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Hermetically Sealed 250KVA 315KVA Three-Phase Oil Immersed Step-Down Distribution Transformer
Hermetically Sealed 250KVA 315KVA Three-Phase Oil Immersed Step-Down Distribution Transformer
Hermetically Sealed 250KVA 315KVA Three-Phase Oil Immersed Step-Down Distribution Transformer
Hermetically Sealed 250KVA 315KVA Three-Phase Oil Immersed Step-Down Distribution Transformer
Hermetically Sealed 250KVA 315KVA Three-Phase Oil Immersed Step-Down Distribution Transformer
Hermetically Sealed 250KVA 315KVA Three-Phase Oil Immersed Step-Down Distribution Transformer
Specifications
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
  1. Hermetically Sealed Design
    • Prevents moisture ingress, oxidation, and oil leakage
    • Extends transformer lifespan and reduces maintenance frequency
  2. High Reliability & Performance
    • Suitable for continuous operation under full load
    • High short-circuit withstand capability ensures equipment protection
  3. 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
  4. Robust Construction
    • High-quality laminated core and copper/aluminum windings
    • Durable tank and conservator to withstand mechanical and thermal stress
  5. 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
Pain Points & Solutions
Tailored for Africa & Latin America
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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Hermetically Sealed 250KVA 315KVA Three-Phase Oil Immersed Step-Down Distribution Transformer

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Hermetically Sealed 250KVA 315KVA Three-Phase Oil Immersed Step-Down Distribution Transformer
Hermetically Sealed 250KVA 315KVA Three-Phase Oil Immersed Step-Down Distribution Transformer
Hermetically Sealed 250KVA 315KVA Three-Phase Oil Immersed Step-Down Distribution Transformer

Hunan Hentg Power Electric Technology Co., Ltd.

Verified Supplier
1 Years
hunan, changsha
Since 2011
Business Type :
Manufacturer
Main Products :
Oil Immersed Transformer, Dry Type Transformer, Compact Substation Transformer
Total Annual :
300-500MVA
Employee Number :
200~250
Certification Level :
Verified Supplier
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