power transformer gtp_commented

Ethiopia/ EEPCOTransmission Substations Rehabilitation and Upgrading Project Contract: TSRUP-D

Bid Form: Schedule of Guaranteed Technical Particulars, 2. Mobile Substation

2.1) Power Transformer, Mobile Sustation (66/33/15 kv,8 \"VA) ~.o \\<»10

I DESCRIPTION I Required I Provided -] - Manufacturer ABB

- Type Oil immersed

- Standards applied IEC 60076 IEC 60076

- Method of cooling ONAN ONAN -

- Number of Phases 3 3

- Frequency, Hz 50 50

- Rated Temperature, °C -5 up to 40 -5 up to 40-_. - Operating altitude, meters above sea level (m.a.s.l) 2500 S2500

- Rated voltage:

a) 132kV HVwinding, kV 66 , 66

b) 33 kV LV1 winding, KV 33 33

b) 15 kV LV2 winding, KV 15 15

- Rated continuous power on all taps at ONAN: ...-...... a) 132 kVwinding, MVA 20 31.5 ~

b) 33 kV winding, MVA 10 31 .5 to ..

c) 15 kV winding, MVA 10 31 .5 10 - Voltage regulation by on-load tap changer on 132 kV winding, --

with range in % for 132 kV operation .± 10 taps @1.25% + 10 taps @1.25%

- Number of tap positions of on load tap-changer 21 ~~ - Vector group (Connection symbol) YNd11d11 Y~d11J. \\ /"

- Load losses of the power transformer:~

a) No-load losses at rated voltage, frequency and at nominal tap (~position, kW

b) Load losses between 132 kV and 15 kV winding, I @ ONAN base and at the following tap position: '"I.C\

-------- Maximum tap position, kW ")'\.9N\.Y' 179 (*)

- Nominal tap position, kW 180

- Minimum tap position, kW 183 (*)

c) Maximum load losses at mean tap position 180 (*)

and @ ONAN base, kW

d) Total losses at mean tap position and @ ONAN base, kW 105 (*)

f) Total losses at tap giving maximum losses 208 (*) I@ ONAN base kW

U \J\?;~)' S ~\~o\\() ~V Section IV BlOc mg Forms

Functional Guarantees Bidder's stamp and signature Page FG3 - 114



2.1) Power Transformer, Mobile Sustation (66/33/15 kV,.@

I DESCRIPTION

- Efficiency referred to 75°C rated voltage tapping and at :

a) 100% rated output and unity power factor, % . -

b) 75% rated output and unity power factor, %

c) 50% rated output and unity power factor, %

d) 25% rated output and unity power factor, %

e) 100% rated output and 0.8 power factor, %

f) 75% rated output and 0.8 power factor, %

g) 50% rated output and 0.8 power factor, %

h) 25% rated output and 0.8 power factor, %

- No load current at nominal tap position as percent of HV side rated current and @ ONAN base :

a) at 90 % voltage, %

b) at 100 % voltage, %

c) at 110 % voltage, %

- Content of harmonics as percent of no-load current at 100%

- -rated voltage :

a) 3rd harmonics, %

b) 5th harmonics, %

c) ih harmonics, %

- Impedance voltage at 75°C, between HV and LV windings for ONAN rating and the following tap position :

a) Impedance voltage at maximum tap position

1) Between HV and LV1 windings


b) Impedance voltage at nominal tap position



c) Impedance voltage at minimum tap position



I Required I Provided

>99.5 99.61% (*)

>99.5 99.68% (*)

>99.5 99.73% (*)

>99.5 99.72% (*)

>99.5 99.51% (*)

>99.5 99.6% (*)

>99.5 99.67% (*)

>99.5 99.65% (*)

~ ( 0.08 (*)

0.15 (*)

'<0 \ 0.55 (*)

,~ ~ VI

23 average(*)

38 average(*)

35 average(*)

standard mimimum ~Q. / '{\

sJ"' ~/ 12.2 (*)

~I I 12.2 (*)

standard mimimum \ 11.5 \

11 .5 (*)

standard mimimum

\ 11 (*)

11 (*) /

I

V

Sec oTf1V1th-l.,../-i~~




2.1) Power Transformer, Mobile Sustation (66/33/15 k '

I DESCRIPTION

- Resistance voltage at 75°C, between HV and LV windings for ONAN rating and the following ta~ ~osition : -

a) Resistance voltage at maximum tap position



b) Resistance voltage at nominal ta~ position

1) Between HV and L V1 windings


c) Resistance voltage at minimum tap position



- Zero sequence impedance voltage at 75°C, between HV and LV windings for ONAN rating and the following tap position:

a) Zero sequence impedance voltage at maximum tap position

1) Between HVand LV1 windings


b) Zero sequence impedance voltage at nominal tap position

1) Between HVand LV1 windings


c) Zero sequence impedance voltage at minimum tap position



- Voltage ratio at no-load and at nominal tap position

- Permissible overload occurring once a day at regular hours:

a) Continuous loading after 100 % output

1) 30 minutes duration

- Percent overload, %

- Winding temperature, °C

2) 2 hours duration

- Percent overload, %


I Required

standard mimi mum

standard mimimum

standard mimimum

standard mimi mum

standard mimimum

standard mimimum

66/33/15 kV

I Provided

~o 'rJ-..s-y!... /r" \

i 0.43(*) \

0.43(*) \ \

0.42(*)

