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Two-day Short Course on Design and Assessment of Electrical System in Buildings (8th Run) Conducted By Teo Cheng Yu B.Sc, M.Sc, DIC, P.Eng, C.Eng, FIES, FIEM, FIEE
Objective This short course is aimed to introduce participants to the principles and design considerations in carrying out the design of electrical system in buildings. Through lecture and the demonstration of dedicated PC-based programs, the participants can have a better understanding of the rational of various design criteria and procedures. Thus, they can learn how to obtain a comprehensive and sound design which meets the specified criteria. Every installation, either as a whole building or parts of it, shall comply with the safety regulations such as CP5 or the IEE Wiring Regulations. Through this short course, each participant will be guided to seven types of critical tests on normal loading, overloading, short circuit and earth fault conditions. Each circuit in each DB will be simulated and assessed accordingly. Design failure if any will be highlighted. These simulation tests provide a mean to assess whether the electrical installation meets the specified criteria and to ensure that safety requirements and CP5 are met. Course Outline1. Design Current and Design Procedure (3 hours) Design current, maximum demand and total connected load. Lighting circuit, socket outlet circuit, motor circuit and general circuit. Active load, reactive load and average power factor for final DB and main switchboard. Diversity. Load balancing. Typical step by step design procedure.
2. Protective Device and Phase Conductor (2 hours) Technical specifications of MCB, MCCB and ACB. Cable current rating and sizing of conductors. Voltage drop tolerance. Voltage drop constant and voltage drop calculation. Required conditions for overload protection. Small overload and cable utilization.
3. Normal and Overloading Assessment (3 hours) Design assumptions, breaker and cable loading tests. Design current deviation, cable operating under overload conditions and the requirement for protection against overload conditions. Voltage drop in each circuit in a DB and overall voltage drop up to each final circuit. Motor starting current and transient voltage drop during motor starting.
4. Fault Current Calculation and Short Circuit Protection (3 hours) Calculation of three-phase fault current at main switchboard, MDB, FDB and at final circuit. Calculation of cable impedance from voltage drop constant. Breaking capacity, Breaker operating curve and the maximum time for the cable to withstand the fault current. Short-circuit protection test. Overcurrent tripping discrimination.
5. Earthing System and Earth Fault Protection (3 hours) Transmission and distribution system earthing. Earthing in low voltage system. TT, TN-S systems and un-earthed system. Calculation of earth fault current in TT and TN-S system. Sizing of circuit protective conductors. Earth-fault and CPC test. Touch voltage and requirements for electric shock protection. Technical specifications of RCCB. Settings of ELR, earth-fault relays and IDMT relays. Electric shock protection test. Earth fault tripping discrimination.
6. Design of a Benchmark Network (2 hours) Adequate and unique design for a benchmark network. Load and design specifications Design of final DB, riser and main switchboard. Summary of technical assessment. Costing and bill of materials.
Who Should Attend All practising engineers and technicians engaged in the design and installation of electrical system in the power industries. These include designers of electrical installation, M & E engineers, consulting engineers, electrical contractors, facilities engineers and managers in charge of the electrical installations and building services. PE Board Accreditation This short course is accredited by Singapore Professional Engineers Board and each participant on completion of the course should be given 16 PDU units. Course Lecturer
C Y Teo received the B.Sc. (Eng.) in Electrical Eng. from National Taiwan University in 1971 and the M.Sc. in electrical machines and power systems from the University of London in 1974. He has worked in many areas of computer applications in power systems since he joined the Imperial College, University of London as a research assistant in 1973. Subsequently he was appointed engineer, executive engineer, senior engineer and project manager in the Public Utilities Board, Singapore from 1974 to 1981. With the Nanyang Technological University for 24 years from Senior Lecturer to Assoc Professor, he was appointed Head of Division of Electrical Engineering for 6 years. He was elected as the Chairman of the IEE Singapore Centre from 1993 to 1995 and is Fellow of the IEE, UK(1991), Fellow of IES(1994), Fellow of IEM(1994) and PUB/EMA licensed engineer (HT) since 1981. He was appointed as Technical Working Group member of Energy Market Company, EMC from 2003 to 2006 and member of the PE Board Examination Committee from 2004 to 2010. He is the author of three books in Pascal programming and the popular book on Low Voltage Systems. He is also the developer of a number of PC-based integrated simulators for power system planning, operation and analysis, and for the design and assessment of electrical system in buildings. He is currently the Director of Byte Power handling operational planning and simulation of a number of large HT networks including embedded generators. Course Registration Registration fee includes lecture, computer demo, lunches, refreshment and a copy of book written by the course lecturer. Certificate will be issued to participants who have completed the whole course. Registration should be accompanied by payment in full and is on a first come, first served basic. Please make cheque payable to Byte Power Publications and send together the details of the name of participant, name of organization, contact number, course title and address to Byte Power Publications 10H Braddell Hill, #23-30, Singapore 579727 Tel (65) 6256 0101 E-mail: cyteo@ntu.edu.sg
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