At the request of a controlled load a corresponding lamp at the front starts flashing until the load is ordered to be connected and then it changes to steady light. The lamp remains lit and the control output activated until the request contact is opened.
Hometask: Ex. 10, 15, 17, 18.
The third class period
19 4
Listen to the text about operation of internal monitoring of power plant control system. Give it free translation.
A speciality of the system is the internal monitoring feature which indicates abnormal conditions such as interruption, earth fault or malfunction of certain connected devices.
An internal failure will be indicated by the lamp of the unit containing the detection circuits for that particular fault. Further indication is given by light emitting diodes, visible when the front plate is removed.
The basic unit and the additional monitoring unit each have one contact, opening at internal alarm state. Synchronizing/load sharing unit and relay unit are connected to the basic unit in order to affect this contact.
20 4
Fulfil the following:
1. Name the units of the power plant control system (7).
2. Name the maximum number of different electronic boards. Give the reasons of it.
3. Name the functions of the basic unit.
21 5
Record your answers on a tape.
1. What is meant by the “mother board”?
2. What is the marine application of the power plant control system?
3. What is the operation of the central unit?
Listen to the text, dwell on its subject with your fellow-student and then record your dialogue on a tape.
Control Systems. General Requirements
1. Automated machinery provided with automatic or remote control system, as well as, to the necessary extent, with monitoring systems, is in addition to be provided with means of local control.
In each case of failure in automatic or remote control systems, the possibility of local control is to be maintained.
2. Where machinery or installation is remotely controlled, it should be possible for the operator to check, with sufficient reliance, from his control station whether his command has been carried out by remote control system.
3. Each automatic or remote control system is to prevent the automatic restart of controlled machinery after its stopping by the safety or by emergency manual stop. Restart should be possible after manual reset.
4. Where machinery space of the ship is to be continuously fittended by one person, the extent of the necessary remote or automatic control will be specially in view of the location of the control station and manning routine of machinery, as well as their service requirements.
Translate these word-combinations:
a) the remaining wastes; b) the wastes remaining in the end; c) the isolated product; d) the articles published by. . . ; e) increase with increasing size of the atoms concerned; f) discover differing ratios; g) increased solids contents decreased; h) led to the modified and improved synthesis; i) a heated mixture gave approximately; j) increased inductive power affects the electron bonds; k) with decreased water content.
The fourth class period
26 4
Translate the following:
1. The results achieved are very important. 2. The methods improved by the workers brought good results. 3. The methods improved brought good results. 4. The data obtained are in a good conformity with the predicted results. 5. The technology developed by them is under consideration. 6. The well-equipped laboratory; the predicted results; the discovery mentioned received; the data obtained; increase with increasing-size of the atoms concerned; with decreased water content; increased solids contents decreased.
27 5
Listen to paragraphs 1—4, read sentence by sentence and translate them orallv in pauses.
28 4
Respond to the questions. Compare the results with the text.
1. What units does the power plant control system comprise of?
2. What are in your opinion the specific features in the design of the system?
3. What is meant by the “mother board”?
