Hermetically Sealed 250KVA 315KVA Three-Phase Oil Immersed Step-Down Distribution Transformer
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, ...
Hermetically Sealed Oil Immersed Transformer
,250KVA Step-Down Distribution Transformer
,315KVA Three-Phase Power 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.
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Hermetically Sealed Design
- Prevents moisture ingress, oxidation, and oil leakage
- Extends transformer lifespan and reduces maintenance frequency
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High Reliability & Performance
- Suitable for continuous operation under full load
- High short-circuit withstand capability ensures equipment protection
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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
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Robust Construction
- High-quality laminated core and copper/aluminum windings
- Durable tank and conservator to withstand mechanical and thermal stress
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Environmentally Friendly
- Reduced oil evaporation and leakage
- Compliant with international safety and environmental standards
| 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 |
- 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
- No silica gel replacement
- No oil filtration required
- Minimal inspection during service life
- No moisture ingress
- Significantly reduced oil oxidation
- Stable dielectric strength over time
- Excellent performance in hot, humid, and dusty climates
- Suitable for coastal, mining, and industrial areas
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 |
| Regional Pain Point | 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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