UN 1500trasformatore kVA is a widely used power transformer in industrial, commerciale, e progetti infrastrutturali. 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, applicazioni, and a full specification table to help you choose the right model.

What Is a 1500kVA Transformer?
UN 1500trasformatore kVA is an electrical device with a rated apparent power of 1500 kilovolt-ampere (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: induzione elettromagnetica.
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:
- Rapporto di tensione = rapporto di spire
- La potenza rimane quasi costante (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. Trasformatore immerso nell'olio
- Uses mineral oil for cooling
- High efficiency
- Lunga durata
- Suitable for outdoor use
2. Trasformatore a secco
- Raffreddato ad aria (niente olio)
- Safe and eco-friendly
- Used indoors (edifici, hospitals)
3. Trasformatore in resina colata
- Resin insulation
- High fire resistance
- Bassa manutenzione
Main Components of a 1500kVA Transformer
A typical 1500kVA transformer includes:
- Nucleo – Made of silicon steel sheets
- Windings – Copper or aluminum
- Insulation system
- Cooling system (oil or air)
- Tank and enclosure
- Boccole
- Tap changer
Each part ensures stable operation and safety.

Standard Voltage Levels
A 1500kVA transformer can be designed for different voltage systems:
Tensioni primarie comuni:
- 33kV
- 22kV
- 11kV
- 6.6kV
Tensioni secondarie comuni:
- 415V
- 400V
- 380V
- 220V
Full Specifications of 1500kVA Transformer
Below is a comprehensive specification table covering typical configurations.
Technical Specification Table
| Articolo | Parametro | Valore |
|---|---|---|
| Rated Power | Capacità | 1500kva |
| Frequenza | Standard | 50Hz / 60Hz |
| Fase | Tipo | Trifase |
| Cooling Type | Opzioni | ONAN / ACCESO SPENTO / UN |
| Insulation Class | Standard | Classe A / F / H |
| Gruppo vettoriale | Comune | Din11 / Sì0 |
| Impedenza | Tipico | 5% – 8% |
| Efficienza | At full load | ≥ 98% |
| Aumento della temperatura | Olio / Avvolgimento | 55°C / 65°C |
| Tocca Cambia | Tipo | Scaricare / A carico |
| Livello di rumore | Tipico | ≤ 60 dB |
| Protection Class | Allegato | IP23 / IP54 |
Conductor and Current Ratings
The output current depends on voltage.
Example (400V output):
- Current = 1500 × 1000 ÷ (√3 × 400)
- ≈ 2165 UN
Tabella corrente
| Tensione secondaria | Attuale (UN) |
|---|---|
| 415V | ~2088 A |
| 400V | ~2165 A |
| 380V | ~2279 A |
| 220V | ~3939 A |
Dimensioni e peso (Tipico)
| Parametro | Valore |
|---|---|
| Lunghezza | 1800 – 2400 mm |
| Larghezza | 1200 – 1800 mm |
| Altezza | 1600 – 2200 mm |
| Peso totale | 2500 – 5000 kg |
| Peso dell'olio (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 di perdita tipici
| Tipo | Valore |
|---|---|
| Perdita a vuoto | 1.5 – 2.5 kW |
| Perdita di carico | 10 – 18 kW |
Lower losses mean higher efficiency.

Applications of 1500kVA Transformer
A 1500kVA transformer is used in many fields:
Industrial Use
- Impianti di produzione
- Fabbriche di trasformazione alimentare
- Textile industries
Commercial Use
- Centri commerciali
- Edifici per uffici
- Hotels
Infrastructure
- Ospedali
- Aeroporti
- Centri dati
Settore energetico
- Solar power systems
- Parchi eolici
- Sottostazioni
Advantages of Using a 1500kVA Transformer
Alta capacità
- Supports large loads
- Ideal for expansion projects
Efficienza energetica
- Low losses
- Saves electricity costs
Affidabilità
- Stable voltage output
- Lunga durata
Flessibilità
- Works with many voltage systems
- Customizable design
Linee guida per l'installazione
Proper installation is important for safety and performance.
Punti chiave:
- Install on a solid foundation
- Ensure proper ventilation
- Maintain safe clearance
- Use correct grounding
- Proteggere dall'umidità e dalla polvere
For oil transformers:
- Check oil level regularly
- Avoid leaks
Suggerimenti per la manutenzione
Regular maintenance increases lifespan.
Routine Checks:
- Ispezionare l'isolamento
- Check temperature
- Monitor noise
- Test oil quality
Programma consigliato:
- Monthly visual check
- Annual full inspection
How to Choose the Right 1500kVA Transformer
Quando si seleziona un trasformatore, considerare:
1. Load Requirement
- Calculate total load
- Add safety margin
2. Livello di tensione
- Match your system voltage
3. Ambiente di installazione
- Interno → Tipo a secco
- Outdoor → Oil type
4. Metodo di raffreddamento
- Natural or forced cooling
5. Standard
- CEI / ANSI / GB compliance
Common Standards for 1500kVA Transformers
- CEI 60076
- ANSI C57
- GB/T 1094
These standards ensure quality and safety.
Cost Factors of 1500kVA Transformer
The price depends on:
- Materiale (rame contro alluminio)
- Tipo di raffreddamento
- Brand and manufacturer
- Custom specifications
- Accessori (protezione, monitoraggio)
Typical price range:
- $10,000 – $40,000 (varies widely)
Domande frequenti
1. Is 1500kVA suitable for a factory?
SÌ, it is ideal for medium-sized factories.
2. What is the lifespan?
Usually 20–30 anni con una corretta manutenzione.
3. Può essere utilizzato all'aperto?
SÌ, especially oil-immersed types.
4. What protection is needed?
- Overcurrent protection
- Temperature protection
- Surge protection
1500kVA transformer manufacturer
UN 1500trasformatore kVA is a reliable and efficient solution for medium to large power needs. It is widely used across industries due to its high capacity, flessibilità, e durata.
By understanding its specifications, applicazioni, 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.


