Page 270 - Electrician - TT (Volume 2)

ELECTRICIAN - CITS

Normal operating temperature range of the appliance:

The normal working temperature of a toaster heating elementsvaries from 385°C to 900°C. The toasting zone
temperatureis about 260°C.
Rating of toasters:

The toasters are rated for 600 W, 750 W. 1000 W and 1250 W to work from 230 volts to 250 volts, 50Hertz supply.
Types of toasters: Toasters are available in two types.
1 Non-automatic toasters
2 Automatic toasters

In some toasters, the user must keep watching the bread whileit is being toasted so that he can turn off the heat
when thebread slice turns to the desired colour by trial and errormethod. This type of toaster is classified as a non-
automatic toaster because the timing and switching off of theheat is left completely up to the user. An automatic
toaster does all the necessary operations by itself.
1 Non-automatic toasters
Typically, the non-automatic toaster consists of a metal shell containing a bread rack and a series of heating
elements. The doors on either side are hinged at the bottom, and swing out from the top and downward to a
horizontal position

Fig shows the parts of a non-automatic toaster. Bread is placed on the doors, which are then closed, thus bringing
one side of each slice of the bread close to the heating element mounted in the centre of the toaster shell. When
one side is toasted, the door has to be opened manually.
The bread has to be turned manually for toasting the other side by following the same procedure. The non-
automatic toaster has neither switches nor thermostats. Non-automatic toasters have been replaced almost uni-
versally by the automatic type

2 Automatic toasters
Automatic toasters are built in two and four bread slice sizes. They are often referred to as ‘automatic pop-
up toasters’, and these toasters automatically perform the operation required fortoasting. Automatic toasters
Automatic toasters are built in two and four bread slice sizes. They are often referred to as ‘automatic pop-up
toasters’, and these toasters automatically perform the operation required fortoasting.

Basically automatic toasters are simple appliances with three working parts.

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CITS : Power - Electrician & Wireman - Lesson 101-103