In modern electrical distribution systems, the 112.5 kVA transformer plays a vital role as a medium-capacity, high-efficiency power solution. It is widely used across North America and global markets, balancing compact size, reliability, and excellent performance.
As one of China’s top transformer manufacturers, Energy Transformer provides a full range of 112.5 kVA transformers, including dry type, isolation, pad mounted, pole mounted, and oil-immersed designs. This article explains everything you need to know about the 112.5 kVA transformer—its types, applications, and how to choose the best one for your project.
1. What Is a 112.5 kVA Transformer?
A 112.5 kVA transformer is designed to handle an apparent power load of 112.5 kilovolt-amperes, roughly equivalent to 90–100 kW of usable power depending on power factor.
This rating has become a standard in both utility and commercial power systems.
Typical applications:
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Commercial buildings and office towers
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Industrial workshops and factories
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Schools, hospitals, and research facilities
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Small power substations
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Step-down conversion from 480V to 208Y/120V
Its moderate capacity and flexible configuration make it one of the most common transformer sizes in North America.
2. Types of 112.5 kVA Transformers
Energy Transformer offers several configurations of the 112.5 kVA transformer, each designed to meet different installation and operating requirements.
2.1 112.5 kVA Dry Type Transformer
A 112.5 kVA dry type transformer uses air as its cooling medium instead of oil, ensuring fire safety, environmental protection, and easy maintenance.
This type is ideal for indoor use—mechanical rooms, basements, switchgear areas, and production halls.
Key advantages:
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Fire-safe, non-flammable construction
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Long lifespan with minimal maintenance
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High efficiency, meeting DOE 2016 standards
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Quiet operation suitable for commercial and residential buildings
Typical configuration:
480V Delta → 208Y/120V Wye
As a leading dry type transformer manufacturer, Energy Transformer produces fully tested and certified 112.5 kVA units that meet ANSI, IEEE, and UL standards.
2.2 112.5 kVA Isolation Transformer
An isolation transformer provides galvanic separation between input and output circuits, eliminating electrical noise, spikes, and harmonics.
Applications:
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Data centers and IT facilities
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Automation systems and CNC machinery
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Hospitals and laboratories
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Sensitive instrumentation
Benefits of Energy Transformer’s 112.5 kVA isolation transformer:
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Excellent noise suppression
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Improved power quality and system protection
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Optional electrostatic shield design
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Custom voltage ratios and enclosure options
This type ensures stable, clean power for precision equipment, reducing downtime and enhancing safety.
2.3 112.5 kVA Oil Immersed Transformer
The oil-immersed 112.5 kVA transformer is designed for outdoor and heavy-duty applications. Filled with high-grade mineral oil or eco-friendly ester fluid, it provides outstanding cooling, insulation, and long service life.
Advantages:
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Long-term reliability (25+ years)
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High overload capacity
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Compact design with sealed tank protection
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Easy maintenance and low noise
Typical configuration:
13.2 kV Delta → 480Y/277V or 208Y/120V
At Energy Transformer, each oil-immersed 112.5 kVA transformer undergoes vacuum oil-filling, high-voltage testing, and partial discharge inspection to ensure superior performance.
2.4 112.5 kVA Pad Mounted Transformer
A pad mounted transformer is installed on a concrete pad and connected to underground cables. It is a fully enclosed, tamper-proof, and weather-resistant design—perfect for modern urban power distribution.
Applications:
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Commercial complexes and office parks
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University and hospital campuses
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Residential communities
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Shopping centers
Features of Energy Transformer’s 112.5 kVA pad mounted transformer:
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Oil-filled, fully sealed and secure enclosure
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ANSI C57.12 / IEEE C57.12.34 compliance
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Suitable for loop-feed and radial-feed systems
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Optional stainless steel cabinet and smart monitoring system
Pad mounted transformers are the standard choice for North American underground networks, combining safety, aesthetics, and performance.
2.5 112.5 kVA Pole Mounted Transformer
The 112.5 kVA pole mounted transformer is typically used in rural or overhead power distribution systems. Mounted directly on a utility pole, it steps down medium-voltage (e.g., 13.2 kV) to low-voltage output (480V or 240/120V).
