أ 1500kVA transformer is a widely used power transformer in industrial, تجاري, ومشاريع البنية التحتية. It plays a key role in stepping voltage up or down to ensure stable and efficient power distribution. Whether you are planning a factory, a data center, or a large building, understanding the features and specifications of a 1500kVA transformer is essential.
It includes working principles, types, التطبيقات, and a full specification table to help you choose the right model.

What Is a 1500kVA Transformer?
أ 1500kVA transformer is an electrical device with a rated apparent power of 1500 kilovolt-amperes (كيلو فولت أمبير). It transfers electrical energy between circuits using electromagnetic induction.
- 1500kVA = 1.5MVA
- It can supply medium to large loads
- Common in industrial plants and commercial buildings
The transformer changes voltage levels while keeping the frequency the same.
How Does a 1500kVA Transformer Work?
The transformer works based on a simple idea: electromagnetic induction.
Basic Working Steps:
- AC power flows into the primary winding
- It creates a magnetic field in the core
- The magnetic field induces voltage in the secondary winding
- Output voltage depends on the turns ratio
Key Formula:
- Voltage ratio = Turns ratio
- Power remains nearly constant (ignoring losses)
This allows safe and efficient power transmission.

Types of 1500kVA Transformers
There are several types of 1500kVA transformers based on cooling and insulation.
1. Oil-Immersed Transformer
- Uses mineral oil for cooling
- High efficiency
- عمر خدمة طويل
- Suitable for outdoor use
2. Dry-Type Transformer
- Air-cooled (no oil)
- Safe and eco-friendly
- Used indoors (المباني, المستشفيات)
3. Cast Resin Transformer
- Resin insulation
- High fire resistance
- Low maintenance
Main Components of a 1500kVA Transformer
A typical 1500kVA transformer includes:
- Core – Made of silicon steel sheets
- Windings – Copper or aluminum
- Insulation system
- Cooling system (oil or air)
- Tank and enclosure
- Bushings
- Tap changer
Each part ensures stable operation and safety.

Standard Voltage Levels
A 1500kVA transformer can be designed for different voltage systems:
Common Primary Voltages:
- 33كيلو فولت
- 22كيلو فولت
- 11كيلو فولت
- 6.6كيلو فولت
Common Secondary Voltages:
- 415الخامس
- 400الخامس
- 380الخامس
- 220الخامس
Full Specifications of 1500kVA Transformer
Below is a comprehensive specification table covering typical configurations.
Technical Specification Table
| Item | المعلمة | Value |
|---|---|---|
| Rated Power | Capacity | 1500كيلو فولت أمبير |
| تكرار | Standard | 50هرتز / 60هرتز |
| Phase | يكتب | Three-phase |
| Cooling Type | Options | ONAN / ONAF / AN |
| Insulation Class | Standard | Class A / F / H |
| Vector Group | Common | Dyn11 / Yyn0 |
| Impedance | Typical | 5% - 8% |
| Efficiency | At full load | ≥ 98% |
| Temperature Rise | زيت / Winding | 55درجة مئوية / 65درجة مئوية |
| Tap Changer | يكتب | Off-load / On-load |
| Noise Level | Typical | ≥ 60 dB |
| Protection Class | Enclosure | IP23 / IP54 |
Conductor and Current Ratings
The output current depends on voltage.
Example (400V output):
- Current = 1500 × 1000 ÷ (√3 × 400)
- ≈ 2165 أ
Current Table
| Secondary Voltage | Current (أ) |
|---|---|
| 415الخامس | ~2088 A |
| 400الخامس | ~2165 A |
| 380الخامس | ~2279 A |
| 220الخامس | ~3939 A |
Dimensions and Weight (Typical)
| المعلمة | Value |
|---|---|
| Length | 1800 - 2400 مم |
| Width | 1200 - 1800 مم |
| Height | 1600 - 2200 مم |
| Total Weight | 2500 - 5000 kg |
| Oil Weight (if applicable) | 800 - 1500 kg |
ملحوظة: Values vary by manufacturer and design.
Losses in a 1500kVA Transformer
Transformers have two main losses:
1. No-Load Loss (Core Loss)
- Occurs even without load
- Depends on core material
2. Load Loss (Copper Loss)
- Increases with current
- Depends on winding resistance
Typical Loss Values
| يكتب | Value |
|---|---|
| No-load loss | 1.5 - 2.5 kW |
| Load loss | 10 - 18 kW |
Lower losses mean higher efficiency.

Applications of 1500kVA Transformer
A 1500kVA transformer is used in many fields:
Industrial Use
- Manufacturing plants
- Food processing factories
- Textile industries
Commercial Use
- Shopping malls
- Office buildings
- Hotels
Infrastructure
- Hospitals
- Airports
- Data centers
قطاع الطاقة
- Solar power systems
- Wind farms
- Substations
Advantages of Using a 1500kVA Transformer
قدرة عالية
- Supports large loads
- Ideal for expansion projects
كفاءة الطاقة
- Low losses
- Saves electricity costs
مصداقية
- Stable voltage output
- عمر خدمة طويل
المرونة
- Works with many voltage systems
- Customizable design
إرشادات التثبيت
Proper installation is important for safety and performance.
Key Points:
- Install on a solid foundation
- Ensure proper ventilation
- Maintain safe clearance
- Use correct grounding
- Protect from moisture and dust
For oil transformers:
- Check oil level regularly
- Avoid leaks
Maintenance Tips
Regular maintenance increases lifespan.
Routine Checks:
- Inspect insulation
- Check temperature
- Monitor noise
- Test oil quality
Recommended Schedule:
- Monthly visual check
- Annual full inspection
How to Choose the Right 1500kVA Transformer
When selecting a transformer, يعتبر:
1. Load Requirement
- Calculate total load
- Add safety margin
2. مستوى الجهد
- Match your system voltage
3. بيئة التثبيت
- Indoor → Dry-type
- Outdoor → Oil type
4. Cooling Method
- Natural or forced cooling
5. المعايير
- اللجنة الانتخابية المستقلة / ANSI / GB compliance
Common Standards for 1500kVA Transformers
- اللجنة الانتخابية المستقلة 60076
- ANSI C57
- جيجابايت/ت 1094
These standards ensure quality and safety.
Cost Factors of 1500kVA Transformer
The price depends on:
- مادة (copper vs aluminum)
- Cooling type
- Brand and manufacturer
- Custom specifications
- Accessories (حماية, monitoring)
Typical price range:
- $10,000 - $40,000 (varies widely)
Frequently Asked Questions
1. Is 1500kVA suitable for a factory?
Yes, it is ideal for medium-sized factories.
2. What is the lifespan?
Usually 20–30 years with proper maintenance.
3. Can it be used outdoors?
Yes, especially oil-immersed types.
4. What protection is needed?
- Overcurrent protection
- Temperature protection
- Surge protection
1500kVA transformer manufacturer
أ 1500kVA transformer is a reliable and efficient solution for medium to large power needs. It is widely used across industries due to its high capacity, flexibility, والمتانة.
By understanding its specifications, التطبيقات, and maintenance requirements, you can choose the right transformer for your project and ensure long-term performance.
We DOS Group Comany are 1500kVA transformer manufacturer.


