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, including circuit breakers, plays a critical role in electrical distribution systems, and its proper operation significantly impacts the overall system performance. This two-day workshop will address various aspects such as application, installation, maintenance, and testing of medium and high voltage switchgear and circuit breakers. Additionally, there will be coverage of low voltage switchgear.
The workshop will provide a comprehensive understanding of switchgear theory and standards. You will develop a solid grasp of the key considerations involved in the appropriate application, installation, and maintenance of these crucial equipment components, with a primary focus on safety.
This comprehensive five-day workshop primarily emphasizes medium voltage switchgear, which represents the majority of switchgear installations in electrical distribution systems. Air blast, oil, SF6, and vacuum circuit breakers will be the main focus. Practical principles will be illustrated through case studies featuring equipment from leading manufacturers. Furthermore, other components related to power system protection will be discussed to ensure a comprehensive understanding of switchgear within the correct context.
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