Design of Modern Electrical Distribution Systems
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Design of Modern Electrical Distribution Systems Course
Introduction:
Switchgear, including circuit breakers, plays a vital role in electrical distribution systems, as their performance significantly impacts the overall system operation. This workshop will address various aspects related to the application, installation, maintenance, and testing of medium and high voltage switchgear and circuit breakers. Additionally, there will be coverage of low voltage switchgear. Participants will gain a comprehensive understanding of switchgear theory, standards, and the importance of proper application, installation, and maintenance, with a strong emphasis on safety.
Course Objectives:
Delegates will learn about the following:
- Selection of appropriate type and rating of circuit breakers and switchgear.
- Fundamentals of operation of switchgear.
- Switchgear components (CTs, VTs, relays, cable terminations)
- Safe operational policies including safety rules and safety documents.
- Able to discuss different LV for of separations.
- Fully understand how to size and select different type of motor starters.
- Diagnostic tools and test equipment for switchgears.
- Safe maintenance policies including safe working in switch rooms, indoor and outdoor substation
Who Should Attend?
This course is intended for engineers (Projects, Testing & commissioning, Design) and supervisors who have experience in this field.
Course Outlines:
- Introduction to LV & HV Switchgear.
- Breaking of AC currents
- Transient restrike recovery voltage (TRRV).
- Surge arresters.
- Metal clad & metal enclosed switchboards.
- LV forms of separation.
- Load flow studies (rated current).
- Calculation of fault currents (simplified methods, PU, MVA & Symmetrical components).
- Breaking & Making Capacities.
- Different types of LV Circuit breakers/contactors (ratings &tripping units/curves).
- Sizing of motor starters (DOL, Star/Delta, Auto transformer & soft starters).
- Fuse sizing for distribution transformers & motors.
- Type 1 & type 2 co-ordination for motor starters.
- Dimensioning of LV switchboards (MCC & power centers).
- Different types of HV Circuit breakers (Oil, Vacuum, Gas & Air type)
- Merits & demerits of each type of HV breakers.
- Different de-rating factors (temperature, altitude, etc …).
- Breaking capacity de-ratings according to IEC/ANSI C37.010.
- Bus bar sizing/cross sectional area/current density & skin effect.
- Specifications for switchboards.
- Overview of protection & measuring units.
- Different types electrical diagrams.
- Panel scheduling.
- Type & routine tests on switchgear.
- Course Evaluation & Summary