Design of Electric Switchboards (LV and MV) Only of Design and Engineering Engineers
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Design of Electric Switchboards (LV and MV) Only of Design and Engineering Engineers Course
Introduction:
Switchgear and circuit breakers play a crucial role in electrical distribution systems, and their proper operation is essential for the overall performance of the system. In this two-day workshop, participants will delve into the application, installation, maintenance, and testing aspects of medium and high voltage switchgear and circuit breakers. Additionally, there will be a discussion on low voltage switchgear.
The workshop will provide a comprehensive understanding of switchgear theory and standards, ensuring participants are well-versed in the subject matter. Emphasis will be placed on the proper application, installation, and maintenance of these critical equipment, with a strong emphasis on safety.
The workshop spans five days and primarily focuses on medium voltage switchgear, which constitutes a significant portion of switchgear installations in electrical distribution systems. It covers various types of circuit breakers, including air blast, oil, SF6, and vacuum circuit breakers. Practical principles will be illustrated through case studies featuring equipment from leading manufacturers. Additionally, other power system protection components will be discussed to provide participants with a holistic understanding of switchgear within the broader context of power systems.
By the end of the workshop, participants will have a thorough understanding of switchgear and circuit breakers. They will be equipped with the knowledge and skills necessary for proper application, installation, maintenance, and testing, with a strong emphasis on safety considerations.
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