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630kVA Three-Phase Oil-Immersed Outdoor Substation Transformer | 220V to 380V Step-Up Transformer

630kVA Three-Phase Oil-Immersed Outdoor Substation Transformer | 220V to 380V Step-Up Transformer

This 630kVA three-phase oil-immersed transformer is designed for outdoor substations, providing reliable voltage conversion from 220V to 380V. With a robust oil-immersed cooling system, it ensures excellent heat dissipation, stable performance, and long service life. Ideal for industrial facilities, commercial power distribution, and utility applications, this step-up transformer delivers consistent efficiency even under heavy load conditions.

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Phone/WhatsApp: 8619131285373

Email: info@zishengtransformer.com
Factory Headquarters: No. 118, Jingyi Street, Economic Development Zone.

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1. Product Overview

ZISHENG 630kVA Three-Phase Oil-Immersed Outdoor Substation Transformer is a high-performance power distribution transformer designed for outdoor substations, industrial power systems, renewable energy projects, and utility distribution networks.

With a rated capacity of 630kVA, this transformer is engineered to provide reliable voltage conversion between 220V and 380V systems, ensuring stable and efficient power supply for various applications.

The transformer adopts high-quality transformer oil as the insulation and cooling medium. The oil immersed design provides excellent heat dissipation, strong insulation capability, high overload resistance, and reliable operation in outdoor environments.

Manufactured with advanced production technology, premium electrical materials, and strict quality control procedures, ZISHENG 630kVA Oil Immersed Transformer features:

  • High energy efficiency
  • Low power loss
  • Strong short-circuit resistance
  • Excellent overload capability
  • Stable operation under harsh environmental conditions
  • Long service life

It is widely applied in:

  • Outdoor substations
  • Industrial facilities
  • Solar photovoltaic projects
  • Commercial power distribution systems
  • Mining and infrastructure projects
  • Utility power networks

2. Product Specifications

Parameter Specification
Product Name 630kVA Three-Phase Oil-Immersed Outdoor Substation Transformer
Rated Capacity 630kVA
Transformer Type Oil Immersed Distribution Transformer
Phase Three Phase
Application Outdoor Substation / Power Distribution
Voltage Ratio 220V / 380V (Customized)
Frequency 50Hz / 60Hz
High Voltage Side Customized
Low Voltage Side Customized
Cooling Method ONAN (Oil Natural Air Natural)
Winding Material Copper / Aluminum
Core Material Grain-Oriented Silicon Steel
Insulation Medium Transformer Oil
Installation Type Outdoor
Tap Changer Off-Circuit Tap Changer
Tank Type Sealed Tank / Conservator Type
Protection Level Customized
Standards IEC / ANSI / Customer Requirements

3. Main Structure Design

3.1 High-Efficiency Silicon Steel Core

The 630kVA transformer uses high-quality grain-oriented silicon steel sheets with optimized magnetic circuit design.

Advantages:

  • Low no-load loss
  • Reduced excitation current
  • Improved energy efficiency
  • Lower operating temperature
  • Reduced electromagnetic noise
  • Enhanced reliability

The advanced core structure reduces energy consumption during long-term operation and improves overall transformer performance.


3.2 High-Strength Three-Phase Winding System

The transformer adopts high-quality copper or aluminum windings designed for three-phase power distribution applications.

Features:

  • Excellent electrical conductivity
  • Strong mechanical strength
  • High thermal stability
  • Reliable insulation performance
  • Strong short-circuit withstand capability

The optimized winding structure ensures stable operation under normal and abnormal load conditions.


3.3 Transformer Oil Cooling System

The transformer uses high-quality insulating oil as the cooling and insulation medium.

Functions:

  • Transfers heat from internal components
  • Provides electrical insulation
  • Reduces operating temperature
  • Improves overload capability
  • Extends insulation lifespan

The ONAN cooling system enables reliable operation without additional cooling equipment.


