17 6
Fulfil or explain the following:
1. Explain the function of synchronization to the distribution network and closure of the circuit breaker.
2. Name conditions which are indicated on the control panel.
3. Speak on the necessity of time delay in all alarms.
18 4
Record your answers on a tape.
1. What is the purpose of the additional shaft generator control unit?
2. What is meant by “shaft generator ready”?
3. How can the time delay for tripping the shaft generator circuit breaker be set?
4. How would you know that no diesel-driven unit is synchronized to the network after an adjustable time delay?
5. What do alarms indicate?
19 8
Dwell with your fellow-student on automatic control of the shaft generator. Use ex. 17, 18. Then record your talk on a tape.
20 15
Practice pronunciation. Open your books and repeat after the speaker in pauses paragraphs 1—4 of the recorded text “Automatic Control of the Shaft Generators”. Then close your books and do the same with paragraphs 5—6.
21 4
Listen to the recorded text and say what is the difference between a tool and a drawing board.
A Machine Tool
Madmen seem to keep up in step with the progress of science and technical development of the day since there is an ever increasing number of ballistic missiles, interplanetary rockets, atomic bombs and submarines of every kind there.
The other day when Doctor Nut junior had to sign in “an electric machine tool” his face did not show any surprise at all.
He assured the doctor he had just left the assembly line... Moreover, he had been provided with a rotary tool. . . He maintained his speed range was 20,000 rpm to 38,000...
Two days later Dr. Nut, accompanied by a group of students, entered the room where the “model” was treated.
— This is the tool! — said the doctor pointing to the fellow.
— No, I am not, — answered the madman with determination. — If I were really such a model I would be working now. But this does not seem to be the case because for the last two days I’ve been doing absolutely nothing! I must be something else more like a drawing board, but I’m not so sure about it yet...
22 5
Write the exact translation.
Automatic Control of the Shaft Generators
In automatic electrical power plants using shaft generator additional shaft generator control unit is installed for automatic change over of the power supply between the shaft generator and the diesel-driven generators.
The shaft generator unit provides the following functions:
Excitation of the shaft generator