50kva 0.4kv Amorphous Alloy Distribution Transformer

Wenzhou XiFa Electric Power Equipment Co., Ltd is equipped with advanced production facilities and a well established enterprise management system. We strictly adhere to IEC industry standards to ensure that the product quality is more reliable and stable. In order to optimize the transformer and reduce its no load loss, Wenzhou XiFa Electric has manufactured the 50kva 0.4kv amorphous alloy distribution transformer. On the one hand, the production energy consumption of amorphous alloy cores is only 20% of that of silicon steel, which can effectively reduce carbon emissions. On the other hand, its low noise feature makes it a suitable solution for environments that are sensitive to noise.

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Product Description

Many countries in Southeast Asia, Africa, Central Asia and Latin America are vigorously promoting the upgrading of rural power grids and rural electrification projects. In remote areas, the load rate has remained consistently low (20% - 35%). The energy saving advantages of amorphous alloy distribution transformer in no load operation have been maximized, making them the preferred choice for local power supply bureaus in tenders. Distributed household photovoltaic and small scale industrial and commercial photovoltaic grid connections are equipped with 50kVA level distribution transformers. With the continuous growth of global photovoltaic installations, the demand for small capacity amorphous alloy distribution transformers has also increased.

The transformer uses amorphous alloy strips as the core material. This amorphous alloy is formed into an amorphous structure through a rapid cooling process, featuring extremely low hysteresis loss and no load current. Its electromagnetic performance far exceeds that of traditional silicon steel sheets. 50kva 0.4kv amorphous alloy distribution transformer has a lower working temperature rise, thereby reducing the aging of insulation materials and extending the service life of the equipment. The oil immersed cooling technology effectively solves the heat dissipation problem under high temperature loads. The 50kva 0.4kv amorphous alloy distribution transformer oil serves as the cooling medium, preventing overheating and faults, and enhancing the overall reliability and safety.

50kva 0 4kv Amorphous Alloy Distribution Transformer

Technical parameter：

Product Name	50kva 0.4kv amorphous alloy distribution transformer
Voltage Ratio	10±2×2.5%kV / 0.4kV
Connection Method	Dyn11
Cooling Method	ONAN
P₀	43W
Pk@120℃	870W
Uk%	4%
No load Current	≤1.3%
Rated Frequency	50 Hz
Voltage regulating mode	Off circuit Tap Changer

Q: Can this 50kva 0.4kv amorphous alloy distribution transformer change the standard Dyn11 connection group to Yyn0?

A: Yes, this 50kva 0.4kv amorphous alloy distribution transformer can have its connection group type changed from the standard Dyn11 to Yyn0. Technically, this is feasible, but there are drawbacks in its use:

1. Third harmonic cannot be suppressed: There is no triangular closed winding on the high voltage side, so the third harmonic magnetic flux of the iron core cannot form a circulating loop, the neutral point potential on the low voltage side is offset, and the three phase output voltage is changed. When there is an unbalanced load in single phase loads, a large zero sequence current appears on the neutral line, and the neutral line overheats abnormally.

2. Poor ability to handle unbalanced loads: Civilian power distribution mainly consists of single phase lighting and household appliance loads. Three phase loads are prone to imbalance. Under the Yyn0 condition, the 50kva 0.4kv amorphous alloy distribution transformer’ s voltage distortion is severe, and it is easy to burn out end lamps, small motors, and precision electrical equipment. The Dyn11 high voltage triangular winding can form a circulating loop to digest the third harmonic, and the voltage stabilization effect is excellent.

3. Limited grid connection access: Mainstream power grids and photovoltaic grid connection projects worldwide have mandatory stipulations for Dyn11, and Yyn0 models cannot pass the grid connection acceptance of the power supply bureau and cannot be connected to the municipal public network.