Analysis Of The Causes Of Frequent Shutdowns Of Dry-type Transformers During Operation

In the daily operation of the power distribution system, some dry cast resin transformers devices may experience operational interruptions or frequent protection actions. These phenomena are usually related to equipment operating conditions, internal structural conditions, and installation environment. If the number of outages continues to increase, it often reflects that the equipment operating parameters have deviated from the design conditions, requiring system analysis based on operating data and site conditions.

Changes in Operating Environment and Heat Dissipation Conditions

dry core transformer relies on air convection for heat dissipation. Ambient temperature, ventilation structure, and equipment layout all affect the temperature rise level. Some distribution rooms or box-type equipment have relatively enclosed internal spaces with limited airflow, easily leading to heat accumulation and increased winding temperature. Prolonged exposure to high temperatures can cause a decline in insulation performance, triggering protection devices to shut down.

Abnormal internal components of the equipment

The internal components of a dry distribution transformer typically include multiple structural units such as windings, core, leads, and connecting parts. With increased operating time, problems such as increased contact resistance, loose fasteners, or insulation aging may occur at local connection points. When load current passes through these parts, local overheating occurs, triggering relay protection or temperature control systems, forcing the equipment to shut down. Generally speaking, faults in dry power transformer are often concentrated in the windings, cooling system and related accessories, and the condition of these components directly affects the operational stability.