Customizable S11-M Hermetically Sealed Oil-Immers | RFQ Sourcing Details

This S11-M series oil-immersed power transformer is presented as a customizable pad-mounted unit for power and distribution duties. Its hermetically sealed design uses a corrugated tank to regulate changes in oil volume while isolating the transformer oil from air.

The stated purpose of this arrangement is to limit oil deterioration and insulation aging without requiring an oil conservator on most listed capacities. The core is made from high-permeability, low-loss cold-rolled silicon-steel laminations with minimized joint gaps and staggered joints.

The published design objectives include reduced no-load loss, no-load current, and acoustic noise. A compact internal structure is also stated to reduce radial forces during short-circuit events.

Copper and aluminum winding options are available, and voltage ratios can be customized for the required project configuration. The supplied technical table covers ratings from 30 to 2,500 kVA. Listed high-voltage selections are 6, 6.3, 10, 10.5, and 11 kV, with a listed low-voltage value of 0.4 kV.

Connection symbols shown are Dyn11 and Yyn0. Published short-circuit impedance is 4.0% through 500 kVA and 4.5% from 630 through 2,500 kVA. Model-specific loss, no-load-current, outline-dimension, and installation-dimension values are available in the configuration table.

The listed outline dimensions are reference values rather than final construction dimensions. The 2,000 and 2,500 kVA versions may use an oil-conservator structure or an elastic-fin structure. The product information identifies IEC 60076 and GB 1094 as applicable standards and lists CCC certification.

It also states IEC and CE compliance and ISO 9001 quality-management certification. Buyers should request the exact certificates, test reports, drawings, and standards schedule applicable to the ordered configuration rather than assuming every document applies to every rating or destination.

Before procurement, confirm the required phase arrangement because the product title describes a three-phase transformer while one attribute also references single-phase usage.

The buyer should also define rated capacity, primary and secondary voltages, frequency, vector group, tap arrangement, winding material, cooling configuration, installation environment, altitude, temperature limits, impedance, permitted losses, accessories, enclosure requirements, and required country-specific approvals.

Final dimensions, foundation interfaces, terminal arrangement, shipment configuration, and acceptance tests should be approved from project-specific drawings and documentation before manufacture.