Catur

: Herpekik

Date

30/12/2014

Page

23

DFR

Oil Temp :

ºC

Ambient Temp :

ºC

Lokasi : Trafo :

PLTGU GRATI SST 01

GRAFIK CH

BEFORE

AFTER

GRAFIK CL

BEFORE

AFTER

Std : IEC 60156 (1995 - 08) Note : moisture moisture content in paper paper should be 0,5% - 1%

Instrument accuracy class 1. DFR Tester "Megger" IDAX 300

Site Site Eng Enginee ineerr : Approval

Aan. Aan. Catu Catur r

: Herpekik

Date

30/12/2014

Page

24

35

Oil Temp. :

Frequency Response Analyzer

38 º C Ambient temp.: PLTGU GRATI Lokasi : Trafo :

SST 01

GRAFIK SFRA HV TAP 1

Site ite Engin nginee eerr : Approval

Aan

: Herpekik

ºC

Date

30/12/2014

Page

25

35 º C Oil Temp. : 38 º C Ambient temp.: PLTGU GRATI Lokasi : SST 01 Trafo :


Kurva polar SFRA HV tap 1


Aan

: Herpekik

Date

30/12/2014

Page

26

35

Oil Temp. :



SST 01

GRAFIK SFRA HV TAP 13


Aan

: Herpekik

ºC

Date

30/12/2014

Page

27



Kurva polar SFRA HV tap 13


Aan

: Herpekik

Date

30/12/2014

Page

28

35

Oil Temp. :



SST 01

GRAFIK SFRA HV TAP 13 (short)

Instrument accuracy class 1. SFRA "Omicron"


Aan

: Herpekik

ºC

Date

30/12/2014

Page

29



Kurva polar SFRA HV tap 13 (short)


Aan

: Herpekik

Date

30/12/2014

Page

30

35

Oil Temp. :



SST 01

GRAFIK SFRA LV TAP 13



Aan

: Herpekik

ºC

Date

30/12/2014

Page

31



Kurva polar SFRA LV tap 13


Aan

: Herpekik

Date

30/12/2014

Page

32

35

Oil Temp. :


38 ºC Ambient temp.: PLTGU GRATI Lokasi : Trafo :

SST 01

GRAFIK SFRA LV TAP 13 (short)



:

ºC

Aan

Date

30/12/2014

Herpekik

Page

33

35 ºC Oil Temp. : 38 ºC Ambient temp.: PLTGU GRATI Lokasi : SST 01 Trafo :


Kurva polar SFRA LV tap 13 (short)


:

Aan

Date

30/12/2014

Herpekik

Page

34

Bushing Current Transformer

Std :

Oil Temp :

35

ºC

Ambient Temp :

38

ºC

Lokasi :

PLTGU GRATI

Trafo :

SST 01

Burden ( VA )

no CT

Core

Rdc (Ω)

Ratio

V Knee ( V )

I Knee ( A )

1

PHASA U

2.66961

150:0.99427

582.791

0.166092

30

4

PHASA U

2.6693

150:0.9951

590.811

0.158894

30

7

PHASA U

0.82815

750:5.02866

61.192

0.022333

30

10

PHASA U

0.69672

750:5.03148

92.906

0.171789

30

13

PHASA U

24.88123

3200:1.01779

1530.682

0.008276

30

16

PHASA U

25.25077

3200:1.01703

1536.916

0.008344

30

2

PHASA V

2.65833

150:0.99507

588.276

0.15786

30

5

PHASA V

2.62644

150:0.99246

587.686

0.174988

30

8

PHASA V

0.87209

750:5.02874

67.812

0.01809

30

11

PHASA V

0.65684

750:5.03511

78.012

0.163158

30

14

PHASA V

24.92096

3200:1.01557

1525.042

0.00825

30

17

PHASA V

25.26598

3200:1.01703

1507.6

0.008316

30

3

PHASA W

2.65879

150:0.99238

590.277

0.1874

30

6

PHASA W

2.70592

150:0.99254

583.191

0.202081

30

9

PHASA W

0.89252

750:5.02516

66.502

0.020161

30

12

PHASA W

0.72891

750:5.0326

93.996

0.165231

30

15

PHASA W

24.55377

3200:1.01531

1534.856

0.008281

30

18

PHASA W

24.93281

3200:1.01597

1419.998

0.0095

30

1

HV NETRAL

2.97164

150:0.98072

630.691

0.148497

30

1

LV NETRAL

7.8613

480:1.02117

716.397

0.0408

30

IEC 60076-3

Site Engineer :

