HENGFENGYOU TRANSFORMER|ANSI/IEEE STANDARD TRANSFORMER
HENGFENGYOU TRANSFORMER|ANSI/IEEE STANDARD TRANSFORMER
Hengfengyou 34.5kV US standard three-phase dry-type distribution transformer is a high-grade high-voltage power distribution equipment that fully conforms to American power industry standards, featuring high safety, high efficiency, environmental friendliness and maintenance-free performance. It is widely applied in North American 34.5kV high-voltage power grids, large industrial bases, energy projects, commercial central zones, super high-rise buildings, large data centers and various high-standard indoor high-voltage power supply projects.
With features of extremely low loss, low noise, superior flame retardancy and zero pollution, all performance indicators exceed ANSI and IEEE standard requirements. It adopts F1 class fire-resistant structure, with lightning impulse withstand voltage up to 95kV. Equipped with forced air cooling system, it can operate stably under 120% rated load. Matched with complete intelligent temperature monitoring and comprehensive protection system, the product boasts outstanding operational stability and ultra-long service life.
Our 34.5kV US standard dry-type transformers have been exported to more than 50 countries and regions, focusing on supplying North America, Latin America and other high-voltage power markets, and have gained unanimous recognition and reliable reputation in global American-standard high-voltage power distribution fields.
34.5kV high-voltage power grid construction & upgrading in North America
Indoor high-voltage power supply for large commercial complexes, hospitals, campus parks and data centers
High-voltage power distribution for US-standard heavy industry, mineral enterprises and key municipal infrastructure
Indoor high-voltage substations, underground power hubs, large public facilities and fire-sensitive core areas
ANSI C57.12.01 / ANSI C57.12.22
IEEE C57.110 / IEEE C57.12.90
IEC 60076 Series
GB 1094 Series
Low Loss & High Energy Saving: Adopts exclusive high-voltage electromagnetic optimized design per US standards, effectively reducing no-load and load loss, delivering remarkable energy-saving effect and meeting North American high-voltage power energy efficiency specifications.
Ultra-low Noise Operation: Low-vibration core plus integrated winding structure ensures stable quiet operation, fully complying with local environmental noise control standards.
Flame Retardant & Ultimate Safety: Reaches F1 high-level fire resistance, self-extinguishing, halogen-free, smokeless and non-toxic. No oil leakage, fire or explosion risks, fully satisfying US high-standard building fire safety codes.
Superior High-voltage Impulse Resistance: 34.5kV grade lightning impulse withstand voltage reaches 95kV, with powerful lightning protection and overvoltage surge suppression capacity, adaptable to complex high-voltage grid operating conditions.
Strong Overload Bearing Capacity: Supports stable long-term operation at 120% rated load with forced air cooling, well coping with peak power demand of large-scale industrial loads.
Intelligent Temperature Control System: Built-in high-precision temperature detection, automatic fan control and multi-stage overtemperature alarm & trip protection function.
Durable Customizable Housing: Optional aluminum alloy, cold-rolled steel and stainless steel enclosures; IP20 / IP23 protection classes available for different installation environments.
Maintenance-free Structure: Integral high-strength cast resin insulation design, excellent moisture-proof, dust-proof and anti-corrosion performance, suitable for various harsh high-voltage working environments.
HV winding: High-quality copper strip winding, high vacuum overall casting, self-developed high-voltage flame-retardant epoxy formula meeting US environmental requirements
LV winding: High-precision copper foil winding, full thermosetting epoxy insulation, outstanding high-voltage short-circuit resistance
High overall structural rigidity, ultra-low partial discharge, excellent mechanical stability for high-voltage operation
High-grade imported high-performance grain-oriented silicon steel sheet
Optimized ladder lap joint and multi-stage step-lap stacking design
Special high-temperature resistant mineral oxide insulating coating, further lowering no-load loss and running noise
Natural Air Cooling (AN) / Forced Air Cooling (AF) dual modes
Real-time independent temperature monitoring for three-phase high-voltage windings
Automatic fan start-stop linkage, overtemperature early warning and emergency trip protection
Stable and reliable for long-term continuous high-load operation
Material: Aluminum alloy, cold-rolled steel, stainless steel optional
Protection Class: IP20 (indoor anti-touch), IP23 (semi-outdoor rainproof)
Reasonable high-voltage ventilation structure, neat appearance, easy installation, inspection and overhaul
Compact high-voltage optimized structure, small footprint, ideal for indoor high-voltage power rooms and basement enclosed power distribution spaces
100% oil-free dry-type design without flammable medium, no need for extra high-standard fire protection facilities
Low noise design allows installation close to high-voltage load center to effectively reduce line loss
Unified American standard installation dimensions, simple construction process and low overall project cost
Keep installation site dry, well ventilated and free of corrosive harmful gases
Reserve sufficient high-voltage safety insulation distance and heat dissipation space in accordance with ANSI installation regulations
Ensure firm and horizontal foundation mounting to avoid equipment vibration and deformation during operation
Adopt standard American high-voltage cable connection, ensure reliable grounding (grounding resistance ≤ 4Ω)
