Comprehensive technical data for 1500 kVA dry transformers including dimensions, weight, full load amps, installation tips, and sizing guidance
Quick Specifications
| Rated Power: | 1500 kVA | Phase: | Three-Phase |
| Primary Voltage: | 480V | Secondary Voltage: | 208Y/120V |
| Weight: | 4500 lbs (2041 kg) | Efficiency: | 99.3% |
| Dimensions (H×W×D): | 84″ × 48″ × 42″ (2134 × 1219 × 1067 mm) | ||
A 1500 kVA transformer is commonly used in Major substations. This guide provides complete specifications to help engineers and purchasers select and install 1500 kVA transformers correctly.
1500 kVA Transformer Dimensions
| Dimension | Metric (mm) | Imperial (inches) |
|---|---|---|
| Height (H) | 2134 mm | 84″ |
| Width (W) | 1219 mm | 48″ |
| Depth (D) | 1067 mm | 42″ |
1500 kVA Transformer Weight
| Weight Type | Pounds (lbs) | Kilograms (kg) |
|---|---|---|
| Dry-Type Transformer | 4500 lbs | 2041 kg |
| Oil-Filled Equivalent* | ~6750 lbs | ~3061 kg |
| Shipping Weight (Approx.) | ~4950 lbs | ~2245 kg |
*Oil-filled transformer weight is estimated at approximately 1.5× dry-type weight.
Full Load Amps at Various Voltages
The following table shows calculated full load amperage for a 1500 kVA three-phase transformer:
| Voltage | Full Load Amps | Suggested Wire Size |
|---|---|---|
| 120V | 7217.1 A | 750 MCM+ |
| 208V | 4163.7 A | 750 MCM+ |
| 240V | 3608.5 A | 750 MCM+ |
| 277V | 3126.5 A | 750 MCM+ |
| 480V | 1804.3 A | 750 MCM+ |
| 600V | 1443.4 A | 750 MCM+ |
Three-Phase:
Amps = (kVA × 1000) ÷ (Voltage × 1.732)Example at 480V:
1804.3 A = (1500 × 1000) ÷ (480 × 1.732)Electrical Specifications
| Parameter | Value | Notes |
|---|---|---|
| Rated kVA | 1500 kVA | At rated voltage and frequency |
| Frequency | 60 Hz | 50 Hz available on request |
| No-Load Loss | 1200 W | Core/iron losses (typical) |
| Load Loss | 6500 W | Copper losses at 100% load |
| Total Losses | 7700 W | At 100% load |
| Impedance | 5.75% | ±7.5% tolerance per IEEE |
| Efficiency | 99.3% | At 100% load |
| Sound Level | ~70 dB | Per NEMA ST-20 (estimated) |
- Large transformers like this 1500 kVA unit generate significant heat. Verify room ventilation capacity before installation.
- Floor loading of 4500 lbs requires structural verification. Contact a structural engineer for slab-on-grade installations.
- Impedance matching is critical when paralleling transformers. Consult a power systems engineer.
- Arc flash hazard is significant at this capacity. Perform arc flash analysis and provide appropriate PPE.
When is a 1500 kVA Three-Phase Transformer the Right Choice?
A 1500 kVA three-phase transformer represents significant infrastructure:
- Large industrial plants and heavy manufacturing
- High-rise commercial buildings
- Utility substation distribution
- Data center primary power
- Campus-style power distribution
Infrastructure Requirements:
- Dedicated transformer pad or vault required
- Primary metering typically required at this capacity
- Coordination study with utility protection schemes essential
- Consider on-load tap changer (OLTC) for voltage regulation
Typical Load Examples for 1500 kVA
Example load distribution for a 1500 kVA installation:
| Load Type | Estimated Demand |
|---|---|
| Large process motors | 450 kVA |
| HVAC central plant | 300 kVA |
| Building lighting | 150 kVA |
| Elevator systems | 150 kVA |
| Production equipment | 300 kVA |
| Auxiliary loads | 150 kVA |
Note: Actual loads vary. Always perform a detailed load calculation for your specific application.
Related Transformer Sizes
Compare with adjacent kVA ratings:
| kVA Rating | Link |
|---|---|
| 1000 kVA Three-Phase | 1000 kVA Specifications → |
| 1500 kVA Three-Phase | Current Page |
| 2000 kVA Three-Phase | 2000 kVA Specifications → |
Frequently Asked Questions
What are the dimensions of a 1500 kVA transformer?
A typical 1500 kVA dry three-phase transformer measures approximately 84″ H × 48″ W × 42″ D (2134 × 1219 × 1067 mm). Dimensions vary by manufacturer.
How much does a 1500 kVA transformer weigh?
A 1500 kVA dry transformer typically weighs around 4500 lbs (2041 kg). Oil-filled transformers of the same rating weigh approximately 6750 lbs.
What is the full load amperage of a 1500 kVA transformer at 480V?
At 480V, a 1500 kVA three-phase transformer has a full load current of 1804.3 amps.
What loads can a 1500 kVA transformer handle?
A 1500 kVA transformer can supply up to 1500 kVA of apparent power. For typical loads with 0.85 power factor, this equals approximately 1275.0 kW of real power.
Related Resources
- Transformer Sizing Chart – Compare all kVA ratings with dimensions & weights
- Transformer Full Load Amps Chart – FLA reference for all voltages
Related Articles
- Three Phase Transformer: Complete Guide
- Transformer Testing: Complete Guide
- Transformer Protection: Complete Guide
Standards & References
- IEEE C57.12.01 – General Requirements for Dry-Type Transformers
- IEEE C57.12.91 – Test Code for Dry-Type Transformers
- NEMA TP-1 – Guide for Determining Energy Efficiency
- DOE 10 CFR 431 – Energy Conservation Standards
Disclaimer: Specifications shown are typical reference values compiled from multiple industry sources. Actual specifications vary significantly by manufacturer, model, enclosure type, and configuration. Always consult manufacturer datasheets for exact specifications before ordering or installation. Data accuracy verified using standard electrical engineering formulas. Last updated: January 2026