Curre n t Tra n sf o rme rm e rs Ty p e IOSK
Curre n t Tra n sf o rme rs
Introduction Tren ch is a reco reco g n ized w o rld lead ea d er in th e d esi esign and an d m anu an u factu re o f high voltage ag e eq u ip m en t fo r app ap p licat catio n o n elect ectric u tility an d h ig h en erg erg y in d u strial syst system s.A s par pa rt o f Trench' en ch's s p ro d u ct scop e, th e com p any an y p ro d u ces a d iversi versified ran g e o f In stru m en t Tran sfo rm ers w h ich are in stalled o n 6 9 -8 0 0 kV electr ctrical calsystem s.In stru m en t Tran sfo rm ers ers in clu d e: V o ltag e (Po ten tial) Tran sfo rm ers (b o th in d u ctive an a n d cap cap acitive type type), C u rren t Transf ansform orm ers and C om bined In stru m en t Tr Tran sfo rm ers ers (vol vo ltag e an d cur cu rren t tran sfo rm er in o n e u n it). C u rrent en t Trans an sfo rm ers ers m u st con vert vert h ig h tran sm issi ssio n lin e cu rren ts (u p to 50 0 0 A ) to standa an dar rd ized lo w and an d eaea sily m easurab ea surabl le valu es, w h ich w illb e u sed fo r m eter eteri in g , p ro tecti ectio n an d con co n tro lo f th e h ig h vol vo ltag e syst system . A s su ch, th e need n eed fo r accur accu rate ate an d reliab le cu rren t tran sfo rm atio n is essen sen tial. Th is br bro chu ch u re w illd etailth e feat ea tu res an d cha ch aracteri cteristics of Tren ch Type Type IO SK C u rren t Tran sfo rm ers. ers.Please ea se refer efer to Tren ch b ro chu re E21 E 210 0 fo r adad d itio n al g en eralin fo rm atio n con co n cern in g h ig h vol vo ltag e In stru m en t Tran sfo rm ers ers.
Fig. 1 Type IOSK Curr ent Tran sformer
2
Features
•M eet allIEC and an d A N SIm eter eteri in g an d p ro tectio n classes, in clu d in g spe special cor co re classes TPS, TPX , TPY and an d TPZ TP Z (o th er st stan d ard ard s on req u est) •R ated p rim ary cur cu rren ts up to 50 00 A •Prim ary rec reco o n n ect ectio n avai availab le •R ated ated secon d ary ary curren t 1 A , 2 A or 5 A •R ated sho sho rt circui cu it w ith stan d up to to 20 0 kA peak •Trench Trench M anag em ent Syst System h as been be en cert certified to ISO 9 0 0 1 , ISO 14001 and O H SAS 18001 standards
•h ig h ly refin ed an d p ro cessed o il/p ap er in sul sulatio n syste system
•essen tially un u n affected b y stray ext external ern al m ag n etic fi field s
•H ead type d esi esign of low w eigh t and m inim um oilvolum e
•stab le accu a ccur racy acy over o ver a lo n g p erio d o f tim e
•u se o f h ig h q u ality m in eral o il, PC B free, ee , b io lo g ical d eco m p o sitio n
•exclu sive u se o f cor co rro sio n resistan t m aterials
•excel excellen t seism ic per pe rfo rm an ce as a con sequ eq u ence en ce of o p tim ized d esig n o f flan g es, p o rcel celain an d th eir in tercon co n n ectio n •sho sho rt, sym m etrical cally ar a rran g ed lo w react ea ctan ce b ar-type yp e p rim ary ary con co n d u cto r p erm erm its h ig h er shor sho rt circui cu it cur cu rren ts an d avoi vo id s larg e vol vo ltag e d ro p acro acro ss th e p rim ary ary w ind ing •excel xce llen t con con tro lo f in ternal rna lan d externa xtern alin sul sulatio n stresses th ro u g h th e u se o f a p ro p rietar etary y fin ely gr g rad ed b u shin g system •h erm etical cally seal sea led b y stain less steelm etallic be b ello w s •w eld ed h o u sin g sealed w ith o u t screw s
•expl xp lo sio n resistan t by: b y: - in sulati atin g syst system w ith h ig h rel reliab ility - fine grad graded ed bu shing - w eakp oint in the alum inium h ead castin g an d th e m etal etallic b ello w s servi servin g as p ressure essure release de d evice •1 :1 A cur cu rren t ratio p o ssib le •Su ccessf cce ssfu lfield expe xp erien ce sin ce th e m an u facture acture o f th e first cur cu rren t in stru m en t tran sfo rm er in 1 9 24 •m ain ten an ce fr free d u rin g a lo n g lifeti etim e o f m o re th th an 3 0 years years •com co m p o site in sul sulator ators ava avai ilab le o n request
•u n ifo rm ly di d istrib u ted secon seco n d ary w in d in g s gu aran arant tee accurat accurate e tran sfo rm ati atio n at bot bo th rated ated an d h ig h cur cu rren ts
3
Construction
Sta nda rd Eq Eq uipment uipment
Tren ch type IO SK C u rren t Tran sfo rm ers ers are are def d efi in ed as " h ead type" ype " C u rren t Tran sfo rm ers. ers.Th ese C T's are are desi d esig n ed an d co n stru cted w ith th e w ellp ro ven ven , h ig h ly reliab le, o il/p ap er in sulatio n syst system . Each Ea ch p o rcelain h o u sed, sed , h erm etically sealed C u rren t Tran sfo rm er is eq u ip p ed w ith stain less st steel ee lexexp an sio n b ello w s,calib rated to th e in tern ern al o ilvol vo lu m e an a n d extr extrem es in am a m b ient en t and an d o p erat erati in g tem tem p eratur atures.
