10/0.4kV Oil-Immersed Transformer – Reliable Power Distribution, Ready for Bulk Supply
Why Buyers Choose Us: Capacity, Lead Time & Consistency
You need transformers that arrive on time, perform as specified, and keep your project moving.
We deliver exactly that — backed by high-volume production capacity, short lead times, and proven quality control for 10/0.4kV oil-immersed transformers used in utility distribution, industrial plants, rural electrification, commercial complexes, and renewable energy projects.
No delays. No specification mismatches. No surprise failures.
Product Overview – Built for Long-Term Outdoor Service
This three-phase, oil-immersed, 50/60Hz distribution transformer steps down 10kV primary voltage to 0.4kV (400V) secondary voltage. It is the most widely deployed distribution transformer for:
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Utility distribution substations
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Industrial plants (mining, manufacturing, chemical)
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Rural electrification projects
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Commercial buildings & shopping malls
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PV solar farms & wind power grid connection
Available in S9-M, S11-M, S13-M, S14-M, S15-M and other energy‑efficient series, fully compliant with IEC 60076, GB/T 6451, ANSI/IEEE, DOE standards.
Key Features That Resonate with B2B Buyers
✅ Low No‑Load & Load Losses – Lower OPEX
High-grade grain-oriented silicon steel core with step-lap joints significantly reduces core loss and excitation current. Your daily operating cost drops.
✅ Strong Short-Circuit Withstand – Less Downtime
High-strength winding structure + uniform ampere-turn distribution. Proven to survive grid faults without internal damage.
✅ Hermetically Sealed – Maintenance-Free for Years
Corrugated tank automatically compensates oil expansion. No air or moisture ingress → oil lasts longer, no periodic core inspection needed.
✅ Complete Protection Package
Standard: pressure relief valve. Optional: Buchholz relay, oil level gauge, winding temperature indicators. Connect directly to your SCADA or protection panel.
✅ Anti-Corrosion Coating – Works in Harsh Environments
Rigorous surface pretreatment + heavy-duty paint. Suitable for high humidity, coastal salt fog, and industrial pollution zones.
Production Capacity & Delivery Capability – Your Supply Chain Advantage
| Capability | Our Standard |
|---|---|
| Monthly production capacity | 300+ units (up to 3150kVA) |
| Standard lead time (ex‑works) | 15–25 days (depending on quantity) |
| Fast‑track lead time | 10–15 days for urgent projects |
| Batch size flexibility | From single units to 80+ units per shipment |
| After‑sales support | 12–24 month warranty + remote/onsite technical support |
✅ We support OEM / ODM requests – vector group, tapping range, impedance, paint color, bushing orientation, and accessories customized to your local grid code.
Technical Specifications (Reference – S13 Series)
| Rated Power (kVA) | HV (kV) | LV (kV) | Vector Group | No‑Load Loss (W) | Load Loss (W) | Impedance (%) |
|---|---|---|---|---|---|---|
| 50 | 10 | 0.4 | Dyn11 / Yyn0 | ~100 | ~870 | 4.0 |
| 100 | 10 | 0.4 | Dyn11 / Yyn0 | ~150 | ~1500 | 4.0 |
| 200 | 10 | 0.4 | Dyn11 / Yyn0 | ~240 | ~2730 | 4.0 |
| 315 | 10 | 0.4 | Dyn11 / Yyn0 | ~340 | ~3900 | 4.0 |
| 400 | 10 | 0.4 | Dyn11 / Yyn0 | ~400 | ~4520 | 4.0 |
| 500 | 10 | 0.4 | Dyn11 / Yyn0 | ~480 | ~5410 | 4.0 |
| 630 | 10 | 0.4 | Dyn11 / Yyn0 | ~570 | ~6200 | 4.5 |
| 800 | 10 | 0.4 | Dyn11 / Yyn0 | ~700 | ~7500 | 4.5–6.0 |
| 1000 | 10 | 0.4 | Dyn11 / Yyn0 | ~830 | ~10300 | 4.5–6.0 |
| 1250 | 10 | 0.4 | Dyn11 / Yyn0 | ~970 | ~12000 | 5.0–6.0 |
| 1600 | 10 | 0.4 | Dyn11 / Yyn0 | ~1170 | ~14500 | 5.0–6.0 |
| 2000 | 10 | 0.4 | Dyn11 / Yyn0 | ~1400 | ~17600 | 5.0–7.0 |
| 2500 | 10 | 0.4 | Dyn11 / Yyn0 | ~1650 | ~20700 | 5.0–7.0 |
Other capacities available up to 3150kVA – contact us for exact values.
Standard conditions: Altitude ≤1000m, ambient temperature -25°C to +40°C.
High‑altitude / low‑temperature designs available on request.
Tapping range: ±2×2.5% or ±5% (off-circuit tap changer).
Frequency: 50Hz or 60Hz.
Where Our 10/0.4kV Oil-Immersed Transformers Are Working Right Now
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Rural electrification (Africa, Southeast Asia, South America)
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Factory power distribution (Vietnam, Indonesia, Nigeria)
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Utility distribution substations
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Solar farm step-down stations
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Commercial & residential complexes
Common Customer Questions (We Answer Fast)
Q: Can you supply 80 units within 20 days?
A: Yes – our monthly capacity exceeds 300 units. We regularly fulfill large‑batch orders without delaying other customers.
Q: What is the difference between S9, S11, S13, S15?
A: Higher numbers indicate lower losses and higher efficiency. S13 and S15 meet Tier 1 or premium efficiency standards. We can recommend based on your local energy policy and payback requirements.
Q: Do you provide test reports before shipment?
A: Absolutely. Routine tests (IEC/ANSI/DOE) are included. Type tests or witnessed tests available upon request.
Q: Can I install this transformer outdoors without additional protection?
A: Yes – the corrugated tank and anti-corrosion coating are specifically designed for direct outdoor installation.
Q: Do you ship to remote project sites?
A: Yes – we work with major freight forwarders and can arrange inland delivery to your site.
Ready to Secure Your Transformer Supply Chain?
Stop searching. Start building.
Send us your technical requirements:
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Rated power (kVA)
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Voltage ratio (10/0.4kV standard – other ratios available)
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Vector group (Dyn11 / Yyn0 / others)
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Quantity and target delivery date
📩 Request a quote →
📞 We respond within 24 business hours with pricing, lead time, and engineering datasheet.
