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7/29/2019 Alstom Grid Bushings Pno Light Uk Web
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GRID
PNOCondenser Bushings52-245 kV
bushings
Customer Benefts
Buhin with loner
lifetime and hiher reliability
Utilization under extreme
weather condition (lower
pour-point value)
No oxidation phenomena
typical with mineral oil
No performance reduction
with ae
Voltage and current ratings
Rated voltae rane for PNO buhin, normal
cantilever load, i 52 to 170 kV. Heavy canti-
lever load i 52 to 245 kV. PNO buhin, for
a rated voltae, are deined in order to have
the ame overall dimenion for all the normal
ervice current. There are three connection
alternative for the conductor:
Draw lead connection for 800 and 1250 A
Draw rod connection for 1250 A Bottom connection, uin a riid conductor,for1600 A
Uin uitable acceorie, any draw rod
1250 A buhin can be converted to draw lead
buhin, only for minimum under flane leeve
lenth, and vice vera. Minimum 1250 A draw
lead conductor ection are lited in fi. 11.
AN ALSTOM COMPANY
Dein, component and manufacturin
technoloy promote an averae lifetime in
exce of 30 year under normal operatin
condition.
The bushing is designated as follows:
PNO.145.650.800.X.Y
PNO IEC type Condener Buhin,Oil-Imprenated Paper (OIP)oil-to-air application
145 Inulation cla in kV650 BIL in kV800 Rated current in AX Cantilever load:
N = NormalH = Heavy
Y Oil ide hield:N = NormalL = Removable upward
(for 245 kV only)
OIL-TO-AIR - Oil-impregnated Paper
IEC STANDARDS 60137
PNO bushings are capacitance graded bushings with an oil-impregnated paper core.
They meet IEC 60137 Standards: insulated bushings for alternating voltages above 1000 V.They are designed for use in power transformers and can be installed up to a maximum
of45 inclination off the vertical.
7/29/2019 Alstom Grid Bushings Pno Light Uk Web
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CONDENsER BUsHINgs PNO
Main FeaturesPNO: IEC Standards Condenser Bushings
Rane 52 to 245 kV
Current up to 1600 A
Oil-Imprenated Paper
Air ide: porcelain inulator or compoite inulator
Oil ide: epoxy rein inulator
Partial dichare: max. 5 pC at 1.5 Un
synthetic imprenatin oil DDB
Dodecylbenzene fully micible with tranformer oil
Provided with power factor tap
(voltae tap upon requet)
Draw lead for 800-1250 A - draw rod for 1250 A
bottom connection for 1600 A application
Head made of pecial UHV filter primatic la
with oil level indication viible at any anle of iht
Flane made of cat aluminum alloy.
standard anle of intallation max of45 off vertical
Fig. 1: Bushings 245 kVHeavy Cantilever load
Fig. 2: Bushings 52 to 170 kVNormal Cantilever load
1
1
2
2
3
3
4
4
5
5
6
6
8 8
99
7
7
1. HV Terminal
2. UHV lter la
3. Porcelain
4. OIP Condener
5. Windin tube
6. Power factor tap or voltae tap
7. Flane
8. Epoxy rein inulator
9. Oil ide hield
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CONDENsER BUsHINgs PNO
Manufacturing
The main electrical component i the condener body, manufactured
uin a continuou heet of pure kraft paper, wound around a central
conductor tube or rod. Durin the windin proce, the paper i
dried by heated cylinder in order to reduce it water content to 1%
maximum. A erie of aluminum foil are coaxially inerted between
the layer of the paper, to achieve the bet poible ditribution of
the radial and lonitudinal electrical radient between the central
tube and the flane, which i rounded. The windin i made by
computer-controlled machine, with ubequent machinin to achieve
the final hape. After windin, each buhin i individually aembled
and placed into an oven and then proceed under vacuum for the
appropriate period of time. Each one i then imprenated with
ynthetic oil, which ha been deaed and proceed o that it ha
a maximum water content of3 ppm. Each buhin i placed under
preure to inure thorouh imprenation and to tet that it i properly
ealed. After imprenation, the buhin head i filled with a nitroen
cuhion. Thi proce i automatic and computer controlled.
