Objective:
Upon Completion of this course the participant will be able to: Understand Electrical Power Distribution Systems Equipments and Components Have knowledge of Sub Station Equipments, switchgears including transformers, isolators, circuit breakers etc. Understand substation and electrical power system equipments and components Have knowledge on low voltage (LV) switchgears Learn specifications, construction, installation, testing, commissioning of LV switchgears Learn proper maintenance and performance assessment of LV switchgears
Switchgear is a general term used for any devices that breaks and makes the electrical circuit and covers right from a typical piano switch used in household wiring to a highly complicated circuit breakers in substations. However they are broadly divided into two categories based on the application voltage into low voltage and high voltage. Low voltage switchgears consist of various components such as contactors, fuses, push buttons to name a few. An electrical engineer involved in selection, erection, commissioning and maintenance and repairs of these components can not underestimate importance of their thorough understanding. Hence a regular refresher course is needed to brush up the understanding.
Low Voltage switchgears are a component link between overall electrical power distribution and utilization and understanding the correct application needs to understand other related systems also. Hence a brief outline of overall system is also a part of the course. Thus an integrated course content consisting of basics of electrical engineering, understanding of various electrical equipments, Low Voltage Switchgears and then safety and statutory laws is very important.
This is an introductory course to understand the basic components of the electrical power system. The course is aimed at building knowledge related to Medium Voltage (MV) Switchgears and their design, specifications, construction, testing, installation, commissioning and maintenance.
Day 1: Electrical Power System
Basics of Electrical Engineering
Electrical Sub Station Electrical Network
Functions of a Substation
Industrial switchgears
Fuses, Auto-reclosers, Automatic sectionalizer
Circuit breakers, Isolator & Load switches
Relays, Current transformers and Voltage transformers
Day 2: Low Voltage Switchgears
Switchgear Locations, Housing Types, Classification Functions
Low Voltage Switchgears
Circuit Breaker Theory
Arc voltage, Restriking voltage Recovery voltage, Rate of rise of restriking voltage
Fault Clearing Process Sequence of fault clearing process
Duties of circuit breakers
Essential requirement of circuit breaker
Types of CB & Materials used in CB
Specifications of CB
Day 3: Switchgear Tests & Checks
Isolators & Types of isolators
Switchgear Panels Tests
Type tests Routine tests
Acceptance tests
Failure of circuit breakers
Preventive Measures for Avoiding CB Failures
Stringent quality checks during manufacturing
Condition monitoring checks during service
Breaker operation checks
Measurement/ testing of circuit breakers
Day 4: Inspection & Maintenance of Switchgears
Circuit breaker inspection, maintenance and services
Inspection
General inspection technical procedure
Daily inspection of circuit breakers
Monthly inspection of circuit breakers
Annual inspection of circuit breakers
Disassembly
Cleaning
Tightening
Lubrication
Day 5: Switchgear Up keeping & Troubleshooting
Operating duties
Potential problems with switchgear Modifications
Operational issues
Precautions for reducing the risk of switchgear
Fault clearance
Failure Modes
Condition-based maintenance
Frequency of maintenance
Diagnostic
Data not found.