Synchronization to the distribution network and closure of the circuit breaker
Unloading and shutting-down of the diesel-driven generators operating in parallel
In the event of an alarm on the shaft generator, changing over from this generator to the stand-by generators
Switching a diesel-driven generator onto the distribution network and unloading of the shaft generator when “Shaft generator off” is requested
Field suppression on the shaft generator after tripping.
23 4
Listen to paragraphs 1—4, read sentence by sentence and translate them orally in pauses.
24 5
Respond to the questions.
1. What functions does the shaft generator unit provide?
2. Will you try to explain in a few words the operation of the automatic control of the shaft generator?
3. What is meant by “Shaft generator ready”?
4. What is the difference between a tool and a drawing board?
25 2 Fill in the blanks with suitable words.
1. If the ... switch on the control panel is set to the “Shaft generator on” position the generator will be excited and will generate a voltage. 2. When a sufficient number of diesel-driven units are in service, the shaft generator will be unloaded and its circuit breaker will be ... 3. If no diesel-driven unit is synchronized to the network after an . . . time delay, the shaft generator breaker will trip and black-out will occur.
26 6
Using the notes below speak on generators running in synchronism: 1. diesel-driven, generator, supply, distribution, network, synchronize, shaft, unit. 2. generator, run, synchronism, breaker, receive, closure, equipmen-t. 3. synchronize, alarm, initiate, shaft, generator, knot, network, minute. 4. if, shaft, generator, alarm, become, operative, number, unit, necessary, replace, start, immediate, network.
27
о
Complete the following sentences according to the text.
1. In automatic electrical power plants using shaft generators additional shaft generator control unit is installed for. ... 2. The generator then rotates at the correct speed although without excitation, i. e. ... 3. The time delay for tripping the shaft generator circuit breaker can be set at... . 4. The black-out will last only about 1 s, since... . 5. When a sufficient number of diesel-driven units are in service, the shaft generator. . . .
Translate the following sentences. Mind degrees of comparison.
1. This device is small, but that one is smaller. 2. This is the largest engine room I have ever seen. 3. Segment AB is longer than segment CD. 4. This procedure is not so complex as that described above. 5. The new technique is twice as effective as the old one. 6. This substance reacts one third as fast as the other one. 7. Experiential data were presented in some detail and discussed as thoroughly as possible. 8. This evidence proved not so effective as we assumed them to be. 9. A compound is considered more stable, the smaller its potential energy.