Major appliances, often called appliances, include items such as refrigerators and washing machines, while small appliances encompass items such as toasters and. Main appliance · Small appliance · Consumer electronics · Refrigerator. Examples of Class III appliances include laptops, mobile phones, and energy-efficient light bulbs. Class III appliances use an isolating transformer.
The transformer has two separate coils called “primary winding”, which is connected to the power supply, and “secondary winding”, which is connected to the appliance. Each coil is wrapped around opposite sides of a common closed magnetic circuit called a “core”. The windings have their own circuits. They are known as primary and secondary circuits.
The windings don't touch each other; that's why their insulation gives the transformer its name. Since insulation is created by insulated coils that do not touch each other, in order to carry current, it is necessary for voltage to pass through the coils by induction. There are three types of small, portable or household appliances. Some appliances, such as toasters and coffee machines, heat up somewhat.
Other appliances, such as food processors and vacuum cleaners, move something. Some appliances, such as hair dryers, do both.
