Air compressor motor burned Case Analysis - Compressor vacuum

Open-type refrigeration compressor has been forgotten, but the refrigeration industry and some field personnel retained habits of the past - with a compressor evacuated. This is very dangerous.

Air acts as an insulating medium. After vacuuming the sealed container, which discharge phenomenon between the electrodes is very likely to occur. Thus, with the deepening of the degree of vacuum within the compressor housing, between the terminal housing exposed insulating layer between the insulating medium or lose small damaged windings, once energized, the motor may be burned in a short circuit instantaneously. If the shell leakage, it may also cause an electric shock.

Thus, the ban compressor vacuum and compressor systems and vacuum state (vacuum extraction was not yet add refrigerant), prohibited to the compressor power.