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DATA – DATA

PLTA IR.H.DJUANDA – JATILUHUR

1. Data Pusat Pembangkit

a) Hidrologi

Luas daerah tangkapan hujan 4500 Km2 Curah hujan tahunan rata-rata 2600 mm Aliran tahunan rata-rata 5,5 m i l y a r m3

Maksimum 7,2 m i l y a r m3 Minimum 3,9 m i l y a r m3

Debit tahunan rata-rata 175 m3 / detik b) Bendungan

Jenis : rockfill, dengan inti kedap air Elevasi puncak 114,5 m Panjang puncak 1200 m Lebar puncak 10 m Tinggi dari dasar bendungan 100 m Lebar kaki (maksimum, membujur) 600 m Volume 9.100.000 m3

- W a d u k

Duga muka air : normal 107 m Maksimum 111,5 m Minimum 75 m

Volume air waduk pada duga 107 m : 3 m i l y a r m3 Volume air waduk pada duga 75 m : 960 j u t a m3 Luas permukaan air waduk pada duga 107 m: 83 Km2

c) M e n a r a

Bentuk : Silinder, dengan sumbu vertical Konstruksi : beton Lokasi : pada lereng bendungan sisi hulu

(di dalam air waduk) Tinggi (dari dasar) : 110 m Diameter luar : 90 m Tebal bagian atas : 3,5 m Elevasi puncak : 144,5 m

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d) Sarana penyaluran air dari waduk

Jendela Pelimpas

Lokasi : Sekeliling bangunan menara Elevasi pelimpas : 107 m Kapasitas pelimpas 3000 m3 / detik

2 Buah Katup Hollow Jet

Lokasi : Sisi kiri dan kanan Elevasi sumbu katup : 49 m Kapasitas : 270 m3 / detik

(masing-masing untuk duga muka air 107 m) Diameter : 4000 mm

6 Buah Turbin

Kapasitas (tiap turbin) 46,7 m3 / detik Ukuran pintu pengambilan 5 x 2,40 m Duga dasar pintu : Satuan I – VI 65 m Satuan II – III – IV – V 62,70 m

Air dari jendela pelimpas sisi kanan, katup hollow jet kanan, dan turbin satuan I – II – III dialirkan melalui saluran buang kanan. Dari jendela pelimpas kiri, katup hollow jet kiri dan turbin satuan IV – V – VI melalui saluran buang kiri. Air dari turbin Bantu dapat dialirkan melaluio saluran buang kiri atau kanan. Kapasitas total saluran buang kiri dan kanan 3000 m3 / detik.

e) Saluran Air

Pipa pesat Jumlah 6 Diameter 3,25 m Panjang 65 m Tebal 20 mm Bahan : pelat baja AQ UNI 815 (open hearth) Kapasitas 47 m3 /detik Letak : vertical (dalam beton dinding menara)

Pipa Pelepas tekanan

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Jumlah 6 Diameter 1 m Bahan : beton Letak : Vertikal (dalam dinding menara sampai elevasi

114,50 m)

Saluran Buang

Jumlah 2 Diameter 11 m Kapasitas (total) 3000 m3 / detik Bahan beton bertulang

f) Gedung Pusat Pembangkit

Jenis : bawah tanah (bawah air) Bentuk : cincin, di dasar bangunan Menara Kapasitas alat angkat 110 Ton + 10 Ton & 10 Ton

g) Pusat Pembangkit

Duga muka air hulu (waduk) : Normal 107 m Maksimum 111,5 m Minimum 75 m

Duga muka air hilir : Satu Unit Operasi 26,5 m Dua Unit Operasi 26,75 m Tiga Unit Operasi 27 m Empat Unit Operasi 27,25 m Lima Unit Operasi 27,50 m Enam Unit Operasi 27,75 m

Elevasi Turbin 20,50 m Jumlah satuan (unit) 6 Kapasitas terpasang 186,5 MW

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T U R B I N OPERATING CONDITION

Maximum net head 80,20 m Rated net head 77 m Minimum net head 48 m Maximum net head for 1 % of time 55 m Head losses 0,50 m Tail level with :

One turbine in operation 26,50 m Two turbine in operation 26,75 m

Three turbine in operation 27,00 m Four turbine in operation 27,25 m Five turbine in operation 27,50 m Six turbine in operation 27,75 m

Turbin Manufacturer N E Y R P I C Type Francis turbines Direction of rotation Clockwise

