LB12-220(W)
Adopting mature capacitive graded oil-paper insulation structure and high-purity insulating oil, the LB12-220(W) features uniform electric field distribution, low dielectric loss and stable heat dissipation performance. Equipped with a high-quality low-loss magnetic core, it maintains accurate current transformation ratio and low measurement error, effectively resisting strong electromagnetic interference in complex UHV grid environments.
Featured with a fully sealed integrated structure and metal expander, this 220kV current transformer thoroughly prevents oil leakage, moisture and dust intrusion. The high-strength anti-fouling porcelain sleeve with multi-layer anti-corrosion treatment supports stable all-weather operation in harsh environments, including high altitude, low temperature and coastal salt fog polluted areas.
Optimized with scientific winding layout and balanced structural design, the LB12-220(W) has strong overload resistance and low operating noise. It features multiple precision grade options, long service life and low daily maintenance, greatly reducing operational costs for 220kV power grid construction and renovation projects.
As essential core supporting equipment for 220kV ultra-high voltage power engineering, the LB12-220(W) outdoor oil immersed current transformer delivers excellent measurement precision and operational stability. We provide global customers with factory direct supply, complete certification documents and professional one-stop after-sales service.
Product Details
LB12-220(W)
oil-i mmersed type current transformer
□Introduction
□This type of transformer is applicable to electric power systems of 50Hz and 220kV,used for current,electic energy measuring and relaying protection.
□P rimary winding of the product has U-shaped capacitor type oil-paper insulation structure,uniform electrc field distribution,low dielectric dissipation rate, low partial discharge quantity,secondary winding usually has 4~6 windings,class can be combined at andom,we could produce transformers of class 0.2S for special purposes according to user's requirements,winding protection can be divided into steady state protection and transient state protection two types.
□This product is installed with stainless steel metal expander,the oil conservator is equipped with cooling fn,primary winding adopts thermal-siphon inside to promote circulation of oil flow,make it good for inner heat dissipation.
□This type of transformer is of outdoor type,is suitable for areas ofaltitude up to 2000m,ambient temperature within-30℃~+40℃ .
□ Technical data
|
Class combination |
Accuracy class |
Rated current ratio（A） |
Rated secondary load(cos =0.9)(VA) |
Accuracy Limit Coefficient (ALF)
|
Symmetrical short-circuit current multiple |
Instrument safety factor（FS） |
time constantT1(S) |
work cycle（S） |
Rated short-time thermal current（kA） |
Rated dynamic stability current(kA) |
Rated insulation level(kA) |
porcelain bushing creepage distance(mm) |
Oil weight(kg) |
total weight(kg) |
|
|
Tap{5clas) |
Full turns |
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|
P1/P2/0.2/TPY TPYITPY P1/P2/TPY/TPY TPY/TPY P1/P2/0.2S/TPY/TPY/TPY |
5P |
2×1250/5 (Tap can be) 2×600/5 2×750/5 2×800/5 |
|
60 |
20 |
|
|
|
|
(3S) 31.5 ~63 |
80 160 |
252/395/950 |
550 630 |
1200 |
3000 |
|
5P |
|
60 |
30 |
|
|
|
|
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|
0.2 |
40 |
50 |
|
|
≤5 |
|
|
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|
0.2s |
30 |
40 |
|
|
≤5 |
|
|
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|
TPY |
2×1250/1 |
|
10 15 20 |
|
10 15 20 |
|
0.06 0.1 |
C-0.1- C-0.5- C-0.1 0或(or) C-0.1-0 |
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