SG(B)10 Non-encapsulated dry type transformer
Brand: Henan Mingkong
Model: SG(B)10
Product Type: Indoor NOMEX Insulated Air-cooled Dry Distribution Transformer
Rated Voltage: High Voltage 10kV / 20kV / 35kV; Low Voltage 0.4kV
Rated Capacity: 250kVA ~ 25000kVA
Core Feature : UL-certified NOMEX H-class insulation, open non-encapsulated coil air cooling structure, fireproof & explosion-proof, zero partial discharge, fully comply with GB6450 & IEC international standards
Key Advantage: Level 10 low energy loss, superior heat dissipation, strong short-circuit withstand capacity, ultra-low noise, 120% long-term overload support, non-toxic self-extinguishing insulation, easy inspection & maintenance, suitable for high humidity & corrosive environments
Application: Coastal power grid reconstruction, industrial substations, mining plants, underground pipe gallery, commercial complexes, new energy energy storage stations, high fire protection required power projects
Introduction
A: Product Overview
SG(B)10 Non-encapsulated dry type transformer is a three-phase power transformer equipped with UL-certified NOMEX insulation system, featuring high safety, stable reliability, low energy loss, fire & explosion resistance and easy maintenance. With optimized layout and compact structure, its core indicators including partial discharge, no-load loss, load loss and noise exceed international standards. It adapts to high-humidity coastal, riverside and heavily polluted sites, ideal for power projects with strict fire protection requirements.
B: Model meaning
This section displays the complete coding rule of SG(B)10 Non-encapsulated dry type transformer. Each letter and number corresponds to fixed technical definitions: S stands for three-phase, G for air-cooled dry type, (B) for low-voltage foil winding, 10 for Class 10 low energy loss, followed by rated capacity and voltage grade for customized configuration matching global high-voltage power grids.
C: Features
- The well-designed coil structure and vacuum impregnation treatment process make the SG(B)10 transformer nopartial discharge, and there is no cracking phenomenon and no insulation level drop during the whole life.
- The high voltage adopts continuous winding, low voltage foil winding, the whole vacuum impregnation and curingtreatment and adopts high-strength ceramic support, which has a good ability to withstand sudden short-circuitcurrent.
- Flame-retardant, flame-retardant, non-toxic, self-extinguishing, and fireproof.
- The transformer is H-class (180° C) insulation.
- The insulating layer is extremely thin and uniform. The short-term overload capacity is extremely strong, withoutforced cooling, 120% long-term overload, 140% overload for 3 hours. Since this insulating material is not aging andelastic, it can be fully loaded immediately at +50°C.
D: Technical Parameters
We provide full standard parameter tables for SG(B)10 Non-encapsulated dry type transformer covering 250kVA to 25000kVA rated capacity. Clear classified data includes no-load loss, load loss under B/F/H three insulation heat resistance grades, and fixed standard short-circuit impedance of 4.0%, 6.0% and 8.0% for different capacity ranges. All performance data complies with GB6450 and IEC international power equipment standards.
E: Buyer Pain Point Solutions
After reviewing the naming rules and performance data of SG(B)10 air-cooled dry transformers, global engineering contractors, factory purchasers and new energy developers mainly hold three core worries, all fully addressed by our standardized technical indicators:
1. Confusion Over Model Codes & Wrong Specification Selection
Many buyers misjudge transformer parameters from vague model marks, causing project delays.
Solution: SG(B)10 naming breakdown diagram
The symbol chart clearly defines each code: S=three-phase, G=dry air cooling, (B)=low-voltage foil winding, 10=Class 10 low loss, plus capacity & voltage suffixes. You can quickly lock the right unit for your 10/20/35kV grid without communication errors.
2. High Power Loss & Rising Long-Term Operating Costs
Conventional dry transformers generate heavy idle & load loss, inflating electricity bills and failing local energy efficiency audits.
Solution: Graded loss data for B/F/H insulation classes
Our parameter table covers 250–2500kVA models with separated loss figures for B(100℃), F(120℃), H(145℃) heat resistance grades. Level 10 low-loss design cuts power waste; pick H-grade for high-temperature mining/underground rooms, B/F for urban grids and commercial complexes. All data meets international standards for energy efficiency filing.
3. Unstable Short-Circuit Impedance & Hidden Safety Hazards
Improper impedance leads to coil burnout and system breakdown during short-circuit surges, risking damage to your PLC, contactors and distribution gear.
Solution: Standardized classified short-circuit impedance
The table specifies fixed 4.0% / 6.0% / 8.0% impedance matching different capacity ranges. Stable anti-surge performance lowers equipment failure and after-sales maintenance expenses.
F: Buyer Value Note
We are a direct exporter of SG(B)10 dry transformers, supplying complete model drawings, parameter sheets and test certificates with every shipment. Custom insulation grades, voltage and capacity combinations are available for commercial, mining and new energy substations, paired with full overseas installation technical support.
Reach our sales team to obtain full datasheets and project quotations.