Aan

Date

30/12/2014

Approval

Herpekik

Page

35

:

Ground Resistance

Object

Grounding Resistance (Ω)

Trafo Gnd

0.009

LA

1.048

Std :

Oil Temp. :

35

ºC

Ambient temp.:

38

ºC

Lokasi : Trafo :

PLTGU GRATI SST 01

Keterangan

IEC 60076-3

Instrument accuracy class 1. Earth Tester "DET 20 C" Megger

Site Engineer :

Aan

Date

30/12/2014

Approval

Herpekik

Page

36

:

Oil Temp. : Ambient temp.:

Thermometer Calibration

35

ºC

38

ºC

Lokasi :

PLTGU GRATI

Trafo :

SST 01

Merk "Messko"

Thermometer Standard

OTI

WTI 1

40

38

36

50

48

46

60

58

56

70

67

65

80

78

76

90

86

84

100

94

92

110

107

105

120

112

110

0

( C)

WTI 2

KETERANGAN

39 49 59 68 79 87 95 108 113

12 r n a 10 a d g n n a e t 8 d s n r a e t 6 a e d m e o 4 b r m e r p e 2 t

OTI WTI

WTI 2

0 1

2

3

4

5

6

7

8

9

Instrument accuracy class 1. Thermo Tester "ISOTech" Calisto

Site Engineer :

Aan

Date

30/12/2014

Approval

Herpekik

Page

37

:

Fan Motor Functional Test

Motor Kipas

Putaran (Rpm)

Arus start (A)

Fan 1

795.1

5.1

3.1

115

Fan 2

791.2

5.4

3.1

200

Fan 3

795.3

5.2

3.1

99.4

Fan 4

824.8

5.5

3.2

209

Fan 5

756.1

5.4

3.2

145

Fan 6

756.5

5.4

3.1

0.472

Fan 7

758.1

5.4

3.1

251

Fan 8

761.4

5.1

3.0

260

Oil Temp. :

35

ºC

Ambient temp.:

38

ºC

Lokasi :

PLTGU GRATI

Trafo :

SST 01

Arus Nominal Insulation (MΩ) (A)

Tested

Action

Conclusion

Fan

Cek

ok

Sudden Pressure ( Tank)

Cek

ok

Bucholz

Cek

ok

Sudden Pressure (OLTC)

Cek

ok

RESULT: FAN NO 6 BAD CONDITION

Std :

IEC 60076-3


:

Aan

Date

30/12/2014

Herpekik

Page

38

OIL ANALYSIS REPORT

PT. SANGGADELIMA NUSANTARA Service & Testing Engineering Division Kodau, Jl. Pendidikan Kav. PDK 92, Jatiasih -Jatimekar 17422 Bekasi Phone. 62 21 8296208 Fax. 62 21 83791906 E-mail. [email protected]

Insulating Oil Analysis Report Client Name

:

PT. INDONESIA POWER UBP GRATI

Site

:

PLTGU PERAK - GRATI - JAWA TIMUR

:

SST 1 (01BCT01)

Serial Number/ SN

:

N 421894

Rating Voltage

:

150 / 6.3 kV

Manufacture

:

Trafo Union

Sampling Date

:

02 Januari 2015

Analysis Date

:

19 Januari 2015

Delivery to Lab

:

07 Januari 2015

Client Ref. No : tba Sample ID : 003/SDN-JIT/LAB/I/2015

Sample Reference Data Transformer ID

Sample Type

:

Transformer Oil - Mineral

Sampling Point

:

Bottom Sampling Point

Test Result Degree of Polymerization ASTM D4243 Duplicate test were performed and each measurement value agreed to 2.5 % of mean. Extractio solvent is Ethylenediamine Copper II Hydroxide Solution.

