Insulating cylinders are mainly used for winding to improve the mechanical strength of winding and short-circuit resistance.

In the coil winding, Strips are used as internal support for the winding and to form internal axial cooling oil channels. Main strips: Rectangular strips, T shaped strips, Trapezoidal strips and other shaped strips. The Strips produced by our company have the following advantages: high mechanical strength, high electrical strength, and precise product dimensions.

A radial cooling oil passage and insulation between segments are formed in the coil winding. The wire turns of the winding rely on Spacers to transmit axial compression force for compression, so Spacers must have a certain degree of compression
The compressive strength should be as small as possible, but there should be some elasticity.

Wedge spacers Generally, the height of radial wire turns is adjusted at the transition or insufficient turns of the coil, as well as at the transposition of the spiral coil. Flatten the transition point to prevent the scissor opening, allowing axial pressure to be evenly distributed on the cushion block, and avoiding excessive force on the cushion block.

In order to evenly distribute the electric field at the end of the winding and avoid breakdown under maximum impulse voltage. Clamping rings are often arranged at the end of the winding. During the operation of the transformer, it also bears the short-circuit effect. The skeleton of Clamping rings is made in the same way as the end ring, and wrapped with aluminum foil, wrinkled paper, etc.

Used to compress the entire coil and withstand short-circuit forces to improve the overall mechanical strength, the mechanical strength directly affects the short-circuit resistance of the winding.

The coil end is used to compress or support the coil, and also serves as the base ring of the electrostatic ring.

The rolled end coil is used for the combination of the two ends and the upper and lower parts of the coil; It can also be used to make electrostatic rings, which has a higher material utilization rate than laminated end rings.

Used for positioning support between iron core and clamps, side beams, upper beams, and foot pads; The commonly used material is electrical laminated wood.

Used for supporting and clamping fixed leads, it is the main insulation of the body.

Clackbands and toothbands form a good duct for oil flow between winding layers

Corrugated board is a commonly used oil gap insulation for small transformers, which has the advantage of simple assembly and improves the distribution of solid insulation materials in the oil passage. Compared with uniformly configured support bars in the radial direction, the solid insulation distribution in the oil passage of the corrugated board is very uniform, and there is no plane perpendicular to the electric field. Therefore, the strength of the oil passage can be increased by about 15% without losing reliability.