35kV Oil‑Immersed Distribution Transformer Winding Conductor Supply
35kV oil‑immersed distribution transformers
Typical 35kV oil‑immersed distribution transformer configurations for which Shuoxin Electrical supplies winding conductors.
Project context for 35kV distribution transformer procurement
This proposal addresses the winding conductor requirements for oil‑immersed distribution transformers rated 35 kV on the high‑voltage side.
Project Scenario
35kV substation construction · industrial park power distribution · renewable energy step‑up stations · mining power systems · urban grid expansion · rural electrification programmes
Transformer Technical
ONAN cooling · OLTC on‑load tap changer · Dyn11/Yyn0 connections · short‑circuit impedance 4–6% · copper/aluminium winding · mineral oil dielectric · IEC 60076
Critical Requirements
Superior oil compatibility · thermal class A/E(105°C) through C(220°C) · high‑conductivity electrolytic copper ≥99.95% · precision tolerance · inter‑layer insulation integrity
Target Markets
Southeast Asian distribution · Middle East oilfield · African mining · South American renewable · Central Asian rural grid · domestic 35kV projects
Precision‑engineered winding wires for 35 kV transformer windings
Shuoxin Electrical supplies three families of winding conductors purpose‑matched to HV and LV windings. All certified to IEC 60317, GB/T 6109, and NEMA MW 1000.
Paper‑Covered Copper & Aluminium Winding Wire
Primary recommendation for 35kV transformer HV windings. Multi‑layer Kraft paper or Nomex® aramid paper over copper or aluminium. 1–6 paper layers. A/E (105°C) to C (220°C). IEC 60317‑27, GB/T 7672, NEMA MW 22‑C.
Polyester Enameled Round Copper Wire
Recommended for 35kV transformer LV windings. Modified polyester enamel for reliable inter‑turn insulation. Thermal class B (130°C) and F (155°C). IEC 60317‑8, GB/T 6109.2, NEMA MW 5‑C, JIS C 3213.
Fiberglass‑Covered Copper Winding Wire
For 35kV transformers requiring elevated thermal endurance up to 200°C (class N). Alkali‑free glass fibre lapped and varnish‑impregnated. IEC 60317‑31/32, NEMA MW 41‑C, GB/T 7672.1.
35kV transformer winding conductor — consolidated specification
| Applicable transformer | 35 kV oil‑immersed distribution transformer (ONAN) |
| Capacity range | 630 kVA – 2,500 kVA |
| HV winding — recommended | Paper‑covered copper ZB / aluminium ZLB |
| LV winding — recommended | Polyester enameled copper QZ/PEW / fibreglass‑covered SBEB |
| Thermal class coverage | A/E (105 °C) · B (130 °C) · F (155 °C) · H (180 °C) · C (220 °C) |
| Insulation materials | Kraft paper · Nomex® aramid paper · polyester enamel · alkali‑free glass fibre |
| Conductor material | Electrolytic copper (Cu ≥ 99.95%) / aluminium (Al ≥ 99.70%) |
| Dimensional range | Round ∅ 0.05–8.00 mm / Rectangular 2.0–100 mm² |
| Applicable standards | IEC 60317 · GB/T 6109 · GB/T 7672 · NEMA MW 1000 · JIS C 3213 |
| Certifications | UL · ISO 9001 · ISO 14001 · OHSAS 18001 · RoHS 2.0 · REACH SVHC |
CRGO grain‑oriented silicon steel core
The magnetic core employs cold‑rolled grain‑oriented (CRGO) silicon steel in stacked lamination.
High‑voltage & low‑voltage coil assemblies
Transformer coils are formed by winding conductors around the magnetic core. Shuoxin Electrical currently specialises in winding conductor supply.
International standards compliance and full batch traceability
Every winding conductor shipment includes a Certificate of Conformance (CoC) with complete test data. Full‑chain traceability from raw material to dispatch.
IEC 60317
Full series compliance
UL Recognized
North American market access
ISO 9001:2015
Certified quality management
ISO 14001
Environmental management
RoHS 2.0
EU hazardous substance compliance
REACH SVHC
Full SVHC disclosure
NEMA MW 1000
North American magnet wire
Batch CoC Report
Resistivity · breakdown voltage · thermal shock
All winding wire shipments include a Certificate of Conformance (CoC) with detailed test data for: electrical resistivity, dielectric breakdown voltage, thermal shock resistance, flexibility & adhesion, solderability, insulation thickness, and dimensional conformance. Third‑party inspection by SGS, TÜV, or Intertek available upon request.
Agile manufacturing. Global logistics. Predictable delivery.
With 20 production lines and flexible batch manufacturing, Shuoxin Electrical guarantees rapid response from enquiry to delivery.
Day 1 — Technical consultation & specification confirmation
First response within one hour. Technical team verifies specifications and provides winding conductor selection recommendations.
Day 2–3 — Sampling & dispatch
Standard samples dispatched within 48 hours. Custom samples within 3–5 days.
Day 4–5 — Order confirmation & production scheduling
Formal contract following sample approval. Dedicated account manager for the full order lifecycle.
Day 6–20 — Batch manufacturing
Parallel production across 20 lines. In‑line process monitoring with full‑spectrum testing.
Day 21–25 — Final inspection · packaging · shipment
100% batch final inspection with CoC report. Sea (FCL/LCL), air (DDP), rail, or courier door‑to‑door delivery.
Standard lead time: Regular 15–20 days | Custom 20–25 days | Bulk (≥5t) 20–30 days. Expedited lane: 10–12 days. Logistics: Sea freight (FCL/LCL) · Air freight (DDP) · China–Europe Railway · DHL/UPS/FedEx for samples.
Submit your 35kV transformer winding conductor enquiry
Specify your transformer rating, winding conductor type, dimensions, and quantity. Our engineering team will respond within one business day.