How to Choose the Right Dry-Type and Oil-Immersed Transformers

How to Choose the Right Dry-Type and Oil-Immersed Transformers

Crafting Energy Efficiency, Building a Safe Future — CEHO Electric Power Technology Group Co., Ltd.’s Comprehensive Solutions for Dry-Type and Oil-Immersed Transformers

With the full-scale advancement of the new power system and the in-depth implementation of the “Dual Carbon” goals, distribution transformers have become core equipment for efficient energy conversion and the safe, stable operation of power grids. CEHO Electric Power Technology Group Co., Ltd. has deeply engaged in the entire industrial chain of power equipment R&D, production, sales, and service. Adhering to the philosophy of “Safety First, Innovation-Driven, Quality Above All, Green Empowerment,” proudly launches two premium series: dry-type and oil-immersed transformers. Through cutting-edge technology, rigorous quality control, and customized services, we precisely address diverse distribution needs across various scenarios. We provide stable, reliable, energy-efficient, compliant, and worry-free power solutions throughout the entire lifecycle for industries across the board, helping customers achieve safe operation and maintenance, cost reduction and efficiency gains, and green development.

Safety and environmental protection are the core priorities for power distribution equipment. CEHO Electric’s dry-type transformers utilize advanced epoxy resin vacuum casting or Nomex paper insulation processes, employing air as the cooling medium. They are oil-free, leak-free, fireproof and explosion-proof, and are environmentally friendly and pollution-free. They completely eliminate the risks of fire, explosion, and environmental pollution. With an insulation class of F/H, they fully comply with the GB50016 fire safety code and the GB 20052-2024 mandatory energy efficiency standards. No additional fire protection facilities are required, ensuring truly worry-free safety. Oil-immersed transformers, on the other hand, rely on mature sealing technology and high-quality insulating oil to ensure efficient heat dissipation and stable performance. Through rigorous process control, the risk of leakage is significantly reduced, making them suitable for harsh outdoor environments while balancing safety and durability.

Precise adaptation to specific scenarios, worry-free operation and maintenance throughout the entire lifecycle. For indoor installations in high-occupancy areas with stringent fire safety requirements—such as commercial complexes, data centers, hospitals, schools, subway stations, and high-rise building basements—CEHO dry-type transformers are compact and flexible to install. They offer maintenance-free or low-maintenance advantages, requiring only periodic dust removal and inspections. Maintenance downtime is brief, ensuring no disruption to normal operations. With single-unit capacities covering mainstream demands, they are the preferred choice for urban new infrastructure and civil buildings. For outdoor substations, industrial parks, wind and solar power step-up stations, and large-capacity centralized power supply scenarios, CEHO oil-immersed transformers, with their high-capacity coverage, exceptional weather resistance, and stable load-bearing capabilities, effortlessly handle harsh outdoor environments and continuous heavy-duty operation. Their mature and reliable technology meets the high-power demands of industrial production and energy transmission.

High efficiency, energy savings, and cost reduction make them more cost-effective over the entire lifecycle. CEHO Electric’s full range of transformers strictly complies with GB 20052-2024 Class 1/2 energy efficiency standards, eliminating low-efficiency energy consumption and helping customers achieve compliant operations, energy conservation, and carbon reduction. Dry-type transformers feature lower no-load losses and significant energy-saving advantages in light-load scenarios. Although the initial purchase cost is slightly higher, their lifecycle operation and maintenance costs are extremely low, offering outstanding long-term value; Oil-immersed transformers offer a more favorable initial investment and excel in load loss performance, maximizing cost-effectiveness in high-capacity applications while balancing upfront investment with long-term operating costs.

Core Corporate Advantages: Trust Built on Strength:

✅ R&D: With a dedicated R&D team and continuous process improvements, our products lead the industry in performance;

✅ Rigorous Quality Control: Standardized production throughout the entire process and multiple testing procedures ensure the stability and durability of every unit;

✅ End-to-End Service: We provide one-stop services including selection consultation, custom manufacturing, installation guidance, and after-sales maintenance;

✅ Compliance and Standards: Our entire product line meets national mandatory standards for energy efficiency, fire safety, and environmental protection, with all necessary certifications;

✅ Customized Solutions: We tailor optimal power distribution solutions based on customer scenarios, load requirements, and budget.

Compliance drives development; quality safeguards power usage. With the full implementation of new energy efficiency regulations in February 2025, CEHO Electric has taken the lead in responding to national policies. All products have passed authoritative testing and comply with the GB 20052-2024 energy efficiency requirements and the mandatory GB 51348-2019 standards for civil buildings. From R&D and production to delivery, we enforce rigorous quality control throughout the entire process. Every transformer undergoes multiple tests to ensure stable, reliable, and long-term operation.

From urban buildings to industrial parks, and from data centers to renewable energy stations, CEHO Electric’s dry-type and oil-immersed transformers have become the trusted choice of countless customers thanks to their complementary applications, leading technology, superior quality, and comprehensive service. Looking ahead, CEHO Electric Power Technology Group Co., Ltd. will continue to deepen its expertise in the power equipment sector. We will drive product upgrades through innovative technology and safeguard electrical safety with meticulous craftsmanship. We are committed to making a solid contribution to the development of new power systems and the achievement of the “dual carbon” goals, working hand in hand with our customers to build a green, safe, and efficient energy future!

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