Description: differential pressure measured between the inlet and outlet ports for the operating conditions; Name: diff pr rated
Description: Differential pressure for the operating conditions at the guarantee point ; Name: Rated differential pressure 
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