•A lu m in u m flat p ad p rim ary ary term erm in aland an d g ro u n d ter term m in al
C u sto m er sp sp ecificati catio n s,such as ap p licat catio n (m eteri eterin g o r p ro tect ectio n ), n u m b er of o f cor co res, ratin g s,etc. h ave a d irect beari be arin g o n th e size o f th e "h " h ead " o r core core ho h o u sin g fo fo r each ea ch C u rren t Tran sfo rm er. For Fo r th is reason ea son, , th e typ type e IO SK is pro pro d u ced w ith d ifferent eren t si size h ead ea d s,Tren ch w illrecom ecom m end the o pti ptim um d esig n b ased o n each in d ivid u al cust cu sto m er speci spe cificatio n .
Optional Equipment
•Liftin g lu g s •B ello w s po p o sitio n in d icat cato r •O ilfillin g p o rt •O ild rain val valve •Seco Se con n d ary ary ter term m in al b o x w ith rem o vabl vab le g land an d p late ate
•Stud type yp e pr p rim ary term in al •Pri Prim ary ary or o r g ro u n d cabl cab le connector •A n ti-cor co ro n a rin g s Fig.2 IOSK IOSK 245 Cur Cur rent Tran Tran sformers
•C ap acitan ce tap tap fo r m eas ea su rem en t o f vol vo ltag e or o r tan d elta of of b u sh in g •G as D etect etecti io n System (con co n tact Tren ch fo r ad d itio n ald etails) •Term Term in al b o x heater he ater •C o m p o site In sulators
4
7 2. 5 - 170 kV
24 5 - 5 50 kV 11 3
11
2
2 10
1
3
10
14
1
14
12
15
13
12
15
13
4
4
6 8
5
7
9
7 8
5 6 9
1
Prim ary term term in al
2
M etallic expan expan sio n b ello w s
3
O ilfillin g screw screw
4
Po rcel celain in sul sulato r
5
Secon Seco n d ary ary term erm in al b o x
6
Seco Se con n d ary ary term erm in als
7
O ild rain val valve
8
G rou nd ing term erm inal na l
9
G lan d p late ate
W itho ut pri prim ary ary recon econ nection
Prim ary ary recon econ nection 1 :2
Prim ary reconnec econnect tion 1:2:4
Secondar Secondary y reconnec econnect tion
10 Liftin g lu g s 11 B ello w s in d icat cato r 12 H ig h vol vo ltag e in sulatio n 13 Secon dar da ry w ind ing
and an d cor co res 14 Pri Prim ary ary w in d in g 15 Trans an sfo rm er h ead
(alum inu m )
Fig.3 Electrical lectrical an d mechan mechan ical design design details
5
Oil/ Oil/p a p e r-i r-in su la t e d Cu rren t Tra n sf o rm e rs
Elect lect rical rical an d Mecha nica nica l Da ta (1)
Typ e
M ax a x.co n tin u o u s Test vo ltag e o p eratin g vo ltag e 5 0 /6 0 H z, z, 1 m in . p h ase to p h ase d ry/w et et kV
Sw itch in g im p u lse test vo ltag e 2 5 0 /2 5 0 0 µ s w et et kV
M in . sp arkin g d istan ce
Stan d ard creep ag e d istan ce
mm
mm
IO SK 7 2 .5 IO SK 1 2 3
7 2 .5 123
140 230
325 550
– –
700 1200
1815 3815
IO SK 1 4 5
145
275
650
–
1200
3815
IO SK 1 7 0
170
325
750
–
1400
4495
IO SK 2 4 5
245
395
950
–
2200
6300
IO SK 2 4 5
245
460
1050
–
2200
6300
IO SK 3 0 0
300
460
1050
850
2200
6300
IO SK 3 6 2
362
570
1300
950
2650
9955
IO SK 4 2 0
420
630
1425
420
680
1550
IO SK 5 5 0
550
680
1550
3200 3800 3200 3800 4200 3800 3800
11550
IO SK 4 2 0
1050 1175 1050 1175 1300 1175 1175 1300
4200
N otes: otes: (1 ) O th er ratin g s avai ava ilab le o n req u est
6
kV
Im pu p u lse w ith stan d test vo ltag e fu llw av a ve 1 .2 /5 0 µ s kV
11550
15125
h2
h1
h2
450
360
F ig . A
N et et w ei e ig h t ap p ro x.
