Widely used in compact prefabricated substations, urban & rural power distribution, industrial plants, commercial buildings, solar and wind power distribution projects.
This catalog introduces the H59 HV/LV distribution transformer, covering its core specifications and performance features.It provides detailed technical data to support your product selection and engineering design.
H59 HV/LV distribution transformer is hermetically sealed oil immersed ONAN transformer complying with IEC 60076 and NF C52-112. It adopts top HV/LV bushing structure, copper winding and CRGO core. Rated capacity ranges from 25kVA to 2500kVA, high voltage up to 33kV. Mainly installed in compact MV/LV substations for medium to low voltage power conversion, applied in urban distribution, industry and renewable energy projects.
ROCKWILL® H59 Transformer: Top-mounted HV/LV bushings for tight spaces. Advanced technology & competitive pricing for distribution automation.
Oil-immersed step-down distribution transformers for efficient and reliable voltage reduction in utility and industrial networks.
Discover low-loss oil-immersed distribution transformers for 6kV, 7.2kV, and 12kV – efficient, reliable, and built for utility networks.
Vector group: Dyn0, Dyn11, Yzn11; short‑circuit impedance 4% or 6% optional at 75℃.
As 10kV oil-immersed transformers, H59 must meet the Level 3 energy efficiency limit of GB 20052 to be legally sold. Most standard products reach Level 3 (equivalent to the S13 level). However, as they are not specifically positioned for extreme energy savings, they usually do not apply for Level 1 or Level 2 energy-saving certifications. If a project strictly requires Level 1 efficiency, the S22 model should be selected.
Yes, customized manufacture is available. We provide complete solutions including design, assembly and testing according to project requirements.
H61 is a small-capacity (≤160kVA) hermetically sealed pole-mounted distribution type with epoxy plug‑in bushings and no oil conservator, while H59 is its upgraded version, covering 50–800kVA+ with improved insulation and heat dissipation.
We offer 5‑10 years warranty. Standard projects get 5‑year warranty; pole‑mounted / rural electrification projects can qualify for 10‑year warranty for manufacturing‑related defects. Damage from misuse is excluded.
H59 three‑phase oil‑immersed transformer complies with IEC and NF C52 power‑equipment standards.
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