Hermetically Sealed 250KVA 315KVA Three-Phase Oil Immersed Step-Down Distribution Transformer
Price:
Negotiable
MOQ:
Negotiable
Delivery Time:
Negotiable
Product Description
Hermetically Sealed Oil-immersed 250KVA 315KVA Three-Phase Oil-Immersed Step-Down Distribution Transformer
Our 250kVA and 315kVA three-phase oil-immersed step-down distribution transformers are hermetically sealed to ensure long-term reliability and minimal maintenance. Designed for industrial, commercial, and municipal power distribution, these transformers deliver stable and efficient power while providing excellent protection against environmental factors.
Key Features & Benefits
-
Hermetically Sealed Design
- Prevents moisture ingress, oxidation, and oil leakage
- Extends transformer lifespan and reduces maintenance frequency
-
High Reliability & Performance
- Suitable for continuous operation under full load
- High short-circuit withstand capability ensures equipment protection
-
Efficient Step-Down Transformation
- Converts medium voltage to low voltage for industrial, commercial, or residential use
- Stable voltage output ensures optimal operation of downstream equipment
-
Robust Construction
- High-quality laminated core and copper/aluminum windings
- Durable tank and conservator to withstand mechanical and thermal stress
-
Environmentally Friendly
- Reduced oil evaporation and leakage
- Compliant with international safety and environmental standards
Product Specifications
| Specification | Details |
|---|---|
| Model Number | S13 |
| Brand Name | HENTG POWER |
| Place of Origin | Jiangsu, China |
| Type | Oil-Immersed Transformer, Dual Winding Transformer |
| Application | Power Transformer |
| Winding Material | 100% Copper/Aluminum |
| Vector Group | Dyn11 / Yyn0 |
| Capacity | 250KVA 315KVA |
| Warranty | 12 months |
| Certification | ISO CE |
Construction Features
- Coil Number: Two Windings, Three Windings, Single Winding
- Coil Structure: Shell-Type Coil, Layer Coil, Fully Sealed Construction, Disc Coil, Round Coil
- Type: Oil Immersed Distribution Type
- Hermetically sealed design for enhanced protection
Core Advantages
✔ Maintenance-Free Operation
- No silica gel replacement
- No oil filtration required
- Minimal inspection during service life
✔ Enhanced Insulation Reliability
- No moisture ingress
- Significantly reduced oil oxidation
- Stable dielectric strength over time
✔ Superior Environmental Adaptability
- Excellent performance in hot, humid, and dusty climates
- Suitable for coastal, mining, and industrial areas
✔ Lower Total Cost of Ownership
Although the initial investment may be slightly higher than conventional designs, the life-cycle cost is significantly reduced due to minimal maintenance and extended service life.
Hermetically Sealed vs. Conservator Type – Quick Comparison
| Item | Hermetically Sealed Type | Conservator Type |
|---|---|---|
| Oil system | Fully sealed | Oil tank + conservator |
| Air contact | None | With ambient air |
| Breather | Not required | Required |
| Moisture ingress risk | Very low | Medium to high |
| Oil aging speed | Very slow | Faster |
| Maintenance | Maintenance-free | Periodic maintenance |
| Suitability for hot & humid areas | Excellent | Moderate |
| Reliability | ⭐⭐⭐⭐⭐ | ⭐⭐⭐ |
| Service life | Longer | Standard |
| Typical application | Distribution & industrial | Large substations |
Challenges & Solutions
Tailored for Africa & Latin America
| Regional Challenge | Conventional Problem | Our Solution |
|---|---|---|
| High ambient temperature | Accelerated oil aging | Sealed oil system prevents oxidation |
| High humidity & rainfall | Moisture contamination | Airtight design eliminates air ingress |
| Dusty / polluted environment | Breather clogging | No breather required |
| Limited maintenance capability | Frequent servicing needed | True maintenance-free operation |
| Remote installation locations | High O&M costs | Reduced inspection and service |
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Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.
Company
Hunan Hentg Power Electric Technology Co., Ltd.
Location
Room905, D6 building, CCSP Industrial Park, Yuelu District, Changsha，Hunan province, China
Contact Person
Ms. Laurel