Zhejiang Tenrony Electricity Co., Ltd.
Zhejiang Tenrony Electricity Co., Ltd.

SCB14-NX2Energy Efficiency Dry-Type Power Transformer

  • dry transformer working principle
  • dry type transformer application
  • dry type transformer design
  • dry transformer working principle
  • dry type transformer application
  • dry type transformer design

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.


Features

Features
01

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.


02

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.


03

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.


04

Flexible Protection: Available in IP20, IP23, IP30 and IP31 grades to suit general indoor, splash-prone and enhanced-protection installations.


05

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.


Product Overview

product-overview.jpg


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.


Applicable Standards

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


Technical Specifications


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



specifications.jpg

Performance Comparison: SCB13 vs SCB14-NX2

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


Application Areas

Industrial Sector

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.

Commercial & Civil Buildings

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.

Public Infrastructure

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.

New Energy & General Projects

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.


Transformer Testing

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.

transformer-testing0.jpg



   

FAQs

  • Q

    What is an SCB14-NX1 dry type transformer?

    A

    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.


  • Q

    What capacity range is available for SCB14-NX1 transformers?

    A

    Tenrony SCB14-NX1 transformers are available in rated capacities from 30 kVA to 2500 kVA.



  • Q

    What voltage levels are available?

    A

    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.

  • Q

    What information is required to select an SCB14-NX1 transformer?

    A

    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.

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