(viewed from above) Rated output 32,3 MW Rated speed 272,7 rpm Rated head 77 m Turbine discharge at full opening

And rated head 46,7 m3 / sec Maximum runway speed 590 rpm Flywheel effect of turbine rotating part 900 tm2 Maximum hydraulic thrust 90 tons Discharge diameter of runner 2340 mm Distributor centerline elevation 20,50 m Weight of runner 7 tons Weight of rotating parts 15 tons

R U N N E R

Nama Pabrik N E Y R P I C J e n i s Francis Jumlah terpasang 5 Daya nominal ( tinggi hidrolik 77 m

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Putaran 272,2 rpm Daya maksimum Kecepatan putar 272,7 rpm Ukuran :

Diameter bagian bawah 2420 mm h7 Diameter bagian atas 1963 mm h7 Tinggi 1390 mm

Jumlah blade 13 Berat :

Runner Crown and Cone 2155 Kg. Runner Band 1560 Kg Runner Blades 3235 Kg Berat total 6950 Kg.

MATERIAL : CASR STEEL – Z 5 CN 12 - 04 – M – GRADE A MECHANICAL STEEL CHARACTERISTICS :

Rp 0 . 2 = ≥≥≥≥ 550 MPA Rm = 750 a 930 A 5d = ≥≥≥≥ 15 % IMPACT TEST :

Test Temperature = 00 C KV Moyene de 3 = ≥≥≥≥ 32 ϑϑϑϑ

KV Mini ind = 21,3 ϑϑϑϑ Efficiencies

Net Head Output at full Effciencies under partial loads ( % )

Openings (m) ( kW ) 10/10 9/10 8/10 7/10 6/10 5/10 80 34.000 91,9 94,1 93,6 92,4 90,8 86,5 77 (*) 32300 (**) 92,0 94,2 93,8 92,5 90,9 86,8

66 26000 91,8 94,3 93,3 91,6 90,1 86,4 55 19200 90,2 91,6 89,9 88,6 86,8 82,6 48 14600 87,3 85,9 83,7 83,7 80,8 75,5

Sistem Injeksi Udara Nama Pabrik N E Y R P I C Jumlah 6 Katup Balik :

Jenis B o l a Bahan Alumunium Diameter 150 mm

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Perapat Poros

Nama Pabrik N E Y R P I C Jumlah 5 set Bahan K a r b o n Jumlah segmen per set 16 Debit air pendingin 1 Liter / detik Tekanan air pendingin 2 bar

Bantalan Radial

Nama Pabrik N E Y R P I C Jumlah 6 Diameter bantalan 600,4 h7 Toleransi minimum 0,4 mm Toleransi maksimum 0,54 mm Bahan Blok bantalan B a b i t Sistem pelumasan Melumas sendiri (gaya sentrifugal) Tanki Pelumas Berputar ( terpasang pada poros) Jenis Minyak Pelumas shell Turbo 68 Volume minyak Pelumas 150 liter Sistem pendingin air (bersih) sirkulasi tertutup Pemindahan panas Didalam blok bantalan

• Data batasan operasional Toleransi maksimum 0,54 mm Temperatur minyak alarm 650 C Temperatur minyak trip 750 C

D R A F T U B E

Draftube terdiri dari 2 bagian ; Bagian vertical : langsung dibawah rumah keong, berupa pipa

konisdari plat baja (conical steel draftube), dengan ujung bawah (diameter yang lebih besar 2700 mm) terk\letak pada elevasi 17.25

Bagian horizontal : sebagai lanjutan dari bagian vertical, berupa dua saluran beton parallel dengan penampang berbentuk segi

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empat, mengarah ke titik pusat menara dengan dasarnya pada elevasi 13.00

Pada draftube konis terpasang lubang orang ( man hole) berfungsi sebagai lubang tempat masuk kedalam draftube untuk mencapai runner dari sebelah bawah

Pipa didalam draftube berfungsi untuk memasukkan udara luar (melalui katup searah) kedalam draftube (injeksi udara) guna mengurangi gejala kavitasi yang mengakibatkan kerusakan berupa lubangan kavitasi pada permukaan logam.

