SCB14-NX2 series dry-type power transformers are new-generation energy-saving products developed based on the mature SCB13 platform. By optimizing the core structure, winding design and manufacturing process, the core performance is greatly improved with better energy efficiency.
Advanced Core: SCB14 features high-grade grain-oriented silicon steel with a precision 45° full-slope 7-step lap joint design. It delivers lower no-load loss, reduced no-load current, lower vibration and noise, and optimized flux distribution.
Premium Coils: The HV winding uses a vacuum-cast multi-layer segmented cylindrical design, ensuring void-free insulation and ultra-low partial discharge. The LV foil winding offers strong short-circuit withstand, uniform current distribution, and efficient cooling via longitudinal air ducts, and can be re-energized without pre-drying after shutdown.
Safe & Maintenance-Free: Fully dry-type and self-extinguishing, it presents zero leakage and no fire risk. With high creepage distance and 100% humidity tolerance, it runs reliably in humid environments. No oil checks, replacement or filtration are ever needed — only periodic dust cleaning, sharply cutting lifetime operating costs.
Flexible Protection: Available in IP20, IP23, IP30 and IP31 grades to suit general indoor, splash-prone and enhanced-protection installations.
Smart Temperature Control: Embedded PT100/PT1000 sensors monitor 3-phase winding temperatures in real time, with hottest-phase tracking, over-temperature alarm and trip protection, automatic fan control, and RS485 remote monitoring for SCADA integration.

Code | Meaning |
S | Three-phase |
C | Cast resin (epoxy resin insulation) |
B | Foil-wound low-voltage winding |
14 | Design serial number (higher = better performance) |
-1250/10 | Rated capacity 1250kVA / HV 10kV |
-NX2 | New national Level 2 energy efficiency mark (NX1=L1, NX2=L2, NX3=L3) |
Example: SCB14-1250/10-NX2 → Three-phase cast-resin dry-type transformer, 1250kVA, 10kV primary, Level 2 energy efficiency.
Standard | Description |
GB/T 1094.11 | Power transformers – Dry-type transformers |
GB/T 10228 | Technical parameters & requirements for dry-type transformers |
GB 20052-2020 | Energy efficiency limits and grades for power transformers |
IEC 60076-11 | International standard for dry-type power transformers |
IEC 60076-12 | Loading guide for dry-type power transformers |
Parameter | Standard Value |
Model | SCB14-NX2 |
Rated Capacity | 30 – 3150 kVA |
Primary Voltage | 6 / 10 / 10.5 / 35 kV |
Secondary Voltage | 0.4 / 0.6 / 0.8 / 1.14 kV |
Connection Group | Dyn11 or Yyn0 |
Impedance Voltage | 4% (≤400kVA), 6%–8% (≥500kVA) |
Insulation Class | F (155°C) or H (180°C) |
Partial Discharge | ≤5 pC |
Cooling Method | AN (natural) / AF (forced air) |
Enclosure Protection | IP20 / IP23 / IP30 / IP31 |
Frequency | 50 Hz / 60 Hz |
Winding Temperature Rise | ≤100 K |
Applicable Standards | GB/T 1094.11, GB/T 10228, GB 20052-2020, IEC 60076 |

Parameter | SCB13 Series | SCB14-NX2 Series | Improvement |
Energy Grade | Level 2/3 | New Level 2 (NX2) | Meets strictest 2020 standard |
No-Load Loss | Baseline | Reduced ~10–15% | Lower standing losses |
Load Loss | Baseline | Reduced ~5–10% | More efficient under load |
Noise Level | Baseline | Reduced 5–10 dB(A) | Significantly quieter |
Partial Discharge | ≤10 pC | ≤5 pC | Double the insulation quality |
Insulation Technology | Standard casting | Optimized vacuum casting | Higher reliability |
Government Support | — | Nationally promoted | Eligible for subsidies |
The transformer adapts to harsh industrial conditions. It delivers high reliability for mining and metallurgy with high-level enclosure protection. Its fire-safe and leakage-free design suits chemical and petrochemical plants. It supports long-term continuous operation for cement and textile factories, and provides low-noise, highly stable power for data centers and critical industrial loads.
With compact size, low noise and zero fire risk, it is ideal for high-rise buildings, shopping malls and hotels. It maintains indoor sound comfort below 55 dB(A). Featuring low vibration and safe operation, it fits hospitals, universities and laboratories with sensitive power demands.
Low-noise operation ensures no disturbance in residential areas. It offers vibration resistance and fire safety for rail transit and tunnel applications. It supports 24/7 stable operation for airport safety systems and handles peak power loads in stadiums, exhibition centers and performance venues.
Widely applied in solar and wind power stations, EV charging stations and energy storage systems for power conversion and isolation. It adapts to microgrid and distributed energy scenarios with remote monitoring compatibility. Fully IEC compliant, it is suitable for overseas EPC and various industrial distribution projects.
Quality is the foundation of Tianrun Electric. Zhejiang Tianrun Electric Co., Ltd. (TENRONY) has always honored its commitment to customers of "Strict QC & Professional Testing." Before every product leaves the factory, it must pass a complete set of routine tests — winding resistance and unbalance, voltage ratio and connection symbol, short-circuit impedance and load loss, no-load loss and no-load current, insulation resistance, power-frequency applied voltage, induced voltage, and partial discharge measurement — with a test certificate and factory test report issued for every unit, ensuring that performance is verifiable and data is traceable.
The company manufactures in accordance with national and international standards including GB, IEC 60076 and IEC 60137, and holds ISO 9001 quality management system certification.
For overseas markets, it can also perform all routine tests to international standards such as AS 2374, and customers' representatives or third-party inspection agencies are welcome to witness the factory testing.

The SCB14-NX1 is a three-phase epoxy resin cast dry type transformer designed for indoor medium-voltage power distribution. It combines low-loss design, cast resin insulation and reinforced winding construction for reliable operation in commercial, industrial and infrastructure applications.
Tenrony SCB14-NX1 transformers are available in rated capacities from 30 kVA to 2500 kVA.
The current product data includes primary voltage configurations of 6, 6.3, 10, 10.5 and 11 kV, with typical 0.4 kV secondary voltage.
For transformer selection and quotation, please provide: Rated capacity. Primary voltage. Secondary voltage. Frequency. Vector group. Tapping range. Installation altitude. Ambient temperature. Enclosure requirement. Cooling requirement. Monitoring requirement. Applicable technical standard. Tenrony's engineering team can recommend a suitable SCB14-NX1 configuration according to your project requirements.
Contact us to discuss your power distribution needs and get a customized solution from our expert team.
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Address:
No.788 Wenyi Road, Bihu Town, Lishui City, Zhejiang Province, China