Comprehensive technical data for 500 kVA dry transformers including dimensions, weight, full load amps, installation tips, and sizing guidance
Quick Specifications
| Rated Power: | 500 kVA | Phase: | Three-Phase |
| Primary Voltage: | 480V | Secondary Voltage: | 208Y/120V |
| Weight: | 1900 lbs (862 kg) | Efficiency: | 99.1% |
| Dimensions (H×W×D): | 64″ × 36″ × 32″ (1626 × 914 × 813 mm) | ||
A 500 kVA transformer is commonly used in Large industrial, utility. This guide provides complete specifications to help engineers and purchasers select and install 500 kVA transformers correctly.
500 kVA Transformer Dimensions
| Dimension | Metric (mm) | Imperial (inches) |
|---|---|---|
| Height (H) | 1626 mm | 64″ |
| Width (W) | 914 mm | 36″ |
| Depth (D) | 813 mm | 32″ |
500 kVA Transformer Weight
| Weight Type | Pounds (lbs) | Kilograms (kg) |
|---|---|---|
| Dry-Type Transformer | 1900 lbs | 862 kg |
| Oil-Filled Equivalent* | ~2850 lbs | ~1293 kg |
| Shipping Weight (Approx.) | ~2090 lbs | ~948 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 500 kVA three-phase transformer:
| Voltage | Full Load Amps | Suggested Wire Size |
|---|---|---|
| 120V | 2405.7 A | 750 MCM+ |
| 208V | 1387.9 A | 750 MCM+ |
| 240V | 1202.8 A | 750 MCM+ |
| 277V | 1042.2 A | 750 MCM+ |
| 480V | 601.4 A | 750 MCM+ |
| 600V | 481.1 A | 750 MCM+ |
Three-Phase:
Amps = (kVA × 1000) ÷ (Voltage × 1.732)Example at 480V:
601.4 A = (500 × 1000) ÷ (480 × 1.732)Electrical Specifications
| Parameter | Value | Notes |
|---|---|---|
| Rated kVA | 500 kVA | At rated voltage and frequency |
| Frequency | 60 Hz | 50 Hz available on request |
| No-Load Loss | 580 W | Core/iron losses (typical) |
| Load Loss | 2800 W | Copper losses at 100% load |
| Total Losses | 3380 W | At 100% load |
| Impedance | 5.75% | ±7.5% tolerance per IEEE |
| Efficiency | 99.1% | At 100% load |
| Sound Level | ~50 dB | Per NEMA ST-20 (estimated) |
- Large transformers like this 500 kVA unit generate significant heat. Verify room ventilation capacity before installation.
- Floor loading of 1900 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 500 kVA Three-Phase Transformer the Right Choice?
A 500 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 500 kVA
Example load distribution for a 500 kVA installation:
| Load Type | Estimated Demand |
|---|---|
| Process motors | 175 kVA |
| HVAC chillers | 125 kVA |
| Lighting systems | 60 kVA |
| Welding equipment | 75 kVA |
| Support systems | 65 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 |
|---|---|
| 300 kVA Three-Phase | 300 kVA Specifications → |
| 500 kVA Three-Phase | Current Page |
| 750 kVA Three-Phase | 750 kVA Specifications → |
Frequently Asked Questions
What are the dimensions of a 500 kVA transformer?
A typical 500 kVA dry three-phase transformer measures approximately 64″ H × 36″ W × 32″ D (1626 × 914 × 813 mm). Dimensions vary by manufacturer.
How much does a 500 kVA transformer weigh?
A 500 kVA dry transformer typically weighs around 1900 lbs (862 kg). Oil-filled transformers of the same rating weigh approximately 2850 lbs.
What is the full load amperage of a 500 kVA transformer at 480V?
At 480V, a 500 kVA three-phase transformer has a full load current of 601.4 amps.
What loads can a 500 kVA transformer handle?
A 500 kVA transformer can supply up to 500 kVA of apparent power. For typical loads with 0.85 power factor, this equals approximately 425.0 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