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Operating plant under overhead lines


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Does anybody on here have to use plant under overhead lines? I'm aware of the need to to establish specific safe systems of work when in the vicinity of over head lines but most information is based around static jobs / sites. The work I'm involved in is mobile and to set up goal posts etc everytime we pass a machine beneath is just not practicable, a machine could pass under upto 10 in a shift as they can travel 4km in a day. I'm currently carrying out cable height surveys and have devised a basic but effective arm height indicator but this does not negate the risk of human error. To retro fit the machines with height restrictors is an option but the outlay would be immense.

 

Has anybody managed to implement an acceptable SSOW that is more suited to the mobile nature of watercourse management and doesn't involve all the bells and whistles?

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You could try something like coloured cones put slightly in the machines way so he has to slalom round them. One man then could follow the TM closure down setting them up either side at each cable, this would then be a physical reminder to the machine operator to check his bucket height. You would obviously need to make this clear to everyone at the start of work briefing.

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Electircal enginner myself, work for UKPN. When on HV sites it's 1.4 meters distance from plant but that's with a substation entry certificate. I would call UK Power Networks and check details, just to be safe.

 

Thats only 132kv though, 275 requires 2.1m and 400kv needs 3.1m. Thats what we work to anyway.

You also need to be aware of induced voltage when in proximity of hv and make sure the vehicle is suitably earthed.

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