LB7-220(W1)

LB7-220(W1) is a high-performance single-phase oil-immersed current transformer developed for 220kV ultra-high voltage power systems. Complying with IEC and GB international standards, this outdoor current transformer is widely used in 220kV main substations, backbone power grids and large new energy power stations for precise current monitoring, energy metering and system relay protection.
Adopting advanced capacitive graded oil-paper insulation structure and high-purity insulating oil, the LB7-220(W1) 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 ultra-low measurement error, effectively resisting strong electromagnetic interference in ultra-high voltage grid environments.
Featured with a fully sealed integrated structure and professional metal expander, this 220kV current transformer completely prevents oil leakage, moisture and dust intrusion. The high-strength anti-fouling porcelain sleeve with multi-layer anti-corrosion treatment supports stable long-term operation in harsh environments, including high altitude, low temperature and coastal salt fog polluted areas.
Optimized with scientific U-shaped winding layout and balanced structural design, the LB7-220(W1) has excellent overload resistance and low operating noise. With multiple combinable secondary windings and optional precision grades, it adapts to diverse ultra-high voltage power engineering demands, featuring long service life and low daily maintenance costs.
As essential core supporting equipment for 220kV ultra-high voltage power engineering, the LB7-220(W1) outdoor oil immersed current transformer delivers superior measurement precision and operational stability. We provide global customers with factory direct supply, complete certification documents and professional one-stop after-sales service.