Quality Three-Phase Voltage Regulator Supplier

Yibaling is a manufacturer and supplier of three-phase voltage regulators based in China. We operate our own factory and offer OEM services. In addition to our voltage regulator series, transformer-related products are another key area of expertise for us; if you require a comprehensive electrical system solution, please contact us to discuss your specific needs.

What is a three-phase voltage regulator?

A three-phase voltage regulator is simply a combined handle that can synchronously adjust the three-phase voltage.
Its core design involves combining the coils and carbon brushes of three single-phase voltage regulators and achieving mechanical linkage through a main shaft or a set of gears.
When you rotate the handwheel (or the motor drive), the three carbon brushes will slide synchronously on their respective coils.
This is similar to simultaneously turning three connected faucets, allowing the three-phase voltage to increase or decrease proportionally and continuously, and maintaining balance - this is crucial for loads such as three-phase motors, as it can prevent overheating or vibration caused by unbalanced voltage.
It still outputs a pure sine wave. It has strong load-carrying capacity, and is therefore commonly used in industry for the soft start and speed control of three-phase motors, or to provide adjustable test voltages for production line equipment. Essentially, it is designed to meet the core requirement of industrial power equipment for synchronous adjustable and balanced voltage.

How does a three-phase voltage regulator work?

The working principle of a three-phase transformer is that it synchronously completes the voltage transformation of three-phase alternating current through a shared three-column iron core magnetic circuit.
When three-phase alternating currents that differ by 120° are fed into the three windings on the high-voltage side, alternating magnetic fluxes will be generated in each iron core column. These magnetic fluxes will follow the iron core to form a complete loop and also pass through the low-voltage coil on the same iron core column.
According to the law of electromagnetic induction, as the magnetic flux changes, an induced voltage will be "generated" in each coil. And for each phase, the ratio of the voltages on the high-voltage and low-voltage sides is completely determined by the number of turns in their coils, which is very strict.
This three-in-one design uses less material and is more cost-effective than assembling three single-phase transformers. By connecting the coils in different ways such as star (Y) or triangle (D), it can flexibly adapt to various voltage and phase requirements.
Therefore, it has become the main equipment in the power grid - it is used to boost the voltage and transmit it over long distances in power plants, and then used to reduce the voltage and distribute it in households.

Compare with single-phase voltage regulator

How to carry out OEM customization？

As a factory that has been operating in the pressure regulator industry for many years, we are well aware that the conditions at the customer's site vary greatly. A standard pressure regulator often fails to precisely match the actual requirements. Therefore, we have made tailoring our products our core service. The process is solid, and the materials used are never of low quality.

Step 1: Understand the requirements

Our technical team will sit down one-on-one with you and clarify every detail: what capacity is needed (from a few KVA to several thousand KVA), how much voltage fluctuation is expected in the input, how precisely and stably the output should be (to what voltage), and what response speed is required, etc. The more detailed this discussion is, the more suitable the final product will be.

Step 2: Develop the plan and finalize it

Once the customer's requirements are clear, our engineers at Baoling will provide you with an exclusive customized plan. It will clearly inform you which structure is more suitable for the machine's internal components (such as traditional contact-type regulators or more suitable induction-type ones), what configuration of core components to use, what performance parameters can be achieved, approximately how long it will take to produce, and detailed quotations. We repeatedly confirm with you until there are no doubts about every detail, and then sign the contract and pay the deposit. The project will officially start.

Step 3: Order based on the plan and use high-quality materials

Once the plan is determined, we start purchasing raw materials:
Core material: We use high-grade oriented silicon steel sheets such as 30QG120 from Wuhan Steel or 27ZH100 from Shin Nippon Steel, with a thickness of about 0.27 millimeters, to minimize no-load loss and operating noise.
Winding: The main winding uses T2 copper wire or round copper wire drawn from non-ferrous copper, with a copper purity of over 99.95%, ensuring good conductivity and less heat generation; the lead part uses multi-strand copper core flexible cables, durable and safe.
Insulation: Inter-turn insulation uses 0.08mm thick DMD insulation paper, inter-layer with epoxy glass cloth boards, and the internal shell is sprayed with H-class insulation paint (with a temperature resistance of over 180°C), ensuring excellent insulation performance.
Contact: If it is a contact-type regulator, the core regulating contact we use is silver-graphite alloy (with a silver content of no less than 30%), which is wear-resistant and conductive, especially suitable for occasions requiring frequent regulation.
Shell: For those installed indoors, we use Q235 cold-rolled steel plates; for those in outdoor environments exposed to sunlight and rain, we directly upgrade to 304 stainless steel plates, with a thickness of no less than 2 millimeters, ensuring both corrosion resistance and no deformation.
In simple terms, our customization starts from your requirements, using a solid process and real materials to ultimately produce a high-quality pressure regulator.

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