Product description
The load loss of SCB18-2000KVA/10KV/0.4KV dry-type transformer accounts for 70% to 80% of the total loss, including the measurement loss of winding resistance (basic loss), the loss of conductor vortex, the loss of loop current between parallel winding resistors, and the wire consumption and separation loss of structural components (wood-based panels, steel plates, box walls, bolts, core plates, etc.). The key methods of SCB18-2000KVA/10KV/0.4KV dry-type transformer to reduce load loss are as follows.
SCB18-2000KVA/10KV/0.4KV dry-type transformer limits the additional loss caused by magnetic flux leakage. Carry out the balance calculation of the number of ampere rolls, and adjust the number of ampere rolls according to the results. The winding is sorted by “low-high-low” or “high-low-high”. Limit the width and thickness of the flat line. Choose the best position conversion method based on the magnetic field calculation.
SCB18-2000KVA/10KV/0.4KV dry-type transformer reduces the size of the main insulation structure and vertical insulation structure. The “Constant Impulse Voltage Gradient” technique is used throughout the high-voltage winding, which reduces the size of the vertical insulation. Thin paper tubes are used, and the oil gap between the coils is very small. Cartons are selected for main insulation. For the same shape, isopotential molded parts are selected to make the shape ring of the corner consistent with the shape of the equipotential line. Set the radial oil channel, commonly use acetaldehyde wire wrapping wire, and replace the 0.45mm thick paper-wrapped flat wire with Q-2 or QB acetaldehyde wire, because the first two insulation insulation is 2× (0.056-09.79) mm, the winding resistance index is high, and the winding insulation must meet the requirements. The road force is small; The spacing of the main insulation (diameter, tip) is moderately reduced.
SCB18-2000KVA/10KV/0.4KV dry-type transformer is selected according to the calculation and selection of the corresponding process. According to the impact calculation, the vertical insulation structure is determined, and the excellent shape of the chamfer of the backing plate, column and metal part is maintained. Measure leakage magnetic fields and vortices all over to guide the offset. The spools are evenly distributed. The key support is a non-magnetic material. The key supports and yokes are specially shielded to alleviate the electric field. The voltage regulating coil is connected successively. It adopts assembled type, and the inner coil is directly coiled. The height and diameter tolerance of the insulating cylinder are strictly controlled, the new technology of small inter-group gap volume and hot cover is selected, the overall load-bearing plate and pressure plate are selected, the pressure and drying DMD are selected when the winding position is replaced, and the winding resistance is placed in the dry insulation room to prevent moisture.
