Crafted with innovation, built with precision-Resin Cast Dry Type Transformer, powering safety and performance!
01 General
1.1 Project Description
SCOTECH’s cast coil transformers are meticulously designed, constructed, and tested to comply with the highest industry standards, including NEMA, ANSI C.57, DOE, and IEEE, as applicable.
SCOTECH’s cast coil dry type transformers are designed for both indoor and outdoor use, requiring minimal maintenance thanks to their robust construction. Utilizing environmentally friendly insulation systems, they eliminate the need for fireproof vaults and catch basins that traditional liquid-filled transformers typically require. This capability facilitates the installation of cast coil transformers in proximity to the load, enhancing overall system stability and minimizing costly secondary line losses. Additionally, their fiberglass-reinforced design offers superior short-circuit and impulse voltage strength. t boasts excellent mechanical characteristics, is devoid of cracks and internal air bubbles, and features low local discharge, ensuring high reliability and an extended service life.
1.2 Technical Specification
630 kVA resin cast dry type transformer specification and data sheet
| Delivered to | Georgia |
| Year | 2024 |
| Type | Resin cast dry type transformer |
| Core material | Grain oriented silicon steel sheet |
| Standard | IEC60076-11、EN50541-1、 ISO9001、ISO14001 |
| Rated Power | 630KVA |
| Frequency | 50HZ |
| Phase | Three |
| Vector group | Dyn11 |
| Cooling Type | ONAN |
| Primary Voltage | 10 kV |
| Secondary Voltage | 0.4 kV |
| Winding Material | Aluminum |
| Impedance | 6% |
| Tap Changer | NLTC |
| Tapping Range | ±2*2.5%@primary voltage |
| No Load Loss | 1.13KW |
| On Load Loss | 5.6KW |
| Insulation level | F |
1.3 Drawings
630 kVA resin cast dry type transformer diagram drawing and size.
02 Manufacturing
2.1 Core
| The transformer’s magnetic core is crafted from premium low-loss, grain-oriented steel sheets, featuring 45-degree step-lap joints that effectively reduce stray flux losses. To enhance durability, the surface of the magnetic core is treated with a specialized coating that protects it from oxidation and corrosion, while also minimizing operational noise. This combination of advanced materials and innovative design ensures optimal performance and longevity in various applications. |  |
2.2 Winding
 | The cast windings are constructed with multiple layers, each consisting of a single turn, which enhances impulse voltage resistance and minimizes the risk of partial discharge. Typically made from aluminum tape, this design significantly reduces mechanical stresses arising from temperature fluctuations in the transformer. The low voltage windings utilize a continuous foil of either aluminum or copper, which provides robust resistance to short-circuit stress due to the exceptionally low dielectric stresses involved. This innovative winding configuration not only improves reliability but also ensures optimal performance across a variety of operating conditions. |
2.3 Final Assembly
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03 Testing
| No. | Test Item | Unit | Acceptance Values | Measured Values | Conclusion | |
| 1 | Measurement of winding resistance | / | Maximum resistance unbalance rate Line resistance:≤2% | HV (line) | LV (line) | Pass |
| 0.28% | 1.02% | |||||
| 2 | Measurement of voltage ratio and check of phase displacement | / | The tolerance of voltage ratio on the principal tapping: ±1/10 Connection symbol: Dyn11 | -0.07% ~ 0.12% Dyn11 | Pass | |
| 3 | Measurement of Short-circuit Impedance and Load Loss | / kW kW | t:120℃ Z%: measured value Pk: measured value Pt: measured value | 6.01% 4.181 5.765 | Pass | |
| 4 | Measurement of No-load Loss and Current at 90% and 110% of rated voltage | / kW | I0 : provide measured value P0: provide measured value | 90% Ur | 0.261 0.9018 | Pass |
| 100% Ur | 0.29 1.002 | |||||
| 110% Ur | 0.319 1.102 | |||||
| 5 | Applied Voltage Test | / | HV: 28kV 60s LV: 3kV 60s | No collapse of the test voltage occurs | Pass | |
| 6 | Induced Voltage Withstand Test | / | Applied voltage (kV):2 Ur Induced voltage (kV): 0.8 Duration(s):40 Frequency (HZ): 150 | No collapse of the test voltage occurs | Pass | |
| 7 | Partial Discharge Test | pC | The maximum level of partial discharges shall be 10 pC | ＜10 | Pass | |
04 Packing and Shipping
05 Site And Summary
In summary, resin cast dry type transformers, with their excellent safety features, efficient energy conversion, outstanding environmental characteristics, and convenient maintenance, have become highly favored electrical equipment in commercial and industrial fields. Whether in urban power grids, industrial parks, high-rise buildings, or metro systems, resin cast dry type transformers consistently provide reliable and stable power support. Choosing high-quality resin cast dry type transformers is not only a guarantee for enterprise production efficiency but also a positive contribution to green and sustainable development. We are committed to offering you the highest quality products and professional services, and we look forward to cooperating with you to drive industry progress.
