Voltage is the electrical potential difference between two points in a circuit, measured in volts (V). It represents the force that drives electric current through a conductor. Key Aspects of Voltage: - Direct Voltage (DC): Maintains a constant level over time. - Alternating Voltage (AC): Periodically changes direction and magnitude. - High vs. Low Voltage: High voltage is used for power transmission, while low voltage powers household and industrial devices. Voltage is essential for electricity generation, transmission, and utilization in all electrical systems.

Variable-Speed Drive (VSD) is a device that controls the speed and torque of an electric motor by adjusting the input voltage and frequency. It improves energy efficiency, process control, and equipment lifespan in industrial and commercial applications.