As NETA Certified Technicians, many of the tests and inspections performed may expose workers to electrical hazards. ANSI/NETA MTS, Standard for Maintenance Testing Specifications for Electrical Power Equipment & Systems specifies that individuals performing these tests shall be qualified and capable of conducting the tests in a safe manner and with complete knowledge of the hazards involved.
One of these hazards is arc flash. This quiz will look at some arc-flash reduction techniques. First, let’s start with identifying the arc-flash hazard.
- Which two factors are used to assess risk when performing a risk assessment?
a. Awareness, self-discipline
b. Job safety planning, job briefing
c. Likelihood, severity
d. Policies, procedures
- If an arc-flash hazard is identified during a risk assessment, which option is the first choice to mitigate the risk associated with the hazard?
c. Engineering controls
d. Administrative controls
Now let’s move on to some arc-flash reduction techniques.
- Arc-flash incident energy calculations are dependent on which factor?
a. Frame size of the circuit breaker
b. Protective device clearing time
c. Age of the switchgear
d. Limited approach boundary
- Which method can be utilized as an arc-reduction technique to lower the fault clearing time?
a. Remote racking
b. Energy-reducing maintenance switch
c. Arc-resistant switchgear
d. Remote operation
- Which type of protective relay typically utilizes light sensors?
a. Overcurrent relay
b. Undervoltage relay
c. Lockout relay
d. Arc-flash detection relay
- What are some additional methods that can be used as arc-flash reduction techniques?
a. Finger-safe components
b. IR scanning windows
c. Permanently mounted absence of voltage tester
d. All of the above
Virginia Balitski, CET, Manager – Training and Development, has worked for Magna IV Engineering since 2006. Virginia started her career as a Field Service Technologist and achieved NETA Level 4 Senior Technician certification. She has since dedicated her time to the advancement of training and safety in the electrical industry. She is a Certified Engineering Technologist through ASET – The Association of Science & Engineering Technology Professionals of Alberta. Virginia is current Vice-Chair of CSA Z462, Workplace Electrical Safety, is a member of the NFPA 70E, Electrical Safety in the Workplace Technical Committee, and serves on the NETA Board of Directors.