Complete list of SG three-phase dry-type transformer model parameters

Understanding SG Three-Phase Dry-Type Transformers

When it comes to industrial power distribution,MNS switchgear cabinet 、GCK switchgear cabinet manufacturer SG three-phase dry-type transformers are among the most reliable solutions for safe and efficient voltage conversion. Unlike oil-filled transformers, these units use air as the cooling medium, making them ideal for indoor installations where fire safety is a priority. At China Hongye Electric, we've been manufacturing these transformers for over 20 years, serving more than 10,000 industrial clients across various sectors.

The SG series stands out for its compact design and maintenance-free operation. These transformers typically feature:

• Primary voltage range: 380V-35kV
• Secondary voltage options: 220V, 400V, 690V, etc.
• Capacity range: 50kVA to 2500kVA
• Insulation class: F or H (180°C or 220°C)

What makes SG transformers different from SCB types?

Many clients ask about the difference between SG and SCB transformers. While both are dry-type, SG models use epoxy resin cast coils for better protection against moisture and contaminants, making them suitable for harsh environments. SCB transformers typically have open-wound coils and are more cost-effective for standard applications.

Complete Model Parameter Breakdown

China Hongye Electric's SG transformer series includes multiple models to meet different application needs. Here's a comprehensive list of key parameters:

Standard Technical Specifications

• Cooling method: AN/AF (natural/forced air cooling)
• Frequency: 50Hz/60Hz
• Vector group: Dyn11, Yyn0, or custom
• Temperature rise: ≤100K (for F class)
• Noise level: ≤65dB (at 1m distance)

Protection and Safety Features

All our SG transformers undergo full factory testing including:

1. Impulse voltage withstand test
2. Partial discharge measurement
3. Temperature rise test under full load
4. Short-circuit withstand capability test

Customization Options and Special Configurations

As a manufacturer with in-house production capabilities, China Hongye Electric offers extensive customization for SG transformers:

Non-standard requirements we can accommodate

• Special voltage ratios (e.g., 660V/575V)
• Higher protection levels (up to IP54)
• Custom tap changers (on-load or off-circuit)
• Special enclosures for corrosive environments

For OEM clients, we provide complete private label solutions including custom nameplates and packaging. Our engineering team works closely with clients to ensure the transformer meets specific equipment requirements.

Installation Considerations and Maintenance

Proper installation is crucial for optimal transformer performance. Key factors to consider include:

• Minimum clearance distances (typically 300-500mm around the unit)
• Ventilation requirements (important for AF cooling mode)
• Foundation strength (check our installation manual for exact figures)

Maintenance is minimal but should include regular:

1. Visual inspections for dust accumulation
2. Thermal scans of connections
3. Insulation resistance measurements

Why Choose China Hongye Electric for Your Transformer Needs

With two decades of experience in power equipment manufacturing, we offer:

• Direct factory pricing (no middlemen)
• 54 product categories across 9 major series
• Three-year warranty with full technical support

Our engineers are available weekdays 9:00-18:00 to help with selection, installation guidance, and troubleshooting. Whether you need standard models or custom solutions, we have the expertise to deliver reliable power distribution equipment.

Platform service phone18943662528 (WeChat: vip1806130).