Year: 2019 Language: english Author: Dennis T. Hall BA (Hons), CEng MIEE, MIMaTE Genre: Textbook Publisher: Witherbys Edition: 4th ISBN: 9781856098571 Format: PDF Quality: eBook Pages count: 266 Description: This book's objective is to help marine and electrical engineers acquire the knowledge required by STCW for management and operational level endorsements and to become more familiar with various electrical applications that can be found on board ship.
Contents
power diagram, as shown in Figure 1.3, represents the main features of a system and its bounds. Its main use is to illustrate the ways of operating the system. Details are omitted to make the diagram as clear as possible. A circuit diagram, such as Figure 1.4, shows the detailed functioning of a circuit. Graphical symbols are arranged to show the operation as clearly as possible, without regard to their actual physical layout. The coil and its related contacts are identified by a number and letter code. Although there are international standards (IEC, EN, NEMA, etc) for the symbols that represent electrical components, you must be prepared to meet various different symbols representing the same component depending on the standard followed by the equipment's manufacturer. The use of a circuit diagram enables personnel to understand the circuit and to follow each sequence in the operation from the moment of turning on the power supply and initiating the operation (eg by pressing a start button) to the final act (eg starting of the motor). If the equipment fails, the engineer can follow the sequence until they come to the operation that has failed. The components involved in that faulty operation can then be examined to locate the suspect item. There is no need to examine other components that are known to function correctly and have no influence on the fault, so the work is simplified. A circuit diagram is an essential tool for fault finding.
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Practical Marine Electrical Knowledge
Year: 2019
Language: english
Author: Dennis T. Hall BA (Hons), CEng MIEE, MIMaTE
Genre: Textbook
Publisher: Witherbys
Edition: 4th
ISBN: 9781856098571
Format: PDF
Quality: eBook
Pages count: 266
Description: This book's objective is to help marine and electrical engineers acquire the knowledge required by STCW for management and operational level endorsements and to become more familiar with various electrical applications that can be found on board ship.
Contents
power diagram, as shown in Figure 1.3, represents the main features of a system and its bounds. Its mainuse is to illustrate the ways of operating the system. Details are omitted to make the diagram as clear as
possible.
A circuit diagram, such as Figure 1.4, shows the detailed functioning of a circuit. Graphical symbols are
arranged to show the operation as clearly as possible, without regard to their actual physical layout. The
coil and its related contacts are identified by a number and letter code. Although there are international
standards (IEC, EN, NEMA, etc) for the symbols that represent electrical components, you must be
prepared to meet various different symbols representing the same component depending on the standard
followed by the equipment's manufacturer.
The use of a circuit diagram enables personnel to understand the circuit and to follow each sequence in
the operation from the moment of turning on the power supply and initiating the operation (eg by pressing
a start button) to the final act (eg starting of the motor). If the equipment fails, the engineer can follow the
sequence until they come to the operation that has failed. The components involved in that faulty operation
can then be examined to locate the suspect item. There is no need to examine other components that are
known to function correctly and have no influence on the fault, so the work is simplified. A circuit diagram is
an essential tool for fault finding.
Contents
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