40.5kV 72.5kV 126kV 145kV Transformatorem currentis in oleo immersum

Product introduction:
Series LVB current transformers feature oil-impregnated paper insulation and an inverted structure, complying with IEC/IEEE standards. Installed in power lines, these series-connected transformers enable functions including energy measurement, metering, relay protection, and transient protection.

Product features:

• Robust Primary Winding Design
  The through-type conductive rod structure ensures exceptional dynamic and thermal stability, with a maximum thermal stability current of 63kA/3s (in series configuration).

• Ultra-Precise Measurement
  The primary winding passes through the center of the secondary winding, eliminating magnetic flux leakage and achieving measurement accuracies of 0.2S and 0.1.

• Enhanced Secondary Protection
  Secondary windings are encapsulated in an aluminum-shielded housing with organic materials, safeguarding measurement and protection circuits from electrical breakdown.

• Advanced Capacitor Screen Bushing
  Wound by a high-performance computer-controlled automatic wrapping machine using imported wide-width cable paper, the bushing ensures minimal process variation and excellent insulation. Partial discharge tests are conducted under power frequency voltage to guarantee reliability.

• German-Made Vacuum Drying Technology
  Utilizing a LEYBOLD imported fully automatic vacuum drying system, the transformer undergoes variable-pressure vacuum drying and oil injection after assembly. Fully imported insulating materials ensure the overall dielectric loss factor (tanδ) remains below 0.3%.

• Uniform Insulation Wrapping
  The head insulation is applied by an automatic binding machine, ensuring consistent, tight, and uniform wrapping for optimal performance.

• Weatherproof Secondary Outlet Box
  The one-piece aluminum alloy casting features a dust-proof, waterproof, and breathable sealing structure for reliable outdoor operation.

• Leakage-Proof Construction
  All component connections use argon arc welding, and the assembly is leak-tested with high-pressure nitrogen, eliminating oil leakage issues typical in oil-immersed products.

• Corrosion-Resistant Materials
  The shell, base, and junction box are crafted from aluminum alloy, while the expander and nameplate use stainless steel—all exposed parts are rust-proof for lifelong durability.

• Maintenance-Free Operation
  Designed for minimal upkeep, the transformer reduces long-term operational costs and downtime.

Technical parameter:


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