Distribution Switchgear Technology Training
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Distribution Switchgear Technology Training Course
Introduction:
This intensive training program, spanning five days, has been developed to provide participants with the latest advancements in Circuit Breakers and to address key aspects of maintenance for low, medium, and high voltage switchgear. It is important to note that there is a wide range of equipment utilized in switchgear across different voltage levels. Switchgears play a critical role in distributing and controlling electrical power in manufacturing plants, power plants, and utility distribution systems. Neglecting proper maintenance practices can result in inefficiencies in the power system and a decline in overall system reliability. In some older plants, switchgear from the 1940s may still be in use in certain areas, while modern switchgear has been installed in upgraded sections. This course will address maintenance challenges faced by both maintenance managers and technicians. For newer plants, the focus will be on the modern equipment available from limited manufacturers. The course will highlight the commonalities among these different systems and equipment.
Course Objectives:
By the end of the training, participants will be able to:
- Design, inspect, maintain, repair and troubleshoot circuit and switchgears
- Apply in-depth knowledge and skills on LV/MV/HV circuit breakers and switchgears
- Describe switchgear details such as ratings, degree of protection, service conditions and ancillary equipment
- Explain switchgear asset management including CBM and RCM process, tripping devices, maintenance and testing
- Apply load and fault calculation to decide the task of protection system and the operating conditions of power system
- Explain circuit breaker control circuits, types and application of protective relays, the structure of control circuits and the use and application of current and voltage transformers
- Discuss circuit breaker characteristics in relation to protection control circuits, selectivity, sensitivity and speed of the control circuits
- Recognize the value of the earthing system to protection control circuits and the power system protection as well as fault clearance and power redundancy through a control system application
- Identify the various switchgear diagnostic techniques and employ the different types of substation circuit breaker techniques and determine the switchgear vital equipments including batteries condition and monitoring, relay applications for basic complex busbar arrangement and zone selection logi
- Employ substation maintenance techniques and discuss their description, structures, features, and functions
- Apply the switchgear maintenance practices and improve maintenance and repair procedures
- Carry out maintenance work orders including their process development, procedures, and problems encountered
- Introduce computerized maintenance management systems (CMMS) and recognize its importance in circuit breaker design, inspection, maintenance, repair and troubleshooting
Who Should Attend?
This course is intended for all Engineers and other Technical Staff who need a sound understanding of Low, Medium, and High Voltage Switchgear and Circuit Breaker design, inspection, maintenance, repair, and troubleshooting.
Course Outlines:
GENERAL INTRODUCTION
- Electrical engineering basic concepts
- Three-phase review and per unit
- Voltage levels
- One line and three-line diagram
- Generation system layout
- Transmission system layout
- Substation system layout
- Distribution system layout
INDUSTRIAL SWITCHGEARS
- Fuses
- Auto-reclosers
- Automatic sectionalized
- Circuit Breakers
- Isolator switches
- Load switches
- Relays
- Current transformers
- Voltage transformers
CB DESIGN SPECIFICATION BASED ON SHORT CIRCUIT CURRENT LEVEL
- Per unit system
- Faults on power systems
- Transient phenomena in power system
- Symmetrical component analysis of three phase network
- Network connection for various fault types
- Current and voltage distribution in system due to a fault
- Effect of system on zero sequence quantities
- Computer programs based short circuit calculation
CB DESIGN SPECIFICATION BASED ON ARC PHENOMENA AND CIRCUIT INTERRUPTION
- Arc phenomena
- Maintenance of the Arc
- Properties of Arc
- Arc Interruption theory
- Circuit Breaker Rating
- Circuit constants and circuit conditions
- Conditions of severity
- Re striking voltage transient
- Class A ultrafast transients
- Class B system transients
- Class C low transients
- Transmission line transient
- Switching transients
- Duties of Switchgear
LV CIRCUIT BREAKERS
- Low voltage molded case current limiting circuit breakers
- Low voltage molded case circuit breakers with high breaking capacity
- Insulated case circuit breakers
- Low voltage air circuit breakers
- Low voltage circuit breakers specification
MODERN MV AND HV VACUUM CB
- Introduction
- Advantages of vacuum interruption
- Vacuum contactors and interrupters
- The vacuum medium
- The vacuum arc
- Vacuum arc stability
- Vacuum break down
- Vacuum switch construction
- Applications of vacuum circuit breakers