Patent ID: 7748946

Claim:
A cooling system for a wind turbine, said cooling system used to cool at least one component in said wind turbine, said cooling system comprising: a filter system comprising at least one primary filter and at least one secondary filter, said filter system including a switch to select between said at least one primary filter and said at least one secondary filter; a cooling circuit comprised of at least one conduit and a coolant medium; a pressure sensing system to sense the pressure differential between an input of the filter system and an output of the filter system, wherein a signal can be sent to the filter system when the pressure differential exceeds a predetermined threshold value, thereby indicating that the at least one primary filter is experiencing reduced flow; and wherein said filter system switches from said at least one primary filter to said at least one secondary filter, the switch having a first configuration where the coolant medium is routed through the primary filter but not the secondary filter, and the switch having a second configuration where the coolant medium is routed through the secondary filter but not the primary filter.