A tree trimmer drops a limb on the power lines. Normally this would relay the line out. A problem with the relays causes the line to remain energized. It arcs for hours and sparks several fires.
A tree trimmer drops a limb on the power lines. Normally this would relay the line out. A problem with the relays causes the line to remain energized. It arcs for hours and sparks several fires.
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This is a prime example why Indianapolis Power and Light will not let any lineman within minimum approach distance without a live line restriction on the circuit. There is no doubt that "one shots" save lives. It did mine.
Before I issue and OK TO work hot with a hold in case of relay to any field crews I check my maps against their work location, Have the reclosing relays blocked at all terminals and tagged, I have Do Not Reclose tags applied to all CB control handles, I apply SCADA inhibits to prevent my from reclosing the circuit, and I update my mimic board to indicate work on the circuit.
that is a contract line crew pulling maintanance...it is a 35kV system with a 12 or 13kV underbuilt and the two circuits got together and relay had an issue with a breaker...we have watched this video in detail and discuss this same video in a lot of our safety meetings with our new hires....
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