Single Phase Oil Immersed Power Distribution Transformer1250kVA/20kV
Rated voltage
20kV
Rated frequency
50/60Hz
Rated capacity
1250kVA
Series
D
Description
The Rockwill single-phase oil-immersed distribution transformer is engineered to deliver reliable power conversion for utility, commercial, and residential applications. Combining robust construction with advanced electrical design, it ensures stable voltage regulation and efficient energy distribution. Available in both pole-mounted and pad-mounted configurations.
Product Showcase Video
Key Features
Oil-immersed construction： Mineral oil provides insulation and cooling for dependable outdoor operation with minimal maintenance
Single-phase design： Compact core and coil assembly reduces weight and installation footprint compared to three-phase equivalents
Flexible mounting： Configurable for pole-mount or pad-mount installation to suit diverse distribution network layouts
Stable voltage regulation： Off-circuit tap changer allows field adjustment to match local line conditions
Robust enclosure： Fully sealed, weatherproof tank prevents oil leakage and moisture ingress
Technical Parameters
Parameter
Value
Phase
Single-phase
Rated capacity
1250 kVA
Frequency
50 / 60 Hz
Primary voltage
20 kV
Secondary voltage
As specified
Insulation level (IEC)
24 / 50 / 125 kV (Um / PF / LI)
Tapping range
±2 × 2.5 % (off-circuit)
Winding material
Copper / Aluminum (optional)
Cooling method
ONAN (Oil Natural Air Natural)
Insulation medium
Mineral oil
Standards
IEC 60076, ANSI / IEEE (as specified)
Applications
Single-phase distribution in utility power networks
Commercial and industrial facilities requiring single-phase supply
Rural and suburban power distribution
Step-down transformation for residential communities
Custom voltage ratings, tapping arrangements, impedance values, and mounting configurations are available on request. Contact Rockwill for application-specific design and quotation.
Single-Phase Distribution Transformers: The Key to Flexible and Efficient Deployment of EV Charging InfrastructureAmid the rapid deployment of EV charging infrastructure, overcoming grid limitations and achieving cost-effective flexible layouts has become critical. Traditional three-phase power supply solutions often face challenges like lengthy installation cycles and extensive modifications, particularly struggling in imbalanced distributed scenarios. Single-phase distribution transformers are
Main Categories: Medium and High Voltage Switchgear/Power and Distribution Transformers/Instrument Transformers and Sensors/Lightning Protection and Electrical Insulation/Substations and E-Houses/Electrical Panel and Controlgear
Whole-life care management services for equipment procurement, use, maintenance, and after-sales, ensuring safe operation of electrical equipment, continuous control, and worry-free electricity consumption.
The equipment supplier has passed platform qualification certification and technical evaluation, ensuring compliance, professionalism, and reliability from the source.
Use the IEE-Business app to find equipment, obtain solutions, connect with experts, and participate in industry collaboration anytime, anywhere—fully supporting the development of your power projects and business.
Login
