ABSTRACT
All machines in a dairy are equipped with individual electric drives; that is to perform work, one or more electric motors are integrated into a machine. One of the key objectives should be to use the lower electricity tariff during nighttime that is running the energy-intensive refrigeration compressors for cold storage during the night. Motors are very precisely defined in their performance (within narrow limits), unless their speed and performance can be varied by special options such as frequency control. Electrical motors in dairies must meet very high safety standards. Motors in production areas must be protected against foreign objects with a diameter > 8 mm, against contact with tools, and against water; therefore they are usually built in an encapsulated form. Electric energy requirements in a dairy can be very different for the various production sections and auxiliary units and are characterized by the manufacturing profile.
