entire wind power installation is controlled or monitored the means for reducing the salt content or for reducing the moisture content within the enclosing housing can be activated by way of the central station to prevent the outbreak of a fire in relation to parts of the power module it is also possible for an atmosphere with a low oxygen content to prevail within the entire enclosing housing during normal operation that can be effected for example by oxygen being removed from the air within the enclosing housing so that the oxygen content falls below the normal oxygen content of air it will be appreciated that it is also possible for a high co 2 content up to 100 or nitrogen content up to 100 or of another inert gas from a tank to be provided in the entire enclosing housing it is only when the operating personnel wish to enter the enclosing housing that then a normal atmosphere is restored within the enclosing housing so that it is possible to stay therein in such a case it is appropriate if the lock arrangement is to be opened only when an atmosphere which permits a person to stay within the enclosing housing without breathing equipment is produced within the enclosing housing the enclosing housing according to one embodiment of aspects of the invention can be disposed not only within the wind power installation but also mounted to the pylon directly on the outside thereof that can be effected for example by the entire enclosing housing being mounted on a platform externally on the pylon or.