Complete set of high-voltage intelligent temperature monitoring and control system
Integrated overcurrent, overload and overtemperature multi-protection mechanism
Equipped with high-voltage surge arrester for overvoltage and lightning protection
Compatible with traditional and intelligent high-voltage power distribution systems in North America
Winding DC resistance accurate measurement
Voltage ratio, polarity and vector group verification
Insulation resistance and power frequency withstand voltage test
No-load loss, load loss and temperature rise test
Full function verification of temperature control and high-voltage protection system
Full dry-type oil-free design, truly maintenance-free in daily use
Regular routine inspection: appearance status, operating temperature, connection fastness and running noise
Periodic dust cleaning for ventilation channels to ensure good heat dissipation
Support remote intelligent monitoring, realize digital unified operation and maintenance management
Long service life design under standard rated working conditions
Strong environmental adaptability, fine resistance to moisture, dust and salt fog erosion
Perfect for super high-rise buildings, closed indoor spaces and all fire-preferred high-voltage power supply scenarios
| Item | Core Content | Recommended Scheme/Standard |
|---|---|---|
| Type | 34.5kV three-phase dry-type distribution transformer | Cast resin, full copper winding, US high voltage standard |
| Standards | Mainstream American high-voltage power industry standards | ANSI C57.12 series, IEEE C57 series, compatible with IEC & GB |
| Performance | Low loss, low noise, high energy efficiency | Surpasses ANSI/IEEE high-voltage standard technical parameters |
| Fire Class | F1 flame retardant, non-toxic, smokeless & self-extinguishing | Prioritized choice for indoor high-voltage projects per US fire codes |
| Lightning Impulse | 34.5kV level: 95kV | Powerful high-voltage lightning and surge resistance |
| Cooling Mode | AN / AF dual cooling mode | AF mode supports stable operation under 120% rated load |
| Enclosure | Aluminum alloy / cold-rolled steel / stainless steel | IP20 / IP23 optional, customizable as required |
| Application | US standard 34.5kV power grid, industrial & civil high-voltage power distribution | Fire-safe, maintenance-free high-reliability high-voltage power solution |
Hengfengyou 34.5kV US standard three-phase dry-type distribution transformer integrates high safety, high efficiency, low noise, environmental protection and maintenance-free comprehensive advantages. With decades of professional high-voltage transformer manufacturing experience and rich practical experience in overseas American-standard high-voltage projects, it adopts advanced high-vacuum integral casting technology, high-quality low-loss core and full-set intelligent temperature protection system. All technical performances strictly comply with ANSI and IEEE American high-voltage power standards, fully meeting the high-voltage power distribution demands of modern North American large-scale power grids, heavy industrial production and super large civil construction projects.
This product series has been exported to more than 50 countries globally, winning wide application and high market praise in North America, Latin America and other American-standard high-voltage power markets. We provide global customers with safe, stable, energy-saving and long-service-life professional high-voltage power distribution solutions for various indoor enclosed spaces and fire-control key scenarios.
Q1: What is a 34.5kV US standard dry-type distribution transformer?
A: It is ANSI/IEEE certified cast-resin oil-free flame-retardant high-voltage transformer, specially developed for 34.5kV American-standard power grid, widely used in indoor high-voltage substations, large industrial power supply and fire priority protection areas in North America.
Q2: What are the advantages of 34.5kV US standard dry-type transformer compared with oil-immersed transformer?
A: It is flame retardant, non-toxic, oil-free with no leakage and explosion hazards, low operating noise and free of daily maintenance. It meets the most stringent American high-voltage power and building safety regulations, being the optimal core equipment for indoor high-voltage power distribution.
Q3: What fire resistance grade does it achieve?
A: It reaches F1 top-level fire resistance grade, featuring self-extinguishing, halogen-free, smokeless and non-toxic properties, fully in line with US NFPA high-standard fire protection specifications.
Q4: What is its lightning impulse withstand voltage?
A: The 34.5kV high-voltage model has lightning impulse withstand voltage of 95kV, with excellent lightning protection and grid overvoltage suppression capability.
Q5: Can it operate under overload condition?
A: Yes. Equipped with forced air cooling system, it can run stably for a long time at 120% rated load.
Q6: What protection classes are available?
A: IP20 indoor anti-touch type and IP23 rainproof type are available, and enclosure materials can be customized according to actual site environment.
Q7: Does it need complicated daily maintenance work?
A: Basically maintenance-free. Only simple regular appearance inspection, temperature check and dust cleaning are needed.
Q8: What are its main applicable scenarios?
A: North American 34.5kV high-voltage distribution network, large commercial buildings, hospitals, large data centers, super high-rise buildings and various US-standard heavy industrial plants.
Q9: Which standards does it comply with?
A: It strictly follows core American standards including ANSI C57.12.01, ANSI C57.12.22 and IEEE C57 series, and is compatible with IEC and GB standards, fully satisfying overseas high-voltage market access and international project bidding requirements.
