Vocabulary.

Load list – перечень нагрузок

To compile - собирать документы, материалы; составлять

at anchor – на якоре

by multiplying - умножая

power consumption – потребление энергии

By comparing – сравнивая

under different circumstances – при различных обстоятельствах

an assumed value – заданное (допускаемое) значение

subtransient data – данные сверхпереходности

decrement – понижение, уменьшение

6. Translate the sentences.

1. What are the principle design documents for the ships auxiliary services?

2. What do they include? 3. When are all electrical services on the vessel identified?

4. What are these electrical services?

5. What is the purpose of the load list?

6. What does the term “typical operation conditions” mean?

7. How can you calculate the expected power demand?

8. What is the demand factor and how is it determined?

9. What do the service full load current and power factor depend on?

10. How can the expected generator kilowatts, kilovoltamps and power factor be computed?

11. How can you assess the number and rating of the main generators?

12. When can preliminary short-circuit current calculations be completed?

13. What is the principle purpose of the short-circuit current calculations?

14. What are the major contributors to short-circuit current?

15. What is the most simple short-circuit current analysis based on?

16. When is the “second stage” short-circuit current analysis completed? What does it include?

17. When is the “third stage” short-circuit current analysis completed? What does it include?

7. Complete the word combinations. Translate them into Russian.

Design Load Short-circuit current Electrical Lighting Electronic Power Operating Service Diversity Data Sub-transient System

Loads Demand Banks Document Reactance List Conditions Parameters Power Aids Factor Analysis Services

8. Insert the missing words:

Load information, short-circuit current, the demand factor, the short-circuit rating, with the client, sub-transient reactance, aids, the services' kilowatt, the load analysis, lighting loads.

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1. All electrical services on the vessel are identified _____.

2. _____ are estimated from the ship's general arrangements.

3. Electronic _____ are obtained from similar vessels.

4. _____ is determined by an experienced assessment of the estimated power during a four to six hour period when loads may be at their maximum utilization.

5. _____ is obtained from the load list.

6. The information about full load current and power factor is used to compute _____ and kilovar demand from which is computed the kilovoltamps.

7. When the load analysis and number and rating of generators have been determined, preliminary _____ calculations can be completed.

8. The principle purpose of the short-circuit current calculation is to ascertain _____ of the systems protective devices.

9. The most simple short-circuit current analysis is based on an assumed value of the generator's _____.

10. An approximate estimate of the worst case motor loading can be obtained from _____.