Sizing Wizard
Welcome to our phase converter selection tool. Select your equipment from the dropdown below, and we'll help determine the right size phase converter based on typical load categories. We recommend NL models for your needs. Additionally, for larger setups, DualZone models are available as an option. DualZone phase converters are sometimes necessary because they might not have enough utility service to start a single larger converter, by dividing the starting process into zones. The service kVA should be higher than or equal to the converter HP for reliable operation.
Step 1: Select Your Equipment
Choose the equipment you plan to run:
Step 2: Optional Sizing Recommendation by Technician
For an optional sizing recommendation by a phase converter technician, generate a quote here: Generate Quote
Resistive Load Selector
If you have a resistive load, enter the amps below to get a recommendation (1 HP per amp):
Learn More About DualZone Phase Converters
Watch this video to learn more about how the DualZone phase converter works:
Detailed Sizing Guide
Phase converters are sized based on load type, with specific multipliers:
| Load Type | Multiplier | Examples |
|---|---|---|
| Easy Load | 1x | Saws, Drill Press, Milling Machines |
| Medium Load | 1.5x | Mixers, Small Lathes |
| Hard Load | 2x | Lathes, CNC Machines, Pumps, Press Brake, Wide Belt Sander |
| Very Hard Load | 2.5x | Air Compressors, HVAC, Fans, Hydraulic Presses |
| Resistive Loads | 1 HP per Amp | Welders, Battery Chargers, Ovens |
Sized by the largest load, calculated by a professional, typically based on total HP of equipment running simultaneously.
Check utility power at the main breaker panel or determine the size of the utility transformer (e.g., 15 KVA, 25 KVA, 50 KVA, etc.), as KVA indicates available amperage. Ensure KVA is larger than the HP of the phase converter; for example, a 50 KVA (200 amps) service cannot start a 60 HP converter, but a DualZone 30/60 can be used for 60 HP total. For high voltage (460-480V) single-phase power, consult a sales representative.
Safety and compliance with state/local regulations are emphasized, with UL-listed phase converters recommended. If power is insufficient for starting but adequate for running, DualZone Phase Converters can be utilized. Converters can be expanded by pairing multiple units (e.g., a 30 HP and 20 HP converter can make a 50 HP system). Professional sizing assistance is available by calling 888-379-3481 or emailing for multiple equipment setups.
Additional Notes
- If your equipment isn't listed, contact support for assistance.
- Ensure your utility power can support the converter (e.g., breaker panel size should exceed converter HP).
- For high voltage (460V+) or complex setups, contact support.
- This is a general guide; for precise needs, call us at [Your Phone Number] or email [Your Email].
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