Parameter

Unit

Result

%

781 <5

Mean DPv Total Dissolved Solid % Viscosity

o

Temp C

21.0

%

4.6

Average WT Sample

gm

0.05

Solution Time

hrs

18.0

Mean Efflux Time Solvent

sec

91.2

Mean Efflux Time Solution

sec

160.7

Water Content

General Information -

* All result(s) are on sample as received * Our third party compliance with ISO/IEC 17025. NATA accredited laboratory 17227

Page 41 of 54

PT. SANGGADELIMA NUSANTARA Service & Testing Engineering Division Kodau, Jl. Pendidikan Kav. PDK 92, Jatiasih -Jatimekar 17422 Bekasi Phone. 62 21 8296208 Fax. 62 21 83791906


:


Site

:


Transformer ID

:

Serial Number/ SN

:

SST 1 (01BCT01) N 421894

Rating Voltage

:

150 / 6.3 kV

Manufacture

:

Trafo Union


Sample Reference Data

Sampling Date

:

02 Januari 2015

Analysis Date

:

19 Januari 2015

Delivery to Lab

:

07 Januari 2015

Sample Type

:


Sampling Point

:


Test Result

Furan Analysis (IEC 61198)

Parameter

Method

Result

Unit

LIMIT Rat. Volt.

Good

Fair

Poor

Comments

Furan Test 2-Furfural

<10

2-FurfurylAlcohol

<10

2-AcetylFuran

<10

5-Methyl-2-Furfural

IEC 61198

●2-Furfural, estimated DP indicate normal aging rate.

ppb

<10

5-Hydroximethyl-2-Furfural

<10

Total Furans

<10

Estimated DP

800

TX Life Expetancy

100

All

** see standard below

%

General Information

* Furan Standard


Page 42 of 54


Insulating Oil Analysis Report Client Name Site

: :

PT. INDONESIA POWER UBP GRATI PLTGU PERAK - GRATI - JAWA TIMUR

Sample Reference Data Transformer ID

:

Serial Number/ SN Rating Voltage

: :

SST 1 (01BCT01) N 421894

Manufacture

:

Sampling Date

:

Analysis Date Delivery to Lab

: :


150 / 6.3 kV Trafo Union 02 Januari 2015 19 Januari 2015 07 Januari 2015

Sample Type

:


Sampling Point

:


Test Result

Dissolved Gas Analysis (DGA) - ASTM D3612-B Parameter Dissolved Gas Analysis (DGA) Hydrogen H2 Methane CH4 Acetylene C2H2 Ethylene Ethane

C2H4 C2H6

Carbon Monoxide Carbon Dioxide* Oxygen*

CO CO2 O2

Nitrogen*

N2

Total Dissolved Combustible Gas (TDCG)

Method

Result

ASTM D3612-B

<5 38 <1

ASTM D3612-B ASTM D3612-B ASTM D3612-B ASTM D3612-B ASTM D3612-B ASTM D3612-B ASTM D3612-B

Unit

91 10 84 971

ASTM D3612-B

< 500 6138

ASTM D3612-B

223

ppm

LIMIT Cond. 4 Cond. 1 Cond. 2 Cond. 3 IEEE C57.104-1991 Standard >1800 >1000 >80

100

101-700

701-1800

120 35 50

121-400 36-50 51-100

401-1000 51-80 101-200

65 350

66-100 351-570

101-150 571-1400

-

-

-

-

720

721-1920

1921-4630

>4630

25 00 -

Comments

●Warning Gases :

>200 >150

>1400 2 500 -4 000 4 001 -1000 0 >10000 ●Caution Gases : Ethylene

Note: * N2, O2, CO2 Not Include in combustible gas

General Information * Rating Voltage (kV) O = ˃ 400 A = 170-400 B = 72,5-170 C = ≤ 72,5

