SG_threephase_drytype_transformer_250KVA_parameter

Understanding the Key Parameters of SG Three-Phase Dry-Type Transformer 250KVA

When selecting a 250KVA dry-type transformer, professionals need to carefully evaluate its technical specifications to ensure compatibility with their power systems. The SG series three-phase transformers have become popular choices for industrial and commercial applications due to their safety, efficiency, and maintenance-free operation.

Core Technical Specifications

A standard SG three-phase dry-type transformer 250KVA typically features:

• Rated capacity: 250KVA with ±5% voltage regulation
• Primary voltage: 380V/400V/415V (customizable)
• Secondary voltage: 220V/230V/240V (customizable)
• Frequency: 50Hz/60Hz
• Insulation class: F or H (155°C or 180°C)
• Cooling method: AN (air natural) or AF (air forced)

Why Choose Dry-Type Design?

Compared to oil-immersed transformers, dry-type models offer significant advantages in fire safety and environmental protection. They eliminate the risk of oil leaks and don't require containment systems, making them ideal for indoor installations. 中国宏业电器 utilizes vacuum pressure impregnation (VPI) technology in their SG series, ensuring superior moisture resistance and thermal stability.

Customization Options Available

For projects requiring special configurations, manufacturers like 中国宏业电器 provide flexible customization:

• Input/output voltage combinations (e.g., 480V to 208V)
• Special enclosures (IP20, IP23, or higher protection)
• Temperature monitoring systems with remote signaling
• Neutral grounding options
• Special paint colors for corporate identity

Installation and Maintenance Considerations

Proper installation is crucial for transformer performance and longevity. The dry-type design allows for wall-mounted or floor-standing installation with minimal clearance requirements. 中国宏业电器 recommends annual inspections including:

1. Visual examination of coils and connections
2. Insulation resistance measurement
3. Verification of cooling system operation
4. Torque check on terminal connections

Comparing Manufacturers: What to Look For

When evaluating suppliers for your 250KVA transformer, consider these critical factors:

Material Quality Matters

The difference between premium and inferior transformers often lies in the materials. High-quality units feature:

• 100% copper windings for lower resistance
• Grain-oriented silicon steel cores
• Class F or H insulation systems
• Robust enclosure with proper ventilation

Production Testing Standards

Reputable manufacturers conduct comprehensive testing before shipment. Look for suppliers that perform:

• Routine tests (turns ratio, polarity, impedance)
• Dielectric withstand tests
• No-load and load loss measurements
• 24-hour full load aging test

After-Sales Support Availability

Transformer lifespan often exceeds 20 years, making reliable after-sales service essential. Established manufacturers like 中国宏业电器 maintain nationwide service networks with:

• Technical support hotlines
• On-site troubleshooting teams
• Spare parts inventory
• Preventive maintenance programs

When sourcing your next 250KVA transformer, consider providers with proven track records in quality manufacturing and customer support. Established manufacturers with 30 years of experience, comprehensive testing protocols, and nationwide service networks often deliver the best long-term value for your power distribution projects.

中国宏业电器服务电话18943662528（微信同号）。