In power generation, backup power systems, and industrial electrical testing, Load Banks play an important role in verifying the performance and reliability of generators, UPS systems, and power equipment. However, not all load banks are the same. The two most commonly used types are Resistive load banks and Inductive load banks. While both are used to apply electrical load, they simulate different types of real-world electrical conditions.

What is a Resistive Load Bank?

A Resistive load bank applies a pure resistive load, meaning it converts electrical energy directly into heat. This is similar to how common electrical devices like heaters or incandescent lamps work.

How It Works:

It uses heating elements (resistors) to draw power.

The current and voltage remain in phase.

Power Factor = 1.0

What It Tests:

The full rated kW output of the generator or power source.

Performance of the engine, alternator, fuel system, and cooling system.

Typical Applications:

Data centers

Hospitals

Manufacturing facilities

Generator commissioning and maintenance

What is an Inductive Load Bank?

An Inductive Load Bank introduces reactive load into the circuit, simulating equipment that has coils or magnetic fields, such as motors and transformers.

How It Works:

It uses inductors (coils) to create a lagging power factor.

Voltage and current are out of phase.

Power Factor is typically 0.8 lagging.

What It Tests:

The generator’s ability to handle reactive power (kVAR).

The stability and behavior of the alternator under non-linear load conditions.

Typical Applications:

Industrial plants with large motors

Oil & gas facilities

Mining operations

Power utility testing

Which One Should You Choose?

Choose Resistive Load Bank if your goal is to verify total power output capacity and ensure stable operation under load.

Choose Inductive Load Bank if your site includes motors, compressors, pumps, or transformers and you need to simulate real-world industrial load conditions.

In many professional generator testing scenarios, both types are used together as a Resistive + Reactive (R+R) Load Bank to achieve a realistic 0.8 power factor load test.