2500 Kva Oil Filled Corrugated Full-sealed Transformer

Hermetically Sealed Oil Transformer Technical Overview

Core Design Features:

1. Sealing System

• Rectangular corrugated oil tank with cork rubber sealing

• Fully sealed construction (no conservator tank)

• Thermal expansion managed through corrugated plate elasticity

2. Magnetic Circuit

• Oval-section winding and core structure

• Reduced core column width and yoke height

• Benefits: Shortened magnetic path, decreased iron weight, lower core losses

3. Structural Advantages

• Compact footprint (30-40% space savings vs. conventional units)

• Reduced total weight (15-25% lighter than open-type equivalents)

Performance Characteristics:

Application Matrix:

1. Underground Power Distribution

• Ideal for: Subway systems, urban underground grids

• Key benefit: Resists 100% humidity and particulate contamination

• Installation: Can operate at 45° tilt in confined vaults

2. Hazardous Industrial Sites

• Compliance: ATEX Zone 1/2, NEC Class I Div 2

• Protection: Withstands corrosive chemicals (pH 2-12 range)

• Safety: Eliminates ignition sources in explosive atmospheres

3. Marine & Offshore

• Certifications: DNV-GL, ABS, Lloyd's Register

• Durability: Vibration resistance to 0.5g @ 2-100Hz

• Corrosion: Salt spray tested per ISO 9227 (3000+ hours)

4. Mission-Critical Facilities

• Availability: 99.999% uptime in hospital/data center applications

• Fire Safety: UL94 V-0 rated materials

• Redundancy: Parallel operation capable with <5% circulating current

Technical Specifications:

• Voltage Range: 11kV to 132kV

• Capacity: 50kVA to 30MVA

• Temperature Range: -40°C to +50°C ambient

• Noise Level: <55dB at 1m (35kV class)

• Service Life: 35+ years with proper maintenance

Selection Guidelines:

1. For flood-prone areas: Specify submarine cable termination compatibility

2. In seismic zones: Require 0.3g earthquake certification

3. For tropical climates: Add anti-fungal treated insulation