Design advantages

Protection Where the Environment Is Tough

Transformer configurations are selected according to the actual installation site, electrical duty and customer specifications.

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Moisture-Resistant Construction

Appropriate tank sealing, bushings and external interfaces help reduce moisture ingress in humid outdoor environments.

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Coastal Corrosion Protection

Project-selected protective coatings and external hardware improve suitability for salt-laden coastal atmospheres.

High-Temperature Engineering

Cooling surfaces, insulation and thermal margins can be evaluated for elevated site ambient temperatures and load duty.

Where we work

Application-Focused Transformer Solutions

Built around the operational needs of utility, EPC and industrial customers.

01 / INDUSTRYCoastal Industrial Plants

Medium-voltage power distribution for manufacturing sites exposed to humidity and salt-laden air.

02 / PORTSSeaports & Marine Terminals

Power transformation for terminal facilities, logistics centers and port infrastructure.

03 / ISLANDSIsland Power Networks

Outdoor distribution solutions for island substations and remote facilities.

04 / WATERWater & Desalination

Transformer solutions for pumping stations, treatment plants and coastal utilities.

Technical reference

Typical Transformer Technical Parameters

Example configuration: 3150kVA, 22/0.4kV, three-phase oil immersed distribution transformer. Other capacities and voltage ratios are available subject to engineering confirmation.

3150kVA · 22/0.4kV · ONAN

Illustrative technical schedule

Parameter	Typical / Reference Value
Transformer Model	SL11-3150/22 (reference designation; verify final model)
Rated Capacity	3150 kVA
Rated Voltage (HV / LV)	22 kV / 0.4 kV
Rated Current (HV / LV)	82.66 A / 4546.6 A
Voltage Ratio	22 / 0.4 kV
Tap Range (HV Side)	±2 × 2.5% (subject to final design)
Short-Circuit Impedance	6% (reference; subject to specification)
Vector Group	Dyn11
Rated Frequency	50 Hz
Cooling Method	ONAN
Winding Material	Copper or aluminum, as specified
Other Available Capacities	1500 / 1600 / 2500 / 3150 kVA
Primary Voltage Options	11 kV / 22 kV
Environmental Protection	Customized coating, sealing and thermal design

Engineering note: The reference image labels 0.4kV/22kV as HV/LV and shows 4546.6A/90.93A. For a 3150kVA three-phase transformer rated 22/0.4kV, the correct HV/LV rated currents are approximately 82.66A/4546.6A, calculated from I = S/(√3 × V). Values shown here are preliminary, not a guaranteed technical datasheet. Site conditions, losses, impedance, insulation levels and accessories must be confirmed before quotation.

HENTG POWER services

From Project Requirements to Delivery

01 · Technical Review

We review rated capacity, voltage, load profile and installation conditions.

02 · Custom Engineering

Site-specific cooling, coating, insulation and accessory options.

03 · Inspection & Testing

Manufacturing quality control and agreed routine tests and documentation.

04 · Export Support

Project coordination, technical files and international shipping preparation.

Hunan Hentg Power Electric Technology Co., Ltd.

High Temperature 2.5 MVA Oil Immersed Distribution Transformer 3150KVA 22KV to 400V for Tropical Climates

Oil Immersed Transformers for Coastal & High-Humidity Applications