* All result(s) are on sample as received

Page 43 of 54



:


Site

:


Client Ref. No : tba

Transformer ID

:

Serial Number/ SN

:

SST 1 (01BCT01) N 421894

Rating Voltage

:

150 / 6.3 kV

Manufacture

:

Trafo Union

Sample ID : 003/SDN-JIT/LAB/I/2015

Sample Reference Data

Sampling Date

:

02 Januari 2015

Analysis Date

:

19 Januari 2015

Delivery to Lab

:

07 Januari 2015

Sample Type

:


Sampling Point

:


Test Result Insulating Oil Screen Test Parameter

Method

Result

ASTM D-1500 /IEC 60296

L2.5/ Clear (Amber)

-

IEC 60814

10.7

mg/kg

Unit

Insulating Oil Screen Test

Colour / Appearance

Water / Moisture Content

LIMIT Cond. 4 Cond. 1 Cond. 2 Cond. 3 IEEE C57.106-2006 Standard Rat. Volt.

Good

Fair

All

Clear

-

Dark

O,A

<5

5-10

> 10

B

<5

5-15

> 15

C

< 10

10-25

> 25

Poor

% Sat

IEEE C57

10.7

%

All

% M/DW

IEEE C57

1.0

%

All

0.02

mgKOH/g

O,A B C

< 0,10 < 0,10 < 0,15

0,1-0,15 0,10-0,20 0,15-0,15

39.6

mN/m

All O,A

> 28

22 - 28

< 22

> 60

50-60

< 50

B

> 50

40-50

< 40

C

> 40

30-40

< 30

Acidity or Neutralization Number Interfacial Tension / IFT

ASTM D-971

Breakdown Voltage

IEC 60156

75.0 35

Oil Temperature

kV

Comments

●All oil condition test(s) are within standard limits.

< 8.00 < 2,00 > 0,15 > 0,20 > 0,30

o

C

Specialised Test Sediment Content

AS 1883

0

% w/w

All

< 0,02

Sludge Content

AS 1883

0

% w/w

All

< 0,02

ASTM D93

160

°C

All

˃ 135

ASTM D1298

0.892

g/mL

All

< 0,895

ASTM D1275-B

Non Corrosive

-

All

Flash Point Density Corrosive Sulphur

IEC 60666

%

All

-

o

IEC 60247

0.0002

-

All

< 0,02

o

IEC 60247

0.0065

-

All

< 0,2

DBPC DLA (Dielectric Lost Angle) @ 25 C DLA (Dielectric Lost Angle) @ 90 C General Information *

-

<0.01

Rating Voltage (kV) O = ˃ 400 A = 170-400 B = 72,5-170 C = ≤ 72,5


Page 45 of 54

●Tarnish level "1B" Metals : Fe < 1; Pb < 1; Cu < 1; Mo < 1; Cr < 1; Al < 1; Ni < 1; Sn < 1; Si < 1; Na < 1; Zn < 1; Ca < 1; Mg < 1; P < 1.

PARTIAL DISCHARGES REPORT

Laporan Pengujian Partial Discharge Trafo 01BCT01_ SST 1

PT. INDONESIA POWER PERAK - GRATI Pasuruan – Jawa Timur

PT. Sanggadelima Nusantara Jasa Inspeksi Teknik Workshop Jl. Tebet Timur Dalam V No. 16 Jakarta Selatan 12820 – INDONESIA Tel : +62 21 829 6208, 835 0838 Fax : +62 21 837 91906 Email : [email protected]

I.

DAFTAR ISI

I.

Daftar Isi ........................................................................................................................................ 1

II.

Informasi Umum ........................................................................................................................ 2

III.

Pendahuluan ................................................................................................................................ 4

IV.

Analisa Temuan .......................................................................................................................... 4

V.

Garis Besar Pengujian ............................................................................................................. 6

VI.

Hasil Pengujian/Analisa Data ............................................................................................. 7

Lampiran ................................................................................................................................................... 17

II.

