1. What is the purpose of the automatic control equipment?
2. What are the advantages of the system?
3. What main functions of the automatic control system can you name?
29 2
Fill in the blanks with suitable words.
1. Selection of the ... of diesel alternators is a manual operation.
2. At ... a programmed number of sets will be started and the set which is first to reach frequency will be connected to the ... 3. A special unit in the automatic is available for ... of connection of large loads.
30 4
Using the notes below speak on operations which the automatic control equipment must carry out:
1. full, operation, equipment, carry out, starting, synchronizing, load, sharing, several, diesel alternator, power, demand, increase, disconnect, stop, event, excessive, available. 2. event, fault, set, alternator, automatically, start, connect, main, busbar. 3. black-out, program, number, set, start, first, reach, frequency, connect, busbar. 4. special, unit, available, program-blocking, connection, large, allow, equipment, ensure, always, sufficient, power, load.
31 4
Complete the following sentences according to the text. Compare the results with the text.
1. The only manual operations needed are... 2. The automatic control equipment is designed to meet the requirements made by classification societies on equipment in UER. This implies. . . 3. The automatic control equipment can be connected to the general alarm system on board, provided that. . . 4. A special unit in the automatic is available for programblocking of connection of large loads, thus allowing the automatic equipment to. . .
Give Russian equivalents for the following sentences. Pay attention to the underlined words.
1. We found new routes, the older ones being unsatisfactory. 2. For our purposes we may think of operation principle of the new device as being like one of all the rest. 3. This method is not the one to use. 4. The results were very favourable, especially that of mine. 5. The rates and molecular weights are affected by lowering the temperatures, the former being decreased and the latter increased. 6. Both floating and shore-based storage facilities are needed. The former serve operational needs, while the latter are for long-term storage.
35 3
Read the text, point out the Attributive groups and translate them. Ask each other questions covering the text.
Part III. Synchronizing
As soon as the lower frequency alarm limit has been passed, the synchronizing unit will be switched in and will sense the difference in phase relationship and frequency between the alternator and busbars. On the basis of these parameters, a control signal will be generated and will actuate the speed governor so that the generator will be rapidly brought into synchronism with the busbars. The voltage difference between the alternator and the busbars is detected by a breaker closing unit which will initiate closure of the circuit breaker as soon as the voltage difference tends towards zero at a sufficiently slow rate. If the difference in amplitude is excessively large, closure of the breaker is blocked.