Pada belokan dari bagian vertical menjadi horizontal dipasang pelat pemisah aliran berupa bidang lengkung yang posisinya mula-mula vertical, menjadi 900 dan berakhir mendatar (languette) untuk mengurangi turulensi pada aliran air dalam draftube. Pelat pemisah terdiri dari pelat baja (sebagai dinding luar dengan tebal 8 dan 16 mm) dengan ruang diantaranya diisi beton (tebal total makksimum 450 mm)

Spiral casing (rumah keong)

Nama pabrik N E Y R P I C Jumlah 6 Ukuran :

Diameter maksimum (laluan air masuk) : 2550 mm Radius rumah maksimum (dari titik runner) : 4550 mm Radius rumah maksimum : 3200 mm Tebal pelat baja (berangsur berkurang dari arah hulu ke hilir)

20, 16, 14, dan 12 mm Bahan Baja siemens Martin A37 T25

Data batasan operasional :

Tekanan normal 8 kg / cm2 Tekanan pengujian 14,5 kg / cm2 Kecepatan air maksimum (tekanan cat)

S U D U T E T A P (STAY VANE) Nama pabrik N E Y R P I C Jumlah sudu (per Unit) 10 Tebal 70 mm Radius lengjungan 750 mm Bahan Baja Siemens Martin A42

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SUDU PENGATUR (WICKET GATE) Nama Pabrik N E Y R P I C Jumlah sudu (per Unit) 20 Ukuran sudu :

Tebal (maksimum) 85 mm Tinggi 680 mm Lebar 500 mm Bahan Z 5CN12-04M Penampang laluan air antara dua

sudu (posisi terbuka penuh) - tinggi 680 mm - lebar 210 mm

Luas laluan air maksimum antara dua sudu 1428 cm2 Kecepatan air maksimum (ketahanan cat) 10 m / detik Kebocoran air maksimum 20 l / detik

S T O P L O G

Nama Pabrik GALILEO GALILEI Ukuran : Tinggi 3395 mm

Lebar 3220 mm Tebal 360 mm Tebal Pelat 12 mm

Rel Stoplog berbentuk Profil T (70 x 70 x 8 mm) Berat 3700 Kg Jumlah 4 Kapasitas alat pengangkat 5 ton Rel Penggantung Profil INP 260 Minyak pelumas roda gigi Compond BB (SAE 90) Pelindung Sling Cardium Compond

GOVERNOR Number of turbines : 6 Type of turbine : Francis Net head : 48 to 80 m Output : 32,4 MW

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Normal speed : 272,7 rpm Runway speed : 590 rpm Governing system pressure : Nominal pressure : 27 bars Minimal assumed pressure to move the servomotors : 21,6 bars Servomotors Number : 2 Stroke : 270 mm Bore diameter : 355 mm Rod diameter : 110 mm Total volume (2) : 48,3 liter Air accumulator Height cylindrical part Hs : 1480 mm

Diameter Ds : 1110 mm Volume of elliptical part Ve : 184,42 liter Section cylindrical part Ss : 96,7 dm2

Total volume : 1800 liter Main distributing valve Closing discharge : 12 liter / sec

Main valve Neyrpic : D 50 B DE

Max. pressure loss : (12 / 5,4)∧2 = 4,9 bar

Connection to servomotor is made with ∅ 80 mm piping. More generally, all precautions are taken in order to keep the oil flow speed under 2,4 m / s. The level is measured in dm, from the lower part of the cylindrical sleeve. A servomotor volume corresponds to a oil thickness of 0,5 dm.

Pressure Level Level switch Function 29 3.7 ND Too high

27.8 3.2 DA Injection 27 2.8 Normal

25.2 2 DB Established pressure

23.4 1.1 DC Start auxiliary pump 22.7 0.7 ND Unit shutdown 21.5 0 NC Close shutoff valve

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Diaphragm calculation Opening discharge Q = 4,831 l/s under 27 bars. Boring D = 13 mm Closing discharge Q = 12 l/s under 27 bars. Boring = 21 mm Pressure operating cycle In steady state operation of the unit, the pressure decreases slowly from 27 to 26 bars, due to normal leakage in the hydraulic valves and particularly the actuator. When 26 bars are reached, the operating pump discharge is directed towards the accumulator in order to recover the 27 bars pressure.During this cycle, the oil level fluctuates between 2,8 dm and 2,3 dm, wich corresponds to an oil volume of 49 liter. The deflation time depens on the valves leakages : Main valve : 5 l / mn

Actuator : 2,5 l / mn Miscelleanous : 2,5 l / mn Total : 10 l /mn

The estimated deflacting time is thus : 5 minuts Thermal dissipation In steady state operation of the unit, governing pressure is controlled through the two step cycle :

