15kVA Isolation Power Transformer 480V to 240V 220V, Dry-Type Single Phase & Three Phase for Industrial and Commercial Use

15 kVA Isolation Power Transformer

480V to 240V / 220V Dry-Type Single Phase & Three Phase for Industrial and Commercial Use

The 15 kVA isolation power transformer is a compact, high-reliability dry-type transformer designed for safe voltage conversion, electrical isolation, and stable power delivery in industrial and commercial applications. It is engineered to step down 480V input to 240V or 220V output, and is available in both single phase and three phase configurations, making it suitable for a wide range of global power systems.

Thanks to its oil-free dry-type construction, the transformer eliminates the fire risks, leakage concerns, and maintenance complexity associated with oil-filled transformers. This makes it especially well suited for indoor installation, control cabinets, electrical rooms, commercial buildings, and automation systems where safety, space efficiency, and long-term reliability are critical.

With a 15kVA capacity, this isolation transformer fills the gap between small control transformers and larger industrial units, offering an ideal balance of performance, cost efficiency, and installation flexibility.

Technical Overview – 15kVA Dry-Type Isolation Power Transformer

The 15 kVA dry-type isolation transformer performs both voltage step-down conversion and galvanic isolation. By electrically separating the primary and secondary windings, it protects downstream equipment from electrical noise, voltage spikes, harmonics, and grounding issues commonly found in industrial and commercial power networks.

Key functional benefits include:
• Step-down voltage conversion from 480V to 240V / 220V
• Full electrical isolation between supply and load
• Improved power quality for sensitive equipment
• Enhanced operational safety for personnel and devices

The transformer can be configured as single phase or three phase, allowing seamless adaptation to different application and regional requirements.

Technical Specifications – 15kVA Dry-Type Isolation Transformer

How to Select a 15kVA Isolation Transformer

Selecting the correct 15kVA isolation transformer is essential to ensure safety, performance, and long-term reliability. Below are key factors to consider when specifying the transformer for your project:

1. Confirm Input and Output Voltage Requirements

Identify the primary supply voltage (such as 480V) and the required secondary voltage (240V or 220V). If your application involves imported equipment or mixed regional standards, confirm whether customized voltage ratios are required.

2. Choose Single Phase or Three Phase Configuration

Single phase isolation transformers are typically used for control circuits, lighting, and small equipment, while three phase units are preferred for motors, automation systems, and balanced industrial loads.

3. Determine Installation Environment

For indoor electrical rooms, control cabinets, or commercial buildings, a dry-type isolation transformer is the safest choice. Select NEMA 1 for indoor use or NEMA 3R for outdoor or semi-outdoor installations.

4. Consider Insulation Class and Duty Cycle

For continuous industrial operation or elevated ambient temperatures, Class F or Class H insulation ensures higher thermal endurance and longer service life.

5. Verify Compliance and Certification Needs

Depending on the project location, confirm compliance with ANSI, IEEE, IEC, or local standards. Optional certifications such as UL, CSA, or CE may be required for inspection and approval.

By evaluating these factors, users can select a 15kVA isolation power transformer that meets both technical and regulatory requirements while maximizing operational reliability.

Working Principle & Electrical Isolation Benefits

The dry-type isolation transformer operates through electromagnetic induction between physically separated windings. Because there is no direct electrical connection between input and output, it provides true galvanic isolation while efficiently transferring power.

This isolation delivers key benefits in industrial and commercial systems:
• Reduction of ground loop currents
• Suppression of electrical noise and EMI
• Protection of sensitive electronic equipment
• Improved overall power system reliability

Construction, Core Design & Materials

The 15 kVA dry-type isolation transformer is manufactured using high-quality laminated silicon steel cores to minimize core losses and vibration. Precision-wound copper or aluminum conductors provide stable current-carrying performance and excellent thermal characteristics.

Compared with oil-filled transformers, the dry-type design offers:
• No oil leakage or fire hazard
• Environmentally friendly operation
• Simplified installation and inspection
• Lower long-term maintenance costs

Typical Applications

The 15kVA isolation power transformer is widely used in:
• Industrial automation and control panels
• CNC machines and production equipment
• HVAC systems and building services
• Commercial lighting and power distribution
• Medical, laboratory, and testing equipment
• Imported machinery requiring voltage conversion

Project Case Study – Control Panel Power Solution

A system integrator required a 15kVA isolation transformer to step down 480V power to 220V for multiple industrial control panels. Due to limited installation space and strict safety requirements, an oil-filled transformer was not suitable.

A dry-type single phase isolation transformer with NEMA 1 enclosure was installed directly inside the electrical cabinet. After commissioning, the system achieved stable voltage output, reduced electrical interference, and reliable long-term operation. The customer later standardized this model across multiple projects.

Frequently Asked Questions (FAQ)

Q1: Is the 15kVA isolation transformer suitable for continuous operation?
Yes. With Class F or Class H insulation and dry-type AN cooling, it is designed for continuous industrial and commercial duty.
Q2: Is single phase or three phase available?
Yes. Both single phase and three phase configurations are available to match different load requirements.
Q3: Is this transformer safe for indoor installation?
Yes. The oil-free dry-type design makes it ideal for indoor electrical rooms, control panels, and commercial buildings.
Q4: Can the voltage be customized?
Yes. Standard input is 480V with 240V / 220V output, while other primary and secondary voltages are available upon request.
Q5: Does it provide electrical isolation?
Yes. The transformer provides full galvanic isolation to reduce electrical noise and protect downstream equipment.
Q6: What standards does it comply with?
Designed in accordance with ANSI, IEEE, and IEC standards. UL, cUL, CSA, and CE certifications are available.
Q7: Is it suitable for 50Hz and 60Hz systems?
Yes. The transformer supports both 50Hz and 60Hz power systems for global applications.
Q8: Do you support OEM and customization?
Yes. OEM, ODM, and private label customization are supported.
Q9: What capacity range do you manufacture?
We manufacture dry-type isolation transformers from 1 kVA to 5000 kVA, including common ratings such as 10kVA, 15kVA, 30kVA, 45kVA, 100kVA, 150kVA, and 400kVA.

Reliable Power Solutions from PowerNex

With its compact design, flexible configuration, and proven dry-type construction, the 15 kVA isolation power transformer provides a dependable solution for voltage conversion, electrical isolation, and power conditioning in industrial and commercial systems worldwide.

PowerNex supplies a full range of dry-type isolation transformers, including 5KVA,10kVA, 15kVA, 30kVA, 40kVA, 45kVA, 75kVA, 100kVA, 150kVA, 300kVA, 400kVA, 800kva and up to 5000kVA, available in both single phase and three phase designs.

Whether you need a standard model or a fully customized solution, our engineering team can tailor voltage ratings, connection types, enclosures, insulation systems, and certifications to meet your local standards and application needs.

👉 Contact PowerNex today to request technical support, drawings, or a competitive quotation and secure a safe, efficient, and long-term power solution for your project.

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