Product Details

Place of Origin	CHINA	Phase	Single Phase
Packaging Details	Plywood case	Secondary Voltage	480V
Model Number	D11-333/14.4-7.2	Supply Ability	5000set/month
Certification	CE,ISO	Brand Name	WINLEY
Payment Terms	T/T	Type	Overhead Distribution Transformer
Price	$1000-$10000	Delivery Time	30days
Capacity	333 kVA	Minimum Order Quantity	1unit
Cooling Class	ONAN	Winding Material	Copper
Efficiency Standard(s)	Meets DOE 2016 ANSI IEEE Standards	Primary Voltage	24940GrdY/14400V & 12470GrdY/7200V

333kVA Overhead Distribution Transformer Single Phase 14.4-7.2kV to 480V for North American Power Systems

Why Choose Us

True Manufacturer — Independently produce silicon steel cores, oil tanks & complete transformers. Not an assembler.
Laser-Scribed Silicon Steel Core — Proprietary technology for lower core losses and higher efficiency.
UL/cUL Certified — Pole-mounted & pad-mounted transformers listed. Meets ANSI, IEEE, CSA C802.1, DOE.
Fast Delivery — 600+ units/month, standard products in 7–35 days.
18 Years, 60+ Countries — Proven reliability from Canadian winters to tropical climates.
Full Certifications — ISO 9001 | ISO 14001 | ISO 45001 | UL/cUL | CE | TUV

Product Photo

Main Data

Transformer Type	Overhead Distribution Transformer, Conventional Type
Phase	Single Phase
Capacity	333 KVA
Primary Voltage	24940GrdY/14400V & 12470GrdY/7200V
Secondary Voltage	480V
Frequency	60 Hz
Temperature Rise	65°C
Insulation Rating	Class A
Cooling Class	ONAN
Impedance (@ 85°C)	4.61%
Efficiency Standard(s)	Meets DOE Standards, Meets CSA C802.1, Meets ANSI C57.12.20
Winding Material	Copper
Dimensions(H×D×W)	1700×1300×1900 mm
Total Weight (Liquid Filled)	1634kg
Efficiency	99.43%
No Load Loss	460 W
Full Load Loss (85°C))	2012.2 W

Technical drawings

Standard Features

333kVA High-Capacity Overhead Distribution
Single-phase pole-mounted design for 24940GrdY/14400V & 12470GrdY/7200V to 480V power conversion, ideal for residential, rural, and light commercial utility networks.
Full North American Compliance
Tested per ANSI C57.12.20, fully meets CSA C802.1 and DOE efficiency standards for utility-grade safety and performance validation.
Robust Liquid-Filled Construction
Conventional-type overhead design with ONAN self-cooling, built to withstand harsh outdoor weather and extreme temperature conditions.
Dual High Voltage Primary Design
Flexible dual voltage primary configuration (14.4kV/7.2kV) for versatile grid connection applications.
Premium Copper Windings
High-purity copper windings with grain-oriented steel core for low loss, high efficiency, and long-term operational reliability.
Pressure-Sealed Tank Technology
Advanced pressure-sealed tank design reduces maintenance requirements and extends service life.
Mineral Oil Insulation
Non-PCB mineral oil insulation for excellent thermal stability, fire resistance, and long service life in overhead environments.
Flexible Termination Design
Tin-plated primary and secondary terminals compatible with both copper and aluminum conductors, simplifying field installation.

Applications

Sector	Applications
Residential	Neighborhoods, housing developments, apartments
Agricultural	Farms, irrigation systems, rural electrification
Commercial	Retail stores, offices, community buildings
Utility	Distribution networks, street lighting, remote power
Infrastructure	Construction sites, temporary power

Specifications

Production Process