China Three-Phase Isolation Transformer Supplier

As Zhejiang Yibaling Power Equipment Co., Ltd., we have been deeply engaged in the field of three-phase isolation transformers for over twenty years. From industrial settings to medical environments, we have always focused on the research and manufacturing of high-performance and highly reliable power equipment.
Relying on solid technical accumulation and a mature supply chain system, our products have not only deeply participated in multiple key projects at home and abroad, but have also spread to power systems in dozens of countries and regions around the world.

Product Advantages

In our understanding, the core of an excellent three-phase isolation transformer lies in achieving pure isolation between the input and output.
Through the design of three independent windings and in combination with the principle of electromagnetic induction, we effectively prevent mutual interference between circuits and significantly suppress voltage surges, thereby providing a more stable and cleaner power environment for the load side.
The advantages of these transformers are evident in all aspects: starting from the selection of materials, we insist on using high-quality silicon steel sheets and all-copper windings to minimize no-load losses and enhance overall energy efficiency.
The additional electrostatic shielding layer and multiple insulation designs inside further enhance the equipment's withstand voltage strength and safety reliability; and in our high-end series, we adopt H-class insulation combined with vacuum impregnation technology to ensure that the products can operate stably for a long time even in humid, dusty or environments with significant temperature differences in industrial settings.
Today, Yibaling three-phase isolation transformers have been widely used in various fields such as CNC machines, precision electronic equipment, and medical imaging systems.
Choosing us is not just choosing a piece of equipment, but also choosing a continuous, stable and secure energy guarantee. We believe that reliable power is the foundation for all stable operations.

Why choose the three-single transformers?

Their manufacturing costs and floor space are much lower than those of three single-phase transformers combined with the same capacity.
In terms of performance and efficiency, this integrated design significantly reduces no-load losses (iron losses) and makes operation more energy-efficient; at the same time, it inherently outputs balanced and symmetrical three-phase power, which can effectively support large-power three-phase motors and other loads, avoiding problems such as neutral line overcurrent, additional losses, and voltage fluctuations caused by three-phase imbalance, and providing higher power quality.
From the perspective of system management, as a single unified device, its protection, monitoring, and cooling systems are centralized, reducing fault points and making maintenance and operation more convenient.
Therefore, in scenarios such as factories, buildings, and data centers that require centralized high-power power supply, three-phase transformers have overwhelming advantages in terms of comprehensive costs, space utilization, energy efficiency, and reliability, and are the standard foundation of industrial power distribution systems; while single-phase transformers are more suitable for small-capacity, distributed, or scenarios where they supply local single-phase loads within a three-phase system.

Customization Process

1. Electrical performance details:

Not only does it require "capacity of 1000kVA", but it is also necessary to specify "load curve" and overload capacity (such as "load of 110% can be sustained for 2 hours").
Specify the exact commitment values for no-load loss (Po) and load loss (Pk), as these directly determine the quantity of silicon steel sheets and copper materials to be used.
Short-circuit impedance (Uk%) should be specified with the exact value and the allowable tolerance (e.g. 6.0% ±5%), as this affects the winding design and the short-circuit resistance capability.

2. Specification of materials and insulation grades:

Core material: Specify the silicon steel sheet grade. For instance, is it using the domestic 30QG120, or the imported Nippon Steel 27ZH100? Different grades of unit iron loss (such as W/kg@1.7T/50Hz) directly affects efficiency and temperature rise.
Winding conductor: Is it oxygen-free copper (OFC) or electrolytic copper? The copper purity (such as ≥99.99%) and the heat resistance grade of the insulating varnish (such as 180-grade polyimide varnished wire) need to be confirmed in writing.
Insulation system: Clearly define the overall insulation grade (such as F class (155℃) or H class (180℃)), and specify the main insulation materials, such as DMD (polyester film + non-woven fabric) for interlayer insulation or Nomex (DuPont paper) for insulation.

3. Specification of Environment and Structure:

High Altitude: The altitude correction factor must be clearly specified in writing. For example, "Used at an altitude of 2000 meters. The temperature rise limit is reduced by 5K according to national standards, and the insulation distance is increased by 15%."
Protection and Corrosion Prevention: The protection level IP code must be clearly specified, such as IP23 (resistant to rain) or IP45 (resistant to dust and splashing water). In coastal areas or chemical plants, the corrosion prevention process must be clearly defined, for example, "The outer surface of the oil tank uses an epoxy zinc-rich primer (80μm) + epoxy iron oxide intermediate paint (100μm) + acrylic polyurethane topcoat (80μm) system".
Cooling method: Clearly specify whether it is AN (natural air cooling) or AF (forced air cooling). If it is AF, the brand of the fan, the protection level (such as IP55), and the start-stop control logic must be specified.

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