33kv 2.5 Mva Oil Immersed Amorphous Alloy Core Transformer

In order to meet the users' demand for high quality and low loss electricity, Wenzhou XiFa Electric Power Equipment Co., Ltd has produced and manufactured 33kv 2.5 mva oil immersed amorphous alloy core transformer. It is made of green and energy saving amorphous alloy material. When operating under a state of light load or no load for a long period of time, the annual savings in electricity costs are considerable. Usually, the higher initial purchase cost can be recovered through the electricity savings within 3 to 5 years.

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Product Description

The core of 33kv 2.5 mva oil immersed amorphous alloy core transformer is made by closed loop winding of iron based amorphous alloy strips. The integrated structure without laminated air gaps significantly reduces hysteresis and eddy current losses. Compared with traditional silicon steel cores, the no load loss is greatly reduced. The core column and yoke are bonded together by epoxy glass adhesive, making the overall rigidity stronger and effectively suppressing operating vibration and noise.

The 33kv 2.5 mva oil immersed amorphous alloy core transformer’s windings use high purity copper conductors and are combined with a multi layer insulation coating process suitable for high voltage conditions. Combined with the improved spiral and continuous interleaved winding structure, it evenly distributes the winding electric field, which improves insulation tolerance and resistance to deformation. The high voltage side of 33kv 2.5 mva oil immersed amorphous alloy core transformer is equipped with ±2×2.5% no excitation voltage regulation gears, which can precisely adapt to the regulation requirements of grid voltage fluctuations.

The box body is formed by integral welding of corrugated steel plates. Relying on the adaptive heat exchange structure of the corrugated shell, it can achieve efficient natural circulation cooling of insulating oil without the need for an external heat dissipation device, suitable for long term continuous operation. The 33kv 2.5 mva oil immersed amorphous alloy core transformer is filled with environmentally friendly mineral insulating oil in accordance with IEC 296 standards, which combines excellent thermal conductivity and insulation performance, effectively isolating internal live components and avoiding insulation breakdown risks.

33kv 2 5 Mva Oil Immersed Amorphous Alloy Core Transformer

Technical parameter:

Product Name	33kv 2.5 mva oil immersed amorphous alloy core transformer
Rated Frequency	50 Hz / 60 Hz (customizable)
High Voltage (HV)	33 kV
HV Tap Range	±2×2.5% or ±5%
Low Voltage (LV)	0.4 kV (400V); Custom: 415V, 433V, 480V
Connection Group	Dyn11 (standard); Yyn0 optional
Cooling Type	ONAN
Insulation Class	Class A
Insulation Level	HV: LI170AC70 / LV: LI10AC3
P0	≤ 1080 W
Pk@75℃	≤ 16800 W
Short circuit Impedance	6.5 % ; Optional: 6% / 7% / 8%
No load Current	≤ 0.45 %

Key Features:

1. Ultra energy saving: Utilizing amorphous alloy cores, the no load loss is reduced by approximately 70% to 80% compared to traditional S9/S11 type silicon steel sheet transformers. 33kv 2.5 mva oil immersed amorphous alloy core transformer is particularly suitable for long term operation in rural power grids and industries where the load is not always at full capacity.

2. Fully sealed maintenance free: The oil tank adopts a fully sealed structure to prevent oil from contacting air, avoiding insulation oil from getting damp and aging. 33kv 2.5 mva oil immersed amorphous alloy core transformer can achieve a maintenance free lifespan of 50 years and is suitable for harsh outdoor environments.

3.High reliability: The low voltage winding is wound with copper foil, while the high voltage winding is wound with copper wire. With strong short circuit resistance and resistance to lightning strikes, the structure is compact,