Sieyuan Oil Immersed Current Transformers (CTs)

LVB series current transformers are of oil impregnated paper insulation and inverted structure to meet the IEC/IEEE standard. The series connected transformer in the line has the functions of electric energy measure-ment, metering, relay protection and transient protection.

• The primary winding is of through type conductive rod structure, with good dynamic and thermal stability. The maximum thermal stability current is 63kA/3s (when the primary winding is in series).
• The primary winding passes through the center of the secondary winding without the influence of magnetic flux leakage, and the measurement accuracy reaches 0.2S and 0.1.
• The secondary winding is poured into the aluminum shield housing with organic materials, and the measuring and protection lines at the secondary side will not be subject to electrical attack due to insulation breakdown.
• The optimized capacitor screen bushing is wound by a high-performance computer controlled full-automatic wrapping machine with a whole sheet of imported wide width cable paper. The process dispersion is small, and the insulation performance is excellent. The partial discharge test is conducted under the power frequency test voltage.
• The fully automatic vacuum drying treatment system imported from Germany LEYBOLD is adopted. After the overall assembly of the product, the new process of variable pressure vacuum drying treatment and oil injection is carried out. The fully imported insulating materials ensure that the overall dielectric loss factor tand of the product is less than 0.3%.
• The head insulation of the product is wrapped with an automatic binding machine, and the insulation wrapping of the product is uniform, tight and consistent.
• The secondary outlet box is cast with aluminum alloy as a whole, with a dust-proof, waterproof and breathable sealing structure.
• The connection between product parts adopts argon arc welding, and the whole assembly is filled with high-pressure nitrogen for leak detection, which fundamentally solves the problem of oil leakage of oil immersed products.
• The shell, base and junction box are all made of aluminum alloy. The expander and nameplate are made of stainless steel. All exposed parts will never rust.
• The product is maintenance free.

Remark: Approximate dimensions and weights for special requirements, please consult us.

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DIN-style switchgear (EFEN or third-party brand)

Street lighting and other auxiliary supplies

MDI’s / metering / monitoring

Other switchgear or control gear

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