Identification And Response: How Arc Discharge Erodes The Internal Insulation Of Dry-type Transformers

Electric arcing is a highly destructive physical phenomenon in the operation of power equipment. When partial discharge occurs inside the 225 kva dry type transformer transformer and evolves into an arc, the instantaneous high temperature directly alters the physical properties of the winding structure. This irreversible damage often begins with minute insulation cracks, ultimately leading to unplanned shutdowns of the entire power supply system.

Physical Damage Reduces the Service Life of Dry-Type Transformers

The plasma channels generated by the arc possess extremely high heat, sufficient to melt metal conductors and carbonize the resin insulation layer. During the long-term service of the single phase dry type transformer transformer, this discharge phenomenon forms dendritic discharge traces. The formation of carbonized channels reduces creepage distances, turning previously insulated areas into conductive paths.

Specific Manifestations of Thermal Degradation of Insulation Materials

1. Chemical Bond Breaking: Under the influence of high-temperature arcing, the epoxy resin undergoes molecular chain degradation, releasing flammable gases.
2. Increased Mechanical Stress: Localized intense heating leads to uneven thermal expansion and contraction, inducing cracking of the insulation layer.
3. Increased Dielectric Loss: The presence of carbonized regions alters the electric field distribution, further accelerating insulation aging.

Abnormal Temperature Rise and Damage to the Structural Integrity of Dry-Type Transformers

Electrical arcing is not only an electrical fault but also a thermodynamic challenge. A sustained, weak arc can smolder the insulating medium, producing carbon black deposits. These impurities, under the influence of electromagnetic forces, distribute on the surface of the 500kva dry type transformer winding, disrupting the original heat dissipation logic. Heat accumulates internally and cannot dissipate, creating a vicious cycle that leads to inter-turn short circuits in the coil.

Electromagnetic Interference and its Impact on Monitoring Equipment

High-frequency arcing emits strong electromagnetic waves into space. These signals interfere with the sensors around device 30 kva dry type transformer, causing the monitoring data to become distorted. By analyzing the frequency and amplitude of the pulse signals, technicians can pinpoint the exact location of the discharge source. Timely capture of these discharge characteristics is essential for maintaining equipment performance indicators.