Step Duration (s) Pressure Power kW Inflation 30 s 27 7 Deflation 180 s 2 1.5 Mean dissipation 2.3

An oil – water heat exchanger is required, wich characteristics are summarized below :

Fluid Oil Water Discharge l/s 1,9 1 I/O temperature 45 / 44,3 38 / 38,6 Head loss bar 0,24 0,17

For the sake of security, a water discharge of 1,5 l / s will be supplied

SPEED GOVERNORS Number of sets installed : 5 Manufacturer’s name : Neyrpic Year of manufacture : 1992 Designation : DIGIPID 02

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Type : Electronic Freq. Shifted power controller static droop 5 % Freq. Shifted power controller transient droop 4 % Time constant : 2 sec Speed controller static droop : 5 % Main servo dead band Down : 0 Per unit Main servo max. Opening time : Tyo 10 sec Main servo max. Closing time : Tye 4,1 sec Max. main servo position Yt max. : 270 mm Per unit Speed power controller amplification gain Vr 10 Per unit Speed power controller time constant Tn 2 sec GENERAL DESCRIPTION The DIGIPID electronic equipment comprises :

A card container in two sectors: A “digital” sector accommodating all boards directly connected to the

microprocessor bus : this sector is located on the left-hand side, when looking at the governor front face. It contains : C P U Arithmetic calcul processor Tachometer I / O, D / A, and A / D convers board Logic input / output interface Optional – card reserved spaces RS422 serial communic to outside D / A output conversion board

An “analog” sector on the right hand side containing : One or two positioners One or two power amplifiers Logic I . S board Input galvanic isolations 4 – 20 mA outputs, if any

ELECTRONIC BOARDS SIMPLE EUROBOARD format : The boards of the “digital” sector are designed wiyh a 96 pint connector to DIN 41612 and those of the “analog” sector with a 32 – point connector to DIN 41512 Bus G64 / G96 – PC 394 SBS4 board : It includes : Microprocessor

(2 PROM – 1 RAM)

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(3 PROM 1 RS 232 INTERFACE

1 Wathdog 1 DATA buffer + 1 adress and control buffer

CALC board MEMORY BOARD TAC –HTR BOARD PC 389 MIADA BOARD – PC 342 MIDAC BOARD – PC 343 S 10 BOARD POSITIONER BOARD PC POS 380 POWER BOARD – PC PUIS ANALOG OUTPUT BOARD – PC 376 GALVANIC isolation of anlog inputs – PC 377 Logic I / O BOARD – PC 402 Monitoring Board – PC 406 MPPA CI 460 CARD

MAIN CHARATERISTICS AND PERFORMANCES Tachometer inputs.

One Unit and grid voltage transformer : Transformer isolated inputs

Rated amplitude : Ao = 3

100 V, 100 V, 127 V, 220 V 380 V rms

single-phase Minimum operating level : 1 % Ao Absorbed current : 10 mA rms max. Frequency deadband : 10 –4 Crystal frequency reference : precision = 10 –6

Parameter setting range

operating point : -10% to + 10% of nominal frequency

accelerometer : Tn = 0 to 100 s

transient reaction time constant : Td = 0 to 100 s programmable by

temporary speed droop : bt = 0 to 100 % means of keyboard

or proportional gain ∞ to 0,1

permanent speed droop : 0 to 10 %

Logic inputs : on photocouplers

control by dry loop fed in 24 V dc by governor

Logic outputs : by dry contacts

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External load (or level, or opening) set-point

input isolated by solid state galvanic separator

standard ratings :

0 – 10 mA

scale indicating unit full opening

4 – 20 mA

load taking slope grading adjustable from 5 sec to 1275 sec step by steps of 5 sec

Opening limiter

operating time adjustable from 10 sec to 500 sec step by steps of 10 sec.

CONTROL OF REGULATING DEVICE

Position adjustable from 0 to 100 % opening

Opening upon start up : 0 to 100%

Opening decrease upon start up : 0 to 100% adjustable

Opening decrease speed : 0 to 100% by means of

Or rated speed keyboard Polarizations and pre-positioning : 0 to 100%

GOVERNING CHARATERISTICS

Speed deadband : I x ≤ 2.10-4

Control signal deadband : ic < 2 x 11-3

MAIN CHARATERISTICS AND PERFORMANCES Tachometer inputs.

