Patent ID: 8400034

Claim:
A protective wall system enclosing a danger zone around an alternator comprising: a front wall disposed at a front end of the wall system; a back wall disposed at a back end of the wall system; a first side wall and a second side wall connecting the front wall and the back wall, wherein the first side wall and second side wall extend parallel to a longitudinal axis of the alternator, and wherein the front wall, the back wall and the first and second side walls are gas-tight; a gas-tight bottom; a first casing enclosing a rotor and a stator of the alternator, wherein a service area surrounds the first casing, and wherein a distance from the first casing to each one of the first and the second side walls is at least 1.50 meters; a gas guiding device configured to guide at least one of gas and heat from a bottom part of the alternator to an upper part of the alternator; a first cooling compartment flanking a front end of the first casing and a second cooling compartment flanking a back end of the first casing, the first and second cooling compartments being configured to receive hydrogen circulating in the first casing so as to cool the hydrogen; a front end axial bearing flange flanking the first cooling compartment and having a front wave guide seal; a back end axial bearing flange flanking the second cooling compartment and having a back wave guide seal; a second casing enclosing an exciter, wherein the front end axial bearing flange is connected to the exciter; and a ventilation device attached to the first casing, wherein the first casing includes at least one ventilation channel.