INFORMASI UMUM

DATA TRANSFORMATOR 01BCT01_SST1 PT. INDONESIA POWER PERAK - GRATI

Manufactory

Trafo - Union

Standard

Type

TLSN 7552

Year

Serial No.

N 421 894

Rated

1995

30 MVA

Cooling Type

ONAN/ONAF

No. of Phase

3

Wdg.Insultion Class

-

Temp. Rise Wdg./Oil

-

Impedance Voltage

-

Mass of oil

18 t

Frequency

IEC 76

Total weight

50 Hz

66 t

Vector Group

YNyn0(d)

LV side

6300 V

HV side

150000 V

TV side

-

PD MEASUREMENT DATA

Costumer

PT. INDONESIA POWER PERAK - GRATI

End User

PT. INDONESIA POWER PERAK - GRATI

Date of PD Measurement Type of PD Test PD Sensor Manufacturer External Connector Type of Synchronisation

Online Acoustic sensor & HFCT Techimp BNC PQ

III.

PENDAHULUAN

Pengujian yang dilakukan pada Transformator adalah sebagai berikut : Partial Discharge Online Test

Pengujian dilakukan untuk mengetahui kondisi insulasi transformator berdasarkan pengujian partial discharge seperti yang disebut diatas. Tindakan pengujian dan analisa data dalam menentukan kondisi transformator adalah berdasarkan standar yang berlaku. PD Internal : Dispersi kecil, berkumpul pada dasar PD Surface : Dispersi besar PD Corona : Frekuensi tinggi, pola berbeda dengan membentuk segitiga)

IV.

internal surface

(yang seringkali

ANALISA TEMUAN

Hasil PD pada Transformator menunjukkan hal-hal tersebut dibawah ini yang dibagi 4 kelas klasifikasi : 1. Untuk kelas 0 (class #0) pola sinyal menunjukkan adanya noise amplitude sangat kecil (Qmax95% = 12,9 mV). Tidak terdapat PD. 2. Untuk kelas 1 (class #1) pola sinyal menunjukkan adanya noise amplitude sangat kecil (Qmax95% = 12,7 mV). Tidak terdapat PD. 3. Untuk kelas 2 (class #2) pola sinyal menunjukkan adanya noise amplitude sangat kecil (Qmax95% = 12,9 mV). Tidak terdapat PD. 4. Untuk kelas 3 (class #3) pola sinyal menunjukkan adanya noise amplitude sangat kecil (Qmax95% = 12,9 mV). Tidak terdapat PD.

dengan dengan dengan dengan

Berdasarkan pengujian lapangan, pengambilan data, studi dan diagnosa hasil, maka diagnosa berdasarkan PD Assessment : 1. Dari keempat kelas (class#0, 1, 2 dan 3), dijelaskan bahwa tidak terdapat PD didalam trafo, melainkan hanya noise yang terekam.

Jakarta,

Sanggadelima Nusantara

[..............................................] Site Testing Engineer

[..............................................] Approved

V.

GARIS BESAR PENGUJIAN

Pengujian Partial Discharge Online Titik Uji Bodi Trafo Sensor Acoustic sensor, HFCT sensor Titik Pemasangan Bodi Trafo, grounding trafo Jenis Pengujian Online Test Hasil Uji Standar Pengujian Kesimpulan

Noise IEC 60034-27 Tidak Terdapat PD

PD Portable Equipment Techimp PPDC adalah instrument akuisisi Partial Discharge untuk beragam utiliti listrik (Motor, Generator, Transformer, Kabel, dsb). Metode diagnosa yang dapat diaplikasikan dengan alat ini adalah Noise Rejection, Cross Talk Rejection, Time-Frequency Mapping, PD Statistical Characteristics, PRPD Pattern, Waveform, & Pulse Spectrum Analysis. Spesifikasi Umum Techimp PPDC :

Techimp H.Q. Srl – Via Toscana 11/c – 40069 Zola Predosa (BO) Italy tel. +39.051.19986050 – Fax +39.051.19986099 – e-mail: [email protected] – web: www.techimp.com