Top terminal
The tandard buhin top terminal i made of aluminum without
any urface treatment. Upon requet, it can be upplied in tinned or
ilvered copper. Draw lead or draw rod type buhin (800 and
1250 A) have a removable top terminal. Thi terminal i connected to
the copper inner terminal lu or the draw rod by mean of multiblade
contact and i ecured to the buhin head by crew. In bottom
connected buhin (1600 A), the inner non-removable rod alo act a
top terminal.
Head and oil level indication
The metal component of the head are made of a cat aluminum
alloy. Buhin have an oil head reervoir, primatic in hape, made of
boroilicate la, and containin a UHV filter, which allow for an eay
check of the oil level even from a ditance and at any anle of iht.
Air side
The air ide inulator i made of brown porcelain. grey porcelain or
compoite inulator (rein fiberla envelope covered by ilicone hed)
i available upon requet. The typical creepae ditance i uitable for
very heavy polluted atmophere. The hed confiuration i an alternatin
type: hort-lon hed. Thi i the mot effective olution, proven by
alt pray tet. The hed profile complie with IEC 60815 - 1986
recommendation. A one-piece porcelain or multiple piece porcelain,
in order to meet standard or pecial requirement, are ued for buhin.
Multiple piece are lued uin epoxy rein, without ue the of aket,
and the final porcelain i conidered a a inle piece (it pae
iEC 60233 - 1974, claue 6 tet).
Flange
The flane i made of cat aluminum, and i equipped with the
followin acceorie:
Lifting holes Power factor tap, teted at 2 kV for 60 (fi. 3),
and/ or voltae tap, upon requet (fi. 4)
Buchholz relay connection: 1/2 a outlet plu Oil sampling plug (for 145 kV buhin).
1. Cloin and roundin cap
2. Meaurement electrode
3. Inulation tap
4. gaket
5. Tap ane
6. Buhin ane
7. Lat layer
1. Cloin and roundin cap
2. Meaurement electrode
3. Inulation tap
4. gaket
5. Fillin plu
6. Buhin ane
7. Connection to internal layer
8. Tap external houin
Fig. 3: Power Factor Tap Fig. 4: Voltage Tap
7 4 6 5
3 2 1 1423
7
6
4 5 8
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CONDENsER BUsHINgs PNO
Oil side
The oil ide envelope i made of a molded epoxy rein. Thi rein i
a two-part compound conitin of a rein bae and a hardener; the
filler material i quartz and. The epoxy rein envelope permit hape,
thickne and dimenional tolerance not poible with porcelain.
Under flane leeve lenth for CT accommodation, different from
tandard, i available upon requet. In thi cae, the rounded part i
obtained by mean of a metallic tube or directly by the lat metallic
layer inide the condener body.
Oil side shield
The bottom end of the buhin i hielded by a proper deflector, made
of aluminum alloy. It i deined to reduce the electric field tre
in oil and to creen the connection between the lead comin from
the tranformer windin and the buhin itelf. Buhin up to and
includin 170 kV have a deflector interated in the epoxy rein tail.
245 kV 1600 A buhin have an aluminum hield that can be moved
upward. The ame hield i available, upon requet, for 800 and
1250 A buhin.
Assembling
The mechanical couplin amon all the part of the buhin i made
by mean of prin placed into the head of the buhin. 245 kV
buhin are alway aembled uin (air ide) porcelain cemented to
flane (fi. 5) a well a the one for heavy cantilever (H) load. The
cement ued i quick ettin monocalcicaluminized type. All cemented
urface, potentially in contact with the external environment, are
ilicone ealed (fi. 5).