Fig
kg
A A B A B A B B C B C B C C D C C D C C D C D D
160 200 380 200 380 220 390 470 700 470 700 470 700 900 1600 1000 1400 1700 1400 1600 2100 1400 2100 2300
D im en sio n
Fig .B
h2
450
Fig . C
h1
h2
h1
600
F ig. D
W eig h t o f o il
h1
h2
m
mm
kg
1215 1715 1825 1715 1825 1915 2025 2970 3080 2970 3080 2970 3080 3600 3720 4150 4745 4270 4745 5145 4870 4745 5020 5420
31 35 70 35 70 44 79 79 1 58 79 1 58 79 1 58 1 84 3 50 2 45 3 15 4 11 3 15 3 80 4 38 3 15 4 38 5 05
1630 2155 2400 2155 2400 2355 2600 3545 3745 3545 3745 3545 3745 4270 4570 4920 5515 5240 5515 5915 5840 5515 5990 6390
h1
7
Trench Facilities
The Trench Group is your partner of choice choice for electrical power transmission transmission and distribution solutions today; and for the development of your new technology technology solutions of tomorrow.
Trench ® Austria GmbH Paschinger Strasse 49 Postfach 13 A-4060 Linz-Leonding Austria Phone: 43-732-6793-0 Fax: 43-732-671341
Trench ® Limited Instrument Transformer Division 390 Midwest Road Scarborough, Ontario Canada M1P 3B5 Phone: 416-751-8570 Fax: 416-751-6952
Trench ® Brasil Ltda Via Expressa de Contagem, 2685 Contagem, Minas Gerais CEP 32370-485 Brazil Phone: 55-31-3391-5959 Fax: 55-31-3391-1828
Trench ® Limited Power Line Carrier Division 815 Middlefield Road, Unit 6A Scarborough, Ontario Canada M1V 2P9 Phone: 416-291-8544 Fax: 416-291-5581
Trench ® China MWB (Shanghai) Co., Ltd. No. 3658, Jiancheng Road Minhang, Shanghai Peoples Republic of China 200245 Phone: 86-21-54720088 Fax: 86-21-54723118
Trench ® France S.A. 16, Rue du Général Cassagnou B.P. 70 F-68 302 St. Louis, Cedex France Phone: 33-3 89-70-2323 Fax: 33-3 89-67-2663
Trench® High Voltage Products Ltd., Shenyang No. 2 Zhengliang Er. Road Jing Shen Xi San Street Dao Yi Economic Development Zone Shenyang 110136 P.R. China Phone: 86-24-89722688 Fax: 86-24-89737200 Trench ® Limited Bushing Division 432 Monarch Avenue Ajax, Ontario Canada L1S 2G7 Phone: 905-426-2665 Fax: 905-426-2671 Trench ® Limited Coil Product Division 71 Maybrook Drive Scarborough, Ontario Canada M1V 4B6 Phone: 416-298-8108 Fax: 416-298-2209
Trench ® Germany GmbH Nürnberger Strasse 199 D-96050 Bamberg Germany Phone: 49-951-1803-0 Fax: 49-951-1803-224 Trench ® Switzerland AG Lehenmattstrasse 353 CH-4028 Basel Switzerland Phone: 41-61-315-51-11 Fax: 41-61-315-59-00 Trench ® (UK) Limited South Drive Hebburn Tyne & Wear NE 31 1 UW Phone: 44-191-483-4711 Fax: 44-191-430-0633
www.trenchgroup.com E 217.11
Subject to change without notice (05.2006) Printed in Canada.
