# 33/0.4kV 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 33/0.4kV oil-immersed transformers used in utility, industrial, commercial, and renewable energy projects.
**No delays. No specification mismatches. No surprise failures.**
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## Product Overview – Built for Long-Term Outdoor Service
This **three-phase, oil-immersed, 50/60Hz distribution transformer** steps down 33kV primary voltage to 0.4kV (400V) secondary voltage. It is widely deployed in:
– Utility distribution substations
– Factory and mining power systems
– Commercial building complexes
– PV and wind power grid connection
– Agricultural and irrigation infrastructure
Available in **S9-M, S11-M, S13-M** and other energy‑efficient series, fully compliant with **IEC 60076, GB/T 6451, ANSI/IEEE** standards.
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## Key Features That Resonate with B2B Buyers
### ✅ Low No‑Load & Load Losses – Lower OPEX
Grain‑oriented silicon steel core with step‑lap joints 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.
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## Production Capacity & Delivery Capability – Your Supply Chain Advantage
| Capability | Our Standard |
| :— | :— |
| **Monthly production capacity** | 300+ units (up to 3150kVA) |
| **Standard lead time (ex‑works)** | 20–30 days (depending on quantity) |
| **Fast‑track lead time** | 12–18 days for urgent projects |
| **Batch size flexibility** | From single units to 100+ 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.
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## Technical Specifications (Reference – S11 Series)
| Rated Power (kVA) | HV (kV) | LV (kV) | Vector Group | No‑Load Loss (W) | Load Loss (W) | Impedance (%) |
| :— | :— | :— | :— | :— | :— | :— |
| 200 | 33 | 0.4 | Dyn11 / Yyn0 | ~480 | ~2850 | 4.0–6.5 |
| 500 | 33 | 0.4 | Dyn11 / Yyn0 | ~680 | ~5410 | 6.0–8.0 |
| 800 | 33 | 0.4 | Dyn11 / Yyn0 | ~980 | ~7500 | 6.5 |
| 1250 | 33 | 0.4 | Dyn11 / Yyn0 | ~1360 | ~12000 | 6.5 |
| 2000 | 33 | 0.4 | Dyn11 / Yyn0 | ~1950 | ~19140 | 6.0–8.0 |
**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.
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## Where Our 33/0.4kV Transformers Are Working Right Now
– Rural electrification projects (Africa, Southeast Asia, South America)
– Factory power distribution (Vietnam, Indonesia, Nigeria)
– Shopping mall & hospital backup systems
– Solar farm step‑down stations
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## Common Customer Questions (We Answer Fast)
**Q: Can you supply 100 units within 25 days?**
A: Yes – our monthly capacity exceeds 500 units. We regularly fulfill large‑batch orders without delaying other customers.
**Q: Do you provide test reports before shipment?**
A: Absolutely. Routine tests (IEC/ANSI) are included. Type tests or witnessed tests available upon request.
**Q: What if I need a non‑standard impedance or vector group?**
A: We customize to your local grid requirements – just send your spec sheet.
**Q: Do you ship to remote project sites?**
A: Yes – we work with major freight forwarders and can arrange inland delivery to your site.
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## Ready to Secure Your Transformer Supply Chain?
**Stop searching. Start building.**
Send us your technical requirements:
– Rated power (kVA)
– Voltage ratio (33/0.4kV standard – other ratios available)
– Vector group (Dyn11 / Yyn0 / others)
– Quantity and target delivery date
📩 **Request a quote →**
📞 We respond within **24 business hours** with pricing, lead time, and engineering datasheet.
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