Delivered in parts, assembled on site.
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.
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basic information
The on-site assembly of transformers varies depending on the conditions specific to each customer, such as the workspace in the electrical room and the width and height of the route for transportation. At Rishou Industry, we have a track record of responding to such needs with special designs that adjust the size of the transformer to fit the transportation route and installation location, and further assemble it efficiently on-site after transporting parts like the core and coils. In the case presented in this article, we also faced the issue of weight restrictions for the materials transport elevator. When assembled, the core exceeded the weight limit. Therefore, we transported the parts that make up the core (electrical steel sheets) and then assembled the core on-site.
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Applications/Examples of results
If there are restrictions on the delivery route for the addition or update of the transformer, please consult with us.
Detailed information
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Molded coils delivered as parts. They are sturdy coils insulated with glass fiber reinforced epoxy resin.
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Electromagnetic steel sheets that make up the iron core. Considering the weight limit of the elevator, these were delivered in several batches.
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The iron core was assembled on-site. Since the finished product weighs about 2 tons, it exceeds the elevator's weight limit. Therefore, several hundred sheets of electrical steel were brought in in several batches, and then assembled on-site into the "stacked iron core."
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The state of having temporarily removed the upper iron core (yoke) to insert the coil.
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Cross-section of the iron core. To reduce "iron loss," it is a "stacked iron core" made of multiple thin steel plates layered together instead of a thick solid rod. It was assembled on-site.
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Carefully insert the coil.
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The coil is set with quite strict clearance.
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One set consists of a primary coil and a secondary coil. A total of six coils were set up on site.
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The 23kV special high-voltage, 1500kVA molded transformer has been assembled on-site and set in the designated location.
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Company information
The fundamental technologies of our company are Laminating Technology and Casting Technology. We are deeply exploring these two technologies and advancing diversification. In the case of general-purpose products, we continue our self-help efforts, such as pursuing thorough rationalization to become a last-one company.
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