One Unit and network voltage transformer : Transformer isolated inputs Rated amplitude :

Ao single pass = 3

100 V, 100 V, 127 V, 220 V 380 V eff

Minimum operating level : 1 % Ao Absorbed current : 10 mA rms max. Frequency deadband : 10 –4 Crystal frequency reference : precision = 10 –6

Parameter setting range

Adjustable operating point : -10% to + 10%

Accelerometer : Tn = 0 to 100 s

Transient reaction time constant : Td = 0 to 100 s programmable

Temporary speed droop : bt = 0 to 100 % through dialogue

or proportional gain ∞ to 0,1

Permanent speed droop : 0 to 10 %

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Logic inputs : on relays

control by dry loop fed in 24 V dc by governor

control current : 36 mA

Logic outputs : through dry contacts

Breaking capacity : 0,5 A under 125 Vdc

External load (or level, or opening) set-point

Galvanic solid state separator insulated input

standard ratings :

0 – 10 mA

scale giving the unit full opening

4 – 20 mA

load taking ramp gradient, adjustable from set 5 sec 1275 sec step by steps of 5

sec

Opening limiter

operating time adjustable from 10 sec to 500 sec step by steps of 10 sec.

Speed set values : Adjustable from 10% to 300 % of the rated speed Output on reverse contact : 0,5 A under 100 Vdc

Teleindications :

4 – 20 mA output – maximum load impendance : 250 Ω (The indicators are not supplied with the governor)

Dielectric rigidity :

Between power supply primary and earth : 2000 f eff. 50 Hz-1 mm Between tachometer inputs on voltage

Transformers and earth : 2000 f eff. 50 Hz-1 mm Between logic input and earth : 2000 f eff. 50 Hz-1 mm Between analog inputs and earth

(external order, level) : 2000 f eff. 50 Hz-1 mm

MONITORING OF ADJUSTING GEARS

Position adjustable from 0 to 100 % opening

Opening upon start up : 0 to 100%

Opening decrease upon start up : 0 to 100% adjustable

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Opening decrease rate : 0 to 100% through dialogue

or rated speed Polarizations and pre-positioning : 0 to 100%

GENERAL USE CONDITIONS Storage In a ventilated room, if possible in its original packing in proper condition. Temperature : 0 to 500C Hygrometry : 50 to 65% of relative humidity Prior to any energization, remove dust from the equipment and dry it. Operation : In a well-ventilwted room, in a non-corrosive atmosphere Temperature : 0 to 500C Hygrometry : 50 to 65% of relative humidity over the full the full above –stated temperature range

PINTU PENGAMBILAN ( INTAKE GATE )

Data teknik :

Nama Pabrik ALESSANDRO CALZONI Jumlah 6 Jenis pintu Daun Ukuran daun pintu 5 x 2,4 m Berat daun pintu 8.000 kg Panjang perapat pintu 12,4 m Cat pelindung BITUSEALAC tebal 500 micron Sistem by pass daun pintu diangkat setinggi 5 cm

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Sistem penggerak Hidrolik Daya motor 27 kW Kapasitas pompa 3,5 liter / detik Jenis pompa Perpindahan positip dengan sudu datar radial Volume servomotor 550 liter Luas penampang torak 1085 cm2 Jenis minyak hidrolik SHELL TELLUS 37 Volume minyak 1200 liter

Data Operasi Normal :

Tekanan minyak hidrolik (manometer 13) : S t a r t 60 kg / cm2 Mencapai posisi by pass 45 kg / cm2 Pintu dalam keadaan seimbang 16 kg / cm2

(pipa pesat terisi air) Maksimum (penyetelan katup pengaman 4.3 75 kg / cm2 Kapasitas servo motor (gaya angkat mak

Simum dengan tekanan minyak 65 kg/cm2) 70 Ton

Waktu Pembukaan : Mulai start sampai posisi by pass 0,5 menit Pengisian pipa pesat sampai penuh (TMA 107) 10 menit Mulai posisi by pass sampai terbuka penuh 3 menit

Waktu Penutupan :

TMA 75 meter 16 – 28 detik TMA 114 meter 6 - 10 detik Debit bocoran maksimum 0,5 lt. / m / detik

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THRUST BEARING

T y p e Separate pads supported by spherical bearings Thrust runner plate in one part Exchanger inside the vat Directory of rotation : single Rated speed : 272,7 rpm Runaway speed : 590 rpm Rated load : 240 000 daN Number of pads : 8 Internal diameter : 0,72 m External diameter : 1,37 m Angle : 400 Total supporting surface 0,9484 m2 Total specific pressure 25 bar Thrust bearing oil film thickness 0,065 mm

