Insulation Ladder Duct For Oil Immersed Transformer Use

The electrical insulation duct is made of electrical board in the shape of stripe adhered to DDP(Diamond Dotted Insulating Paper) or Insulation presspaper. This design allows it to form a tight, secure combination with the transformer coil, significantly enhancing the coil's mechanical strength and electrical performance. It is widely used in oil-immersed transformers.

Chengrui Insulation supplies electrical insulation duct barriers for transformer manufacturers, coil winding workshops, and insulation parts processors. These parts are usually made from transformer pressboard according to the transformer design, and are used to separate winding sections, maintain insulation clearance, form oil ducts, and support oil flow inside transformer windings.

Key Features:

• High Purity and Superior Oil Absorption: The material exhibits excellent oil absorption, ensuring thorough impregnation and reliable performance within the transformer oil.

• Excellent Dielectric Compatibility: It demonstrates good compatibility with liquid dielectrics, maintaining strong insulation strength and stability in the oil environment.

• Secure Coil Integration and Enhanced Reliability: The strip combines firmly with the transformer coil, effectively eliminating the variability and tendency for displacement associated with traditional corrugated cardboard. This secure integration provides the coil with more durable and excellent mechanical and electrical properties, making it a preferred choice for oil-immersed transformers.

Typical Applications

Electrical insulation ducts are commonly used in:

• oil-filled power transformers

• distribution transformers

• winding assemblies

• coil insulation structures

• transformer insulation component sets

They are especially relevant in designs where oil duct arrangement and internal spacing are important.

Customization Options

We can produce electrical insulation duct barriers according to customer drawings, samples or confirmed dimensions.

Customization can include:

• thickness

• width

• length

  
  
  

If you are sourcing electrical insulation duct barriers for transformer projects, Chengrui Insulation can support drawing-based production, sample approval and batch supply in transformer pressboard, laminated pressboard or laminated wood.

Contact us with your drawing, sample or specification for quotation and technical review.