0.42(*)

0.42(*)

0.42(*)

10.4 (*)

10.4 (*)

9.8 (*) -- 1--

9.8 (*)

-9.4 (*)

\ . 9.4 (*)~

66/33/15 kV

5(*)

Acc to Tab.4 IEC60076-7

3(*)

Acc to Tab.4 IEC60076-7

I

\

-

ng Forms



Bid Form: Schedule of Guaranteed Technical~. Mobile Substation

2.1) Power Transformer, Mobile Sustation (66133115 k 1.5 MVA)

DESCRIPTION Required Provided

b) Continuous loading after 75 % output


- Percent overload, % 46(*)

- Winding temperature, °C Acc to TabA IEC60076-7

2) 2 hours duration



c) Continuous loading after 50 % output


- Percent overload, % 71 (*)


2) 2 hours duration



- Permissible exceptional overload for duration of 30 minutes : ..

a) Continuous loading after 100 % output



b) Continuous loading after 75 % output


- Winding temperature, °C Ace to TabA IEC60076-7

c) Continuous loading after 50 % output

- Percent overload, % .. _.,


80(*)

Ace to TabA IEC60076-7 -

- Maximum output without forced cooling at 40°C ambient tem2.erature on 33 kV winding, (MVA)

10 10

- Maximum output without forced cooling at 40°C ambient temperature on 15 kV winding, (MVA)

10 10 .

------... ~SMVAXFR-3

Section IV BiCfdin orms

Functional Guarantees Bidder's stamp and signature Page FG3 -117

--


Bid Form: Schedule of Guaranteed Technical pa~0 Mobile Substation

2.1) Power Transfonner, Mobile Sustation (66/33/15 k~MVA)

DESCRIPTION Required Provided ']II I - Temperature rise (referred to 40°C ambient temperature) at continuous rated output :

a) Winding, °C 65

b) Oil, °C 60

c) Core, °C 75

- Class and material of winding insulation A, copper

- Class and material of insulation of iron core laminations A, carlite

SheliDIALA B-Type and quality of oil Nynas Libra

or Equivalent

- Magnetic flux density at rated voltage and 50 Hz in :

a) Legs, W/.m2 :5 1.75 ( ..)

b) Yokes, W/.m2

:::1.75

:5 1.75 ( ..)

- Current density at rated output and at mid - position of tap

a) 132 kV winding , Almm2

:::1.75

:54

b) 33 kV winding, Almm2 :54

c) 15 kV winding , Almm2 :54

- May the transformer and all accessories and components be Yes Yes

loaded in accordance with IEC publication 354, (Yes/No)

- Specific core losses at 50 Hz and :

a) 10000 gauss, W/kg 0.3(")

b) 15000 gauss, W/kg 0.73(")

- Transformer tank

a) Type Bolted cover Bolted cover

b) Thickness of side wall, mm 10(") -

20 ( ..)

d) Thickness of cover, mm

c) Thickness of bottom, mm

15 ( ..)

e) Filling medium for shipment Nitrogen Dry air

f) Vacuum which tank will safely withstand, mm/kg 30(")




2.1) Power Transfonner, Mobile Sustation (66/33/15 k~VA}) DESCRIPTION Required Provided

- Oil conservator capacity, litters 2700(*)

- Test voltage

a) Induced voltage test

1) 66 kV end of winding short-duration induced test, kV

2) 33 kV winding short-duration induced test, kV -

3) 15 kV winding short-duration induced test, kV

b) Separate source voltages test

150

70

50

--=\~~150)

70

<Jcf.. ( 50 ) I -----

1) 33 kV winding at 60 sec., kV

2) 15 kV winding at 60 sec., kV

3) Neutral end of winding at 60 sec., kV

70

50

70

?Jcb (SO)

c) Impulse test voltage full wave 1.2/50 micro sec.

1) 66 kVend of winding, kV 380 l'

J~ ~8~ 2) 33 kV winding, kV 170 170

3) 15 kV winding, kV 125 ~~ G2~ 4) Neutral end of winding, kV 95 95

- R.M.S. symmetrical short circuit current,

a) At 132 kV terminals, kA 31 .5 31.5

- Time to withstand short circuit, sec. 3 3

- Sound power level with all fans working, LWAIo dBA ..

