3 Phase Variable Auto Transformer

Kechang's 3-Phase Variable Auto Transformer is designed with segmented windings and high-precision voltage regulating mechanisms. The voltage regulation range covers 380V-480V, and the adjustment accuracy is ±0.5%, which is far better than the conventional level in the industry.By optimizing the design of the magnetic flux loop, the voltage waveform distortion rate is controlled within 1%, without additional harmonic interference, and it can be accurately adapted to scenarios with strict power quality requirements such as precision instruments and inverter debugging. It is an ideal choice for precision voltage-regulating transformer.

• In the long-term operation of voltage regulating equipment, the aging of winding insulation is the main cause of failure, especially under high temperature and high load conditions.
• The risk is higher.The equipment adopts VPI vacuum pressure dip paint process to treat the windings, and is filled with H-grade insulation materials and Nomex paper layers.
• The insulation system can withstand high temperatures of 180℃, effectively delaying the aging rate of insulation.After rigorous testing, the partial discharge volume is controlled below 10pC, and the insulation resistance is stable in the high standard range. Even under long-term full-load operation, the hidden dangers of insulation breakdown can be avoided, and the expected service life can reach more than 25 years.
• With a 2-year warranty policy, it provides a guarantee for long-term stable operation.

When the load exceeds 70% or the temperature rise reaches the set threshold, the low-noise fan is automatically activated and switched to forced air cooling, and the heat dissipation efficiency is increased by 40% to ensure that the temperature rise is controlled within the allowable range of Class F insulation.The fan adopts a silent design, the operating noise is less than 50dB, which conforms to IEC noise standards, and is suitable for indoor precision scenes.

• In industrial scenarios, power grid harmonics and voltage fluctuations can easily interfere with voltage equipment and affect operating stability.
• The equipment has a built-in EMC filter module, which can effectively resist external electromagnetic interference, while avoiding secondary pollution to the power grid from its own operation, and complies with IEC 61000 series electromagnetic compatibility standards.
• In view of abnormal conditions such as instantaneous voltage drops and surges in the power grid, it is equipped with overvoltage, overcurrent, and phase loss protection functions, which can quickly cut off the circuit and protect the safety of the back-end equipment.

• There are generally limited space problems in scenarios such as laboratory and workshop transformation, and the volume and ease of installation of equipment are of vital importance.
• The equipment adopts a lightweight and compact design, which is more than 25% smaller in size than traditional products, supports vertical and horizontal installation methods, and can be flexibly adapted to different installation spaces.The terminal blocks are clearly laid out and equipped with standardized copper bar interfaces.
• Only wiring and fixing need to be completed on site, and installation and commissioning can be completed in 1-2 hours without complex calibration processes.The fuselage is equipped with a visual operation panel, the pressure regulating knob is accurate and smooth, the operation difficulty is low, and it can be quickly started without professional operation and maintenance personnel.

• Kechang can customize different capacity configurations from 50kVA to 2000kVA according to the actual project, flexibly adjust the input and output voltage range, and adapt to the needs of multiple voltage levels such as 110V, 220V, and 380V.For extreme scenarios such as high temperature, high humidity, and high altitude, the insulation process and cooling system can be optimized to ensure stable equipment performance; at the same time, it supports the installation of remote voltage regulation modules and data acquisition modules to meet the needs of intelligent operation and maintenance.
• The engineering team will issue a customized plan and quotation within 48 hours, and provide exclusive installation guidance to create a custom 3-phase auto transformer solution that accurately matches the needs of multiple scenarios.