LB7-220
Adopting high-quality magnetic core and precision winding process, the LB7-220 features extremely low measurement error and outstanding conversion accuracy. It maintains stable current transmission performance, providing accurate data support for electric energy metering and power grid operation monitoring.
Equipped with mature oil-immersed insulated structure, the transformer has excellent dielectric strength and arc resistance. It can effectively resist high voltage impact and complex electromagnetic interference, ensuring long-term safe and stable operation of power equipment.
Adopting fully sealed integrated design, the product has excellent waterproof, dustproof and anti-aging properties. It adapts to harsh outdoor environments such as high altitude, humidity and extreme weather, realizing all-weather stable operation.
With reasonable structural design and high mechanical strength, LB7-220 is easy to install and requires low daily maintenance. It effectively reduces operation and maintenance costs for 220kV power grid construction and renovation projects.
As core measuring and protecting equipment for 220kV UHV power systems, LB7-220 current transformer boasts high precision and strong environmental adaptability. We provide global customers with factory direct supply, complete certifications and professional one-stop after-sales service.
Product Details
LB7-220(W1)
(Original LCWB7-220(W1))
oil-immersed type current transformer
□ Introduction
□This type of current transformer is applicable to electric power systems of 220kV and 50Hz,used for current,electric energy measuring and relaying protection.
□The product is equipped with metal expander,full-sealed structure,primary winding has U-shaped capacitor type insulation structure,low dielectric dissipation rate,low partial discharge quantity,secondary winding usually has 4~6 windingsclass can be combined at random,we could produce current transformers of measurement class accuracy of0.2S for special purposes according to user's requirements.
□This type of current transformer is of outdoor type,LB7-220 is suitable for areas of altitude up to 1700m;LB7-220W1 type is suitable for polluted areas of altitude up to 1700m,ambient temperature is-30℃~+40℃, outline and installation dimensions as shown in diagram.
□Technical data
|
(A) Rated current ratio (tap current ratio) |
Class combination |
Accuracy class |
(VA) Rated output |
Accuracy limit factor |
(kA) Rated short-time themalcurent |
(kA) Rated dynamic stable current |
(kA) Rated insulation level |
porcelain bushing creepage distance(cm) 三 |
Oil weight/Total weight(kg) |
|
|
满匝数 Full turn number |
抽头 tap |
|||||||||
|
2×600/5 (2×300/5) 2×750/5 (2×400/5) 2×800/5 (2×400/5) 2×1000/5 (2×500/5) 2×1200/5 (2×600/5) 2×1250/5 (2×750/5) |
P1/P2/P1/0.5(0.2) P1/P2/P1/P1/0.5(0.2) P1/P2/P1/P1/P1/0.5(0.2) P1/P2/P1/0.5/0.2 P1/P2/P1/P1/0.2S P1/P2/P1/P1/P10.2S |
5P 10P |
50 |
|
20 |
(5s) 21-42 (or)或(3s) 31.5-63 |
55-110 或(or) 80-160 |
252 / 395 / 950 |
410 |
365 / 1300 |
|
5P 10P |
50 |
25 |
|
|||||||
|
|
50 |
12.5 |
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|
0.5 |
50 |
40 |
|
550 |
||||||
|
0.2 |
50 |
40 (0.5class) |
|
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|
0.2S |
50 |
40 (0.5class) |
|
630 |
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