(a) The prime mover of a generator set must have: (1) All accessories necessary for operation and protection of the prime mover; and (2) A self-contained cooling system of a size that ensures continuous operation with 100 degrees F (37 degrees C) air.
Temperature derating refers to the ability in modern wind turbines to limit the power output to avoid overheating in the nacelle. The actual derating will depend on internal temperatures and pressures inside the gear, generator, transformer etc.
Yes, solar inverters do get hot, especially under prolonged exposure to direct sunlight or when operating at high capacity. This energy conversion process naturally produces heat.
The actual measurement at this location is representative of the axial distance from the eccentricity sensor pickup to the bearing centerline, compared to the bearing centerline to the turbine axial centerline.
Presence of water in hydrogen has to be avoided, as it causes deterioration of hydrogen's cooling properties, corrosion of the generator parts, and arcing in the high voltage windings, and reduces the lifetime of the generator.