{"id":10744,"date":"2026-08-29T23:43:19","date_gmt":"2026-08-29T15:43:19","guid":{"rendered":"https:\/\/q8bbzjnpm5.wpdns.site\/?p=10744"},"modified":"2026-08-29T23:43:19","modified_gmt":"2026-08-29T15:43:19","slug":"jiangsu-subian-power-equipment-co-ltd-achieves-remarkable-progress-in-the-field-of-dry-type-transformers","status":"publish","type":"post","link":"https:\/\/subian-electric.com\/it\/news\/jiangsu-subian-power-equipment-co-ltd-achieves-remarkable-progress-in-the-field-of-dry-type-transformers\/","title":{"rendered":"Jiangsu Subian Power Equipment Co., Ltd. Raggiunge Progressi Notevoli nel Campo dei Trasformatori a Secco"},"content":{"rendered":"

In the winter season of 2024, a distribution utility in Southeast Asia conducted replacement of a fire-damaged oil-immersed transformer inside a small urban substation by a dry-type transformer of 1,000 kVA that was manufactured by the supplier that had been vetted by the utility for a period extending two years in a silent manner. A remarkable thing is that the commissioning of the new transformer took only four days, while keeping its 100 degrees C temperature rise under 78 degrees K during 8 hours of the load run. The necessary documentation in the form of IEC 60076-11 type test report, routine test certificates and data on winding-resistance for every tap was also shipped along with the transformer. The supplier of the transformer was Jiangsu Subian Power, a name that has already been well-known in the dry-type transformer market for many years.<\/p>\n

The article intends to analyze the progress achieved by Jiangsu Subian Electric Power in dry-type transformer segment: the engineering milestones, its current product lines, testing and quality infrastructure behind its claims and market signals indicating its transformation from simply a regional player to a serious export supplier. In case you are considering on selecting a Chinese dry-type transformer manufacturer, you can use this article as a practical guide to what should be considered as \u201cremarkable progress\u201d in many fields, including test reports, specifications and performance in terms of delivery services.<\/p>\n

In short, Jiangsu Subian Electric Power Co., Ltd. is a Chinese manufacturer of transformers, and it provides an extensive range of dry-type transformers from 30 kVA to 10,000 kVA with 10 kV\u201335 kV ratings with both cast resin insulation and VPI insulation at F (100 K) and H (125 K) insulation types according to IEC 60076-11. The manufacturer also supplies full test documentation \u2013 type test and routine test reports as well as the factory acceptance measurements to the export market in Asia, Africa, the Middle East, and Latin America.<\/p><\/blockquote>\n

\"Jiangsu<\/p>\n

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Background: A Transformer Manufacturer’s Path<\/h2>\n

Jiangsu Subian Electric Power Co., Ltd. is located in Jiangsu Province, China, which can be considered historically as one of the densest regions of transformer engineering in the country. The company began its activities with distribution transformers and gained success in oil-immersed units with voltage rates ranging from 10 kV to 110 kV. The shift to dry-type production became the next step; the demand for fireproof transformers made the dry-type market grow faster than that of oil-based products and many technical aspects of both production lines (e.g. core layout, winding technology, testing equipment etc.) are similar.<\/p>\n

There are four movement directions that prove the transformation from \u201coffering dry-type production\u201d to \u201cbeing a serious dry-type producer\u201d: production floor, testing capabilities, certification and exportations documents obtained. None of these can be faked with a brochure and all of these areas have developed in a noticeable way in the recent years.<\/p>\n

Key Milestones in the Dry-Type Journey<\/h2>\n\n\n\n\n\n\n\n\n\n\n
Milestone<\/th>\nWhat Changed<\/th>\nWhy It Matters to Buyers<\/th>\n<\/tr>\n<\/thead>\n
Rating expansion<\/td>\nRange grew from 30 kVA to 10,000 kVA<\/td>\nOne supplier for small and large projects<\/td>\n<\/tr>\n
Voltage class coverage<\/td>\n10 kV, 20 kV, 35 kV classes<\/td>\nMatches most global distribution networks<\/td>\n<\/tr>\n
Dual insulation technology<\/td>\nBoth cast-resin (SCB series) and VPI (SG series)<\/td>\nFlexible spec for fire-rated and budget projects<\/td>\n<\/tr>\n
IEC 60076-11 compliance<\/td>\nType tests for representative ratings<\/td>\nDocumented, defensible quality claims<\/td>\n<\/tr>\n
Export documentation system<\/td>\nStandardized test reports, drawings, and certificates<\/td>\nFaster project approval and commissioning<\/td>\n<\/tr>\n
High-efficiency cores<\/td>\nAmorphous alloy core dry-types added<\/td>\nMeets new loss regulations in many markets<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\"Key<\/p>\n

Dry-Type Product Line and Capability<\/h2>\n\n\n\n\n\n\n\n\n
Serie<\/th>\nIsolamento<\/th>\nGamma di Potenza<\/th>\nApplicazione Tipica<\/th>\n<\/tr>\n<\/thead>\n
SCB series (cast resin)<\/td>\nF class (100 K) \/ H class (125 K)<\/td>\n30\u20136,300 kVA<\/td>\nBuildings, hospitals, data centers<\/td>\n<\/tr>\n
SG series (VPI)<\/td>\nH class (125 K)<\/td>\n50\u201310,000 kVA<\/td>\nIndustrial plants, mining<\/td>\n<\/tr>\n
SC(B) amorphous core<\/td>\nF class<\/td>\n100\u20132,500 kVA<\/td>\nLow-loss, green-certified projects<\/td>\n<\/tr>\n
High-voltage dry-type<\/td>\nF\/H class<\/td>\nUp to 35 kV class<\/td>\nRenewables, urban substations<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

The measurement of progress is the system of ratings. The process of growing from productions of small cast resin units to 10,000 kVA VPI transformers calls for special vacuum casting and impregnation equipment with determined likes of floors, masterminds test beds for complete loading, and a winding shop that is able to produce a steady tension with precision tolerances. The mentioned successful production results, and not the catalogue, allow manufacturers to confidently quote large-scale products.<\/p>\n

Cast-Resin vs VPI: The Two Technologies Subian Builds<\/h2>\n

By knowing the two types of dry technologies, you can interpret any claims from any manufacturer, including Subian’s.<\/p>\n