OIL USED

Grade ISO VG 68

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Viscosity index : 100 approx Kinematic : 40 cSt at 500 C Total Volume : 1500 dm3

OPERATION OF THRUST BEARING

Inlet oil film temperature : 450 C Outlet oil film temperature : 650 C Mean oil film temperature : 550 C Minimum oil film thickness : 0,065 mm Thrust bearing losses : 75 kW

OIL LIFTING SYSTEM

Discharge : 28 dm3 / min Pressure : 150 bar Pressure with zero discharge : 250 bar (upon start up) Rotation speed : 1450 rpm Rated power of motor : 11 kW

Main injection pump

Pump - Manufacturer : V O L V O - Type : fixed displacement pump - Reference : F11 – 19 MBSNK - D ischarge : 28 dm3 /s at 1460 rpm - Nominale pressure : 150 bar

Motor

- Manufacturer : GEC ALSTHOM - Type : Induction motor - Reference : AFT 160 M04 - D ischarge : 11 kW - Rotation speed : 1460 rpm

Pressure relief valves

- Manufacturer : BOSCH - Reference : 0532 – 002 – 044 - Calibrated value : 250 bar

Chek valves

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- Manucfacture : MARRELHYDRO - Over pressure : 3,58 bar - Connection diameter : ¾” BSP

High pressure filter

- Manufacturer : HYDAC - Type : Double - Reference : DF DK - Clog warning indicator : Visual - Filtering Element : Permanent metal element - Absolute filtration rating : 40 micron

Low pressure filter

- Manufacturer : PUROLATOR - Type : Single - Reference : PI2015-68 - Clog warning indicator : Visual - Filtering Element : Permanent metal element - Absolute filtration rating : 100 micron

Pressures switch

- Manufacturer : REGULAUTO - Type : ZPN 600 SH - Range : 25 – 175 bar - Adjustement valve : Adjust at site

Pressures gauges

- Manufacturer : BOURDON - Type : MIX 100 - Range : 0 - 400 bar

- Connector diameter : ½ BSP m>le

Low pressure valves - Manufacturer : LEGRIS - Type : Spherical valve - Nominal pressure : 10 bar - Nominal diameter : 1” BSP

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MAIN GENERATOR

Manufacturer’s name : GEC ALSTHOM JEUMONT Year of manufacture : 1992 Standards : I E C Frequency : 50 Hz Number of phases : 3 Stator phases winding connection Star with nine ends of winding

(the neutral point is normally brought out and suitable for non grounded through a resistance to effectively grounded operation limit the generator ground fault current to 15 A during 10 sec)

Generator neutral : brought out Artificial neutral resistance : 8,8 Ω Ventilation : Closed circuit Cooling fluids : water / air Direction of rotation vieved from

above : clockwise Travelling crane capacity : 110 tons Clearance under hook above

floor at elevation 22,25 : 10,50 meter Rated characteristics of the generator

Rated voltage between phase

terminals : 6,3 kV ± 10%

3 phase stator rated current : 3208 A ± 10%

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Rated power factor, on inductive circuit : 0,93 lagging

Continuous maximum rated output : 35 MVA Continuous rated active output at

rated voltage and rated power factor : 32,55 MW

Continuous rated reactive output at Rated voltage and rated power factor (reactive power supply only) : + 12,86 Mvar

Synchronous speed : 272,7 rpm

Temperature riseses

a. Insulation classes

Insulation standard : I C E

Stator insulation :

Insulation electrothermal class : F

Operation electrothermal class : B

Rotor insulation :

Insulation electrthermal class

between coil turns : F

Insulation electrothermal class

between coils and ground : B

b. Temperature rises

Maximum average temperature

rise of the stator winding at

continuous rated output : 800 C

Maximum average temperature

rise of the rotor winding at

continuous rated output : 900 C

Maximumaverage temperature

Rise of the magnetic parts (iron)

In contact with winding : 800

C

c. Maximum temperatures Maximum temperature of the stator winding : Above air at 400 C : 1200 C Above water at 300 C : 1200 C Maximum temperature of the rotor winding : Above air at 400 C : 1300 C Above water at 300 C : 1300 C

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Maximum temperature at the hottest spot of the stator winding at continuous rated output : 1200 C Maximum temperature at the hottest spot of the rotor winding at continuous rated output : 1300 C

Electrical characteristics :

