Description: volume flow at best efficiency point; Name: Optimum flow rate
Description: Rate of flow at the point of best efficiency; Name: Optimum rate of flow
Description: voltage which, together with the rated operating current, determines the use of the device and to which the various tests and the use categories refer. With single pole devices the rated rated operating voltage is generally the voltage over the pole. With multi-pole devices it is generally given as chained voltage; Name: Operating voltage