Advantages:
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Cost-effective and space-saving
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Quick installation on existing poles
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Reliable for scattered load areas
While 112.5 kVA is near the upper limit for pole installations, Energy Transformer engineers design reinforced pole-mount models with optimized weight distribution and cooling efficiency.
3. Technical Parameters of 112.5 kVA Transformers
| Parameter | Typical Specification |
|---|---|
| Rated Power | 112.5 kVA |
| Frequency | 60 Hz |
| Primary Voltage | 480V / 2400V / 4160V / 13.2kV |
| Secondary Voltage | 208Y/120V or 480Y/277V |
| Cooling Method | Dry (Air) / Oil (ONAN) |
| Insulation Class | 220°C (Dry Type) / OA (Oil Type) |
| Temperature Rise | 80°C, 115°C, or 150°C |
| Efficiency | DOE 2016 Compliant |
| Standards | ANSI, IEEE, UL, CSA |
All Energy Transformer products are built and tested under ISO 9001 quality control and conform to global efficiency regulations.
4. How to Choose the Right 112.5 kVA Transformer
Selecting the right transformer depends on your environment and load characteristics.
Step 1 – Define Voltage Requirements
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For facility use: 480V → 208Y/120V (dry or isolation transformer)
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For utility connection: 13.2kV → 480V (pad mounted or oil immersed)
Step 2 – Determine Installation Environment
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Indoor = Dry Type or Isolation
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Outdoor = Pad Mounted or Oil Immersed
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Overhead = Pole Mounted
Step 3 – Consider Cooling and Efficiency
Oil-filled transformers offer better thermal performance and efficiency for continuous load, while dry type units excel in clean indoor environments.
Step 4 – Verify Compliance
All Energy Transformer units are certified to ANSI / IEEE / DOE 2016 standards, ensuring long-term reliability and energy savings.
Step 5 – Custom Engineering Support
We provide tailor-made solutions—custom voltage ratios, vector groups, enclosures, tap changers, and monitoring systems—to meet unique project demands.
5. Maintenance Tips for Long Life
Proper maintenance ensures that your 112.5 kVA transformer delivers peak performance for decades.
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For dry type: keep ventilation clear, check terminals annually.
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For oil immersed: perform oil analysis, check seals, and clean bushings.
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For pad mounted: verify ground connections and inspect for leaks.
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For pole mounted: ensure proper support structure and grounding integrity.
Energy Transformer also offers professional transformer testing and on-site service for global clients.
6. Why 112.5 kVA Is the Ideal Capacity
Electrical engineers often consider 112.5 kVA as the “sweet spot” between performance and practicality.
It matches common distribution panel sizes, supports large facility loads, and remains easy to transport and install.
Advantages:
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Widely standardized and easy to replace
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Meets DOE efficiency thresholds
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Cost-effective for both new and retrofit projects
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Compatible with common 480/208V building systems
This is why the 112.5 kVA transformer remains a top-selling capacity worldwide.
Learn More：The Complete Transformer Wiring Guide 2025: Your Ultimate Practical Manual
7. Applications Across Industries
| Sector | Recommended Transformer Type |
|---|---|
| Commercial buildings | 112.5 kVA dry type transformer |
| Industrial workshops | 112.5 kVA isolation transformer |
| Public utilities | 112.5 kVA pad mounted transformer |
| Residential areas | 112.5 kVA pad or pole mounted transformer |
| Hospitals / Data centers | 112.5 kVA isolation transformer |
From energy distribution to mission-critical operations, Energy Transformer provides optimized power solutions tailored to your exact needs.
8. Why Choose Energy Transformer
With over 30 years of transformer manufacturing expertise, Energy Transformer has become one of China’s most trusted high-performance transformer suppliers.
Our advantages include:
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Fully integrated production and testing facilities
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International standards compliance (ANSI, IEEE, IEC, CSA)
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Custom engineering and OEM/ODM services
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Fast global delivery and responsive after-sales support
We have supplied thousands of 112.5 kVA transformers to clients in North America, the Middle East, and Southeast Asia, helping them achieve safe, efficient, and sustainable power distribution.
9. Contact Energy Transformer
Looking for a reliable 112.5 kVA transformer manufacturer?
We are ready to support your project with high-quality products and expert service.
🌐 Website: https://energypowertransformer.com/
📧 Email: service@energysplendor.com
Get a free quotation or technical consultation today from our professional team.