Automatic Report Generated by PDProcessingII version: 1.00.19 General Info

Acquisition Date Acquired Pulses Acquisition time Applied Voltage Full Scale Phase Shift Pre Trigger Bandwidth Synch Frequency Synch RMS Time Length Comments

2015-01-14 04:15:30 20000 5.819 s 9.0 V 0.020 V 0 [degrees] 25 % W.B. 49.982 V 8.960 V 5 µs Iec FIlter --Calibration Status ---

Classification Info: This entire acquisition has been separated in 4 Classes. The following pages report analysis per each class. Filter: Off

File Name: C:\Data\PLTGU_Grati\HFCT_01BCT01_SST1.001.pd2


Classification Table Entire Acquisition Pattern (Amplitude; Phase)

Classification Map (EqTime; EqFrequency)

Class # 0

Class # 1

Class # 2

Class # 3


Class # 0

Qmax 95% [V]

Nw []

0.0129

37.5

Statistical Parameters Positive

Parameters

Negative

0.013 33.768 0.014 0.013 0.012 0.012 0.003 1191.631 6934 23.841 1.484 0.000 0.017 88.544 357.187 -1.469 268.594 88.565 271.406 -0.020 110.228

Alfa [V] Beta QMax [V] QMax95% [V] QMean [V] QMin [V] NQN [V] N/s [1/s] N Nw Skewness Q Std Dev [V] PhiSk Flattened Phiw Mean ° Delta Phi ° Phi Ku Phi Max ° Phi Mean ° Phi Min ° Phi Skewness Phi Dev Std

0.012 35.501 0.014 0.013 0.012 0.012 0.002 681.914 3968 13.643 1.212 0.000 -0.004 92.073 358.594 -1.372 268.594 91.987 270.000 -0.050 109.750


Waveform

Pulse Spectrum

Identification Generic ID Level


Class # 1

Qmax 95% [V]

Nw []

0.0127

2.3


Parameters

Negative

0.012 41.845 0.013 0.013 0.012 0.012 0.001 68.281 395 1.366 1.290 0.000 0.088 81.286 358.594 -1.399 268.594 81.269 270.000 0.110 108.757


0.012 50.436 0.013 0.012 0.012 0.012 0.000 47.711 276 0.955 1.537 0.000 0.054 87.945 357.187 -1.390 267.187 87.768 270.000 -0.008 106.911


Waveform

Pulse Spectrum



Class # 2

Qmax 95% [V]

Nw []

0.0129

11.9


Parameters

Negative

0.013 33.341 0.014 0.013 0.012 0.012 0.002 383.860 2231 7.680 1.527 0.000 -0.038 99.146 358.594 -1.276 268.594 99.160 270.000 -0.151 106.880


0.012 38.198 0.014 0.013 0.012 0.012 0.001 211.286 1228 4.227 1.088 0.000 -0.064 92.627 358.594 -1.159 268.594 92.695 270.000 -0.076 105.204


Waveform

Pulse Spectrum



Class # 3

Qmax 95% [V]

Nw []

0.0129

16.8


Parameters

Negative

0.013 32.621 0.014 0.013 0.012 0.012 0.002 527.707 3067 10.558 1.485 0.000 -0.010 91.432 358.594 -1.428 268.594 91.396 270.000 -0.008 109.926


0.012 36.900 0.014 0.013 0.012 0.012 0.001 312.976 1819 6.262 1.285 0.000 -0.052 98.943 358.594 -1.309 268.594 99.011 270.000 -0.073 107.823


