Page 275 - CITS - Electronic Mechanic - TT - 2024

ELECTRONICS MECHANIC - CITS

Countertop Microwave Ovens:
The versatility and ease of installation of countertop microwaves make them a popular choice among many
households. They are available in various sizes and power capacities, accommodating different cooking needs
and kitchen spaces. From dorm rooms to family kitchens, there’s a countertop microwave for every setting.
Commercial Microwave Ovens:
Designed for the rigorous demands of professional kitchens, commercial microwaves are built to withstand heavy
use. They feature higher wattage for faster cooking times and larger capacities to handle bulk food items, essential
for restaurants, cafeterias, and catering businesses.
Compact Microwave Ovens:
Space-saving and convenient, compact microwaves are designed for places where kitchen space is at a premium.
Despite their small size, they are still powerful enough for basic tasks like reheating and defrosting, making them
perfect for small apartments, dormitories, or as an additional microwave in a busy kitchen.
Microwave oven block diagram
The block diagram of a microwave oven is given below .
The mains plug and socket are three-pin earthing type. The fast blow ceramic fuse is of 15 A, 250 V. Interlock
switches are linked with the oven door. Power will be applied to the mains transformer only when the oven door
is closed. At least one interlock switch is in series with the transformer primary, hence even a spot of dirt in the
relay or trial, cannot turn the oven on when the door is open.

In the wiring of a high-voltage unit for a microwave oven through which a high-voltage transformer, a magnetron, a
high-voltage capacitor, and a high-voltage diode are electrically connected with one another, the microwave oven
having a wire, leading to the magnetron from the high-voltage transformer, making a ...

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CITS : E & H - Electronics Mechanic - Lesson 160 - 179