S11-M 10kV Fully-Sealed Distribution Transformer - China Suppliers & Factory for Reliable Power Solutions

Introducing our S11-M 10kV Series Fully-Sealed Distribution Transformers, designed specifically for outdoor applications with power capacities ranging from 30 to 2500 kVA. As a leading supplier and factory in China, we ensure that our transformers meet stringent GB standards while delivering exceptional performance. These Fully-Sealed Distribution Transformers are engineered to achieve reduced no-load losses—30% lower than the traditional S9 series—enhancing efficiency and reliability, Built to withstand harsh environmental conditions, our transformers feature robust short-circuit resistance and innovative wave-type tank designs for maintenance-free operation. Key specifications include customizable voltage combinations, Dyn11/Yyn0 connection groups, and compact dimensions that fit seamlessly into various installations, Safety is paramount; our transformers are equipped with pressure relief valves and gas relays to provide enhanced protection in industrial settings. Additionally, we offer customizable options such as rectifier and mining transformers to suit specific operational needs. Our sealed structure guarantees longevity and dependability, making our S11-M series the ideal choice for a range of industrial applications. Choose us as your trusted partner for high-quality distribution transformers from a top China supplier and factory

Product Details

Type Designation

1	Three-phase Oil-immersed Transformer
2	Performance Level Code
3	Sealed Construction
4	Rated Capacity (kVA)
5	Voltage Class (kV)

Key Features

1Compared to the S9 type transformer, the no-load loss of this series is reduced by approximately 30% on average.
2The low-voltage winding uses layer or spiral structure, with high mechanical strength, balanced Ampere-Turn distribution, resulting in good short-circuit withstand capability.
3The core and windings assembly has added positioning structures to prevent displacement during transportation. All fasteners are equipped with lock nuts to ensure they do not loosen during long-term operation, meeting the requirement for no core lifting.
4The transformer uses a corrugated tank, eliminating the conservator. The tank cover is fully welded or bolted to the tank flange, extending the service life of the transformer oil.
5The product surface is treated with degreasing, derusting, and phosphating before spraying with primer and topcoat, meeting special requirements for metallurgical, petrochemical systems, and damp, polluted areas.
6Selected components are used, featuring a fully sealed transformer tank. Standard accessories include a pressure relief device, signaling thermometer, gas relay, etc., ensuring safe transformer operation.
7This series of products features an attractive appearance and compact size, reducing the installation footprint. It is an ideal, high-quality, maintenance-free product.

Product Display

10kV Hermetically Sealed Distribution Transformer (2)

10kV Hermetically Sealed Distribution Transformer (1)

Technical Parameters

S11-M Type 10kV Series Fully-Sealed Distribution Transformer Technical Parameters

Rated Capacity (kVA)	Voltage Combination			Vector Group Symbol	No-load Loss (W)	Load Loss (W)	Short-circuit Impedance (%)	No-load Current (%)	Weight (kg)		Overall Dimensions (mm)	Rail Distance (mm)
Rated Capacity (kVA)	High Voltage (kV)	Tapping Range (%)	Low Voltage (kV)	Vector Group Symbol	No-load Loss (W)	Load Loss (W)	Short-circuit Impedance (%)	No-load Current (%)	Oil Weight	Total Weight	Length(L)×Width(W)×Height(H)	Rail Distance (mm)
30	6 6.3 6.6 10 10.5 11	±5 ±2×2.5	0.4	Yyn0 Or Dyn11	100	600	4.0	1.8	80	300	830×590×980	400×400
50					130	870		1.7	100	360	880×600×1010	400×400
63					150	1040		1.6	110	420	910×650×1040	400×400
80					180	1250		1.5	125	480	930×700×1080	550×550
100					200	1500		1.4	135	550	940×710×1130	550×550
125					240	1800		1.3	145	650	950×720×1150	550×550
160					280	2200		1.2	155	750	1000×740×1220	550×550
200					340	2600		1.1	180	880	1040×750×1250	550×550
250					400	3050		1.0	215	1050	1340×750×1250	550×550
315					480	3650		0.9	240	1220	1350×780×1330	660×660
400					570	4300		0.8	300	1420	1460×840×1360	660×660
500					680	5150		0.8	340	1650	1480×860×1410	660×660
630					810	6200	4.5	0.7	380	2000	1570×930×1460	710×710
800					980	7500		0.7	585	2360	1700×1000×1540	820×820
1000					1150	10300		0.6	630	2720	1780×1060×1640	820×820
1250					1360	12000		0.5	650	3350	1840×1130×1690	920×820
1600					1640	14500		0.5	850	3950	1950×1180×1760	920×820
2000					1940	17200		0.4	900	4600	2050×1250×1830	1070×1070
2500					2300	20300	5.5	0.4	1000	5600	2160×1360×1870	1070×1070

Note: 1. For technical parameters, overall dimensions, and weight data of 10kV class distribution transformers with larger capacities, please inquire with the company.
2. Transformers with various voltage combinations, short-circuit impedances, and connection methods can be provided according to user requirements.
3. Special transformers, such as rectifier transformers, furnace transformers, mining transformers, on-load tap-changing transformers, and transformers with enclosed covers, etc., can be provided according to user requirements.
4. The weight and overall dimension data in the table are for reference only; changes may be made without prior notice.

Standards

◇ GB1094.1~2-1996 Power Transformers
◇ GB1094.3,5-2003 Power Transformers
◇ GB/T6451-2008 Technical parameters and requirements for three-phase oil-immersed power transformers

Frequently Asked Questions

What is the S11-M type transformer and how does it differ from the S9 type?

The S11-M is a three-phase, oil-immersed, fully-sealed distribution transformer. Compared to the S9 type, the S11-M series achieves approximately 30% lower no-load loss on average, resulting in improved energy efficiency and reduced operating costs over its service life.

What voltage combinations are available for the S11-M 10kV series transformer?

The high-voltage side supports 6, 6.3, 6.6, 10, 10.5, and 11 kV with a tapping range of ±5% or ±2×2.5%. The low-voltage side is 0.4 kV. Vector group symbols available are Yyn0 or Dyn11. Custom voltage combinations can also be provided upon request.

What rated capacities are available for the S11-M series?

The S11-M series covers a wide range of rated capacities from 30 kVA up to 2500 kVA. For capacities beyond 2500 kVA, please contact the manufacturer directly for detailed technical parameters and specifications.

Why does the S11-M use a corrugated tank design instead of a conservator?

The corrugated tank design eliminates the need for a conservator by allowing the tank walls to flex with oil volume changes due to temperature variations. The tank cover is fully welded or bolted to the flange, creating a fully sealed environment that extends the service life of the transformer oil and reduces maintenance requirements.

Is the S11-M transformer suitable for harsh or polluted environments?

Yes. The product surface undergoes degreasing, derusting, and phosphating treatment before applying primer and topcoat. This process meets the special requirements for metallurgical and petrochemical systems as well as damp and heavily polluted installation areas, ensuring long-term durability.

Can the S11-M transformer be customized for special applications?

Yes. Special transformer types including rectifier transformers, furnace transformers, mining transformers, on-load tap-changing transformers, and transformers with enclosed covers can be manufactured according to user-specific requirements. Custom voltage combinations, short-circuit impedances, and connection methods are also available.