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LV, HV & MV Circuit Breakers Inspection, Testing & Maintenance

LV, HV & MV Circuit Breakers Inspection, Testing & Maintenance
Summary
Switchgear, like many other types of industrial equipment, is often unnoticed and neglected until it fails to function normally. It must be understood that there is an incredible variety of equipment used on low, medium and high voltage switchgear today. Switchgears play an important role in the distribution and control of electrical power in manufacturing or power plant and in a utility distribution system. Negligent maintenance practices can lead to power system inefficiency and loss of system reliability

To overcome this lack of vital insight & knowledge for equipment that is so important to our network, a 05 day workshop is design specifically for this purpose. This workshop will highlight all the challenges and issues encountered when it comes to the maintenance of HV and MV Switchgear.

This workshop is designed to update participants with the latest development of Circuit Breakers and to present some of the more common and updated aspects of medium and high voltage switchgear maintenance.

Reference
Not Available
Objective

At the end of the course, participants will be able to :  

  • List the voltage convention classifications used in this course.
  • Describe switchgear construction.
  • Describe a ground fault relay system.
  • Describe the three basic types of low and medium voltage circuit breaker contacts.
  • Describe the molded case circuit breaker.
Who should attend

This course is design for the following personal : 

  • Plant Electricians
  • Electrical Maintenance Personnel
  • Electrical Contractors
  • Heads of Plant Engineering
  • Heads of Technical Services
  • Senior Technicians
  • Senior Engineers
  • Engineering Technologists
  • Senior Technical Supervisor
  • Senior Electricians
  • Project Managers
  • Chief Electricians
  • Operation Managers
  • Heads of Departments - Electrical
  • Maintenance Managers

Additional Information
N/A
LV, HV & MV Circuit Breakers Inspection, Testing & Maintenance
  • 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
  • Fuses
  • Auto-reclosers
  • Automatic sectionalizer
  • Circuit Breakers
  • Isolator switches
  • Load switches
  • Relays
  • Current transformers
  • Voltage transformers
  • 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
  • Arc phenomena
  • Maintenance of the Arc
  • Properties of Arc
  • Arc Interruption theory
  • Circuit Breaker Rating
  • Circuit constants and circuit conditions
  • Conditions of severity
  • Restriking voltage transient
  • Class A ultra fast transients
  • Class B system transients
  • Class C low transients
  • Transmission line transient
  • Switching transients
  • Duties of Switchgear
  • 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
  • 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
  • Basic Features of SF6 Breakers
  • Dielectric properties of SF6
  • Quenching properties of SF6
  • Construction of SF6 breaker
  • SF6 CB types
  • Puffer type SF6 breakers
  • Double Pressure System
  • Single Pressure Puffer-Piston System
  • Single Pressure Self Blast System
  • Improvement in SF6 Breakers for HV Day Four
  • a. Air Circuit Breakers
  • b. Method of increasing arc resistance
  • c. Plan break type
  • d. Magnetic blow out type
  • e. Arc splitter type
  • f. Application
  • g. Construction and operation
  • h. Axial air CB
  • i. Blast air CB
  • Oil Circuit Breakers
  • a. Arc rupture under oil
  • b. Advantages of oil
  • c. Disadvantages of oil
  • d. Plan break oil circuit breakers
  • e. Arc control circuit oil breakers
  • f. Minimum oil circuit breakers
  • g. Construction and operation
  • DC Circuit Breakers
  • a. Construction
  • b. Methods of interruption
  • c. Application
  • Inspection
  • General inspection technical procedure
  • Daily inspection of circuit breakers
  • Monthly inspection of circuit breakers
  • Annual inspection of circuit breakers
  • Disassembly
  • Cleaning
  • Tightening
  • Lubrication
  • Equipments used in testing
  • Testing procedure
  • Direct testing
  • Contact resistance test
  • Insulation resistance test
  • Test report
  • Indirect testing
  • Switchgears control devices and wiring
  • Switchgears protection devices and wiring
  • Testing Classification
  • Testing laboratories
  • Description of a simple testing station
  • Low insulation Resistance (below 2000 Mega-ohms) between
  • a. Phase terminal and earthed frame, with breaker closed
  • b. Phase terminals of a pole
  • Resistance between Terminals of Pole too high (above 100 microhms) (15 micro-ohm per joint) contact
  • Unequal contact Wipe and Travel in 3-pole Measured from top surface of interrupter flange and the contact lip by a simple rod with
  • a. breaker open
  • b. breaker closed
  • One of the pole docs not close
  • Breaker operation too Slow During opening timing from trip command to contact separation instant too large (60 ms instead of say 40 ms)
BK Instructor
BK Instructor
 Instructor
  • BK Management Team believe that learning is not only about acquiring technical skills, it is also about learning behaviors & Competencies that are desirable for work in plant operation & maintenance critical dimensions. Our holistic teaching develops our delegates' personal effectiveness to function both as an individual and as a team player. The course delivery & modes of instruction will incorporate theory , practical skills and Q&A sessions. 
  • To enhance learning outcomes, theory sessions will comprise classroom based lecture that will intersperse with interactive discussions, scenario-based, case-study, group exercises, video clips, power point slides, learners' Guide and the application of various tools which will be provided to help in the delegates and participants of the learning’s objectives. With successful implementation of the learnt skills they are bound to enhance Individual & Organizational growth.
  • For online / Interactive Virtual sessions, Delegate should have a stable & good Internet connection on his Laptop.

On successful completion of this training course, BK’s Certificate with eligible Continuing Professional Education credits (CPE), will be awarded to the delegates , one CPE credit is granted per 50 minutes of attendance.

Course Features

  • Core : Training
  • Category : Maintenance & Reliability Engineering
  • Days : 5
  • Duaration : 40 Hours

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