A 1500transformator kVA is a widely used power transformer in industrial, comercial, și proiecte de infrastructură. 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, aplicatii, and a full specification table to help you choose the right model.

What Is a 1500kVA Transformer?
A 1500transformator kVA is an electrical device with a rated apparent power of 1500 kilovolt-amperi (kVA). 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: inducție electromagnetică.
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:
- Raportul tensiunii = Raportul spirelor
- Puterea rămâne aproape constantă (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. Transformator cu scufundare în ulei
- Uses mineral oil for cooling
- High efficiency
- Durată lungă de viață
- Suitable for outdoor use
2. Transformator de tip uscat
- Răcit cu aer (fara ulei)
- Safe and eco-friendly
- Used indoors (cladiri, hospitals)
3. Transformator din rasina turnata
- Resin insulation
- High fire resistance
- Low maintenance
Main Components of a 1500kVA Transformer
A typical 1500kVA transformer includes:
- Miez – 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:
Tensiuni primare comune:
- 33kV
- 22kV
- 11kV
- 6.6kV
Tensiuni secundare comune:
- 415V
- 400V
- 380V
- 220V
Full Specifications of 1500kVA Transformer
Below is a comprehensive specification table covering typical configurations.
Technical Specification Table
| Articol | Parametru | Valoare |
|---|---|---|
| Rated Power | Capacity | 1500kVA |
| Frecvenţă | Standard | 50Hz / 60Hz |
| Fază | Tip | Trifazat |
| Cooling Type | Opțiuni | ONAN / ON OFF / UN |
| Insulation Class | Standard | Clasa A / F / H |
| Grup de vectori | Comun | Dyn11 / Da0 |
| Impedance | Tipic | 5% – 8% |
| Eficienţă | At full load | ≥ 98% |
| Creșterea temperaturii | Ulei / Înfășurare | 55°C / 65°C |
| Atingeți Schimbător | Tip | Descarcat / În sarcină |
| Nivel de zgomot | Tipic | ≤ 60 dB |
| Protection Class | Incinta | IP23 / IP54 |
Conductor and Current Ratings
The output current depends on voltage.
Example (400V output):
- Current = 1500 × 1000 ÷ (√3 × 400)
- ≈ 2165 A
Tabelul curent
| Tensiune secundară | Actual (A) |
|---|---|
| 415V | ~2088 A |
| 400V | ~2165 A |
| 380V | ~2279 A |
| 220V | ~3939 A |
Dimensiuni si Greutate (Tipic)
| Parametru | Valoare |
|---|---|
| Lungime | 1800 – 2400 mm |
| Lăţime | 1200 – 1800 mm |
| Înălţime | 1600 – 2200 mm |
| Greutate totală | 2500 – 5000 kg |
| Greutatea uleiului (if applicable) | 800 – 1500 kg |
Nota: 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
Valori tipice de pierdere
| Tip | Valoare |
|---|---|
| Pierdere fără sarcină | 1.5 – 2.5 kW |
| Pierdere de sarcină | 10 – 18 kW |
Lower losses mean higher efficiency.

Applications of 1500kVA Transformer
A 1500kVA transformer is used in many fields:
Industrial Use
- Uzini de productie
- Fabrici de prelucrare a alimentelor
- Textile industries
Commercial Use
- Mall-uri
- Clădiri de birouri
- Hotels
Infrastructure
- Spitale
- Aeroporturi
- Centre de date
Sectorul Energetic
- Solar power systems
- Wind farms
- Substații
Advantages of Using a 1500kVA Transformer
Capacitate mare
- Supports large loads
- Ideal for expansion projects
Eficiență energetică
- Low losses
- Saves electricity costs
Fiabilitate
- Stable voltage output
- Durată lungă de viață
Flexibilitate
- Works with many voltage systems
- Customizable design
Ghid de instalare
Proper installation is important for safety and performance.
Puncte cheie:
- Install on a solid foundation
- Ensure proper ventilation
- Maintain safe clearance
- Use correct grounding
- Protejați de umiditate și praf
For oil transformers:
- Check oil level regularly
- Avoid leaks
Sfaturi de întreținere
Regular maintenance increases lifespan.
Routine Checks:
- Verificați izolația
- Check temperature
- Monitor noise
- Test oil quality
Program recomandat:
- Monthly visual check
- Annual full inspection
How to Choose the Right 1500kVA Transformer
When selecting a transformer, considera:
1. Load Requirement
- Calculate total load
- Add safety margin
2. Nivel de tensiune
- Match your system voltage
3. Mediul de instalare
- Interior → Tip uscat
- Outdoor → Oil type
4. Metoda de răcire
- Natural or forced cooling
5. Standarde
- IEC / ANSI / GB compliance
Common Standards for 1500kVA Transformers
- IEC 60076
- ANSI C57
- GB/T 1094
These standards ensure quality and safety.
Cost Factors of 1500kVA Transformer
The price depends on:
- Material (cupru vs aluminiu)
- Tip de răcire
- Brand and manufacturer
- Custom specifications
- Accessories (protection, monitorizare)
Typical price range:
- $10,000 – $40,000 (varies widely)
Întrebări frecvente
1. Is 1500kVA suitable for a factory?
Da, it is ideal for medium-sized factories.
2. What is the lifespan?
Usually 20–30 de ani cu intretinere corespunzatoare.
3. Poate fi folosit in aer liber?
Da, especially oil-immersed types.
4. What protection is needed?
- Overcurrent protection
- Temperature protection
- Surge protection
1500kVA transformer manufacturer
A 1500transformator kVA is a reliable and efficient solution for medium to large power needs. It is widely used across industries due to its high capacity, flexibilitate, si durabilitate.
By understanding its specifications, aplicatii, 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.


