Download Unit title: Marine Electrics Credit points: 10 Unit code: WEM002

Unit title:
Marine Electrics
Credit points:
10
Unit code:
WEM002
FHEQ level:
4
School:
Unit designation:
Traditional
Programme group:
Maritime Science and
Engineering
Engine
Unit delivery model:
CD
Max & Min Student
no.:
N/A
TOTAL STUDENT WORKLOAD
Students are required to attend and participate in all the formal scheduled sessions for the
unit. Students are also expected to manage their directed learning and independent study
in support of the unit.
PRE-REQUISITES AND CO-REQUISITES: None
UNIT DESCRIPTION
This unit is designed to satisfy the Maritime and Coastguard Agency requirements to enable
students to gain their Engineer Officer of the Watch Certificate of Competency. It covers
the basic principles of electricity and electro-magnetism and the performance of a range of
electrical components and devices used in the production and control of electricity in the
marine environment. This under-pinning knowledge is then used to understand the design,
operation and maintenance of alternating current machinery. This is complemented by an
examination of the behaviour of DC and AC single-phase networks, leading on to a study of
three-phase AC circuits and systems.
LEARNING OUTCOMES
On successful completion of the unit, students should be able to:
Knowledge and Understanding
K1
Identify and explain the concepts and principles used in the design and operation of
selected marine electrical machinery.
Cognitive Skills
C1
Solve numerical calculations on DC networks comprising of resistors in parallel
and series and AC networks comprising of resistive, inductive and capacitive
components.
C2
Explain the key operating principles of marine power generation and associated
supply and distribution systems.
Practical and Professional Skills
P1
Recognise the safe practices to be used when working on electrical equipment and
systems.
P2
Relate theory to practice for a range of selected marine electrical equipment and
systems.
Transferable and Key Skills
T1
Communicates ideas and data effectively.
T2
Solve numerical problems using a range of data.
AREAS OF STUDY
Electrical Principles
Ohm’s Law, Kirchhoff’s Laws, Faraday’s Law and Lenz’s Law, as applied to DC and AC
circuits. Electro-magnetic theory including the principles of self- and mutual-induction.
Electrical and electronic symbols, interpretation of circuit diagrams and conventions
according to British Standards.
Regulations and Codes of Practice
The current edition of BS8450 Regulations for ships; those parts of SOLAS relating to
electrical installations.
Machines, Equipment and Systems
Synchronous generators and motors, three-phase induction motors, transformers,
switchgear and protection devices, LV & HV distribution systems, including electrical
propulsion. Batteries and charging arrangements, emergency power supplies and lighting.
Electrical Safety
Safety in HV and LV environments; MCA Code of Safe Working Practice as applied to
electrical maintenance; safe isolation of electrical equipment, hazardous areas and
associated equipment, operation of testing & measuring equipment
DC Circuits
Calculations involving simple DC circuits with resistances in series & parallel, to include
power and energy.
AC Circuits
Calculations of resistance, inductance and capacitance in series and parallel, voltage &
current magnification factor; use of phasor diagrams to illustrate phase relationships.
Power calculations in three-phase circuits to include real power, reactive power and
apparent power; power factor and power factor correction methods.
Semiconductor Components and Systems
Operating principles and characteristics of: rectifying diodes, zener diodes, thyristors and
varistors.
LEARNING AND TEACHING STRATEGY
The core concepts of the unit will be delivered through a series of formal lectures. These
are designed to develop the basic theoretical and practical knowledge required to
understand the principles and analyse the operation of marine electrical circuits and to
establish the principles behind safe and efficient operation and maintenance of same.
In conjunction with formal lectures, students will be given directed self-learning, supported
by study material, to cover various elements or topic areas of the syllabus. Whenever
possible the theoretical problems or electrical systems being analysed will relate to a marine
engineering situation. Appropriate practical demonstrations will also be carried out, to
enhance the students’ learning experience and assist in developing the link between
theoretical principles and practical applications.
ASSESSMENT STRATEGY
To assist learning and provide students with timely and regular formative feedback, a peer
marked open book exam-type question will be attempted at the end of each major topic.
In addition, students will reflect on the element of self-learning for formative feedback.
The end test will cover the entire syllabus and allow students to confirm the achievement
of the learning outcomes.
ASSESSMENT
AE1
weighting:
assessment type:
length/duration:
online submission:
grade marking:
anonymous marking:
100%
end-of-unit examination
2 hours
No
No
Yes
AGGREGATION OF MARKS
N/A
RE-ASSESSMENT ARRANGEMENTS
Referral will consist of a resit examination.
Unit Authors: S. Towers, P. Jackson and D. Wittridge
Unit history:
Unit modified/Year Implemented/Code
April 2012
2012/13
WEM002