S Series 10kv/20kv Oil-immersed Transformer
- Commodity name： S Series 10kv/20kv Oil-immersed Transformer
Keywords:
Oil-lmmersed Power Transformer
Product Description
S Series 10kV/20kV Three‑Phase Oil‑Immersed Distribution Transformer
Our S‑series (S11/S13/S20/S22) oil‑immersed transformers are designed for 10kV or 20kV, 50Hz AC power systems. They serve as distribution transformers for industrial plants (petroleum, metallurgy, chemical, textile) and sites with heavy dust.
High‑Efficiency Core: Grain‑oriented cold‑rolled silicon steel, full‑oblique step‑lap stacking, multi‑stage stepped circular core, low no‑load loss.
Robust Windings: High‑purity oxygen‑free copper, corrugated oil channels, tight tape binding, non‑impregnated paint; HV side with off‑circuit tap changer (±2×2.5%).
Fully Sealed Tank: Corrugated steel tank, no conservator, vacuum oil filling; compensates oil expansion/contraction, prevents moisture ingress, maintenance‑free.
Safety & Reliability: Pressure relief valve standard; optional gas relay (alarm/trip); strong short‑circuit resistance, long service life.
Compliance: IEC 60076, GB 1094, GB/T 6451.
Details Table
S11-M / S13-M / S20-M / S22-M(Fully Sealed Type, Disconnecting Tap Switch)
|
Parameter |
Unit |
10kV Class |
20kV Class |
Remarks |
|
Rated Capacity |
kVA |
30–2500 |
50–2500 |
Common: 500, 630, 1000, 1600, 2000 |
|
High Voltage (HV) |
kV |
10 |
20 |
±2×2.5% tap range |
|
Low Voltage (LV) |
kV |
0.4 |
0.4 |
0.69 optional |
|
Vector Group |
— |
Yyn0 / Dyn11 |
Yyn0 / Dyn11 |
Default: Yyn0 |
|
No Load Loss (S13) |
W |
170–2700 |
220–3400 |
Lower for S20/S22 |
|
Load Loss (S13) |
W |
810–22600 |
920–24800 |
At rated load, 75°C |
|
No Load Current |
% |
0.6–1.2 |
0.7–1.3 |
≤1.0% typical |
|
Short Circuit Impedance |
% |
4.0 / 6.0 |
6.5 / 8.0 |
4% for ≤1000kVA (10kV) |
|
Cooling Method |
— |
ONAN |
ONAN |
Oil Natural Air Natural |
|
Insulation Level |
— |
10kV: BIL 75kV |
20kV: BIL 125kV |
IEC standard |
|
Tank Type |
— |
Corrugated, fully sealed |
Corrugated, fully sealed |
No conservator, maintenance free |
|
Protection |
— |
Pressure relief valve |
Pressure relief valve |
Gas relay optional |
Packaging and shipping
Zhonggong Steel (SHANDONG) Group Co., Ltd.boasts strong R&D, design and large-scale production capabilities, specializing in the R&D, manufacturing and sales of oil-immersed, dry-type and prefabricated transformers. Benefiting from a prime location and convenient transportation, our factory covers nearly 15,000 square meters.
application
With reliable quality and mature craftsmanship, we rigorously control every production process. We deliver cost-effective, safe and stable transformers and premium services for global clients. Our products are well-sold at home and abroad, enjoying high recognition and trust worldwide.
factory
Equipped with advanced production and precision testing equipment, we have established a sound quality control system and standardized management. With reliable quality and mature craftsmanship, we rigorously control every production process. We deliver cost-effective, safe and stable transformers and premium services for global clients. Our products are well-sold at home and abroad, enjoying high recognition and trust worldwide.
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Dongchangfu District, Liaocheng City, Shandong Province
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