3.4 Durable Outdoor Oil Tank Structure

The transformer tank is designed for outdoor installation and manufactured with high-strength steel materials.

Features:

  • Weather-resistant design
  • Reliable oil sealing
  • Moisture protection
  • Dust resistance
  • Strong mechanical durability

It can operate reliably in:

  • High-temperature environments
  • Tropical climates
  • High-humidity regions
  • Outdoor substations

4. Product Advantages

Reliable Outdoor Substation Performance

The 630kVA Oil Immersed Transformer is specifically designed for outdoor power distribution applications.

Advantages:

  • Stable voltage conversion
  • Continuous power supply
  • Strong environmental adaptability
  • Long-term reliable operation

High Energy Efficiency

The transformer uses low-loss materials and optimized electromagnetic design.

Benefits:

  • Reduced electricity loss
  • Lower operating costs
  • Improved energy utilization
  • Reduced carbon emissions

Excellent Heat Dissipation

The oil immersed cooling system effectively removes heat generated by:

  • Iron core
  • Windings
  • Internal electrical components

Benefits:

  • Stable temperature control
  • Improved insulation life
  • Better overload capability

Strong Overload Capability

The reinforced structure and efficient cooling system allow the transformer to withstand temporary overload conditions.

Suitable for applications with:

  • Industrial load fluctuations
  • Peak power demand
  • Renewable energy generation changes

Superior Short-Circuit Resistance

The reinforced winding structure improves resistance against mechanical forces caused by short circuits.

Benefits:

  • Improved safety
  • Reduced failure risk
  • Higher operational reliability

5. Application Areas

Outdoor Substations

  • Utility substations
  • Distribution substations
  • Medium voltage networks

Industrial Power Systems

  • Manufacturing factories
  • Mining operations
  • Oil and gas facilities
  • Industrial parks

Renewable Energy Projects

  • Solar PV plants
  • Wind farms
  • Battery energy storage systems

Commercial Infrastructure

  • Shopping centers
  • Office complexes
  • Residential communities
  • Large public facilities

Agricultural and Remote Power Supply

  • Rural electrification
  • Agricultural irrigation systems
  • Remote villages

6. 220V to 380V Voltage Conversion Application

The 630kVA transformer can be configured for 220V to 380V voltage conversion according to customer requirements.

Typical Applications:

  • Low-voltage distribution networks
  • Industrial equipment power supply
  • Commercial electrical systems
  • Rural power improvement projects

Benefits:

  • Stable voltage output
  • Improved power quality
  • Suitable for different electrical loads
  • Flexible installation options

7. Customization Options

ZISHENG provides customized transformer solutions based on project requirements.

Available options:

  • Voltage ratio customization
  • 50Hz / 60Hz frequency
  • Copper or aluminum winding
  • Vector group selection
  • Impedance adjustment
  • Tap changer configuration
  • Tank design customization
  • Special environmental protection
  • Different installation requirements

Optional accessories:

  • Oil temperature indicator
  • Oil level indicator
  • Pressure relief device
  • Lightning arrester
  • Conservator tank
  • Buchholz relay
  • Protective enclosure

8. Manufacturing Process and Quality Control

ZISHENG follows strict quality management throughout production.

Raw Material Inspection

Including:

  • Silicon steel sheet inspection
  • Conductor material inspection
  • Insulation material inspection
  • Transformer oil testing

Production Process

Including:

  • Core cutting and assembly
  • Coil winding
  • Insulation treatment
  • Transformer assembly
  • Tank welding
  • Vacuum oil filling

Final Testing

Each 630kVA transformer undergoes professional testing:

  • Winding resistance test
  • Insulation resistance test
  • Voltage ratio test
  • No-load loss test
  • Load loss test
  • Dielectric strength test
  • Oil leakage test
  • Short-circuit performance verification

Only qualified products are approved for delivery.


