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Hermetically Sealed 250KVA 315KVA Three-Phase Oil Immersed Step-Down Distribution Transformer with Low-Loss Core

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Hermetically Sealed 250KVA 315KVA Three-Phase Oil Immersed Step-Down Distribution Transformer with Low-Loss Core

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HENTG POWER Hermetically Sealed Oil-immersed 250KVA 315KVA Three-Phase Oil-Immersed Step-Down Distribution Transformer
PRODUCTS DESCRIPTION

Our 250kVA and 315kVA hermetically sealed oil-immersed distribution transformers are designed for dependable medium-voltage to low-voltage power delivery. The sealed tank structure eliminates oil leakage risks, improves heat dissipation, and ensures long-term stability even in harsh environments such as high temperature, humidity, and dust. These three-phase step-down transformers are widely used in utilities, commercial facilities, industrial plants, rural electrification projects, and renewable energy systems. They feature low-loss core materials, high mechanical strength windings, and high-performance insulating oil to guarantee excellent efficiency and extended service life.
OUR ADVANTAGES

The advantages of Type S13 oil-immersed distribution transformer

The Type S13 oil-immersed distribution transformer widely used in residential areas, commercial centers, industrial parks, and rural electrification projects. Compared to S9 or S11, the S13 offers several improvements. Here are the key advantages : 1. Higher Energy Efficiency Lower no-load loss: The S13 series uses high-quality silicon steel sheets and optimized magnetic circuit designs, reducing no-load losses by 20–30% compared to S11 models. Lower load loss: Improved winding structure and materials reduce resistance and load losses, improving overall efficiency. 2. Improved Temperature Rise Performance Enhanced oil circulation and cooling systems help maintain stable operation under load.Better thermal management leads to longer insulation life . 3. Reduced Noise Levels Use of high-permeability silicon steel and precision manufacturing lowers magnetostriction, resulting in quieter operation.
4. Robust Mechanical Design Improved short-circuit resistance due to optimized winding structure and clamping. Core and coil assembly is more stable, reducing vibration and mechanical stress. 5. Longer Service Life Better materials and structural improvements lead to extended service life, often reaching 20–30 years under proper conditions.

PRODUCT PARAMENTERS
Rated capacity (KVA)
Vector Group
Voltage Combination
No-load loss
Load loss
No-load current
lmpedance
HV
Tapping range
LV
Dy
Yy
30









Yyn0 / Dyn11








10
6.3
6








±5%

±2X2.5%










0.4
80
630
600
1.5
4.0
50
100
910
870
1.3
63
110
1090
1040
1.2
80
130
1310
1250
1.2
100
150
1580
1500
1.1
125
170
1890
1800
1.1
160
200
2310
2200
1.0
200
240
2730
2600
1.0
250
290
3200
3050
0.9
315
340
3830
3650
0.9
400
410
4520
4300
0.8
500
480
5410
5150
0.8
630
570
6200
6200
0.6
4.5
800
700
7500
7500
0.6
1000
830
10300
10300
0.6
1250
970
12000
12000
0.5
1600
1170
14500
14500
0.5
2000
1360
18300
18300
0.4
5.0
2500
1600
21200
21200
0.4
TRANSFORMER CATALOG
CONUSULTING PROCESS
Step 1: We will respond to your inquiry within 1 hour and recommend suitable transformer according to your needs. At the same time, we will provide you with reasonable quotations and payment terms.
We have a professional and independent drawing team and technical team, and we will confirm all the contents on the drawing with you within 7 days after payment. The drawing usually contains technical data, weight and parts list. If you have any questions, please click here to consult.
Step 2: After designing the production drawing, the factory will prepare the stock, produce, and conduct quality inspection before shipment. If you have special accessory requirements, we can provide you with accessories. Our raw materials are strictly screened. In the quality inspection stage, we will provide you with the dual guarantee of QC report and test report to escort your products. Step 3: We have a professional team to guide the installation, and also support on-site installation. We will provide you with more than 2 years of warranty service. Welcome to join us and create a win-win situation. Click here to start our business now.
If you have any questions, welcome to click here for discussion !!!
WHY CHOOSE US
● Professional 30+ senior engineers offer 24 hours online service and response within 30 mins. ● 100000 m² factory, 250 workers, 30 +engineers.
● 4 production line, 10000+ sets annual production capacity. ● 100% OQC testing with 25 detection contents. ● 15 years power transformer designing and production experience. ● Products comply with GB 20052-2024/ANSI/IEEE/DOE2016/CSA/IEC60076 standard. ● Cross-industry power transformer solution. ● Global on-site technical support.

Our Business Partner
COMPANY PROFILE
HENTG Power is an ISO9001 certified transformer manufacturer specializing in reliable, high-performance solutions for global power systems since 2011.

With an 100,000 m² factory, over 250 skilled workers, more than 30 senior engineers, and 10+ professional testing engineers, HENTG Power is dedicated to delivering high-quality transformer solutions with strong production capacity 20000 units/year.

Our products comply with GB 20052-2024 and IEC 60076 standards, and are widely used in global markets across various applications. We offer a wide range of transformers including dry transformer, oil immersed transformer, substation , switchgear, distribution box. our products are widely used in United states, Africa, Middle east, South America, Middle Asia, Southeast Asia, etc .

Guided by our mission — “Transform Energy, Connect the Future.” — HENTG implements strict 5S factory management at every stage of production. Every transformer undergoes 100% Outgoing Quality Control (OQC) with 8 comprehensive testing procedures to ensure performance and reliability.
Patents and certificates
CUSTOMER PHOTOS
FAQ
Q: Who are we ? HENTG POWER is a professional designer, manufacturer and installer of power system solution around the World, was founded in 2011, occupies 100,000 square meter. specializing in reliable, high-performance solutions for global power systems Q: How can we guarantee quality ? Always a pre-production sample before mass production; Always final Inspection before shipment, We will provide QC & test reports. We accept FAT(Factory Acceptance Test). Factory can manufacture oil type and dry type distribution transformer, max 500KV 480MVA power transformer, GIS, switchgear, substation, based on ANSI/IEEE/DOE2016/CSA/IEC60076 standard. We will provide you with the guarantee service of over 2 years. Q: Why choose us? We have the professional and independent drawing team and technical team, It is expected that we can confirm all the contents on the drawings with you within 7 days. We have a professional technical team with 30+ senior engineers offer 24 hours online service and response within 30 mins. Q: What services can we provide? Accept OEM, business payment are negotiated.


Product Tags:

Low-Loss Core Oil Immersed Transformer

      

High Mechanical Strength Windings Distribution Transformer

      

High-Performance Insulating Oil Step-Down Transformer

      
China Hermetically Sealed 250KVA 315KVA Three-Phase Oil Immersed Step-Down Distribution Transformer with Low-Loss Core factory

Hermetically Sealed 250KVA 315KVA Three-Phase Oil Immersed Step-Down Distribution Transformer with Low-Loss Core Images

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