3、 Introduction to the Characteristics and Structure of LB7-110W2 (LB7-126W2) Series High Voltage Transformers

This type of current transformer is an oil immersed fully sealed insulation structure, with the main insulation being a capacitive oil paper composite insulation. The primary winding is a deformed "U" byte shaped 1/4 aluminum tube or semi-circular aluminum tube or semi-circular copper tube, which improves the dynamic and thermal stability of the product; The device is installed in an oil tank filled with transformer oil and undergoes vacuum drying and oil immersion treatment; The primary output terminal is drilled on the upper part of the porcelain sleeve and can be connected in series or parallel outside the porcelain sleeve, or outside the oil storage tank; A stainless steel metal expander is used as the oil compensation device, and the oil level indicator is indicated by the pointer position on the upper window of the expander. The secondary winding can be combined arbitrarily according to user needs, with strong load capacity. The internal electric field distribution is uniform and the field strength is low, with low partial discharge.

4、 Technical parameters of LB7-110W2 (LB7-126W2) series high-voltage transformer

Rated insulation level kV	126/230/550
Rated primary current A	2×50～2×1250
Rated secondary current A	5 or 1
accuracy level	0.2S, 0.5S, 0.2, 0.5, 5P, 10P can be equipped with taps according to requirements
Rated output VA	20. 30, 40, 50, 60, etc
Number of secondary coils	3~8
Accurate level combination	Any combination of 0.2S/0.5/5P/5P/5P, etc
Measurement level instrument security factor	Fs≤5
Protection level accuracy limit coefficient	10. 15, 20, 25, 30, 35, 40, etc
Short time thermal current kA/s	22.5~50/1, can be specially designed according to user needs
Rated dynamic stability current kA	56.25~125, can be specially designed according to user needs
Product dielectric loss factor	≤0.005
Partial discharge amount pC	≤5
Radio interference level μ V	≤250
External insulation creepage distance mm	31503906, etc
Product altitude m	≤3500

5、 LB7-110W2 (LB7-126W2) series high-voltage transformer appearance and installation dimensions




LB7-110 series high-voltage transformer