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Reactive vs. Resistive Load Testing: Understanding the Differences

Load testing is a crucial step in verifying the performance and reliability of power systems. When it comes to load banks, reactive and resistive testing serve different purposes. Understanding their differences helps ensure accurate testing for your specific application.

What is Resistive Load Testing?

Resistive load banks apply a purely resistive load to a power source, simulating common electrical devices like lighting, heaters, and appliances. This type of testing measures a generator’s ability to handle a full kW load at unity power factor (1.0), ensuring it can produce and sustain the required power output.

Key Benefits of Resistive Testing:
✔️ Simulates real-world electrical loads
✔️ Tests power capacity at full load
✔️ Ensures voltage and frequency stability

What is Reactive Load Testing?

Reactive load banks test both inductive and capacitive loads, simulating motor-driven equipment like compressors, pumps, and transformers. This type of testing evaluates how a power system handles reactive power (kVAR) at a lower power factor, usually 0.8 or lower.

Key Benefits of Reactive Testing:
✔️ Tests power systems for industrial and commercial loads
✔️ Simulates real-world inductive loads for motor-driven applications
✔️ Ensures generators can handle complex power demands

Which Load Test is Right for You?

  • Use resistive load testing for general power verification, ensuring your generator or UPS can handle full-rated kW loads.
  • Use reactive load testing when your system powers motor-driven or inductive loads, ensuring proper performance under real-world conditions.

Complete Load Testing Solutions at RTS Rentals

At RTS Rentals, we offer both resistive and reactive loadbanks for rent and purchase, helping you conduct accurate, industry-specific testing. Whether you’re commissioning a data center, industrial facility, or backup power system, we have the right equipment to ensure reliable results.

📞 Contact us today to discuss your testing needs!

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