HENGFENGYOU TRANSFORMER|ANSI/IEEE STANDARD TRANSFORMER
HENGFENGYOU TRANSFORMER|ANSI/IEEE STANDARD TRANSFORMER
Hengfengyou 12.47kV US standard three-phase dry-type distribution transformer is a safe, energy-saving, eco-friendly and maintenance-free power distribution product fully compliant with American power industry norms. It is widely adopted in North American municipal power grids, large industrial parks, commercial complexes, high-rise buildings, data centers and various high-standard indoor power supply occasions.
Featured with low power loss, ultra-low noise, excellent flame retardancy and zero pollution, all performance parameters surpass ANSI and IEEE standard requirements. It owns F1-class fire resistance, high lightning impulse withstand voltage up to 95kV, and can run steadily at 120% rated load with forced air cooling. Equipped with complete intelligent temperature monitoring and protection system, the transformer ensures superior operational reliability and long service lifespan.
Our 12.47kV US standard dry-type transformers have been exported to over 50 countries and regions, mainly serving North America, Latin America and Oceania markets, and have gained wide recognition in global American-standard power distribution systems.
12.47kV urban distribution network construction & renovation in North America
Indoor power supply for commercial buildings, hospitals, schools and data centers
Power distribution for US-standard industrial enterprises, factories and municipal infrastructure
High-rise buildings, underground substations, crowded public venues and fire-sensitive areas
ANSI C57.12.01 / ANSI C57.12.22
IEEE C57.110 / IEEE C57.12.90
IEC 60076 Series
GB 1094 Series
Low loss & energy saving: Adopts US-standard optimized electromagnetic design, cuts down no-load and load loss remarkably, achieves prominent energy-saving effect and meets North American high energy efficiency criteria.
Ultra-low noise: Low-vibration core and integrated winding structure enable quiet operation, conforming to local noise control regulations for residential and business zones.
Flame retardant & high safety: F1-level fireproof performance, self-extinguishing, halogen-free, smokeless and non-toxic, free of fire and explosion hazards, fully satisfying US building fire safety codes.
Strong impulse resistance: 12.47kV grade lightning impulse withstand voltage reaches 95kV, outstanding lightning protection and anti-surge capacity to adapt to complex grid operating conditions.
Powerful overload capability: Supports stable operation at 120% rated load under forced air cooling mode, strong load adaptability to cope with peak power demand.
Intelligent temperature control: Built-in temperature monitoring, automatic fan drive and overtemperature alarm & trip protection system.
Durable customizable enclosure: Optional aluminum alloy, cold-rolled steel and stainless steel shells; protection grade IP20 / IP23 available.
Maintenance-free design: Integral cast resin structure, moisture-proof, dust-proof and corrosion-resistant, suitable for various harsh operating environments.
HV winding: Copper strip winding, high vacuum integral casting, exclusive patented flame-retardant epoxy formula meeting US environmental requirements
LV winding: Copper foil winding, thermosetting epoxy prepreg insulation, superior short-circuit impact resistance
Good overall integrity, low partial discharge and high mechanical strength
High-grade imported cold-rolled grain-oriented silicon steel sheet
Ladder lap joint & multi-step staggered stacking design
Special mineral oxide insulating coating, realizing lower no-load loss and quieter running
Natural air cooling (AN) / Forced air cooling (AF) dual modes
Real-time three-phase winding temperature monitoring
Automatic fan start-stop, overtemperature alarm and emergency trip protection
Stable performance for long-term uninterrupted operation
Material: Aluminum alloy, cold-rolled steel, stainless steel for selection
Protection Class: IP20 (touch-proof), IP23 (rain-proof)
Reasonable ventilation layout, elegant appearance, easy installation and inspection
Compact structure with small floor space, ideal for indoor power rooms, basement and narrow electrical areas
Oil-free design without flammable medium, no extra fire protection facilities required
Low noise design allows installation close to load center to reduce line loss
Matches American standard installation foundation, simple construction and low project cost
Keep installation site dry, well-ventilated and free of corrosive gas
Reserve sufficient safety insulation distance and heat dissipation space
Firm and level foundation installation to prevent vibration and deformation
Standard American-spec cable connection, reliable grounding (grounding resistance ≤ 4Ω)
