High overload distribution transformer
Robust High-Voltage Winding Design: The multi-layer cylindrical winding provides balanced ampere-turn distribution, low leakage flux, and high mechanical strength, ensuring excellent short-circuit resistance.
Enhanced Structural Stability: The core, windings, and all connection components are firmly secured with anti-loosening nuts, and the non-lifting core structure allows the transformer to withstand vibration during transportation.
Superior Moisture Control and Reliability: Vacuum drying of coils and core, combined with vacuum oil filtration and filling, effectively minimizes internal moisture to improve operational reliability.
Self-Regulating Corrugated Oil Tank: The corrugated tank design enables natural breathing to compensate for oil volume changes due to temperature fluctuations, enhancing durability and stability.
The high-voltage winding features a multi-layer cylindrical design, ensuring uniform ampere-turn distribution, reduced leakage flux, excellent mechanical strength, and strong short-circuit resistance. Both the core and windings are firmly secured with dedicated fastening structures, and the high- and low-voltage leads utilize self-locking nuts to prevent loosening. The transformer adopts a non-lifting core design, allowing it to endure transportation-related vibrations. The coils and core are vacuum-dried, while the transformer oil is processed through vacuum filtration and filling to effectively reduce internal moisture. The oil tank is constructed with corrugated panels that provide a breathing function to accommodate oil volume changes caused by temperature fluctuations.
Product Description
High overload distribution transformers are specially designed to solve the issue of short-term, rapid surges in electricity demand. These situations typically occur when the load remains low for most of the year but spikes sharply for about ten days to half a month, reaching 1.5 to 2 times the rated load and staying concentrated within a 2–3 hour period. Typical examples include load peaks during the Spring Festival and agricultural busy seasons in rural power grids.
Performance Characteristics
This transformer is engineered for rural power systems with low annual average load rates but significant short-term load increases during the Spring Festival and peak farming periods. It supports long-term low-load operation while meeting short-term overload requirements, all while maintaining essential power capacity.
High overload distribution transformers offer advantages such as energy saving, high efficiency, environmental protection, low no-load current, reduced reactive power loss, and strong resilience against sudden short circuits.
Application in Power Grids
High overload transformer technology was developed to enhance the operational safety and economic performance of rural power grids. Although rural grids typically operate under low average loads, they experience concentrated and dramatic load increases during peak periods like the Spring Festival. Conventional transformers can easily become severely overloaded or even damaged under these conditions. However, simply increasing transformer capacity is not ideal, as it leads to an oversized transformer that is inconsistent with economical power grid operation.