Insulating uid
We have over 20 year of field-proven experience with oil-imprenated
paper buhin uin ynthetic oil dodecylbenzene (DDB). DDB oil i a
mixture of monoalkylbenzol: a benzenic rin with lateral aturated chain
(fi. 6). Thi oil ha uperior dielectric and inulatin characteritic than
mineral oil:
superior and contant dielectric qualitie (non ain) Hih a aborption under electrical field tre and hih temperature Neliible toxicity
Excellent bioderadability Full micibility with tranformer mineral oil A very low pour point and hiher flah point No PCB content
Fig. 5: Cemented porcelain
1. Porcelain
2. Cement
3. Metal cemented rin
4. Flane
5. silicone ealin
Fig. 6: DDB dodecylbenzene synthetic oil
saturated lateral chain
Benzenic rin
---(CH2)
9-13---(CH
3)
1
5
2
3
4
5
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CONDENsER BUsHINgs PNO
Gaskets
Made of Viton, a fluorocarbon rubber elatomer (FPM), o-rin
type. They are compatible with all the fluid they are in contact with
(buhin imprenatin ynthetic oil and tranformer mineral oil). Air
ide aket are carefully protected, by mean of a ealin, aaint
influence of pollutin weather element. For pecial requirement, uch
a low ambient temperature (down to -55C), pecial o-rin are
ued.
Arcing horns
Adjutable arcin horn are available upon requet. The upper arcin
horn i fixed by mean of one crew ued to ecure the top terminal,
while the bottom one i fixed on a proper threaded flane hole (fi. 7).
Transformer oil
synthetic oil DDB ued in buhin i completely micible with
tranformer mineral oil. Thi oil mut have a water content le than
15 ppm for voltae up to 145 kV and le than 10 ppm for 170 kV and
above rated voltae. It dielectric trenth mut be hiher than 60 kV,
accordin to IEC60156.
Tests
All buhin have electrical characteritic and are teted in compliance
with the latet edition of IEC 60137 standard: inulated buhin for
alternatin voltae above 1000 V and Main National standard.
Type tests
Meaurement of dielectric diipation factor (tan d),capacitance and partial dichare quantity before and
after the erie of type tet
Wet power-frequency voltae withtand tet Temperature rie tet Verification of thermal hort-time current withtand Cantilever load withtand tet Tihtne tet Verification of dimenion
H
10
Fig. 7: Discharge distance for a bushingequipped with arcing horns
7/29/2019 Alstom Grid Bushings Pno Light Uk Web
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CONDENsER BUsHINgs PNO
PNORange 52 to 245 kV
Dimensions HeadSize
NominalSystem
Voltage
Ratedline-to-
earthvoltage
BIL(Drylightning
impulsewithstand
voltage
Ratedcontinuous
current
Dryandwet
powerfrequency
withstand
voltage(for60s)
Flexibledrawlead
connection
Rigiddrawrod
connection
Bottom
connection
Kmin.
(CTpocket)
Minimum
creepagedistance
(forNormal/eavy
cantileverload)
C:Arcingdistance
(forNormal/eavy
cantileverload)
Normal
cantileverload
Heavy
cantileverload
Weight
Maxoperating
altitude
H(discharge
distance)+/-10%
Type kV kV kV A kV mm mm mm N N kg m mm
52.250.
800
52 30 250
800
95
X
50 1722/1662 610/550
1000
1600
25
4000 3201250 1250 X* X1250
32
1600 1600 X 40
72.5.325.
800
72.5 42 325
800
140
X
0 2359/2299 760/700
1000
2000
29
3000 4501250 1250 X* X1250
38
1600 1600 X 48
100.450.
800
100 58 450
800
185
X
50 3100/3040 985/9251000
2000
432000 6001250 1250 X* X
125052
1600 1600 X 80
123.550.
800
123 71 550
800
230
X
0 3886/3806 1155/1075
1250
3150
84
3000 7501250 1250 X* X1600
95
1600 1600 X 106
145.650.
