2400V/480V 300kVA Three Phase Pad Mounted Transformer - Low Noise for Residential
Product Overview
Leilang Electric 300kVA 2400V to 480Y/277V three phase pad mounted transformer is purpose-built for residential communities, urban neighborhoods, and quiet-required commercial areas. This model features a precision-engineered low-noise structure that delivers ultra-quiet operation, making it ideal for installation close to homes and public spaces. With stable 2400V primary to 480V secondary conversion, fully sealed oil-immersed design, and compliance with North American ANSI/IEEE/UL standards, it provides safe, reliable, and neighborhood-friendly power distribution. Engineered for long service life and minimal maintenance, it combines professional voltage conversion with ultra-low noise performance to perfectly balance power supply quality and living environment comfort.

Key Features & Benefits
- Ultra-Low Noise – Ideal for Residential Areas
- Optimized core & winding structure to reduce vibration noise
- Quiet operation suitable for residential, parks, schools, and communities
- No disturbance to daily life, meeting strict neighborhood noise requirements
- Stable 2400V to 480Y/277V Voltage Conversion
- Professional 2400V primary / 480Y/277V secondary configuration
- Dyn1 vector group ensures stable output & neutral point stability
- Strong adaptability to unbalanced loads, no voltage drift
- High Efficiency 99.0% – DOE 2016 Compliant
- Up to 99.0% efficiency with low no-load & load loss
- Meets DOE 2016 energy-saving standards
- Reduces power waste & long-term operating costs
- UL / ANSI / IEEE Certified Quality
- UL/cUL listed for North American market access
- Full compliance with ANSI C57.12.34 and IEEE standards
- Copper windings & high-quality silicon steel core
- 65°C temperature rise, ONAN self-cooled system
- Fully Sealed & Outdoor Durable
- Hermetically sealed oil tank to prevent moisture & oxidation
- Corrosion-resistant coated steel housing
- All-weather outdoor design, no need for extra fencing
- Built-in pressure relief valve & safety protection
Technical Specifications
| Item |
Value |
| Brand |
Leilang Electric |
| Type |
Three Phase Pad Mounted Transformer |
| Rated Capacity |
300 kVA |
| Primary Voltage |
2400V |
| Secondary Voltage |
480Y/277V |
| Frequency |
60 Hz |
| Vector Group |
Dyn1 |
| Efficiency |
99.0% |
| Cooling |
ONAN (Self-Cooled) |
| Temperature Rise |
65°C |
| No-Load Loss |
480 W |
| Load Loss |
3650 W |
| Winding Material |
Copper |
| Core |
Grain-Oriented Silicon Steel |
| Insulation Oil |
Mineral Oil (Non-PCB) |
| Feed Type |
Loop / Radial Feed |
| HV BIL |
95 kV |
| LV BIL |
30 kV |
| Certifications |
UL/cUL, ANSI C57, IEEE, DOE 2016, CE, ISO |
| Warranty |
24 Months from B/L Date |
| MOQ |
1 Unit |
| Lead Time |
15–25 days |
Applications
- Residential communities & urban neighborhoods
- Commercial buildings near living areas
- Schools, hospitals, parks, and public facilities
- Small industrial & light commercial power supply
- Underground power distribution networks
- Renewable energy & energy storage systems
Frequently Asked Questions
Q: Is this 300kVA transformer really low noise and suitable for residential areas?
A: Yes. Leilang Electric 300kVA pad mounted transformer uses low-vibration core and optimized structure for ultra-quiet operation, making it perfect for residential communities and noise-sensitive areas.
Q: What is the voltage ratio of this transformer?
A: It is professionally designed as 2400V primary to 480Y/277V secondary, widely used in North American distribution systems.
Q: Is this transformer certified for use in North America?
A: Yes. It is UL/cUL listed and fully compliant with ANSI C57 and IEEE standards, legal for installation in the US and Canada.
Q: What is the efficiency level?
A: This model reaches 99.0% efficiency and meets DOE 2016 energy efficiency requirements, saving energy and reducing operating costs.
Q: Can it be installed outdoors without a fence?
A: Yes. It features a fully sealed, fully insulated, grounded metal enclosure that meets outdoor safety standards; generally no extra fence is required.
Q: Can you accept 1-unit sample orders?
A: Yes, our MOQ is 1 unit for standard models, supporting sample testing and small projects.
Q: Is customization available?
A: Yes, we support OEM/ODM including voltage ratio, color, logo, tap changer, and monitoring functions.