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Arc Flash Protection

  • Schedule : Online
  • Who is this for: Electrical Engineering students, Professionals

Duration: 5-8 Hours
Schedule: Online
Level: Beginner
Rs: 64,000

Course Overview

  • To understand the basics of shock hazard
  • To understand the basicsb of arc flash hazard
  •  Reasons for arc flash events
  • To understand what really happens in an arc flash event
  • To understad Arc flash mechanism
  • It's impact on equipment
  • Organ damage due to pressure wave

 

  • Electrical Hazards with examples: electric shock, arc flash events, working at heights, working in confined spaces, fire and explosion, mechanical hazards

  • Common electrical equipment and hazards posed

  •  Arc Flash and its Effects

  • Reasons for arc flash events

  • What really happens in an arc flash event?

  • Insulation failure/violation of clearances

  • Arc flash mechanism

  • Impact on equipment

  • Hazards to personnel in the vicinity

  • Burns

  • Organ damage due to pressure wave

  • Hearing damage

  • Shrapnel effects

  • Fundamentals of Power Systems

  • Configurations

  • Equipment used

  • System earthing and its role

  • Protective earthing and its role

  • Faults and types of faults

  • Bolted faults and arc faults

  •  Calculation of Fault Currents

  • Fundamentals of short circuit calculations

  • Simplifying assumptions

  • Ohmic impedance and per unit impedance

  • Infinite bus

  • Base KVA of a system and its use in calculations

  • Network theorems commonly used

  • Equivalent diagrams

  • Fault calculation approach for a simple system

  • Earth faults and the importance of system earthing

  • Mitigation of fault levels in a system

  •  Protection in Power Systems

  • Fundamentals of power system protection

  • Protection attributes

  • Protective devices (fuses, built-in release and relays)

  • Time-current characteristics

  • Impact of bolted faults on tripping time

  • I2t: the important factor in deciding the hazards of faults

  • Commonly used protection approaches

  •  Arc Flash Studies – Codes and Standards

  • OSHA 29 C FR – part 1910

  • National Electrical Code N FPA 70E – standard for electrical safety in the workplac

  • IEEE Standard 158

  • Definitions used in arc flash study

  •  Arc Flash Study Detailed Procedure

  • Flash protection approach boundar

  • Detailed arc flash stud

  • Calculation of working distance and flash boundary as per IEEE Standard 1584

  •  Data Collection and System Modeling

  • Data for calculation of fault currents

  • Modes of operation

  • Lower short circuit conditions with long tripping times

  •  Determining Arc Flash Hazard Risk Category

  • Detailed examples and exercises simplified tables approach

  • Matrix table

  • Single line diagram approach

  • Short circuit study report coordination

  • Hazard risk category for metal-clad switchgear 1kv and above

  • NFPA 70E table 130

  •  Reducing Arc-Flash Hazard

  • Mitigation of energy by reduced short circuit current and faster protection

  • Overvoltage protection to reduce insulation failure risk

  • Reducing the risk of arc flash by better equipment design (clearances, creepage, insulation)

  • Providing arc vents to direct arc away from operator

  • Containing internal arc flash by switchgear that is arc resistance

  • Avoid local operations and live work

  • Better maintenance practices

  • Insulation status and PD monitoring

  • Contacts and joint status-monitoring through thermography

  •  Personal Protective Equipment Made of FR Clothing

  • The evolution of Flame Resistant (FR) fabrics

  • The various types of FR fabrics that are available in the marketplace

  • FR fabrics and the effects of undergarments

  • Limitations of FR fabrics

  • Test method ASTM F 1959

  • Garment construction standard ASTM F 1506-02a

  •  Project Work

Topics included are

  •  Covering the dangers of arc flash incidents to working personnel and their impact on equipment
  •  How to prevent arch flashes and safety in the event of one.