S13-M 10kV Hermetically Sealed Distribution Transformer - High Efficiency from China Suppliers and Factory

Our company, a leading manufacturer in China, specializes in the S13-M series of Hermetically Sealed Oil-immersed Power Transformers. These advanced Transformers are designed for exceptional performance, featuring low loss, minimal noise, and high efficiency. This results in substantial energy savings and a reduced environmental footprint. Unlike traditional oil-immersed transformers, our hermetically sealed design eliminates the need for a conservator. The innovative bellows tank effectively compensates for oil volume changes with its flexible walls, sealing the transformer from external elements and preventing oil deterioration and insulation aging. As one of the top suppliers in the industry, we ensure that our robust Transformers offer enhanced operational reliability and require no maintenance during standard service, delivering a trustworthy power solution from our factory to your operation

Product Details

Type Designation

No.	Description
1	Three-phase Oil-immersed Transformer
2	Performance Level Code
3	Sealed Construction
4	Rated Capacity kVA
5	Voltage Class kV

Service Conditions

1Maximum ambient temperature: +40°C
2Minimum ambient temperature: -25°C
3Altitude: <1000m
4Maximum monthly average relative humidity: 90% (at 20°C)
5Installation location: Installed indoors or outdoors at sites without fire or explosion hazards, severe contamination, chemical corrosion, and severe vibration.

Product Display

Technical Parameters

Rated Capacity (KVA)	Voltage Combination And Tap Range			Connection Group Label	S13		S11		Short Circuit Impedance (%)
Rated Capacity (KVA)	High Voltage (KV)	Tapping Range Of Voltage %	Low Voltage (KV)	Connection Group Label	No-load Loss (KW)	On-load Loss (KW)	No-load Loss (KW)	On-load Loss (KW)	Short Circuit Impedance (%)
30	6 6.3 6.6 10 10.5 11	±5 ±2×2.5	0.4	Dyn11 Yzn11 Yyn0	0.08	0.63/0.6	0.1	0.63/0.6	4.0
50					0.1	0.91/0.87	0.13	0.91/0.87
63					0.11	1.09/1.04	0.15	1.09/1.04
80					0.13	1.31/1.25	0.18	1.31/1.25
100					0.15	1.58/1.5	0.2	1.58/1.5
125					0.17	1.89/1.8	0.24	1.89/1.8
160					0.2	2.31/2.2	0.28	2.31/2.2
200					0.24	2.73/2.6	0.34	2.73/2.6
250					0.29	3.2/3.05	0.4	3.2/305
315					0.34	3.83/3.65	0.48	3.83/3.65
400					0.41	4.52/4.3	0.57	4.52/4.3
500					0.48	5.41/5.15	0.68	5.41/5.15
630				Dyn11 Yyn0	0.57	6.2	0.81	6.2	4.5
800					0.7	7.5	0.98	7.5
1000					0.83	10.3	1.15	10.3
1250					0.97	12	1.36	12
1600					1.17	14.5	1.64	14.5
2000					1.55	18.3	1.94	18.3	5.0
2500					1.83	21.2	2.29	21.2	5.0

Product Features

1 The transformer core is laminated from imported high-quality cold-rolled silicon steel sheets, significantly reducing no-load loss and no-load current. The core is also bound to ensure compactness and reduce noise.
2 The high and low-voltage windings are wound with oxygen-free copper. The low-voltage winding for 500 kVA and below employs a double-layer cylindrical structure, while for 630 kVA and above, it uses a double or quadruple spiral structure. The high-voltage winding utilizes a multi-layer cylindrical structure.
3 The transformer vector group is Dyn11, which reduces the impact of harmonics on the power grid and improves power supply quality.
4 The transformer features a fully sealed structure, extending its service life and eliminating the need for core lifting (internal inspection) and maintenance.
5 The measured noise level is lower than the standard requirement.

Frequently Asked Questions

Q What is the difference between S13 and S11 oil-immersed transformers?

The S13 series features lower no-load losses compared to the S11 series due to the use of higher-grade silicon steel core materials. This results in greater energy efficiency and reduced operating costs over the transformer's lifetime, making S13 the preferred choice for energy-saving applications.

Q What does the fully sealed structure of the transformer mean?

The fully sealed structure means the transformer tank is hermetically sealed, preventing moisture ingress and oxidation of the insulating oil. This eliminates the need for periodic internal inspections (core lifting) and significantly extends the transformer's service life with minimal maintenance requirements.

Q What are the available high-voltage options for this transformer?

The transformer is available in high-voltage options of 6 kV, 6.3 kV, 6.6 kV, 10 kV, 10.5 kV, and 11 kV, with a tapping range of ±5% or ±2×2.5%, providing flexibility for various grid voltage requirements.

Q Can this transformer be installed outdoors?

Yes, this transformer can be installed both indoors and outdoors. However, the installation site must be free from fire or explosion hazards, severe contamination, chemical corrosion, and severe vibration. The altitude should not exceed 1000m for standard service conditions.

Q Why is the Dyn11 vector group beneficial for power supply quality?

The Dyn11 vector group configuration effectively suppresses third-harmonic currents from circulating into the power grid, reducing harmonic distortion and improving overall power supply quality. It also provides a neutral point on the low-voltage side, which is essential for single-phase loads and ground fault protection.

Q What capacity range is available for the S13-M series transformer?

The S13-M series three-phase oil-immersed transformer is available in a wide capacity range from 30 kVA up to 2500 kVA, making it suitable for a broad range of industrial, commercial, and utility distribution applications.