A high overload distribution transformer

Abstract

The invention provides a high-overload power distribution transformer, and belongs to the technical field of transformers. The transformer solves the technical problem that an existing transformer can not adapt to many environments. The high-overload power distribution transformer comprises a shell, an iron core arranged in the shell and an oil tank communicated with the shell, the iron core is of a three-phase four-frame five-column structure and comprises four independent iron core frames in parallel, the iron core frames are of a fillet rectangular shape and are made of an amorphous alloy material, and a canopy is fixed to the upper end of the shell. The transformer has the advantages of being capable of saving energy, efficient, environmentally friendly, little in no-load current, low in reactive power loss, high in sudden short-circuit resistance capacity and suitable for different environments.

Description

technical field [0001] The invention belongs to the field of transformers and relates to a high overload power distribution transformer. Background technique [0002] Distribution transformer, referred to as "distribution transformer". Distribution transformer refers to a static electrical device used in power distribution system to transform AC voltage and current according to the law of electromagnetic induction and transmit AC power. China's transformer products can generally be divided into UHV (750KV and above), ultra-high voltage (500KV) transformers, 220-110KV transformers, and 35KV and below transformers according to their voltage levels. Distribution transformers usually refer to power transformers operating in the distribution network with a voltage level of 10-35KV and a capacity of 6300KVA and below to directly supply power to end users. [0003] With the continuous deepening of China's "energy saving and consumption reduction" policy, the state encourages the ...

AI Technical Summary

Problems solved by technology

The operating temperature of general oil-immersed transformers is that the ambient temperature is not higher than 40°C and not lower than -25°C. For low-temperature environments, since the transformer will generate heat during operation, it can better adapt to low-temperature areas, but it does not rule out In some areas, extreme low temperature weather occurs, when the extreme low temperature occurs, the cooling oil in the transformer will freeze, and the low temperature will affect the iron core and copper wire, which will affect the performance of the distribution transformer; if it is only for the extreme low temperature weather Improving large-capacity transformers requires high investment costs and is uneconomical; in addition, in order to prevent the box from being wetted and corroded by rain, the existing transformers use awnings to solve this problem. The upper end surface is covered inside to solve this problem, resulting in poor air circulation around the box in fine weather, which affects the heat dissipation effect of the heat sink on the box

Images