SG (B) 10 Series Non Encapsulated Coil

Product model description

Product Overview

Our three-phase dry-type Power Transformers utilize UL-recognized NOMEX® insulation systems for non-encapsulated windings, delivering superior safety, reliability, energy efficiency, fire/explosion resistance, and minimal maintenance requirements.

Featuring advanced engineering with optimized structural design and aesthetic appearance, these units exceed domestic standards in key performance metrics including:

Partial discharge levels

No-load & load losses

Noise emission

High humidity tolerance

Ideal for demanding installations:

✔ Coastal/lakeside environments with high humidity & contamination

✔ High-fire-risk areas with heavy loads

✔ Critical facilities:

High-rises/Airports/Transport hubs

Hospitals/Power plants/Metallurgical sites

Shopping centers/Dense residential areas

Petrochemical/Nuclear facilities

Key Features

Zero Partial Discharge

Precision-engineered winding structure

Vacuum impregnation process eliminates:

• Partial discharge throughout lifespan

• Insulation cracking/degradation

Short-Circuit Resilience

HV: Layer-wound continuous windings

LV: Foil-wound construction

Vacuum-impregnated & ceramic-supported

Withstands 25× rated current (IEC 60076-11)

Fire Safety Excellence

Self-extinguishing (UL94 V-0)

Non-toxic smoke emission (<1% opacity at 800°C)

Flame-retardant to IEEE 383 Class F

Thermal Performance

Class H (180°C) insulation

Ultra-thin uniform insulation layers

Overload capacity:

• Continuous: 120% rating

• Emergency: 140% for 3 hours

Instant full-load startup at -50°C to +50°C

Operating Conditions

Ambient temperature: -50°C to +50°C

Altitude:<1000m ASL

Custom specifications available upon consultation

*Note: All NOMEX®-based insulation materials demonstrate<0.1% aging after 100,000 thermal cycles per UL 1446 testing.

Compliance Standards:

• IEC 60076-11 • UL 5085 • GB 1094.11

Third-party test reports available for all claimed performance parameters.