Short Circuit data - Short circuit ratio for the

rated output (Kc) : 1,14 - Instantaneous short circuit

Current (3 phase terminal short circuit ) : 21 kA

- Short circuit highest torque : 13,8 x 106

Reactances - Armature resistance per phase

Calculated at 750 C : Ra = 0,004268 Ω

- Field resistance calculated at 750 C : Rf = 0,27423 Ω - direct – axis synchronous : Xd = 0,99 pu - quadrature – axis synchronous

reactance : Xq = 0,65 pu - direct – axis transient reactance : X’d = 0,28 pu - direct – axis subtransient reactance : X”d = 0,16 pu - quadrature – axis subtransient

reactance : X”q = 0,20 pu - Negative phase sequence reactance : Xi = 0,18 pu - zero – phase sequence reactance : Xo = 0,07 pu - Short circuit sequence reactance : Kcc = 1.14 pu - Direct axis field time constance,

armature in short circuit : Td = 2 s - Direct axis field time constance,

armature in open circuit : Tdo = 7,28 s

Voltage and load variation

Guaranteed maximum deviation factor of the no – load voltage wave – form from sine wave : 1,5 %

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Relative variations of voltage in the Rated load at steady speed and excitation at normal power factor : 6,9 % at unity power factor : 0 % Unbalanced load Admissible unsymmetrical Permanent load : 12 %

Permissible generator output

as a function of cooling water temperature Cooling water temperature of 200 C 39,1 MVA

Cooling water temperature of 250 C 38,0 MVA Cooling water temperature of 270 C 37,6 MVA

Cooling water temperature of 300 C 35,9 MVA Cooling water temperature of 350 C 35,7 MVA

Cooling water temperature of 400 C 34,2 MVA

E f f i c i e n c i es According to standard IEC No. E 34.2 and UTE NF C 51 - 100 - at nominal power factor and at 100% load 98,40 % - at nominal power factor and at 75% load 98,26 %

- at nominal power factor and at 50% load 97,87 % - at unity power factor and at 100% load 98,53 %

- at unity power factor and at 75% load 98,39 % - at unity power factor and at 50% load 97,97 % - Guaranteed efficiency at rated values (rated output voltage and power factor) including exciter and voltage regulator losses 98,40 %

L o s s e s

According to standard IEC No. E 34.2 and UTE NF C 51 – 100 - exciting circuit losses : 96,6 kW - losses independent of current : 242,5 kW - direct load losses : 121,1 kW - stray – load losses : 70,6 kW - total losses : 530,8 kW - additional bearing losses

(combined thrust bearing and guide bearing losses) : 125 kW

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- Maximum guaranteed losses including windage but excluding mechanical losses in guide bearing and thrust bearing

- at nominal power factor and at 100% load 530,8 % - at nominal power factor and at 75% load 429,7 %

- at nominal power factor and at 50% load 354,5 % - at nominal power factor and at 0% load 243,3 % - at unity power factor and at 100% load 484,9 %

- at unity power factor and at 75% load 399,1 % - at unity power factor and at 50% load 337,2 %

- at unity power factor and at 0% load 243,3 %

Mechanical characteristics

Flywheel effect WD2 of rotating parts of the generator : 900 tm2

Maximum runway speed : 590 rpm Runway duration without permanent deformation : indefinitely mn Maximum temperature of cooling water for oil and air cooling systems : 300 C Maximum temperature of air leaving the generator air coolers : 400 C

Stator casing manufacture data

Stator casing overall outer diameter : 5840 mm Diameter of the generator including heat exchanger : 6540 mm Elevation of generator winding cover : 26,2 m Total height of the stator casing : 1645 mm

Stator magnetic core manufacture data Overall core outer diameter : 4650 mm Stator core bore diameter : 4090 mm Height of the laminated core including air vents : 1170 mm Number of vents : 27 Number of slots : 234 Size of slots (puching) : 104,5 x 18,3 mm Number of sectors per turn : 26 Number of joint : 0 Type of overlapping : 1/3 Specific loss of the stator lamination

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at one Tesia : 1,10 W/kg Weight of the action stator iron : 25.000 kg

Stator winding manufacture data

Type of compensation : ROEBELL BARS 3600 Type of insulation : DURITENAX Type of winding : IMBRICATED Number of conductors per slot : 2 Number of parallel paths per phase : 2 Number of slots per pole and per phase : 36 / 11 Number of slots per pole : 36 / 11 Winding step : 10 ( 1 to 10 ) Cross section of a conductor with Roebell type transposition : 473 mm2 Maximum initial value of the dielectric factor tan (measured at 0,2 rated voltage) 0,03 maximum increase of the dielectric factor per measuring voltage interval D tan d/0,2 Un : 0,005 Weight of cooper in stator : 5367 kg

