To control the speed of machinery in many industrial processes—such as assembly lines—it is necessary to operate at different speeds for different products. Sometimes, a system requires flow regulation for a pump or fan, and adjusting the drive speed may offer better energy savings compared to other flow control techniques. If the output speed changes continuously within a range without steps, the drive is typically referred to as a Variable Speed Drive (VSD).

VFD series V74 is designed with a compact, single-phase enclosure. It is commonly used in low-power applications such as HVAC systems, electric motors, food industry, chemical industry, medical and sanitary equipment, and transport machinery.