Overall, these frequency converters then cover the current power range (1.4..55 kVA) of the SD2S series or even extend it upwards and downwards (0.8..66 kVA).

The first SD4S device variant initially served to close the power-side gap in the existing product portfolio of frequency converters in the lower power range: It started with a control cabinet variant of the SD4S with 800 W / 1.6 kVA. At the end of the second quarter of 2021, the next size with 1,600 W / 3.2 kVA was available. These SD4S variants represent a basis for the operation of high-speed spindles or motors in the power range from a few hundred watts to 1.6 kW. The devices are already in use by customers.