Import 35kv Oil Transformer — Buy in Bulk from Supplier in China

This 35 kV oil-immersed transformer from Zhejiang Jiangshan Transformer Co., Ltd. is built for medium-voltage power distribution networks. The unit features a core assembled with three-step vertical and horizontal lap joints in a multi-stage configuration, a design that redistributes magnetic flux to reduce no-load losses, no-load current, and acoustic noise. The core uses dragged panels and pressed coils with a dedicated silicon steel adhesive to improve mechanical integrity. High and low voltage windings are arranged with optimised oil ducts and connections to increase short-circuit withstand capability. The tank is available in bell-type or core-suspension form with corrugated walls for oil expansion and mechanical flexibility. Remote monitoring functions (telemetry, telesignalling, remote adjustment, and remote control) allow unmanned substation operation from a central control room.

The transformer core material is cold-rolled grain-oriented silicon steel, standard for S9-series energy-saving designs that passed national mechanical and electrical industry bureau testing alongside national power group evaluation. The winding insulation system uses oil-impregnated paper and pressboard, with the insulating oil serving as both coolant and dielectric medium. Typical oil types for this class are mineral-based ASTM D3487 or IEC 60296 mineral oils, though the buyer should confirm the exact oil specification and whether alternatives such as ester fluids are offered. Standard accessories include conservator tanks, Buchholz relay, pressure relief device, and winding temperature indicators, though the precise fit-out must be verified with the supplier for each order.

Primary buyers are state grid corporations, municipal power bureaus, industrial facility engineers, and EPC contractors building 35 kV substations or distribution upgrades in networks where remote supervision is desired. The S9 designation indicates compliance with Chinese national energy-efficiency tiers for distribution transformers. Typical applications include urban and rural grid extensions, industrial park power supply, and renewable energy integration at the collection point. Import buyers should confirm the exact vector group, impedance voltage percentage, tap changer range (typically ±2×2.5% or ±5% for 35 kV class), and whether the unit is supplied with or without radiators and control cabinets. Incoterms, lead time, and exact MOQ are not stated and must be negotiated directly with Zhejiang Jiangshan Transformer Co., Ltd.

Zhejiang Jiangshan Transformer Co., Ltd. is located in Jiangshan, Zhejiang Province, China, with postal address 324100. The company holds a Harbor trust tier on this marketplace, with response rate listed at 0.00% and average response hours at zero, which suggests either a new listing, limited platform engagement, or data not yet populated. No verified third-party audit, ISO certification, or specific factory registration details are provided in the source material. Buyers should independently verify business licence, production licence for electrical equipment, and any CCC or GB/T compliance certificates before placing orders.

The supplier's product focus is oil-immersed distribution transformers for 35 kV networks, with emphasis on remote monitoring capability and reduced acoustic noise. The source description references national testing by the mechanical and industrial bureau and national power group, but does not provide test report numbers or dates. No information is given about annual production capacity, number of employees, export experience, or reference installations. Buyers should request factory inspection reports, type test certificates per IEC 60076 or GB/T 6451, and evidence of SCADA protocol compatibility (IEC 61850, Modbus, or proprietary) for the remote functions claimed.