Delta VFD Knowledge Centre

Expert guides on variable frequency drives — buying, installation, troubleshooting, and industrial applications.

✓ Buying Guides ✓ Installation Guides ✓ Fault Codes ✓ Product Comparisons ✓ Application Guides

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Series Guide ⏱ 7 min read

Compare Delta VFD series — EL, EL-W, VFD-E, ME300, MS300, MH300, and VP3000 — by power range, input phase, control mode, and application. Bu

Comparison ⏱ 5 min read

Compare Delta ME300 vs MS300 vs MH300 VFDs. Find the right drive for your motor, budget, and application. Get up to 40% off list price with

Comparison ⏱ 1 min read

Compare Delta EL Series and MS300 Series VFDs across features, applications, price, and specifications to make the right purchase decision.

Popular: ME300 MS300 MH300 Single Phase VFD Water Pump Compressor Fault Codes PID Control VFD Sizing Energy Saving

Browse drives by series — or shop by HP/kW rating

Calculators and reference tools for VFD selection and sizing

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VFD Size Calculator

Enter motor kW and load type — get the right VFD rating and model recommendations

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HP ↔ kW Converter

Instantly convert between horsepower and kilowatts for motor sizing

Coming soon

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Motor Current Calculator

Calculate full-load current from motor kW, voltage, and power factor

Coming soon

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Energy Saving Calculator

Estimate annual electricity savings and ROI from installing a VFD on pump/fan loads

Coming soon

Our engineers provide free application guidance — motor sizing, series selection, parameter configuration.