EC Insulator Jiangxi Co., Ltd. is one of the most reliable manufacturers and suppliers of hermetically sealed oil filled transformer in China. With abundant experience, we are committed to offering high quality custom service. Please feel free to wholesale premium hermetically sealed oil filled transformer made in China here from our factory.
Product Introduction
The hermetically sealed oil filled transformer adopts fully sealed structure without oil conservator. Corrugated tank compensates volume variation of insulating oil via elastic deformation under temperature fluctuation.
Insulating oil is completely isolated from ambient air, effectively preventing oil oxidation and moisture penetration. Stable dielectric performance and extended service life.
The transformer features compact layout, low noise, low partial discharge and minimal maintenance. Suitable for urban power grids, industrial parks and areas with heavy dust or high humidity.
Compliant with relevant IEC and GB standards.
1. Product Classification
1.1 According to Rated Capacity
15KVA, 30kVA, 45kVA, 75kVA, 112.5kVA, 150kVA, 225kVA, 300kVA, 500kVA
Larger non-standard capacities can be customized.
1.2 According to Voltage Level
13.2kV series
23kV series
33kV series
1.3 According to Energy Efficiency Grade
Standard efficiency type
High energy-saving type
Ultra-low loss type (specially for photovoltaic & new energy projects)
1.4 According to Application Environment
- General outdoor type
- Coastal salt-fog resistant type
- High altitude adapted type
- Dust & corrosion resistant type for mines and heavy industry
Corrugated tank hermetically sealed transformer (most common)
Compact type for container & box substation
Low noise optimized type
Anti-explosion enhanced type
Product Features
2.1 Fully Sealed & Maintenance-Free
2.2 Low Loss & High Energy Efficiency
2.3Superior Insulation & High Safety
2.5 Low Noise & Stable Operation
2.6 Compact & Easy Installation
2.7Long Service Life
Materials
- Core: Low-loss cold rolled oriented silicon steel
- Winding: High purity oxygen-free copper conductor
- Insulation: High-density insulating pressboard & insulating paper
- Tank: Thick carbon steel plate with anti-rust coating
- Sealing components: Oil-resistant aging-proof rubber
- Filling liquid: High stability insulating mineral oil
Appearance & Design
Integral fully welded corrugated tank without conservator. The corrugated wall automatically compensates oil volume expansion. Outer surface of hermetically sealed oil filled transformer
adopts electrostatic anti-corrosion spraying. Neat HV/LV terminal layout, equipped with lifting lugs and fixed mounting base.
Technical Parameters
|
Capacity |
30kVA–2500kVA |
|
Rated Voltage |
10/0.4kV, 20/0.4kV, 35/0.4kV customizable |
|
Frequency |
50Hz / 60Hz |
|
Cooling Type |
ONAN |
|
Insulation Class |
Class A |
|
Design Service Life |
≥20 years |
|
Standards |
IEC 60076, GB/T 6451 |
OEM & Custom Service
We support flexible OEM & ODM customization.
Customizable options: voltage ratio, capacity, connection group, external coating color, nameplate logo, overall dimension and special environmental reinforcement design.
Quality Control
- Raw Material Inspection: All raw materials are tested before incoming storage.
- In-process Monitoring: Strict inspection for core stacking, winding, welding and vacuum oil filling.
- Finished Product Full Test: Every unit undergoes transformation ratio, DC resistance, withstand voltage, partial discharge and air tightness test before delivery.
- We provide relevant test reports upon request.
After-sales Support
- Technical guidance: We supply remote guidance for installation, commissioning and routine troubleshooting.
- Warranty: Standard warranty period is available for all finished transformers.
- Spare parts support: Quick supply of matching spare parts for long-term cooperation clients
Other Information
◆ Application Fields
Widely used in photovoltaic power station, power grid distribution, box substation, industrial & mining enterprises, municipal engineering and overseas new energy projects.
◆ Packing & Shipment
Standard export fumigated wooden pallet packaging. Shockproof protection to avoid oil leakage and damage during sea transportation.
FAQ
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