12KV oil immersed transformer
The 12kV fully-sealed oil immersed power transformer shows advantages of low loss, low noise and high efficiency, which achieve good energy-saving effect and reduce pollution. Compared with the normal oil immersed transformer, the fully-sealed transformer cancels the external oil tank. The change of oil volume is automatically adjusted and compensated by the elasticity of the corrugated sheet of the corrugated oil tank. The transformer is isolated from the air to prevent and slow down the oil deterioration and aging of the insulation. This enhance the operation reliability, and free maintenance under normal operation.
·Service conditions
1. The maximum ambient air temperature shall not exceed 40 ℃, and the minimum shall not below - 25 ℃;
2. The altitude shall not exceed 1000m. If special customized transformers and low-voltage components are used, the altitude can reach 4000m;
3. The vertical inclination is no more than 5°, and no violent vibration and impact;
4. The air humidity is not more than 90% (+ 25 ℃);
5. No gas and conductive dust that will seriously affect the insulation of transformer, no explosion hazard and corrosion of electrical components;
6. Outdoor wind speed shall not exceed 35m / s.
7.If service conditions beyond the above, specially customized product is available.
·Structural features
1. The transformer core is made of folded import high-quality cold-rolled silicon steel sheet, which greatly reduces no-load loss and no-load current. The core is bound to ensure the compactness and reduce noise.
2. The high and low voltage winding is made of oxygen-free copper,. The low voltage winding of 500KVA and below is of double-layer barrel structure, and of 630kVA and above is of double helix or four helix structure. The high-voltage winding normally adopts multi-layer barrels structure.
3. Dyn11 method is applied to the transformer connection to reduce the influence of harmonics on the power grid and improve the quality of power supply.
4. The transformer is a fully-sealed structure, which can extend its service life, free of core -lifting and maintenance.
5. The measured noise value is lower than the standard. After normal transportation, this series of transformers can be installed with relevant parts and components without core- lifting inspection, and can be put into operation after passing the acceptance test.
Note: Due to continuous product improvement, the dimensions provided in this sample are for reference only. If necessary, our company can design and produce according to user requirements. Please contact the company in time.
| Main technical parameters |
| Main circuit rated voltage(V) | .......................... | Ac 400 (600) |
| Rated voltage of auxiliary circuit (V) | .......................... | Ac 220/380 (400) dc 110/220 |
| Rated frequency (Hz) | .......................... | 50(60) |
| Rated insulation voltage(V) | .......................... | 690(1000) |
| Rated current(A) | The level of bus | ≤6000 |
| Rated short-time bus withstand current (kA/1s) | .......................... | 50,80 |
| Rated peak withstand current of bus (kA/0.1s) | .......................... | 105,176 |
| Power frequency test voltage (V/1min) | main circuit | 2500 |
| Auxiliary circuit | 1760 |
| bus | Three-phase four-wire system | A,B,C,PEN |
| Three-phase five-wire system | A,B,C,PE,N |
| Protection grade | .......................... | IP30 |
·Order instructions:
1. The customer needs provide main parameters of the transformer (input and output voltage, capacity, loss, etc.)
2. Other customer requirements
Workshop pictures:
Package Details:
Product Tags:
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