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:
