• Product advantages
• Product parameters
• Ordering instructions

Product advantages

---

 

Global Certification Standards
Our H61 Distribution Transformer strictly complies with international mainstream power equipment standards and European grid access specifications. The product fully conforms to IEC 60076 international transformer standards, EN 60076 European standard and national GB/T 1094 series standards. It has obtained CE certification (LVD/EMC) for EU market entry and ISO9001 quality management system certification. Each transformer undergoes rigorous factory testing including partial discharge detection, power frequency withstand voltage test, short-circuit resistance test, temperature rise test and full-load continuous operation test, fully meeting global grid safety and energy efficiency access standards.

H61 Distribution Transformer Exported Countries & Market Coverage
Benefiting from standard H61 design, ultra-low loss performance and full international certifications, our H61 Distribution Transformers have been widely exported to global high-standard grid markets. It has stable long-term operation cases in European countries (Italy, Spain, Poland, Romania, Bulgaria), Southeast Asia (Thailand, Malaysia, Indonesia, Vietnam), Middle East (UAE, Saudi Arabia, Qatar), Africa (South Africa, Ghana, Kenya, Nigeria), Central Asia (Kazakhstan, Uzbekistan) and South America (Chile, Peru, Colombia). The product adapts to 50Hz/60Hz dual-frequency grid systems and meets high-standard energy-saving and safety requirements of European and international power grids.

H61 Distribution Transformer  Features
1. H61 Standard Ultra-Low Loss Design: Adopts high-performance grain-oriented silicon steel sheet and optimized magnetic circuit structure, strictly following H61 industry design specifications. The no-load loss and load loss are far lower than conventional transformers, reaching the latest international super energy-saving level, effectively reducing long-term grid energy waste.
2. Stable Oil-Immersed Cooling System: Adopts ONAN natural oil circulation cooling mode, with reasonable internal oil circuit layout and large-area heat dissipation structure. It ensures uniform heat dissipation inside the equipment, effectively controls temperature rise under full-load and intermittent overload operation, and avoids thermal aging of insulating materials.
3. Excellent Anti-Short Circuit & Anti-Impact Performance: The winding adopts reinforced fastening structure and high-strength insulating materials. Through professional short-circuit resistance structural design, it can resist instantaneous current impact and external grid fluctuation, effectively preventing winding deformation and equipment damage, and improving operational stability in complex grid environments.
4. Low Noise & Environmentally Friendly Operation: Optimized core lamination process and vibration reduction structure design effectively suppress electromagnetic noise and mechanical vibration. The full-sealed oil tank structure avoids insulating oil leakage, realizing low noise, pollution-free and environmentally friendly operation, suitable for urban and residential dense areas.
5. Strong Environmental Adaptability: The outer shell adopts high-strength steel plate and anti-corrosion electrostatic spraying treatment, with good waterproof, dustproof, rust-proof and anti-aging performance. It can stably adapt to various climatic environments such as high temperature, low temperature, humidity and sandstorm, suitable for indoor and outdoor long-term unattended operation.

H61 Distribution Transformer Advantages
1. Superior Energy-Saving & Low Operating Cost: H61 high-standard energy-saving design greatly reduces no-load and load power consumption. Although the initial investment is moderate, it can save a large amount of electricity costs for users in long-term operation, with significant economic and energy-saving benefits.
2. High Safety & Low Failure Rate: Adopts mature and reliable H61 standard system and high-quality matching accessories. With strict factory testing and stable structural performance, the equipment has strong grid adaptability and extremely low failure rate, reducing maintenance and replacement costs caused by equipment failure.
3. Green & Low-Carbon & Policy Compliant: Meet international and European energy-saving and carbon emission reduction standards, fully compliant with global green power grid construction policies. It is the preferred model for grid upgrading, new energy matching and energy-saving renovation projects in various countries.
4. Easy Installation & Wide Compatibility: Adopts universal standard size and interface design, compatible with most global grid distribution systems. It supports indoor platform installation and outdoor floor-mounted installation, with simple on-site construction, short commissioning cycle and strong project adaptability.
5. Standardized Customization & Complete Service: Support customized voltage ratio, capacity, wiring group and protection configuration according to user project requirements. Equipped with complete international certification documents and multilingual technical materials, providing global professional after-sales technical support and long-term operation guidance.


H61 Distribution Transformer FAQ

1. Product Definition & Applicable Standards

Q1: What is an H61 distribution transformer? What scenarios is it specially designed for?
A1: The H61 series is a special pole-mounted oil-immersed distribution transformer, widely adopted in European, African and Middle Eastern power grid standards, differentiated from conventional floor-standing 6kV/6.6kV/13.8kV industrial transformers. It features compact structure, lightweight design and pole-mounted installation, mainly used for rural power grid renovation, urban community terminal power distribution, roadside power supply, remote mining area decentralized power consumption and overhead line matching scenarios. It focuses on low-power decentralized distribution rather than large-scale industrial centralized power supply, being the core terminal power distribution equipment for overhead medium-voltage grids.
Q2: What international standards do H61 transformers comply with? Are they adapted to European grid specifications?
A2: Our H61 pole-mounted transformers are fully designed and tested per IEC 60076 series, CEI European power grid standards and EcoDesign energy efficiency directives, fully matching mainstream 10kV/15kV/20kV overhead grid specifications in Europe, Africa and West Asia. Meanwhile, it supports compliance with GOST, SASO and other regional standards. Unlike utility-grade 13.8kV transformers focusing on public grid main network operation, H61 targets terminal decentralized distribution networks, with more flexible grid access conditions, stronger overhead line adaptability and exclusive European EcoDesign energy efficiency certification support.
Q3: Can you provide complete certification documents for H61 transformers? Are EU project filing documents available?
A3: We provide full sets of official certification documents for H61 series products, including IEC standard type test reports, CE certification, EcoDesign energy efficiency certificate, factory FAT test reports and production qualification certificates. For European overhead grid projects and rural power renovation projects, we can provide customized English and French official documents, supporting local project filing, customs clearance and grid access acceptance, fully meeting EU terminal power distribution equipment access standards.

2. Core Structural & Technical Differentiations

Q4: What is the core structural feature of H61 transformer? How is it different from H59 and conventional transformers?
A4: The biggest advantage of H61 transformer is its integrated pole-mounted lightweight structure, equipped with special bottom pulley fixing structure and dual lifting lugs, supporting direct overhead pole installation without concrete foundation, which is the core difference from floor-standing H59 transformers and industrial transformers. The whole machine adopts miniaturized compact optimization design, with smaller overall size and lighter weight, convenient for overhead line hoisting and manual installation. The internal structure uses high-density laminated insulating wood and fully filtered insulating oil, effectively avoiding structural displacement and oil deterioration under long-term overhead vibration, adapting to outdoor overhead long-term operation scenarios.
Q5: What voltage levels and capacity ranges are available for H61 series transformers?
A5: H61 pole-mounted transformers cover exclusive medium-voltage grades for terminal distribution: 10kV, 15kV, 20kV high voltage, 0.4kV low voltage, with conventional capacity ranging from 30kVA to 1600kVA, covering all terminal civil and small industrial power demand. Different from high-capacity industrial and utility transformers, H61 focuses on small and medium-capacity refined distribution, with more refined parameter matching for decentralized load, no redundant power waste, and higher energy efficiency for long-term light-load operation of rural and urban terminal grids.
Q6: What winding and core technologies are adopted for H61 transformers? What are the energy efficiency advantages?
A6: H61 series adopts high-permeability CRGO silicon steel sheet toroidal core and high-density oxygen-free copper winding (aluminum alloy winding optional), with optimized circular winding structure to reduce magnetic leakage loss. It complies with EU EcoDesign high energy efficiency standards, with ultra-low no-load loss and load loss, significantly reducing long-term operation energy consumption compared with conventional transformers. The winding adopts anti-vibration fixed binding process, which can resist long-term overhead wind vibration and line impact load, avoiding loose winding and partial discharge faults, and improving outdoor operation stability.
Q7: What are the environmental adaptability advantages of H61 pole-mounted transformers for outdoor overhead scenarios?
A7: Targeting outdoor overhead harsh operation environments, H61 transformers adopt targeted environmental optimization design. The whole machine is equipped with full sealed anti-leakage structure and high-quality aging-resistant rubber sealing parts, effectively preventing rainwater, dust and moisture from invading, adapting to long-term outdoor sun exposure and rain erosion. It supports normal operation in ambient temperature of -40℃ to +40℃, and is equipped with standard lightning arrester, oil level gauge and pressure relief valve. It has excellent wind resistance, seismic performance and salt spray resistance, suitable for rural overhead lines, urban roadside poles and remote open-air distribution points.
Q8: What is the noise level and operation life of H61 transformers?
A8: Benefiting from toroidal core mute structure and anti-vibration optimization design, the standard operating noise of H61 transformers is ≤52dB, far lower than industrial transformers of the same grade, meeting European urban and rural environmental protection noise standards. The design service life reaches 20 years, and the outdoor stable operation life can be extended to 25 years with regular inspection and maintenance. The anti-aging insulating oil and sealed structure effectively delay internal insulation aging, adapting to unattended long-term outdoor operation of terminal distribution networks.

3. Customization & Installation Adaptability

Q9: What customized services are supported for H61 pole-mounted transformers?
A9: We support exclusive customized optimization for H61 European standard pole-mounted transformers, including 50Hz/60Hz frequency conversion adaptation, special voltage ratio adjustment, anti-corrosion coating upgrade for coastal and humid areas, low-temperature resistance reinforcement for high-altitude and cold regions, and customized logo and nameplate in multiple languages. Core accessories such as high and low voltage insulators, lightning arresters and temperature measuring devices can be upgraded to European famous brand accessories. All customized parameters are recorded in technical agreements to fully match local overhead grid construction standards.
Q10: What are the installation advantages of H61 transformer? Is professional foundation construction required?
A10: The biggest installation advantage of H61 transformer is foundation-free pole-mounted installation. The bottom is equipped with fixed pulleys and mounting brackets, which can be directly fixed on overhead cement poles or steel poles without concrete foundation pouring, greatly saving project construction cost and shortening installation cycle. The whole machine is lightweight and compact, supporting manual hoisting and rapid installation, especially suitable for remote rural areas, mountainous areas and roadside decentralized power supply scenarios where large construction equipment cannot enter.
Q11: Can you provide installation dimension drawings and pole matching parameters?
A11: Official quotations and technical documents are attached with complete H61 exclusive installation drawings, pole type matching parameters, hoisting size data and center of gravity parameters. We provide professional pole type selection guidance according to European and African common overhead pole specifications, ensuring perfect matching with local power pole facilities. For special pole type projects, we can adjust the mounting bracket size in a targeted manner to achieve zero adaptation error.

4. Production, Testing & Delivery

Q12: What is the production cycle of H61 series transformers? How to guarantee delivery for rural grid projects?
A12: The production cycle of standard H61 pole-mounted transformers is 10–18 working days, which is shorter than industrial and utility transformers. For customized energy-saving upgraded models and special environmental adaptation models, the cycle is 18–30 working days. We adopt streamlined dedicated production lines for pole-mounted transformers, with sufficient conventional capacity stock. For large-scale rural power grid renovation projects, we implement priority scheduling and phased delivery to ensure project construction progress.
Q13: What professional tests will H61 transformers undergo before delivery? Is third-party witnessing acceptable?
A13: All H61 transformers pass 100% full-item professional testing before delivery, including overhead vibration simulation test, lightning impulse test, partial discharge test, energy efficiency loss test, sealing performance test and temperature rise test, aiming at outdoor pole-mounted operation characteristics. We fully support SGS, BV, TUV and other third-party on-site FAT witnessing and batch sampling inspection, and can provide exclusive test reports for pole-mounted distribution equipment to meet European project acceptance standards.
Q14: What export packaging is adopted for H61 transformers to adapt to long-distance transportation?
A14: H61 transformers adopt lightweight export special packaging, with multi-layer anti-rust, moisture-proof and shockproof protection. Small and medium-capacity models support full oil-sealed delivery for rapid on-site installation; large-capacity customized models adopt oil-drained nitrogen-filled protection, equipped with transportation vibration recorders. All wooden cases pass IPPC fumigation treatment, fully meeting EU, African and Middle Eastern import quarantine standards and long-distance sea and land transportation requirements.

