Motor Starter Selection Calculator – Choose Between DOL, Star-Delta or Soft Starter

Use this free Motor Starter Selection Calculator to determine the most suitable starter type for your motor application. Based on your motor power, voltage, load type, starting torque, and frequency of starts, this tool will recommend whether a DOL (Direct-On-Line), Star-Delta, or Soft Starter is best.

When to Use a DOL, Star-Delta or Soft Starter?

Choosing the right motor starter is essential to ensure safe, efficient starting of electric motors. Here’s a quick overview:

• DOL Starter: Best for small motors with low inertia loads and minimal starting torque.
• Star-Delta Starter: Suitable for medium motors where current reduction during startup is needed.
• Soft Starter: Ideal for high-power motors, heavy inertia loads, or where torque control is critical.

This tool evaluates your inputs and recommends the right starter automatically — saving time and avoiding costly missteps.

How to Use the Calculator

• ⚡ Enter your motor power in kW
• 🔌 Select your supply voltage (e.g., 400V, 415V)
• 🔁 Enter how many starts per hour the motor performs
• ⚙️ Choose your load type (light, medium, or heavy inertia)
• 🎯 Specify the starting torque requirement
• ✅ Click Calculate to view the recommended starter

The result includes a summary of your selection and a direct link to speak with our technical team if you need help choosing the right product.

Need Help Sourcing the Right Starter?

We stock a wide range of Soft Starters, Star-Delta Starters and DOL Motor Starters from leading brands like ABB, Schneider, Allen Bradley, and Siemens — all with 2-year warranty and next-day UK delivery.

📞 Need help? Contact Drive Outlet Megastore today.

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Drive Outlet Megastore is the UK’s most trusted source for industrial automation tools, calculators, and OEM electrical components — helping engineers and installers select the right solution every time.