Full set of intelligent temperature monitoring and control system
Overcurrent, overload and overtemperature multi-protection
Built-in surge arrester for overvoltage and lightning protection
Compatible with traditional and intelligent US power distribution systems
Winding DC resistance test
Voltage ratio, polarity and vector group inspection
Insulation resistance test
No-load loss & load loss test
Temperature control system function full verification
Totally oil-free dry-type structure, nearly maintenance-free
Regular routine check: appearance, operating temperature, connecting parts and running noise
Periodic dust cleaning to guarantee heat dissipation efficiency
Support remote monitoring to realize intelligent operation management
Long design service life under standard working conditions
Strong environmental adaptability against damp, dust and salt fog
Perfect for high-rise buildings, enclosed indoor spaces and fire-sensitive core areas
| Item | Core Content | Recommended Scheme/Standard |
|---|---|---|
| Type | 12.47kV three-phase dry-type distribution transformer | Cast resin, full copper winding, US standard |
| Standards | American mainstream power industry standards | ANSI C57.12 series, IEEE C57 series, compatible with IEC & GB |
| Performance | Low loss, low noise, high energy efficiency | Exceeds ANSI/IEEE specified performance index |
| Fire Class | F1 flame retardant, non-toxic, smokeless self-extinguishing | Preferred for indoor construction per US fire codes |
| Lightning Impulse | 12.47kV level: 95kV | Excellent lightning and surge resistance |
| Cooling Mode | AN / AF dual cooling | AF mode supports 120% rated load operation |
| Enclosure | Aluminum alloy / cold-rolled steel / stainless steel | IP20 / IP23 optional, customizable |
| Application | US-standard 12.47kV grid, industrial & civil power distribution | Fire-safe, maintenance-free high-reliability power solution |
Hengfengyou 12.47kV US standard three-phase dry-type distribution transformer integrates high safety, high efficiency, low noise, environmental friendliness and maintenance-free merits. Backed by 30 years of professional manufacturing experience and abundant overseas US-standard project experience, it adopts advanced vacuum casting technology, high-performance low-loss core and intelligent temperature protection system. Its overall performance fully complies with ANSI and IEEE standards, perfectly satisfying power distribution demands of modern North American urban power grids, industrial production and civil construction projects.
This product line has been exported to more than 50 countries, widely popular and highly praised in North America, Latin America and other American-standard markets. We provide global clients with safe, reliable, energy-saving and long-life professional power distribution solutions for all kinds of indoor enclosed spaces and fire-precaution scenarios.
Q1: What is a 12.47kV US standard dry-type distribution transformer?
A: It is ANSI/IEEE certified cast-resin oil-free flame-retardant transformer specially designed for 12.47kV American-standard power grid, widely used in indoor buildings, industrial facilities and fire control priority areas in North America.
Q2: What advantages does 12.47kV US standard dry-type transformer have over oil immersed transformer?
A: It is fire-resistant, non-toxic, oil-free with zero explosion risk, low noise and maintenance-free, fully meeting strict American power and building safety regulations, being the best choice for urban indoor and industrial power supply.
Q3: What fire rating can it reach?
A: It reaches F1 fire resistance grade, self-extinguishing, halogen-free, smokeless and non-toxic, in line with US NFPA fire protection specifications.
Q4: What is its lightning impulse withstand level?
A: The 12.47kV model features 95kV lightning impulse withstand voltage, with strong lightning protection and overvoltage suppression ability.
Q5: Is overload operation available?
A: Yes. With forced air cooling system, it can operate stably at 120% rated load for long term.
Q6: What protection grades are optional?
A: IP20 indoor touch-proof type and IP23 rain-proof type are available, and shell materials can be customized as required.
Q7: Does it need frequent daily maintenance?
A: Basically maintenance-free. Only regular appearance inspection, temperature checking and dust cleaning are needed.
Q8: What application scenarios are suitable?
A: North American 12.47kV distribution network, commercial buildings, hospitals, data centers, high-rise buildings and various US-standard industrial plants.
Q9: Which standards does it comply with?
A: Strictly conforms to ANSI C57.12.01, ANSI C57.12.22, IEEE C57 series core American standards, also compatible with IEC and GB standards, satisfying overseas market access and project bidding requirements.
