S11‑M Distribution Transformer

The S11‑M hermetically‑sealed oil‑immersed distribution transformer complies with IEC 60076 standards, a reliable and cost‑effective choice for global power‑distribution projects. Popular in Southeast Asia, Africa, the Middle East and Latin America. It adopts a corrugated fully‑sealed tank without conservator tank. The hermetically‑sealed structure blocks air and moisture ingress, slowing oil oxidation and insulation aging. It requires minimum routine maintenance and delivers stable performance under high‑temperature, humid and coastal salt‑fog corrosive conditions. Built with silicon‑steel core and full pure‑copper windings, ONAN cooling for 24‑hour continuous outdoor operation. Standard primary voltages: 10 kV / 11 kV; standard secondary output: 0.4 kV. Standard capacity ranges from 30 kVA to 2500 kVA for residential, commercial and industrial applications. We support flexible customization to meet local grid requirements. Customizable items include special voltage classes, non‑standard capacity, 50 Hz / 60 Hz frequency, vector group, impedance value and off‑circuit tap‑changer. Suitable for regular grid upgrade, mining sites and remote‑site projects. Every unit undergoes complete factory testing prior to shipment. Please send us your technical specifications for a formal quotation.

Operating Conditions

Normal Service Conditions

Ambient temperature: Max +40 °C, Min ‑25 °C
Altitude: ≤1000 m above sea‑level. Derated design needed for altitude over 1000 m
Installation: Indoor / outdoor. Free of heavy vibration, explosive hazard, corrosive gas and heavy conductive dust
Supply voltage: Approximately sinusoidal waveform
Max installation tilt: 3°

Special Service Conditions (Custom‑built required)

Please notify us at inquiry if your site meets any items below for tailored design:

Altitude >1000 m
Continuous temperature above +40 °C or below ‑25 °C
Coastal salt‑fog, chemical corrosive atmosphere
Heavy dust or mine explosion‑proof requirement
Frequent mechanical shock and vibration

Product Selection & Inquiry Reference Table

Status	Parameter Item	Standard Specification	Your Requirement
S11‑M Hermetically‑sealed Distribution Transformer Inquiry Parameter Form
Please fill in the mandatory parameters first; optional parameters are for special requirements only. We will provide a formal quotation within 24 hours after receiving your complete requirements.
Mandatory Core Parameters (Required for Quotation)
Required	Transformer Series/Model	S11‑M Hermetically‑sealed Oil‑immersed Distribution Transformer
Required	Rated Capacity	30kVA ~ 2500kVA
Required	Primary (HV) Rated Voltage	Standard: 10kV / 11kV, other HV voltage upon request
Required	Secondary (LV) Rated Voltage	Standard: 0.4kV (400V)
Required	Rated Frequency	Standard: 50Hz / 60Hz
Required	Winding Material	Standard: Pure Copper (Aluminum winding upon request)
Optional Customization Parameters (For Special Requirements Only)
Status	Parameter Item	Standard Specification	Your Requirement
Optional	Impedance Voltage (Uk%)	Standard:4% (≤630kVA), 6% (≥800kVA)
Optional	Vector Group	Standard: Standard: Dyn11; Yyn0 upon special request
Optional	Tap Changer Type	Standard: Off‑circuit Tap Changer (OCTC)
Optional	Tap Range	Standard: ±2×2.5%
Optional	Cooling Method	Standard: ONAN (Oil Natural Air Natural)
Optional	Special Environmental Requirements	e.g. coastal anti‑corrosion, special paint class, high temperature, high altitude
Additional Project Information
Please provide additional project details (e.g. application scenario, order quantity, target delivery date, other technical specifications):