LB Oil- immersed Hair Pin Current Transformer

LB series current transformers are of oil immersed fully sealed insulation structure. The primary winding is U-type. The body is fixed at the bottom of the box. The main insulation is capacitive oil-paper insulation, which is wrapped around the primary winding with high-voltage cable paper. Several capacitance screens are set between them. The inner screen is connected to the high potential, and the outer screen can be grounded. 

The upper part of the oil tank is equipped with a porcelain bushing. The primary outlet terminal is on the top of the porcelain bushing. The series and parallel connection are external exchange devices, that is, they can be exchanged outside the porcelain bushing. 

The stainless steel expander is used as the oil compensation device to ensure the oil quality. The oil level indication of the product is indicated by the eye-catching displacement indication of the upper window of the expander. 

The product can be equipped with 4-6 secondary windings. The secondary measurement windings made of microcrystalline alloys with high magnetic conductivity can ensure the measurement accuracy to reach class 0.2 or 0.2S × The secondary winding of 600A and above current transformer measurement level has taps to achieve two current ratios. 

The secondary terminal 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.