China Suppliers Factory SG(B)10 Series 10kV Non-encapsulated Coil Dry Type Power Transformer for Reliable Power Supply

The SG(B)10 series 10kV non-encapsulated coil dry type power transformer is a top-tier three-phase unit, featuring a UL-approved NOMEX insulation system. This transformer is designed for safety, reliability, and energy efficiency, making it an ideal choice for various demanding environments. With its exceptional fire resistance and low maintenance requirements, it stands out among products from other suppliers. The advanced design and optimized structure, combined with low partial discharge levels, reduced no-load and load losses, and minimized noise, ensure high-performance operation even in high-humidity conditions. This versatile transformer is perfect for applications in high-rise buildings, airports, hospitals, power plants, and more. As a leading China factory, we provide superior power solutions that guarantee a stable power supply in any critical setting

Product Details

Type & Meaning

No.	Meaning
1	Three-Phase
2	Dry Type
3	Low-Voltage Foil-Wound Coil
4	Performance Level Code
5	Rated Capacity (kVA)
6	Voltage Class (kV)

Product Features

The carefully designed coil structure and vacuum impregnation process result in low partial discharge for the SG(B)10 transformer, with no cracking or insulation degradation throughout its service life.
The high-voltage side adopts a continuous winding, and the low-voltage side uses foil winding. The whole unit undergoes vacuum impregnation and curing, supported by high-strength ceramic insulators, providing excellent resistance to sudden short-circuit currents.
Flame-retardant, self-extinguishing, non-toxic, and fireproof.
Almost no smoke is generated when the SG(B)10 transformer is burned under high-temperature open flame.
The transformer uses Class H (180°C) insulation, with DuPont NOMEX® paper (Class C) as the main insulation material.
The insulation layer is extremely thin and uniform, enabling strong short-time overload capacity. It can operate at 120% load continuously and 140% load for 3 hours without forced cooling. Thanks to the non-aging and elastic properties of the insulation material, it can immediately carry full load at -50°C.

Product Display

Technical Parameters

Technical Parameters of SG(B)10 Series 10kV Non-Encapsulated Coil Dry-Type Transformers

Rated Capacity (kVA)	Voltage Combination and Tap Range			Connection Symbol	No-Load Loss (W)	Load Loss (W) 145℃	No-Load Current (%)	Short-Circuit Impedance (%)	Main Unit Weight (kg)	Overall Dimensions (mm)		Wheelbase (mm)
Rated Capacity (kVA)	High Voltage (KV)	Tap Changer (%)	Low Voltage (kV)	Connection Symbol	No-Load Loss (W)	Load Loss (W) 145℃	No-Load Current (%)	Short-Circuit Impedance (%)	Main Unit Weight (kg)	Length (L)×Width (W)×Height (H) (Without Protective Enclosure)	Length (L)×Width (W)×Height (H) (With Protective Enclosure)	Wheelbase (mm)
100	6 6.3 6.6 10 10.5 11	±5 Or ±2×2.5	0.4	Yyn0 Or Dyn11	400	2160	1.7	4	750	1050×600×1000	1300×1000×1500	550×550
160					560	3100	1.5		950	1120×770×1100	1400×1100×1500	710×660
200					650	3970	1.4		1150	1160×770×1150	1450×1100×1500	710×660
250					750	4670	1.3		13580	1220×770×1200	1500×1150×1500	710×710
315					880	5610	1.1		1600	1260×700×1250	1550×1150×1550	710×710
400					1040	6630	1.1		1750	1320×770×1300	1600×1150×1600	710×710
500					1200	7940	1.0		2050	1360×820×1350	1650×1200×1650	760×710
630					1340	9770	0.9	6	2400	1420×820×1400	1700×1200×1700	760×710
800					1690	11560	0.75		2800	1500×980×1550	1850×1250×1800	920×820
1000					1980	13340	0.65		3200	1550×980×1600	1850×1250×1850	920×820
1250					2380	15640	0.6		3800	1600×980×1650	1900×1250×1900	920×820
1600					2730	18100	0.6		4500	1700×980×1700	2000×1300×2100	920×920
2000					3320	21250	0.5		5600	1800×980×1800	2100×1300×2200	920×920
2500					4000	24730	0.45		6300	1850×980×1900	2100×1300×2300	1020×920

Notes: The overall dimensions and weight data in the table are for reference only; no prior notice will be given for any changes.

Applicable Standards

GB6450-1986 Dry-Type Power Transformers
GB/T10228-1997 Technical Parameters and Requirements for Dry-Type Power Transformers
GB/T17211-1998 Loading Guide for Dry-Type Power Transformers
GB1094.3-2003 Power Transformers - Part 3: Insulation Levels, Dielectric Tests and Air Clearances for External Insulation
JB/T10088-2004 Sound Levels for 6~500kV Power Transformers
JB/T56009-1998 Product Quality Grading for Dry-Type Power Transformers

Frequently Asked Questions

What insulation class and materials are used in the SG(B)10 transformer?

The SG(B)10 transformer utilizes Class H (180°C) insulation, with DuPont NOMEX® paper (Class C) serving as the primary insulation material. This thin, uniform insulation layer ensures long-term reliability without cracking or degradation.

Can the SG(B)10 transformer handle overloads and extreme cold temperatures?

Yes. The transformer features strong short-time overload capacity, allowing it to operate continuously at 120% load and up to 140% load for 3 hours without forced cooling. Due to the elastic and non-aging properties of its insulation, it can also immediately carry full load at temperatures as low as -50°C.

What are the fire safety characteristics of this transformer?

The SG(B)10 transformer is flame-retardant, self-extinguishing, non-toxic, and fireproof. Furthermore, it generates almost no smoke even when subjected to combustion under high-temperature open flames.

How does the design prevent short-circuits and partial discharge?

The high-voltage side features continuous winding while the low-voltage side uses foil winding. The entire unit is vacuum impregnated and cured, and supported by high-strength ceramic insulators. This structure ensures excellent resistance to sudden short-circuit currents and keeps partial discharge exceptionally low.