800
145 84 650
800
275
X
100 4539/4459 1405/1325
1250
3150
105
2000 9001250 1250 X* X1600
120
1600 1600 X 150
170.750.
800
170 98 750
800
325
X
0 5333/5253 1595/1515
1250
4000
120
2000 10001250 1250 X* X1600
130
1600 1600 X 162
245.1050.
800
245 142 1050
800
460
X
0 --/8224 --/2310
-
4000
230
1000 14501250 1250 X X - 265
1600 1600 X - 248
(*) poible only for K minimum - Note: for ratin not lited, conult u.
Dimensions Head
Size
D1 D2 D3 D4 D5 D6 D7 R7 D10 D11 D13 L2 L3 L4 L5 L6 L8 L9 t1 n. F
Type kV kV kV A kV mm mm mm N N kg m mm
52.250.
800
100 185 22530
17035
100 100 60 95
-860
69580
240705
25
-14
6 161250 32 -100
1600 40 - - 915 125 - - -
72.5.325.
800
100 185 22530
17035
100 125 60 95
-1010
84580
240855
25
-
14 6 161250 32 -100
1600 40 - - 1065 125 - -
100.450.
800
115 250 29030
17035
115 175 70 130
-1245
108080
3251090
50
-
16 8 161250 32 -100
1600 40 - - 1300 125 - -
123.550.
800
115 250 29030
23035
115 200 70 130
-1410
124080
3251255
50
-
16 8 161250 32 -100
1600 40 - - 1465 125 -
145.650.
800
145 290 33530
23035
145 225 70 130
-1660
149080
4751505
50
-
19 12 161250 32 100
1600 40 - - 1715 125 - -
170.750.
800
145 290 33530
23035
145 225 70 130
-1850
168080
4751695
50
-
19 12 161250 32 100
1600 40- -
1905 125- -
245.1050.
800
175 400 45030
27050
195 325110 200
-2745
252580
6202550 80
-
22 12 231250 40 130
1600 40 - 175 250 - 2850 125 - 180 -
1. HV terminal M12
2. Copperlug
3. Pin6. Multi blades
4. Belleville washers
5. Winding tube 5. Winding tube
4. Belleville washers
3. Pin
1. HV terminal M12
6. Multi blades
2. Draw rod
1. Top closing cap
2. Belleville washers
3. Solid rod
Fig. 8: 52-170 kV bushing head:draw lead connection
Fig. 9: 52-170 kV bushing head:drawarod connection
Fig. 10: 52-170 kV bushing head:bottom connection
7/29/2019 Alstom Grid Bushings Pno Light Uk Web
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CONDENsER BUsHINgs PNO
Fig. 13: 245 kV bushing head: draw rod connection Fig. 14: 245 kV bushing head: bottom connection
I
I
rated voltage < 170 kV
Section(mm2)
800
700
600
500
400
300
200
100
0200 300 400 500 600 700 800 900 1000 1100 1200 1300
I (A)
k=500k=0
I
rated voltage 170 kV
I (A)
900
800
700
600
500
400
300
200
100
0200 300 400 500 600 700 800 900 1000 1100 1200 1300
Section(mm2)
k=500k=0
I
rated voltage 245 kV
I (A)
Section(mm2)
1000
800
700
600
500
400
300
200
100
0200 300 400 500 600 700 800 900 1000 1100 1200 1300
900 k=500k=0
I
I
5t1
n holes F
F+8
+
1. HV terminal
2. Copperlug
3. Pin
4. Bellev ille washers
5. Winding tube
M12
6. Multi blades
3. Pin
1. HV terminalM12
6. Multi blades
2. Draw rod
4. Belleville washers
5. Winding tube
1 - Top closing plate
2 - Springs
3 - Solid rod
D11
D10
L8
L5
K
L2
L3
C
t1
L6
R7
45
D5
D4L4
D6
D1
D7
D3
D2
3
2
1
D11
D10
R7
D6
D1
D7
L8
L5
K
t1
L2
L3
C L6
L4D4
D5
45
D3
D2
1
2
3
1. Air drainin plu
2. Liftin hole
3. Power factor tap
Fig. 15: PNO Bushings 52 through 170 kV Fig. 16: PNO Bushings 245 kV Fig. 17: Flange fxing holes
Fig. 12: 245 kV bushing head: draw lead connection
Fig. 11: Draw lead conductor sections
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CONDENsER BUsHINgs PNO
Grid-P
roducts-L3-PNO_
light-71961-2011_
02_
EN-Alstom,t
heAlstomlogoandanyalternativeversionthereofaretrademarksandservicemarksofAlstom.Theothernamesmentioned,registeredornot,arethepropertyoftheirrespec
tivecompanies.The
techni
calandotherdatacontainedinthisdocumentareprov
idedforinformationonly.