5. Quotation, Customs & Logistics

Q15: What is the quotation validity of H61 transformers? Is the price stable?
A15: The standard quotation validity of H61 series pole-mounted transformers is 15 days with fixed price. For large-scale rural grid renovation batch orders and long-term cooperative projects, the quotation validity can be extended to 120 days, free from short-term raw material price fluctuations. Expired quotations can be reissued free of charge according to the latest project requirements and European energy efficiency standards.
Q16: What payment terms are supported for H61 overseas projects?
A16: We support flexible international payment methods suitable for civil distribution grid projects, including TT telegraphic transfer and irrevocable sight L/C. For long-term cooperative EPC projects and government rural power renovation projects, the advance payment ratio can be negotiated flexibly. All business terms are standardized in formal foreign trade contracts to ensure safe and compliant transactions for both parties.
Q17: Can you provide preferential customs clearance documents for H61 transformers?
A17: We provide complete customs clearance documents including CO certificate of origin, FORM A, FORM E and EU preferential tariff certificates, which can help customers apply for tariff reduction and exemption, simplify European and African customs clearance procedures, and effectively reduce project import costs. All documents comply with local terminal power equipment import filing standards.
Q18: What logistics solutions are available for H61 lightweight transformers?
A18: Benefiting from lightweight and compact features, H61 transformers support diversified low-cost logistics solutions, including sea freight, China-Europe railway, cross-border truck transportation and bulk consolidated shipment, with no over-limit transportation risks. We recommend the most cost-effective logistics scheme according to project location and delivery cycle, greatly saving transportation costs for terminal distribution projects.

6. After-sales Service & Quality Guarantee

Q19: What is the warranty policy for H61 pole-mounted transformers?
A19: The standard warranty period of H61 series transformers is 1 year. For European standard energy-saving projects and rural grid key projects, the warranty period can be extended to 2–3 years. The warranty covers all manufacturing defects and original accessory quality faults. Faults caused by unauthorized disassembly, improper operation, man-made damage and natural disaster impact are excluded from the warranty scope.
Q20: Do you provide lifelong spare parts supply and technical support?
A20: We provide lifelong supply of exclusive original spare parts for H61 transformers, including lightning arresters, sealing parts, insulators and pressure relief valves, with 100% model matching. We provide 24/7 global online technical support, quickly solving on-site installation, commissioning and daily operation faults of pole-mounted equipment. For overseas large-scale projects, we can arrange on-site guidance and SAT acceptance services.
Q21: What quality control system is adopted for H61 products?
A21: Our factory strictly implements ISO9001 full-process quality management system, and formulates exclusive inspection standards for pole-mounted transformers aiming at vibration resistance, sealing performance and outdoor weather resistance. Every H61 transformer passes strict vibration simulation test and aging test before delivery. We fully support third-party factory audits and sampling inspections to ensure stable and reliable quality of exported equipment.

Product parameters

---

• Rated Capacity Range: 30kVA ~ 2500kVA

• Rated High Voltage: 10kV / 11kV / 20kV / 35kV (customizable)

• Rated Low Voltage: 0.4kV / 0.415kV (customizable)

• Rated Frequency: 50Hz / 60Hz (global universal)

• Cooling Method: ONAN (Oil Natural Air Natural)

• Insulation Grade: Class A

• Protection Grade: IP20 / IP23 (optional)

• Operating Temperature Range: -40℃ ~ +55℃

• Energy Efficiency Standard: Compliant with EU H61 super energy-saving standard

• Full-Load Noise: ≤55dB

• Installation Method: Indoor fixed installation / Outdoor floor-mounted installation

• Design Service Life: 25 years under standard operation and maintenance

Ordering instructions

---