9. Why Choose ZISHENG 630kVA Three-Phase Oil-Immersed Transformer

  • Professional transformer manufacturer
  • Multiple production lines
  • Advanced manufacturing technology
  • High-quality electrical materials
  • Strict quality control system
  • Competitive factory-direct pricing
  • Customized engineering solutions
  • Stable production capacity
  • Reliable delivery capability
  • Export experience in Africa, South America, Southeast Asia, Central Asia, and Middle East markets

ZISHENG 630kVA Three-Phase Oil-Immersed Outdoor Substation Transformer | 220V to 380V Step-Up Transformer provides a reliable, efficient, and durable power distribution solution for utility companies, EPC contractors, industrial enterprises, renewable energy developers, and electrical equipment distributors worldwide.

630kVA Three-Phase Oil-Immersed Outdoor Substation Transformer Product Q&A

Q1: What is a 630kVA Three-Phase Oil-Immersed Outdoor Substation Transformer?

A: A 630kVA Three-Phase Oil-Immersed Outdoor Substation Transformer is a power distribution transformer designed for outdoor substations and medium-voltage power networks.

With a rated capacity of 630kVA, it converts electrical energy between different voltage levels, such as 220V and 380V systems, providing stable and reliable power supply for industrial, commercial, renewable energy, and utility applications.

The transformer uses transformer oil as both the insulation and cooling medium, ensuring excellent heat dissipation, reliable insulation performance, and long-term stable operation.


Q2: What are the main advantages of a 630kVA Oil-Immersed Transformer?

A: The main advantages include:

  • High reliability for outdoor substation applications
  • Excellent transformer oil cooling performance
  • Low energy loss and high efficiency
  • Strong overload capability
  • Superior short-circuit resistance
  • Long service life
  • Stable operation in harsh environments
  • Strong mechanical structure
  • Flexible customization options
  • Easy integration into power distribution systems

Q3: What is the application of a 630kVA transformer in substations?

A: A 630kVA transformer is commonly used in:

  • Distribution substations
  • Industrial substations
  • Solar power substations
  • Commercial power systems
  • Rural electrification projects
  • Infrastructure power networks

It provides voltage transformation and stable electricity distribution between medium-voltage and low-voltage systems.


Q4: Can the 630kVA transformer convert 220V to 380V?

A: Yes. The transformer can be customized for 220V to 380V voltage conversion according to customer requirements.

Typical applications include:

  • Industrial equipment power supply
  • Low-voltage distribution systems
  • Commercial buildings
  • Agricultural power systems
  • Remote area electrification

The exact voltage ratio can be adjusted according to local grid standards and project specifications.


Q5: What are the available voltage ratings for the 630kVA Oil Immersed Transformer?

A: ZISHENG provides customized voltage configurations.

Common high voltage ratings include:

  • 6kV
  • 10kV
  • 11kV
  • 13.8kV
  • 15kV
  • 20kV
  • 35kV

Common low voltage ratings include:

  • 220V
  • 380V
  • 400V
  • 415V
  • 480V
  • 690V

Customized voltage combinations are available according to project requirements.


Q6: What is the difference between a 630kVA Oil-Immersed Transformer and a Dry Type Transformer?

A: The main differences are:

Item 630kVA Oil-Immersed Transformer 630kVA Dry Type Transformer
Cooling Method Transformer oil cooling Air cooling
Insulation Medium Transformer oil Solid insulation
Installation Outdoor substations Mainly indoor applications
Heat Dissipation Excellent Good
Overload Capability Strong Moderate
Maintenance Requires oil inspection Lower maintenance
Application Power grids, substations, industrial projects Buildings, data centers, indoor facilities

Oil-immersed transformers are preferred for outdoor substations and applications requiring high reliability and continuous operation.


Q7: Is the 630kVA transformer available with copper winding?

A: Yes. ZISHENG provides copper and aluminum winding options.