NeitherAlstom,
itsofcersnoremployeesacceptresponsibility
fororshouldbetakenasmakinganyrepresentationorwarranty(whetherexpressorimplied)astotheaccuracy
l t f h d t t h h i t f j t d f i t i
h t h i d i t d N l i b i l i t i t d f
l i l d
t h i f t i t i d i t h i b h A l t t h i h t t
i h t h
Followin the acquiition of PAssONI & VILLA, Altom grid now offer a lare portfolio of condener buhin for AC or
DC operation. If you require any further information, pleae addre your querie to
[email protected] ALSTOM COMPANY
GRID
Alstom Grid Worldwide Contact Centre
www.rid.altom.com/contactcentre
Tel.: +44 (0) 1785 250 070www.grid.alstom.com
To contact the manufacturer
Viale suzzani, 229 20162 MILANO (Italy)
Tel.: +39 02 661 221
Fax: +39 02 647 09 06Email: [email protected]
Routine tests
Dielectric diipation factor (tan d), capacitance and partialdichare quantity meaurement
Dry lihtnin impule voltae withtand tet (BIL) Dry power-frequency voltae withtand tet Meaurement of partial dichare quantity Tet of tap inulation Tihtne tet
Tihtne tet at the flane
Viual inpection and dimenional check
Packing - transportation
After tet and before packin, the buhin i cleaned of any oil or dut.
Thank to a pecial device to prevent the diffuion of the nitroen cuhion
out of the head and into the lower end of the buhin, each buhin
can be packed and hipped ecured in horizontal poition. Thi inure
minimal crate dimenion and reduced tranportation cot.
Proper protection i ued for oil ide hield. Buhin up to and inducin
170 kV are normally hipped in crate containin three piece.
Nameplate
Each buhin i provided with a nameplate, containin complete
electrical data and it erial number, in accordance with the requirement
of IEC standard. The tainle teel nameplate i ecured to the flane
with rivet and include the followin information (fi. 22):
D13
L9
30
30
K
L5
L8
30
L9
38
D13
D13
40
120
K
L5
L8
120
40
D13
30
PASSANTE-BUSHING-TRAVERSEE-DURCHFUHRUNG
50-60HzA
MILAN
ITALY
Kg
kV
1
23
4 5
7
6
8
N
SERIAL NR.
STANDARD REF.
CAP. C1 pF
DISSIPATION FACTOR AT 10 kV - 20 C %
MILAN - I TALY
CAP. C2 pF
Fig. 18: 52-170 kV bushing tail:draw rod connection
Fig. 20: 245 kV bushing tail:draw rod connection
Fig. 19: 52-170 kV bushing tail:bottom connection
Fig. 21: 245 kV bushing tail:bottom connection
Fig. 22: Identifcation Nameplate Fig. 23: Test Nameplate (from 123 kV above)
1. Buhin type
2. Inulatin voltae
3. Rated current
4. Max. moutin anle off
of the vertical
5. Weiht6. Blank (available)
7. serial number
8. Month - year of final tet