ECA Group's world-class VSD - variable speed drives range from 40 to 500A for AC motors controls, provides high efficiency greater than 92%. Designed for military applications, they are waterproof, compact, silent, up-gradable and robust. ECA Group's VSDs can drive synchronous and asynchronous AC motors and be configured through Ethernet from a PC. Scalar (U/f) and flux vector controls are featured along with cutting-edge motor and VSD protections.