Oil Immersed Type Power Distribution Transformer Outdoor 250KVA 315KVA Three

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Product Specification


High Light	Oil Immersed Type Power Distribution Transformer ，Power Distribution Transformer Outdoor 250KVA ，315KVA Three Phase Distribution Transformer

Oil Immersed Type Power Distribution Transformer Outdoor 250KVA 315KVA Three Phase

Product Specifications

Attribute	Value
Frequency	50Hz, 60Hz
Phase	Three
Coil Number	Two Windings, Multi Winding, Three Windings, Single Winding
Application	Power Transformer
Coil Structure	Shell-Type Coil, layer coil, fully sealed construction, Disc Coil, round coil
Output Voltage	220V, 380V
Input Voltage	11kV, 10.5kV, 3kV, 12.47kV, 6.6kV
Type	Oil-Immersed Transformer, AUTOTRANSFORMER, Oil Filled Type
Winding Material	100% Copper/Aluminum
Cooling Method	ONAN ONAF
Customized	Accept
Capacity	250KVA 315KVA
Vector Group	Dyn11 / Yyn0
Efficiency	≥98%
Rating Capacity	30-1600KVA
Installation	Indoor/Outdoor
Noise Level	≤65dB

Product Description

HENTG POWER Three Phase Outdoor 250KVA 315KVA Oil Tester Step Down Power Distribution Transformer

Our oil-immersed distribution transformers range from 30kVA to 2500kVA, with voltage levels up to 35kV. They are widely used in power utilities, renewable energy, industrial facilities, railway systems, and urban infrastructure. Designed to IEC and ANSI standards, our transformers offer high efficiency, low losses, and long service life, suitable for both indoor and outdoor environments.

Type S13 oil-immersed distribution transformer is based on the original S11 distribution transformer, through the research and application of new materials and new technologies and the combination of independent innovation and technology introduction, through the optimization and innovative design of the core and coil structure, to reduce the no-load loss and noise purposes. Compared with the current national standard JB/T10088-2004, the noise level decreased by 20% on average, and the product performance level reached the domestic advanced level.

Ideal distribution equipment for urban and rural distribution network centers.

HENTG Power oil-immersed transformer outdoor installation

HENTG Power transformer technical specifications label

Key Advantages

Higher Energy Efficiency: Lower no-load loss (20-30% reduction compared to S11 models) and improved winding structure reduces resistance and load losses.
Improved Temperature Rise Performance: Enhanced oil circulation and cooling systems maintain stable operation under load with better thermal management.
Reduced Noise Levels: High-permeability silicon steel and precision manufacturing lowers magnetostriction for quieter operation.
Robust Mechanical Design: Optimized winding structure and clamping improves short-circuit resistance with stable core and coil assembly.
Longer Service Life: Superior materials and structural improvements extend service life to 20-30 years under proper conditions.

Technical Parameters

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

Ordering Process

Step 1: We respond within 1 hour with suitable transformer recommendations, reasonable quotations, and payment terms. Our technical team confirms all drawing details within 7 days after payment.

Step 2: After design approval, we prepare stock, produce, and conduct quality inspections. We provide QC and test reports for all products.

Step 3: We offer professional installation guidance and on-site support, plus a 2+ year warranty service.

If you have any questions, welcome to contact us for discussion!

Why Choose HENTG Power?

✓ Own Factory, Direct Manufacturer
✓ 24h Quick Quotation
✓ Customization Available
✓ Over 60 Countries Exported
✓ Engineering Support Available

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

With a 100,000 m² factory, over 250 skilled workers, more than 30 senior engineers, and 10+ professional testing engineers, we deliver high-quality transformer solutions with strong production capacity of 20,000 units/year.

Application Scenarios

⚡️ Power Distribution Networks

Company Details

Bronze Gleitlager

Bronze Sleeve Bushings

and

Graphite Plugged Bushings

from Quality China Factory



Business Type:

Manufacturer,Exporter,Trading Company,Seller 


Year Established:

2011 


Total Annual:

50000000-100000000


Employee Number:

200~250 


Ecer Certification：

Verified Supplier 

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 P... 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 P...

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Reach Us
Hunan Hentg Power Electric Technology Co., Ltd.
China Hunan Changsha，Room 908, Building D6, Zhongdian Software Park, Dongfanghong Street
https://www.ecer.com/corp/uuuf953-hentgpower2025.html

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