Rotor manufacture data

Number of poles : 22 Dimension of rotor coil : Average turn length : 3340 mm Overall length : 1493 mm Overall width : 444 mm Height : 200 mm Number of turns per pole : 46 Size of turns : 70 x 3,9 mm Section : 271,8 mm2

Weight of cooper in rotor : 8536 kg Rotor Shaft : Air gap : 17 mm Overall rotor shaft length : 5770 mm

Generator cooling system :

Cooling air discharge : 20 m3 / sec Cooling water flow at 300 C for the generator air cooler, without bearings : 1717 l / mn (28,6 l/s) Temperature rise of cooling water : 50 C Cooling system rated for losses : 553 kW Cooling water flow at 300 C for the Bearing of the generator : 420 l/mn (7 l/s)

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Generator air cooler data :

Number of coolers per generator : 6 Location : Generator chamber Manufacture : BOLDROCHI BIASSONO – MILANO Type : air / water Refigerante tipo ; Cooler Height : 1415 mm Width : 1430 mm Thickness : 245 mm Year : 1993 Q water : 17,2 m3 /h Maximum rated pressure : 10 bar Water inlet temperature : 300 C Water outlet temperature : 350 C Average speed of water circulating In the tubes : 1,5 m/s Water flow for air coolers : 103 m3 /h Testing pressure of the water circuit : 15 bars

MAIN EXCITER Manufacturer’s : S A R E L E M Year : 1993 Type : Rotating rectifier Location : Above upper bracket Excitation current : 40 Amp. Excitation voltage : 37 Volt Armature current : 486 Amp. Armature voltage : 135 Volt

Connection : Υ Rated speed : 272,7 rpm Runway speed : 590 rpm Excitation rated output : 95 kW Field supperession system :by exciter field suppression Type voltage regulator : Jeumont Type P

POWER TRANSFORMER GENERAL CHARACTERISTICS Manufacturer’s name : M A R E L L I

Year of manufacture : 1963 Standard : ANSI Normal protection : Indoor Service : Continuous

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Altitude : Less than 1.000 m Type of transformer : Step – up Number of phase units : 3 – phase

Number of phase in network system : 150 kV ± 10 % Network system voltage frequency : 50 Hz Windings : Cooper Dielectric : Oil Cooling : O F W Nominal rating (Sn) : 35 MVA Rated voltage : 6.300 Volt Current : 3.207 Amp. Connection : ∆ (Delta) Number of bushing : 3

Rated voltage (Un ±) : 150 kV ± 7,5 % Current Un : 134,7 Amp.

Connection : Υ (Star) Number of phase bushings : 3 ( cable box ) Number of neutral bushing : 1 Vector group : Ynd5 Transformer impendance : 9,5 % Voltage adjustment Winding : Secondary Tap – changer switch operation : Off – load and off voltage Type : Wedge Number of positions : 3 Number of steps : 2

Tapping range : ± 7,5 % INSULATION LEVELS The insulation classes of the windings are those specified in the Standars ANSI C 57 – 12 – 00 given in the following table : Primary winding Secondary winding TEST Line Neutral Line Neutral Applied voltage test 1 mn – 50 cycles kV rms 26 NA 35 35 Induced overvoltage test During 6000 cycles kV rms 22 NA 325 Impulse voltage test 1.2/50 microsec : full wave kV peak 95 NA 750 chopped wave 865

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Test voltage of auxiliary low voltage equipment at 50 Hz during one minute : 2 kV. No load current No load current in % of the nominal current and : - At Un – 15 % : 0,4 % - At Un – 0 % : 0,8 % - At Un +15 % : 3 % Losses

Iron losses ( ± 5%) in kW and : - At Un - 15 % : 30 kW - At Un - 10 % : 34 kW - At Un - 5 % : 38 kW - At Un - 0 % : 44 kW - At Un + 5 % : 50 kW - At Un + 10 % : 56 kW - At Un + 15 % : 63 kW

Copper losses (± 5 %) in kW and : - At 750 C and full load SN

(guaranteed) : 153 kW

Total losses (± 5 %) in kW and : - At 750 C and full load SN : 197 kW