Catalogue · ROCKWILL

H61 HV/LV distribution transformer

Q: What are the differences between H61 and H59?

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.

Widely used in overhead distribution lines, urban & rural power distribution, industrial plants, commercial buildings, solar power distribution projects.

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Updated2026.09

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H61 distribution transformer

Document description

This catalog covers full specifications and features of the H61 HV/LV distribution transformer.It provides key technical data for your selection and application reference.

H61 HV/LV distribution transformer is hermetically sealed oil immersed ONAN transformer complying with IEC 60076 and NF C52-112. It adopts top HV bushings and side LV bushings, copper winding and CRGO core. Rated capacity ranges from 25kVA to 2000kVA, high voltage up to 33kV. It is specially designed for outdoor pole or ground mounting overhead distribution networks for medium to low voltage power conversion, applied in urban distribution, industry and renewable energy projects.

Frequently asked questions

Can H61 support dual‑voltage and single‑phase customized requirements?

Yes. Single‑phase, three‑phase and various dual‑voltage combinations can be customized according to project requirements.

What is the key structural feature of H61 transformer?

It features side‑out LV bushings and top‑out HV bushings, designed for single‑pole suspended outdoor installation to save site footprint.

What are the differences between H61 and H59?

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.

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500-1000 2008 China

Wenzhou Rockwill Electric Co., Ltd. is the mother company of Rockwill Electric Group, a global manufacturer of medium-voltage (MV) and high-voltage (HV) power transmission and distribution equipment. Founded in 1986 and headquartered in Wenzhou, Zhejiang, China, with a Lishui smart manufacturing base, Rockwill serves utilities, EPC contractors, and distributors in 100+ countries. Rockwill designs and manufactures 0.38 kV–550 kV transformers, MV step voltage regulators, auto reclosers, vacuum circuit breakers, SF6-free switchgear, RMU, GIS, capacitor switches, metering units, prefabricated substations, and grid automation systems. All core products are built on 100% in-house R&D and a full-chain digital manufacturing management system.

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