Copper winding advantages:

  • Higher conductivity
  • Lower electrical losses
  • Better thermal performance
  • Strong mechanical strength
  • Improved short-circuit resistance
  • Longer operating life

The winding material can be selected according to project requirements and budget considerations.


Q8: What type of transformer oil is used in this transformer?

A: The 630kVA transformer uses high-quality transformer oil designed for power transformer applications.

Transformer oil provides:

  • Electrical insulation
  • Heat transfer capability
  • Cooling performance
  • Protection of internal components
  • Improved transformer lifespan

Special oil requirements can be customized according to customer standards.


Q9: How does the oil cooling system improve transformer performance?

A: Transformer oil performs two important functions:

Cooling Function:

  • Removes heat generated by the core and windings
  • Maintains safe operating temperature
  • Improves overload capability

Insulation Function:

  • Provides electrical insulation between internal components
  • Enhances transformer reliability
  • Extends insulation system life

Q10: Can the 630kVA transformer be installed outdoors?

A: Yes. This transformer is specially designed for outdoor installation.

The outdoor structure provides:

  • Weather resistance
  • Moisture protection
  • Dust protection
  • Strong mechanical strength
  • Reliable oil sealing

It can operate in environments such as:

  • Tropical regions
  • High-temperature areas
  • High-humidity locations
  • Industrial environments

Q11: What maintenance does a 630kVA Oil-Immersed Transformer require?

A: Regular maintenance includes:

  • Checking transformer oil level
  • Inspecting oil leakage
  • Testing oil insulation condition
  • Checking bushings
  • Inspecting electrical connections
  • Testing insulation resistance
  • Checking grounding system
  • Inspecting protection devices

Proper maintenance helps ensure long-term safe operation.


Q12: What safety protection accessories are available?

A: ZISHENG can provide optional protection accessories, including:

  • Oil temperature indicator
  • Oil level indicator
  • Pressure relief device
  • Lightning arrester
  • Conservator tank
  • Buchholz relay
  • Protective enclosure

These accessories improve transformer monitoring and operational safety.


Q13: What standards does the 630kVA transformer comply with?

A: ZISHENG transformers can be manufactured according to:

  • IEC standards
  • ANSI standards
  • Customer technical specifications
  • Local electrical regulations

The transformer design can be adjusted according to the requirements of different countries and power systems.


Q14: Can the 630kVA transformer operate in harsh environments?

A: Yes. The transformer can be designed for challenging environments, including:

  • High temperature areas
  • Tropical climates
  • High humidity regions
  • Dusty locations
  • Coastal environments

The durable tank structure and reliable insulation system ensure stable operation.


Q15: What is the service life of a 630kVA Oil-Immersed Transformer?

A: A high-quality 630kVA Oil-Immersed Transformer can provide decades of reliable operation when properly installed and maintained.

The service life depends on:

  • Operating load conditions
  • Environmental conditions
  • Maintenance quality
  • Insulation performance
  • Operating temperature

ZISHENG uses high-quality materials and strict manufacturing processes to ensure long-term performance.


Q16: Why choose ZISHENG 630kVA Three-Phase Oil-Immersed Outdoor Substation Transformer?

A: ZISHENG provides:

  • Professional transformer manufacturing experience
  • Multiple production lines
  • Stable production capacity
  • Advanced manufacturing technology
  • Strict quality control
  • Competitive factory pricing
  • Customized engineering solutions
  • Reliable delivery capability
  • International export experience

ZISHENG 630kVA Three-Phase Oil-Immersed Outdoor Substation Transformer is a reliable power solution for utility companies, EPC contractors, renewable energy developers, industrial enterprises, and electrical equipment distributors worldwide.

630kVA Three-Phase Oil-Immersed Outdoor Substation Transformer | 220V to 380V Step-Up Transformer630kVA Three-Phase Oil-Immersed Outdoor Substation Transformer | 220V to 380V Step-Up Transformer

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