ELPT 2347 Electrical Testing and Maintenance

Transcription

1 SYLLABUS ELPT 2347 Electrical Testing and Maintenance INDUSTRIAL AND COMMERCIAL ELECTRICITY BRAZOSPORT COLLEGE LAKE JACKSON TEXAS PREPARED BY: DATE: August 28, 2013 INSTRUCTOR RECOMMENDED BY: RECOMMENDED BY: DATE: DIVISION CHAIRMAN DATE: DEAN The Brazosport College District shall not discriminate against, or exclude from participation in any benefits or activities either on the staff or in the student body, any person on the grounds of sex, race, color, religion, national origin, age, or handicap. 1

2 Brazosport College 500 College Dr. Lake Jackson, Texas ELPT 2347 Electrical Testing and Maintenance COURSE DESCRIPTION: Proper and safe use of electrical power equipment test devices and the interpretation of test results. Includes protective relay testing and calibration, direct current (DC) testing, insulation power factor testing, and medium voltage switchgear. (3 SCH, 2 lecture, 2 lab) COURSE LEARNING OBJECTIVES: Test over-current circuit breakers and relays using high current test sets and relay test sets; test motors and cables using the "Megger and DC Hypot;" list and explain three components of current in DC testing; measure "ground resistance" using the earth resistance test set; and identify and explain components of large industrial-type switchgear. TEXT AND REFERENCES NCCER Contren Learning Series, Electrical Level 2 & 4 Trainee Guide, Paperback, 7/E, 2011 NEC Revision, ISBN: 13: National Electric Code, 2011 published by National Fire Protection Association. Modules: Circuit Breakers and Fuses Grounding & Bonding Motor Operation and Maintenance 2

3 ACADEMIC HONESTY Brazosport College assumes that students eligible to perform on the college level are familiar with the ordinary rules governing proper conduct including academic honesty. The principle of academic honesty is that all work presented by you is yours alone. Academic dishonesty including, but not limited to, cheating, plagiarism, and collusion shall be treated appropriately. Please refer to the Brazosport College Student Guide for more information. This is available online at Click on the CATALOGS AND SCHEDULES link under STUDENTS. Academic dishonesty violates both the policies of this course and the Student Code of Conduct. In this class, any occurrence of academic dishonesty will be referred to the Dean of Student Services for prompt adjudication, and will, at a minimum, result in 0 for that assignment in this course. Sanctions may be imposed beyond your grade in this course by the Dean of Student Services. 3

4 COURSE GOALS The following list of course goals will be addressed in the course. These goals are directly related to the performance objectives (Addendum A). (* designates a CRUCIAL goal) 1. Explain the purpose of grounding and bonding and the scope of NEC Article Distinguish between a short circuit and a ground fault. 3. Define the National Electrical Code requirements related to bonding and grounding. 4. Distinguish between grounded systems and equipment grounding. 5. Use NEC Table to size the grounding electrode conductor for various AC systems. 6. Explain the function of the grounding electrode system and determine the grounding electrodes to be used. 7. Define electrodes and explain the resistance requirements for electrodes using NEC Section Use NEC Table to size the equipment grounding conductor for raceways and equipment. 9. Explain the function of the main and system bonding jumpers in the grounding system and size the main and system bonding jumpers for various applications. 10. Size the main bonding jumper for a service utilizing multiple service disconnecting means. 11. Explain the importance of bonding equipment in clearing ground faults in a system. 12. Explain the purposes of the grounded conductor (neutral) in the operation of overcurrent devices. 13. Explain the necessity of overcurrent protection devices in electrical circuits. 14. Define the operation of a circuit breaker. 15. Describe the operation of a circuit breaker. 16. Apply the National Electrical Code (NEC) requirements for overcurrent devices. 17. Describe the operation of single-element and time delay fuses. 18. Recognize the factors related to motor reliability and life span. 19. Measure motor winding insulation resistance and compensate for temperature. 20. Identify motors needing replacement. 4

5 STUDENT CONTRIBUTIONS Each student will spend at least 2 hours per week preparing for class. Attendance is critical in this class. A student missing 2 classes is subject to withdrawal by the instructor. The student will be given an opportunity to evaluate the instructor/course. COURSE EVALUATION Student grades will be assigned according to the following criteria: LABS 20% UNIT EXAMS 60% FINAL EXAM 20% Grades of A through F will be assigned according to the chart below: = A = B = C = D 59-0 = F COURSE SCHEDULE The class meets for 2 lecture hours and 2 lab hours per week. SCANS Competencies: The Secretary's Commission on Achieving Necessary Skills (SCANS) identified competencies in the area of Resources, Interpersonal, Information, Systems, and Technology; and foundation skills in the area of Basic Skills, Thinking Skills, and Personal Qualities. This course is part of a program in which each of these competencies and skills in this course, see Addendum A. 5

6 ADDENDUM A PERFORMANCE OBJECTIVES 1. Using the proper fittings, connect one end of a No. 4 AWG bare copper grounding wire to a length of ¾ galvanized water pipe and the other end to the correct terminal in a main panelboard. 2. Install two lengths of Type NM cable in a switch box using Type NM cable clamps. 3. Size the minimum required grounding electrode conductor for a 200A service fed by 3/0 copper. 4. Size the minimum required equipment grounding conductor in each conduit for a 400A feeder gap using two parallel runs of 3/0 copper. 5. Size the minimum required bonding jumper for a copper water pipe near a separately derived system (transformer) where the secondary conductors are 500 kcmil copper. 6. Identify the following on one or more circuit breaker(s) and fuses(s): number of poles; Load rating; Voltage rating; Amperage interrupting rating. 6