Comprehensive technical data for 112.5 kVA dry transformers including dimensions, weight, full load amps, installation tips, and sizing guidance
Quick Specifications
| Rated Power: | 112.5 kVA | Phase: | Three-Phase |
| Primary Voltage: | 480V | Secondary Voltage: | 208Y/120V |
| Weight: | 650 lbs (295 kg) | Efficiency: | 98.8% |
| Dimensions (H×W×D): | 47″ × 26″ × 22″ (1194 × 660 × 559 mm) | ||
A 112.5 kVA transformer is commonly used in Industrial facilities. This guide provides complete specifications to help engineers and purchasers select and install 112.5 kVA transformers correctly.
112.5 kVA Transformer Dimensions
| Dimension | Metric (mm) | Imperial (inches) |
|---|---|---|
| Height (H) | 1194 mm | 47″ |
| Width (W) | 660 mm | 26″ |
| Depth (D) | 559 mm | 22″ |
112.5 kVA Transformer Weight
| Weight Type | Pounds (lbs) | Kilograms (kg) |
|---|---|---|
| Dry-Type Transformer | 650 lbs | 295 kg |
| Oil-Filled Equivalent* | ~975 lbs | ~442 kg |
| Shipping Weight (Approx.) | ~715 lbs | ~324 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 112.5 kVA three-phase transformer:
| Voltage | Full Load Amps | Suggested Wire Size |
|---|---|---|
| 120V | 541.3 A | 750 MCM+ |
| 208V | 312.3 A | 500 MCM |
| 240V | 270.6 A | 350 MCM |
| 277V | 234.5 A | 300 MCM |
| 480V | 135.3 A | 2/0 AWG |
| 600V | 108.3 A | #1 AWG |
Three-Phase:
Amps = (kVA × 1000) ÷ (Voltage × 1.732)Example at 480V:
135.3 A = (112.5 × 1000) ÷ (480 × 1.732)Electrical Specifications
| Parameter | Value | Notes |
|---|---|---|
| Rated kVA | 112.5 kVA | At rated voltage and frequency |
| Frequency | 60 Hz | 50 Hz available on request |
| No-Load Loss | 230 W | Core/iron losses (typical) |
| Load Loss | 950 W | Copper losses at 100% load |
| Total Losses | 1180 W | At 100% load |
| Impedance | 4.5% | ±7.5% tolerance per IEEE |
| Efficiency | 98.8% | At 100% load |
| Sound Level | ~42 dB | Per NEMA ST-20 (estimated) |
- Large transformers like this 112.5 kVA unit generate significant heat. Verify room ventilation capacity before installation.
- Floor loading of 650 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.
When is a 112.5 kVA Three-Phase Transformer the Right Choice?
A 112.5 kVA three-phase transformer is designed for:
- Medium industrial facilities and machine shops
- Multi-story commercial buildings
- Large HVAC central plant systems
- Printing and packaging operations
- Food processing facilities
Capacity Planning:
At 112.5 kVA, you can support approximately 67 HP of combined motor load at 80% efficiency and 0.85 power factor.
Typical Load Examples for 112.5 kVA
Example load distribution for a 112.5 kVA installation:
| Load Type | Estimated Demand |
|---|---|
| Process motors | 39 kVA |
| HVAC chillers | 28 kVA |
| Lighting systems | 13 kVA |
| Welding equipment | 16 kVA |
| Support systems | 14 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 |
|---|---|
| 75 kVA Three-Phase | 75 kVA Specifications → |
| 112.5 kVA Three-Phase | Current Page |
| 150 kVA Three-Phase | 150 kVA Specifications → |
Frequently Asked Questions
What are the dimensions of a 112.5 kVA transformer?
A typical 112.5 kVA dry three-phase transformer measures approximately 47″ H × 26″ W × 22″ D (1194 × 660 × 559 mm). Dimensions vary by manufacturer.
How much does a 112.5 kVA transformer weigh?
A 112.5 kVA dry transformer typically weighs around 650 lbs (295 kg). Oil-filled transformers of the same rating weigh approximately 975 lbs.
What is the full load amperage of a 112.5 kVA transformer at 480V?
At 480V, a 112.5 kVA three-phase transformer has a full load current of 135.3 amps.
What loads can a 112.5 kVA transformer handle?
A 112.5 kVA transformer can supply up to 112.5 kVA of apparent power. For typical loads with 0.85 power factor, this equals approximately 95.6 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