Red Seal Industrial Electrician Exam 2025 – 400 Free Practice Questions to Pass the Exam

Question: 1 / 400

What is the function of a Variable Frequency Drive (VFD)?

It measures electrical loads

It controls voltage output

It adjusts the speed and torque of electric motors

A Variable Frequency Drive (VFD) is primarily designed to adjust the speed and torque of electric motors. By varying the frequency and voltage supplied to the motor, a VFD enables precise control over the performance of the motor. This functionality is crucial in applications such as conveyor systems, fans, and pumps, where the load requirements can change frequently.

Controlling the speed of the motor not only enhances operational efficiency but also helps in energy conservation, as reducing speed can minimize power consumption significantly. Additionally, by adjusting torque, the VFD can prevent mechanical strain on the motor and connected equipment, contributing to a longer lifespan and reduced maintenance needs.

This ability to tailor motor performance to specific operational demands distinguishes the VFD as an essential component for modern automation and control systems in various industrial environments.

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It provides emergency power supply

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