SC(B)13 Three-Phase Epoxy Resin Vacuum Cast-Resin Dry-Type Distribution Transformer 10kV/0.4kV 50~2500kVA

C(B)13 Epoxy Resin Cast-Resin Dry-Type Transformer

The SC(B) series epoxy resin cast-resin dry-type transformer is manufactured with advanced equipment and technology originally introduced from Germany, with optimized design. The SCB13 is a three-phase epoxy-resin vacuum-cast, foil-wound dry-type distribution transformer — an oil-free, new-generation high-efficiency product upgraded from the SCB11. It is flame-retardant, explosion-proof and pollution-free, with low partial discharge, high mechanical strength, strong short-circuit withstand capability and excellent environmental adaptability. The series has passed inspection and testing by national-level quality supervision authorities and obtained PCCC product certification and energy-saving product certification.

Model Designation

S — Three-phase　|　C — Epoxy resin cast　|　B — LV foil winding　|　13 — Energy-efficiency designation

Product Overview

The SCB13 typically operates at 10kV/0.4kV with capacities from 50 to 2500kVA, insulation class F (thermal class up to H), compliant with GB 20052-2020 Level-2 energy-efficiency standard. HV and LV coils are integrally cast in epoxy resin under vacuum pressure; the core uses high-permeability cold-rolled silicon steel with fully-mitred step-lap joints; a smart temperature-control system is provided, with natural air cooling (AN) or forced air cooling (AF) optional. It is widely used in high-rise buildings, underground substations, hospitals, data centers, metros, commercial complexes and industrial parks — indoor sites with dense occupancy and strict fire-safety requirements.

Construction Features

• Core: High-grade grain-oriented silicon steel, 45° fully-mitred seven-step lap stacking — effectively reduces no-load loss, no-load current and noise;
• Winding Process: HV winding in sectioned cylindrical copper wire; LV winding in foil for uniform heat dissipation and strong short-circuit withstand; pressurized vacuum epoxy casting gives dense, void-free curing with extremely low partial discharge (≤10 pC);
• Cooling & Temperature Control: Built-in winding temperature sensors with a smart temperature controller featuring display, over-temperature alarm, trip and automatic fan start/stop; axial cooling ducts reserved in windings allow short-time overload under forced air cooling;
• Enclosure: IP20 metal enclosure as standard (IP23 optional), preventing contact with live parts and ingress of foreign objects, with ventilation louvres retained;
• Insulation: Epoxy resin + glass-fiber composite insulation, flame-retardant and self-extinguishing with no toxic fumes at high temperature; moisture-proof, mildew-proof, dust-resistant and salt-fog resistant — suitable for humid, underground and harsh environments.

Core Advantages

• High Efficiency, Energy Saving: Compared with SCB11, no-load loss reduced by approx. 20% and load loss by approx. 10% — lower long-term electricity costs, ideal for continuously operating distribution projects;
• Fire-Safe, Explosion-Proof and Eco-Friendly: No transformer oil — no risk of oil leakage, fire or explosion; the flame-retardant resin body leaks no pollutants under fault conditions, allowing installation at load centers, basements and inside buildings;
• High Reliability, Strong Short-Circuit Withstand: Integral casting gives rigid coils that withstand huge short-circuit electrodynamic forces; low partial discharge and stable insulation minimize inter-turn breakdown failures;
• Low Noise: Optimized core joints and clamping structure — significantly quieter than conventional dry-type transformers, suitable for offices, hospitals and residential areas;
• Maintenance-Free, Simple O&M: Oil-free — no periodic oil filtering or replacement; only routine visual inspection required, greatly reducing maintenance cost and downtime;
• Compact and Easy to Install: No conservator or oil tank — lightweight with a small footprint; can be placed directly next to switchgear indoors, simplifying civil works and shortening construction periods;
• Strong Environmental Adaptability: Moisture-proof, dust-proof, heat- and humidity-resistant, anti-condensation — suitable for underground substations, coastal salt-fog areas and dusty plants.

Technical Parameters (standard configuration; final values per factory technical documents)

Standards Compliance

GB 1094GB/T 10228JB/T 3837GB 20052-2020 Level-2 Efficiency

Applications

High-rise buildings, underground substations, hospitals, data centers, metro and rail transit, commercial complexes and industrial parks — indoor distribution sites with dense occupancy and strict fire-safety requirements.

Contact us for a quotation and customized solution (OLTC versions available on request).