EN
Oil-immersed Distribution Transformers
Oil-immersed Distribution Transformers provide step-down distribution for utility, industrial and commercial networks. Capacity, secondary voltage, vector group, tap range, losses, cooling and accessories are selected to suit the specified loading and local grid requirements.
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RATED VOLTAGE |
RATED CAPACITY |
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STANDARDS BASIS |
TYPICAL APPLICATION |
- Overview
- Recommended Products
General Product Overview :
Our oil-immersed distribution transformers are the primary choice for power distribution in utility grids, industrial plants, and commercial complexes. These transformers utilize high-grade insulating mineral oil as both a cooling medium and an excellent dielectric barrier. Featuring a hermetically sealed tank design, these units are protected from oxygen and moisture ingress, ensuring stable performance and a long service life of 30+ years with minimal maintenance. Their robust construction is engineered to withstand high electrical and mechanical stresses, making them ideal for heavy-duty outdoor installations.
Main Technical Specifications:
Item |
Specification |
Rated Capacity |
10kVA - 5000kVA |
Rated Voltage |
Up to 35kV (Customizable) |
Frequency |
50Hz / 60Hz |
Basic Impulse Level (BIL) |
75kV / 95kV / 125kV / 170kV (Based on System Voltage) |
Vector Group |
Dyn11, Yyn0, Yd11 (Customizable upon request) |
Tapping Range |
±5%, ±2x2.5% (Off-load or On-load) |
Cooling Type |
ONAN (Oil Natural Air Natural) / ONAF (Oil Natural Air Forced) |
Short-circuit Impedance |
4% - 8% (Standardized) according to IEC 60076-5 |
Noise Level (dB) |
45dB - 62dB (Low-noise design for residential areas) |
Standards Compliance |
IEC 60076, ANSI/IEEE C57.12, DOE 2016 / EU ECODesign Tier 2 |
Core Technology: Silicon Steel vs. Amorphous Alloy
- Traditional choice with high cost-effectiveness and stable performance.
- Ideal for standard industrial and commercial installations.
- Ultra-low loss technology reduces no-load losses by up to 80%.
- Recommended for green energy projects, rural grids, and locations with low average load factors where massive energy savings are needed.
Main Applications：
✅Industrial Parks & Factories
✅Residential Suburban Power Supply
✅Renewable Energy Step-up
