Zhejiang Jiangshan Hengli Electrical Co., Ltd. is one of the leading manufacturers and suppliers of epoxy resin cast delta star dry type transformer in China. If you're going to wholesale durable epoxy resin cast delta star dry type transformer made in China, welcome to get pricelist from our factory. All customized products are with high quality and low price.
This 630kVA Epoxy Resin Cast Delta Star Dry Type Transformer is a premium delta-star configured indoor dry-type power distribution transformer. For voltage configuration, the primary rated voltage is 11kV, equipped with off-load no-load tap changer (NLTC) with tapping range of ±2×2.5%. The secondary rated voltage is 0.415kV, customized to meet special low-voltage power supply requirements for industrial special equipment, automation production lines and dedicated low-voltage distribution systems.
It is engineered with advanced vacuum epoxy resin casting technology for superior insulation, fire safety and reliable long-term operation. Different from oil immersed transformers, this Epoxy Resin Cast Delta Star Dry Type Transformer has no insulating oil inside, zero oil leakage risk, flame retardant and self-extinguishing, non-toxic and environmentally friendly. It will not cause fire pollution or environmental contamination even under extreme fault conditions.
Key Technical Parameters
| Rated Capacity | 630 kVA |
| Primary Voltage | 11 kV |
| Secondary Voltage | 0.415 kV |
| Tap Range | ±2×2.5% NLTC (Off-circuit Tap Changer) |
| Vector Group | Dyn11 |
| Cooling Method | AN / AF |
| Insulation Class | F / H optional |
| Frequency | 50Hz / 60Hz customizable |
| Installation Location | Indoor |
| Winding Material | copper/ aluminium |
| Feature | Low noise, low loss, fire retardant, anti-humid, explosion-proof |
Application Areas
This 630kVA Epoxy Resin Cast Delta Star Dry Type Transformer is widely applied for industrial factory power distribution, commercial building substations, municipal urban grid projects, data centers, hospital power supply, mining auxiliary power systems and fire-sensitive indoor installation sites where oil-free, high safety and eco-friendly operation are mandatory.
Product Structure & Design Highlights
The transformer adopts dual AN natural air cooling and AF forced air cooling system as standard configuration. Under AN natural cooling mode, the unit runs steadily at full 630kVA rated power for daily regular operation. When encountering peak power demand, heavy load surge or continuous high-load working conditions, switching to AF forced air cooling can enhance heat dissipation efficiency greatly and allow temporary overload operation, improving operational flexibility and adapting to fluctuating power consumption demands in complex working scenarios.
The off-circuit voltage regulation design allows staff to adjust input voltage ratio on site according to local grid voltage deviation, effectively compensate grid voltage fluctuation, stabilize secondary output voltage and guarantee stable and safe power supply for downstream electrical machinery, distribution cabinets and production equipment.
This 630kVA Epoxy Resin Cast Delta Star Dry Type Transformer adopts classic Dyn11 vector group connection design. Compared with traditional vector groups, Dyn11 structure owns lower zero-sequence impedance, stronger unbalanced load tolerance, outstanding harmonic suppression performance and smaller phase angle displacement. It can curb grid harmonic interference, reduce three-phase current imbalance, optimize power quality and protect sensitive electric devices from harmonic damage.
Windings are made of 99.99% high-purity oxygen-free copper conductors with tight winding structure. After vacuum epoxy resin integral casting and high-temperature curing treatment, the windings achieve excellent dielectric strength, waterproof, moistureproof, dustproof, anti-corrosion and chemical resistance.
Testing Services
Routine tests (Factory Test)of transformer
- Winding Resistance Measurement
- Ratio Test (Voltage Ratio Measurement)
- Transformer vector group test
- Short-Circuit Impedance & Load Loss Test
- No-Load Loss & No-Load Current Test
- Insulation Resistance Test
- Tests on-load tap-changer.
FAQ
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