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Core Technology:
The transformer body adopts a high-temperature resistant mixed insulation system, with optimally selected matching parts, achieving a 30-year design lifespan.
The oil-immersed transformers use the basic structural form of traditional transformers. The core is of the core type, with high-voltage windings adopting pancake coils and low-voltage windings adopting wire-wound or foil-wound coils according to different capacities. The biggest difference from traditional transformers is the use of high-temperature-resistant insulation paper.
The insulation structure of oil-immersed power transformers of 35kV and below is a mixed insulation system, with conductor turn insulation using high-temperature resistant insulation paper, and lower temperature areas using insulation materials with lower temperature coefficients.
Performance Characteristics:
1. Low Loss
The core is made of high-quality, high-permeability cold-rolled silicon steel sheets. The Swiss core fully automatic stacking machine is used for longitudinal and transverse shearing, multi-level fully inclined joint fully automatic stacking. The core binding adopts overall pressing and PET tape binding technology, effectively reducing the transformer's no-load loss and no-load current. The performance indicators of the transformer are better than the national standard.
2. Low Noise
The electromagnetic noise of the core mainly causes the noise of oil-immersed self-cooling transformers. To reduce noise, our company has taken the following measures:
1) Low magnetic flux density design
2) High-quality high-permeability silicon steel sheets
3) Use of Swiss fully automatic stacking machines to control stacking precision
4) Reliable clamping and tightening measures
5) Special damping measures
3. No Leakage
The oil tank and oil conservator undergo positive and negative pressure leakage tests to ensure no oil leakage occurs during normal operation. The component installation adopts a flange groove structure, and all sealing elements use high-quality one-time-formed acrylate rubber parts to prevent oil leakage.
4. Strong Short-Circuit Resistance
To ensure that the transformer can withstand the impact of short-circuit current without causing any thermal or mechanical damage, our company has taken the following measures in the design and manufacturing process:
1) Reasonable ampere-turn balance calculation for transformer coils using semi-hard copper wire
2) Strength and stiffness calculations for core clamping components to meet safety requirements for maximum short-circuit mechanical forces
3) Densified treatment of winding spacers made of high-density hard cardboard
4) Overall assembly and compression of windings to ensure assembly precision and short-circuit resistance
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CEEG Transformer Production Base covers an area of over 600 acres (40 hectares), with a total construction area of 180,000 square meters and a workforce of more than 1,200 workers. Equipped with a complete set of world-class transformer production and testing equipment including cutting, vacuum casting, vacuum impregnation, and testing, it has an annual production capacity of 30 million kVA of power transformers.
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