Waveform

Pulse Spectrum


LAMPIRAN

REMAINING LIFE TIME AND RISK OF FAILURE

Perkiraan sisa umur ini diasumsikan dengan catatan bahwa tindakan dan perawatan terhadap komponen yang ada seperti bushing, tap changer, minyak dan lainnya dilakukan sesuai dengan petunjuk pada instruction manual pada komponen – komponen tersebut. Diasumsikan bahwa unit trafo ini di fabrikasi berdasarkan standard umum yang diharapkan bahwa umur trafo ini akan mencapai 200.000 jam dengan kondisi dalam keadaan operasi normal (sekitar 23 tahun). Berdasarkan data yang ada, trafo ini mengalami pengurangan umur yang normal. Tabel dibawah ini merupakan ranking assessment untuk dijadikan pertimbangan umur trafo tersebut: Fleet Assessment – Ranking* Failure Residual Life User & Network, + Design & Economical Diagnostic Visual Stress exp. Inspection Unit id

0 3 0 4 1 7

Unit No

2

t i n u e h t f o e g A

e f i l l a u d i s e R

5

2

t i e n n s l c i o t c i n u C o t e e a T f c p h e s m t W o r f a p g o s l o & n f i n a r i e c e V e i g e p c D n m B A m n a i o t – t g i r n l i i s o f e o O l c e p i O E D m L I

x

3

x

x

0

0

t n e t n o c 2 ) C / O C & t n e t n o c c i n a r u F n o i t a d a r g e d r e p a P

s i s y l a n A A R F

R F D

2

4

3

a t l e D n a T d n a e c n a t s i s e R n o i t a l u s n I , R T T , M R W

0

A G D

A G D g n i d n e r T

G C D T

n o i t i d n o C g n i h s u B

3

x

0

0

t n e t n o C s a G & l i O C T L O

t r o p e R l a c i r o t s i H

i s i s y l a n A R I

n o i t c e p s n I l a u s i V

Ranking Total

x

x

x

1

25

*Score: 0 – not critical / 5 – Very Critical / Score total: max 65 X: Tidak dihitung dalam evaluasi

Dengan mempertimbangkan umur trafo, ranking dari kondisi trafo, perkiraan umur yang masih tersisa dan resiko kegagalan pada trafo ini adalah 11 sampai 16 tahun dengan catatan bahwa corrective action berdasarkan rekomendasi dan manual dilaksanakan. Jika tidak maka konsekuensi pengurangan umur akan berkurang setengahnya dikarenakan factor seperti kelembaban, keasaman, oksigen maupun kegagalan dari komponen lainnya,

Foto Dokumentasi

Site Engineer :

Aan

Date

Approval

Herpekik

Page

:

Oil Temp. :

35

ºC

Ambient temp.:

38

ºC

Lokasi :

PLTGU GRATI

Trafo :

SST 01

January 2, 2015

Foto Dokumentasi

Site Engineer :

Aan

Date

Approval

Herpekik

Page

:

Oil Temp. :

35

ºC

Ambient temp.:

38

ºC

Lokasi :

PLTGU GRATI

Trafo :

SST 01

30/12/2014

Oil Temp. :

Foto Dokumentasi

Site Engineer :

Aan

Approval

:

Date

Herpekik

35 º C

Ambient temp.:

Page

38 º C

Lokasi :

PLTGU GRATI

Trafo :

SST 01

January 2, 2015

Foto Dokumentasi

Site Engineer :

Aan

Approval

:

Oil Temp. :

35 º C

Ambient temp.:

38 º C

Lokasi :

PLTGU GRATI

Trafo :

SST 01

Date

Herpekik

Page

30/12/2014

Foto Dokumentasi

Site Engineer :

Aan

Date

Approval

Herpekik

Page

:

Oil Temp. :

35

ºC

Ambient temp.:

38

ºC

Lokasi :

PLTGU GRATI

Trafo :

SST 01

30/12/2014

Foto Dokumentasi

Site Engineer :

Aan

Date

Approval

Herpekik

Page

:

Oil Temp. :

35

ºC

Ambient temp.:

38

ºC

Lokasi :

PLTGU GRATI

Trafo :

SST 01

30/12/2014

Oil Temp. :

Foto Dokumentasi

Site Engineer :

Aan

Approval

:

Date

Herpekik

35 º C

Ambient temp.:

Page

38 º C

Lokasi :

PLTGU GRATI

Trafo :

SST 01

30/12/2014

Laporan Rla Sst1 Pltgu Grati

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