The voltage dip and interruptions generator is specially designed according to the characteristics and requirements of EMS measurement under a sudden reduction or interruption of the voltage at a point, CSS61000-11 CSS61000-11T used a big LCD in both English and Chinese operating interface. They have more fine performance such as high reliability, convenient operation, and full meet the standard requirements of IEC 61000-4-11, EN 61000-4-11 and GBT17626.11