68
close another circuit:
The electrical component involved the supply and
installation of new numerical protection relay which replaced the old static and
electro mechanical relays.
toggle – n, [C] an electric switch operated by means of a projecting lever
that is moved up and down:
A toggle switch located near the lights makes it
easy to reach.
withstand – v, [T] to be strong enough not to be hurt or damaged by
extreme conditions, the use of force, etc.:
The materials used have to be able to
withstand high temperatures.
Discuss the following topic words that will help you through the topic.
You will meet them in texts and exercises. Be prepared to use them
to reset
to exceed
to inset
to cut off
unlike
to withstand
voltage stress
rocker switch
a blown fuse
under fault condition
ground fault
power surge
Write a word that is similar in meaning to the underlined part
1. A circuit breaker is an electromagnetic device that opens the circuit
automatically.
2. The choice of a proper circuit breaker depends on the particular
application.
3. It may be a small device used for protecting individual household
appliance.
4. There are many types of switches available
f
or electric circuits.
5. All switches perform the same basic function of opening or closing
circuits.
6. The heat generated by the element is absorbed by the filler and passed
through the fuse body to the surrounding air.
7. The element provides the current path through the fuse.
8. Fuses have an inverse time current characteristic: that is, the greater the
overcurrent, the less time required for the fuse to open the circuit.
TEXT A. CIRCUIT BREAKERS AND SWITCHES
Ask yourself what questions you have about protective devices. Make
a list of the questions
