HJ-ODT Series Hermetically Sealed Oil Transformer
Up to 35kV / 50kVA – 2500kVA / Global Voltage Matching
The HJ-ODT Series Hermetically Sealed Oil Transformer is the highly reliable, cost-effective backbone of global power distribution. Utilizing an advanced fully-sealed corrugated tank design, it completely isolates the insulating oil from the atmosphere, rendering the unit virtually maintenance-free. With our flexible manufacturing capabilities, we precisely match the transformer’s voltage ratings to your specific national grid standards, delivering IEC-compliant performance at an exceptional value.
Ideal for General Power Distribution:
- ✓ Utility Overhead & Underground Distribution Networks
- ✓ General Manufacturing & Industrial Facilities
- ✓ Residential Communities & Commercial Complexes
- ✓ Agricultural & Rural Electrification Projects
1. Global Voltage Matching & Bespoke Customization
We leverage the vast maturity of China's electrical manufacturing platforms to serve your local grid. Whether your target market operates on 11kV, 13.8kV, 20kV, 22kV, 33kV, or 34.5kV, we seamlessly adapt our core 10kV/35kV engineering architectures to precisely match your national standards. From custom tap changers to specific vector groups (e.g., Dyn11, Yyn0), we deliver a bespoke solution that integrates flawlessly into your infrastructure.
2. Hermetically Sealed & Maintenance-Free
The HJ-ODT eliminates the need for a traditional oil conservator. The corrugated cooling fins dynamically expand and contract to accommodate changes in oil volume due to temperature fluctuations. This hermetic seal completely prevents oxygen and moisture from contaminating the insulating oil, ensuring a prolonged lifespan with virtually zero routine maintenance.
3. High-Efficiency Core & Winding Design
Engineered for minimal energy loss. The magnetic core is constructed from premium cold-rolled grain-oriented silicon steel sheets, drastically reducing no-load losses. High-purity oxygen-free copper windings ensure exceptional short-circuit withstand capability and superior thermal dissipation during peak load cycles.
4. Robust Anti-Corrosion Treatment
Designed to survive decades of outdoor exposure. The corrugated tank undergoes a stringent multi-stage surface preparation process, followed by electrostatic powder coating and high-temperature curing. This marine-grade finish provides outstanding resistance to rust, UV degradation, and harsh weather conditions.
Global Factory Acceptance & Turnkey Support
Every HJ-ODT transformer undergoes comprehensive routine testing strictly compliant with IEC 60076 standards, including applied voltage, induced overvoltage, and precise loss measurements. We provide detailed FAT reports and offer flexible shipping configurations to ensure safe and economical delivery to your global project sites.
Performance Matrix & Technical Specifications
(Note: The matrix below outlines our standard capacities up to 2500kVA. Specific voltages, vector groups, and efficiency tiers are fully customizable to meet your local utility requirements.)
| Parameter / Rated Power | 50kVA | 250kVA | 500kVA | 1250kVA | 2500kVA |
|---|---|---|---|---|---|
| Primary Voltage | Up to 35kV (e.g., 10kV, 20kV, 35kV) | ||||
| Secondary Voltage | 0.4kV / 0.415kV / 0.433kV / 0.480kV | ||||
| Cooling Mode | ONAN | ONAN | ONAN | ONAN | ONAF / ONAN |
| Typical Impedance (%) | 4.0% | 4.0% | 4.0% | 5.0% | 6.0% |
| Vector Group | Dyn11 / Yyn0 / Custom Configurations | ||||
| Tap Changer Type | Off-Circuit (OCTC) / On-Load (OLTC) optional | ||||
| Insulation Level (LI/AC) | LI 75 AC 28 / LI 170 AC 70 / LI 200 AC 85 (Depends on voltage) | ||||
| Compliance Standards | IEC 60076 / ANSI / IEEE C57.12 | ||||
Standard Operating Environment
- Ambient Temperature: -25°C to +40°C.
- Altitude: Standard ≤ 1000m (Customizable for high-altitude environments).
- Installation Type: Indoor or Outdoor (Pole-mounted or Pad-mounted).
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