- On-load tap-changer

< 70 < 70

a) Manufacturer MR Germany MR

b) Type VIII

c) Current rating, A 200

d) Voltage class, kV

e) System of design, kV . - .

f) Life time of contact

g) Total number of voltage steps 21 21

h) Total range of voltage variation, % ±10 x 1.25% ±10 x 1.25%

I) Voltage variation per step, V .-

j) Supply voltage of drive motor (AC. or D.C., V) 380V,AC 3'80-V, AC

FR-3 "'--::--.---:~~;:--~

Section IV Bidding Forms


125


Bid Form: Schedule of Guaranteed Technical ~Iars' . Mobile Substation

2.1) Power Transformer, Mobile Sustation (66133115 k 31.5 ~VA) DESCRI PTION Required ProvidedI I I I

k) Permissible number of duty cycles per hour (I,-~N~r~ -I) Control circuit voltage, V, DC (Dire Dawa I) 110

I) Control circuit voltage, V, DC (All other substation) 125

- Bushings

a) 66 kV bushing ~pplicat5l~

1) Manufacturer ~-r"'~~~\ 2) Type ~~,WCK~:/

cJ+...() . (,:.()Y\ h.P~c,\ £tr\:;oJ:Q:~l'r-:--

3) Rated current, A 630 ( 4) Rated voltage, kV 66

5) Power frequency test voltage, kV ~~Q "'<~;-185

6) Impulse test voltage, kV 450 \ ~~.~ 7) Creepage distance, mm 2250 ~ . j -

b) 33 kV bushing - ~ --

1) Manufacturer A BB

2) Type (Cable elbow) Cable Elbow Cable elbow

3) Rated current, A 1250630 _.---

4) Rated voltage, kV 33 33 -_.r-----..-

5) Power frequency test voltage, kV 95 70

6) Impulse test voltage, kV 250 1~ _.

7) creepage distance, mm 1100 \\(le ( 635 '/-b) 15 kV bushing

1) Manufacturer ABB

2) Type (Cable elbow) Cable Elbow Cable elbow

3) Rated current, A 630 1250

4) Rated voltage, kV 15 15

5) Power frequency test voltage, kV 50 50

6) Impulse test voltage, kV 125 125 ...- -- -..- .

7) creepage distance, mm 305 445

I XFR-3



Bid Form: Schedule of Guaranteed Technical pa~IaF&, 2. Mobile Substation

2.1) Power Transformer, Mobile Sustation (66/33/15 kV,~5 MAl)

I DESCRIPTION I Required I Provided I c) neutral bushing

1) Manufacturer ABB

2) Type Condenser

3) Rated current, A 800

4) Rated voltage, kV 3.6 ( 5:D

5) Power frequency test voltage, kV \1<l ~ 6) Impulse test voltage, kV 95 ,0 @ 7) creepage distance, mm \\()() (1690)

- Current Transformer (built-in HV bushings)

a) Manufacturer See attached vendor

list

b) Type Oil immersed

c) Ratio 150-300/1A 200/1A

d) Accuracy 10P20 10P20

e) Burden 15VA 15VA

f) Number of cores 3 3

- Current Transformer (built-in neutral bushings)

a) Manufacturer See attached vendor

list

b) Type Oil immersed ---

c) Ratio 100/1A 100/1A

d) Accuracy 10P20 10P20

e) Burden 15VA 15VA

f) Number of cores 2 2

- Weights: r-.. .'ol'O /- ~ a) Core and windings, kg \'"'", () ( 40000 (*) \

b) Oil, kg ~w 22000 (*)

c) Tank without heat exchanger, kg 'b( J,..t:jL 10500 (*)

d) Total power transformer with oil and including all accessories, ,~~, \ 72000 (*)ready for commissioning, kg .vX

e) Transport weight of heaviest part, kg \ 72000 (*) J ~



Bid Form: Schedule of Guaranteed Technical P~~0obile Substation

2.1) Power Transformer, Mobile Sustation (66/33/15 kV, 1.5 MVA)

I DESCRIPTION I Required I Provided ] - Accessories:

a) Type of temperature indicating device Terman

b) Type of hottest spot temperature indicator Terman

c) Type of mercury bulb type winding temperature indicator AKM

d) Type of oil temperature indicator Terman

e) Type of pressure releif devices Comem

f) Type of Bucholz relay Comem

- Dimensions ,..... -~

a) Overall length, mm ( 14000(*) \

b) Overall width, mm ,,0(1; 3600(*)

c) Overall height, mm ~ 3650(*)""",,. d) Height without bushings, mm "ArtY'"

J 3650(*)

e) Untanking height, mm I

()r-f-~t... 10000(*)

f) Transportation dimension of heaviest part ~ ' ~ ,f>;- 0. a.a. .f-.__.

~'1) Length, mm 14000(*) -

2) Width, mm 3600(*)

3) Height, mm 3650(*)

g) Transportation dimension of largest part

1) Length, mm 14000(*)

2) Width, mm 3600(*)

3) Height, mm \ 3650(*) J---h) Outline drawing No. After final design

- Wiring and Terminal Cabinets

a) Low Voltage supply, V, AC. 220 220

b) Control voltage, V, D.C 125 125

- Lightning Arresters Installed on Transformer Tank (Refers to Specific Schedule for Characteristics) /'" ~ '.

b) 18 KV and 36 kV Lightning Arresters Required \ Not included )

~'-.... ../


power transformer gtp_commented

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