利昌工業 List of Products and Services

It is a disaster-resistant and environmentally friendly capacitor.

The transformers installed in wind power generation systems are exposed to changes in current and voltage far more frequently than those installed in general power distribution equipment, and the extent of these changes is also significantly greater. Furthermore, they are often installed in mountainous areas, coastal regions, or offshore, operating under the influence of wind, rain, temperature changes, humidity, and salt air. With Rishokycast molded transformers, we can address these issues faced by transformers used in wind power generation. The photo shows a 2300 kVA self-cooling step-up transformer installed inside the tower of a floating offshore wind turbine.

Once upon a time, there was a comedy routine that asked, "Where do you bring in the subway trains?" However, there are often cases where the delivery route is blocked when adding or replacing transformers in the electrical room. When the electrical room is underground, issues such as weight limits on the delivery elevator can also arise. In such cases, Rishou Kogyo can respond by delivering the transformer in parts, such as the "core" and "coil," and then assembling it on-site. This is made possible by the Rishoucast transformer, which features a robust molded coil reinforced with fiberglass instead of using insulating oil. Here is one example of this.

The winding is reinforced with glass fiber, and after setting it in a mold, it is produced using the "mold method vacuum impregnation method," where epoxy resin is impregnated while "vacuuming." The epoxy resin is endowed with self-extinguishing properties, so there is no concern about combustion, secondary fires, or explosions. The epoxy resin is a low-viscosity type that does not contain fillers such as silica. Therefore, the resin penetrates even into the interior of the winding. Due to the vacuuming process, no air bubbles enter the resin, making it a highly reliable insulation method with no concern for partial discharge (corona) that could arise from this. The winding has a monolithic molded structure, making it resistant to moisture and preventing moisture absorption. The glass fiber-reinforced winding has excellent mechanical strength, allowing it to withstand stress during voltage switching. It can be made smaller and lighter than oil-insulated transformers, and maintenance inspections are also easy. *For more details, please download the catalog or contact us directly.*

This is a distribution transformer with excellent energy-saving performance that significantly reduces "no-load loss," which corresponds to standby power. The capacity of the transformer is determined based on the peak power consumption expected at the facility. Therefore, there can be a significant deviation from this capacity during nighttime, holidays, or certain seasons. In particular, in office buildings, the average load factor of the transformer, which is the ratio of average power to maximum power, is estimated to be around 30 percent, indicating that the time periods when standby power is at its maximum likely account for a considerable proportion. Thus, if you replace the 30-year-old transformer that has reached its renewal period with a Risho amorphous molded transformer, you can achieve a 50 percent energy saving and an annual reduction of 8 tons of carbon dioxide.

We have a lot of delivery experience in accident current measures for facilities that generate electricity using renewable energy sources such as solar power, wind power, biomass, and small hydropower.

It is designed to handle harmonic currents emitted by thyristors and inrush currents associated with repeated power supply activation.