Hermetically Sealed Oil-immersed 250KVA 315KVA Three-Phase Oil-Immersed Step-Down Distribution Transformer
HENTG POWER Hermetically Sealed Oil-immersed Distribution Transformer
Our 250kVA and 315kVA hermetically sealed oil-immersed distribution transformers are designed for dependable medium-voltage to low-voltage power delivery. The sealed tank structure eliminates oil leakage risks, improves heat dissipation, and ensures long-term stability even in harsh environments such as high temperature, humidity, and dust.
These three-phase step-down transformers are widely used in utilities, commercial facilities, industrial plants, rural electrification projects, and renewable energy systems. They feature low-loss core materials, high mechanical strength windings, and high-performance insulating oil to guarantee excellent efficiency and extended service life. 
Our Advantages
Type S13 Oil-Immersed Distribution Transformer Features
The Type S13 oil-immersed distribution transformer is widely used in residential areas, commercial centers, industrial parks, and rural electrification projects. Compared to S9 or S11, the S13 offers several improvements:
- Higher Energy Efficiency: Lower no-load loss (20-30% reduction compared to S11) and lower load loss through improved winding structure and materials.
- Improved Temperature Rise Performance: Enhanced oil circulation and cooling systems maintain stable operation under load, extending insulation life.
- Reduced Noise Levels: High-permeability silicon steel and precision manufacturing lower magnetostriction for quieter operation.
- Robust Mechanical Design: Optimized winding structure improves short-circuit resistance and reduces vibration.
- Longer Service Life: Superior materials and structural improvements enable 20-30 years of service under proper conditions.
Product Drawing
Consulting Process
Step 1: We respond to inquiries within 1 hour, providing suitable transformer recommendations, reasonable quotations, and payment terms. Our technical team confirms all drawing details within 7 days after payment.
Step 2: After finalizing production drawings, we conduct quality inspections and provide QC/test reports. Raw materials are strictly screened for quality assurance.
Step 3: We offer professional installation guidance and on-site support, along with a 2+ year warranty service.
Contact us for more information Why Choose Us
- 30+ senior engineers providing 24/7 technical support with 30-minute response time
- 100,000 m² factory with 250 skilled workers and 30+ engineers
- 4 production lines with 10,000+ units annual capacity
- 100% quality control testing with 25 detection points
- 15 years of transformer design and production experience
- Compliance with GB 20052-2024/ANSI/IEEE/DOE2016/CSA/IEC60076 standards
- Global on-site technical support
Company Profile
HENTG Power is an ISO9001 certified transformer manufacturer specializing in reliable, high-performance solutions for global power systems since 2011.
With a 100,000 m² factory, over 250 skilled workers, 30+ senior engineers, and 10+ professional testing engineers, we deliver high-quality transformer solutions with strong production capacity of 20,000 units/year.
Our products comply with GB 20052-2024 and IEC 60076 standards, serving global markets across various applications including dry transformers, oil immersed transformers, substations, switchgear, and distribution boxes.
Patents and Certificates
Customer Photos
FAQ
Q: Who are we?
HENTG POWER is a professional designer, manufacturer and installer of power system solutions worldwide, founded in 2011 with a 100,000 m² facility.
Q: How can we guarantee quality?
We conduct pre-production samples, final inspections before shipment, and provide QC & test reports. We accept Factory Acceptance Tests (FAT) and offer 2+ years warranty service.
Q: Why choose us?
We have professional drawing and technical teams that confirm all drawing details within 7 days, with 30+ senior engineers providing 24/7 support and 30-minute response time.
Q: What services can we provide?
We accept OEM orders and negotiate business payment terms to meet customer requirements.
