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3. Form the words according to the model and translate them.

Model: charge  overcharge  перегрузка

connect  disconnect  разъединять

pressure

 _________________________

 _________________________

heat

 _________________________

 _________________________

stress

 _________________________

 _________________________

current

 _________________________

 _________________________

load

 _________________________

 _________________________

organize

 _________________________

 _________________________

place

 _________________________

 _________________________

stress

 _________________________

 _________________________

4. Form the nouns from the given verbs according to the model. Translate them.

Model: to protect  protection  защита

to utilize

 ________________________

_________________________

to install

 ________________________

_________________________

to reduce

 ________________________

 ________________________

current

 ________________________

 ________________________

to connect

 ________________________

_________________________

5. Distribute the words below into the three columns:

action

process

doer

utilizer, utilize, installation, displace, overheater, displacement, overproduction, starter, equip, protection, disorganize

6. Translate into Russian. Mind both … and, in case, up to:

1. Both solid and gaseous insulators are highly in use.

2. In case a fuse gets faulty it should be replaced by a new one.

3. Capacitors of very high capacity  up to 1000 and more mF  are utilized in modem installations.

Fuses

Fuses are widely used nowadays as protection devices. They are utilized in various circuits, electrical equipment and installations. Fuses serve to protect them against overcurrents and short-circuits.

There are different types of fuses in use nowadays. Of them, quartz-sand fuses serve for voltages up to 500 volts; fuses of this kind are produced with current ratings of 15 to 60 amp and of 100 to 350 amp.

Fuses are commonly used in low-voltage industrial installations rated up to 1,000 V.

Fuse protection is based on a very simple principle: in case of a short-circuit or overcurrent, when the maximum value of current has been exceeded, the fusible link of a fuse is heated to its melting point. This opens the circuit and disconnects the circuit from the power source. In case of a fault, one should replace the faulty fusible element by a new one.

Fuses are used both in direct current (d.c.) and alternating current (a.c.) circuits.

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