Transformer-specific insulating pads

I. Core Product Performance
1. Electrical Insulation Performance
High Breakdown Strength: Power frequency breakdown strength ≥20kV/mm, able to withstand high voltage surges, effectively isolating transformer windings, busbars, and other energized components from grounding structures, preventing short-circuit faults, and meeting the insulation requirements of medium and high voltage transformers.
Stable Insulation Resistance: Volume resistivity ≥10¹⁴Ω·m, stable surface resistivity, minimal performance degradation under high temperature and high humidity environments, no risk of increased leakage current, ensuring long-term insulation reliability of equipment.
Low Dielectric Loss + Corona Resistance: Low energy loss under high-frequency electric fields, reducing equipment operating heat generation and delaying insulation aging; excellent corona resistance, resisting electrical erosion caused by partial discharge, extending service life.
Flame Retardancy Compliance: Meets UL94 V-0 flame retardant standards, self-extinguishing upon contact with open flame, effectively preventing the spread of transformer fires and improving equipment safety.

2. Physical and Mechanical Properties
Excellent Mechanical Strength: High tensile and compressive strength, strong bending resistance, suitable as a support component to withstand winding weight, winding stress, and operating vibration without deformation or breakage risk.
Good Dimensional Stability: Dense structure and low shrinkage after curing; no significant shrinkage/expansion with temperature fluctuations or humidity changes, maintaining fit with transformer components and ensuring stable insulation gaps.
Flexible Machinability: Can be drilled, milled, and cut; can be customized with complex shapes and strict dimensional tolerances, adapting to diverse needs such as coil frames and insulating partitions.

3. Environmental and Chemical Resistance
Strong Heat Resistance: Heat resistance rating covers Class B (130℃) to Class H (180℃), able to withstand the high operating temperatures of transformers; physical and chemical properties do not deteriorate under long-term high-temperature conditions, and there is no softening or deformation.
Moisture and Corrosion Resistant: Extremely low water absorption rate; insulation and mechanical properties remain unchanged even in humid environments; withstands transformer oil, common acid and alkali mists, and oil contamination without swelling or cracking, suitable for complex environments such as humid and chemical zones.
Transformer Oil Compatibility: Stable performance even after long-term immersion in transformer oil; no components leach, does not affect the insulation effect of the transformer oil, suitable for use inside oil-immersed transformers.