GWO CoHE Training Standard V0
Lead a discussion about the hazard of arc flash in a WTG environment.
Facilitate groups discussions with the participants about typical injuries arising from electrical shocks and arc flash and how to reduce the risk of typical injuries arising from electrical shocks and arc flash.
Note: Examples of how to reduce the risk of typical injuries arising from electrical shocks and arc flash are:
Do not re-energise circuits that have tripped without making sure that it is safe.
Secure metallic parts, so they do not fall into a circuit.
De-energise circuits below the working area (not only where you are going to be working).
Making live tests with a faulty meter.
Note: An example of how to facilitate group discussions about how to reduce the risk of typical injuries arising from electrical shocks and arc flash could look like this:
a. Assign the participants into groups (maximum of 4 participants per group).
b. Share a text-based scenario from Toolbox.org with the groups e.g:
i. A technician was replacing a 480 Volt electrical breaker.
ii. It had been isolated, removed and replaced with a higher rated breaker.
iii. The new breaker had been energised and voltage checked with an adequate measuring equipment.
iv. While attempting to check phase sequence, an arc flash occurred.
v. The technician was holding the instrument test leads to the terminals of the breaker at the time of the incident.
vi.
He suffered injuries and second-degree burns.
c. Ask the participants to discuss in their group:
i.
Why did this happen?
ii.
What could be learned from this?
iii.
What other actions could have been taken to prevent this?
d. Encourage the participants to ask themselves and their colleagues when working
i.
How can something like this happen here?
ii. How can we better plan the work so something like this doesn’t happen?
iii.
What precautions have we put in place to:
Reduce the likelihood of arc flash or other events
Reduce the severity and consequences of arc flash or other events?
The participants shall:
Global Wind Organisation
www.globalwindsafety.org
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