Three Phase Epoxy Resin Cast Dry Type Scb Series 6kv 10kv Distribution

The numeric suffix indicates the energy efficiency tier under GB 20052-2024: SCB18 = Level 1 (highest), SCB14 = Level 2, SCB12 = Level 3. Taking a 1250 kVA unit as reference, SCB18 cuts no-load loss by approximately 15% versus SCB14 and 28% versus SCB12. For continuous-duty applications, the higher first-cost of SCB18 is typically recovered through electricity savings within a few years.

Dry type transformers use epoxy resin insulation instead of flammable mineral oil, eliminating fire hazards and oil leakage risks. They are flame-retardant, self-extinguishing, and produce no toxic gases. This makes them preferred or mandatory for indoor installations, high-rise buildings, hospitals, metro stations, and data centers where fire safety codes prohibit oil-filled equipment.

Class F insulation serves as the standard for general distribution projects. Class H insulation is advised for environments with elevated ambient heat, frequent heavy cycling loads, or areas lacking proper ventilation. Both adopt vacuum epoxy casting construction, while Class H features extra thermal buffer to withstand harsh operating scenarios.

AN (Air Natural) uses natural convection for continuous rated load. AF (Air Forced) engages fans to boost capacity by 30%-50% for short-duration peaks. For applications with predictable load spikes - motor starting, industrial cycles, or data center failover - the AN/AF dual-mode allows selecting a smaller rated unit without sacrificing peak performance.

IP20 is standard for clean, dry indoor environments. IP23 adds drip protection for condensation-prone areas. IP31 or higher suits dusty or semi-outdoor installations. For corrosive or coastal environments, custom enclosures up to IP54 with anti-corrosion coatings are available.