third rail in depots

[SpacePhoenix]

Shed based isolations that are designed to be switched on and off regularly will have some kind of control on the individual road which won't need contact with the the ECRO.

Will that be a switch/breaker with a cover over it that can be padlocked shut?

 

[dgl]

Will that be a switch/breaker with a cover over it that can be padlocked shut?

If it's anything like the video on youtube for shed protection that deals with a shed with 25kv electrification and there are lock off boxes covering the isolation switch designed to be used with multiple padlocks.

 

[Bigfoot]

Will that be a switch/breaker with a cover over it that can be padlocked shut?

Having worked only in sheds with overhead trolley supplies (shore supply) I can't comment on railed sheds, though they are rare I believe especially when it comes to maintenence sheds.

But yes shore supplies can be individually locked off. Though not so much cover over a breaker more just a key switch on the shore supply.

 

[SpacePhoenix]

Having worked only in sheds with overhead trolley supplies (shore supply) I can't comment on railed sheds, though they are rare I believe especially when it comes to maintenence sheds.

But yes shore supplies can be individually locked off. Though not so much cover over a breaker more just a key switch on the shore supply.

I was thinking it might have been done with a lockable cover over a breaker to allow multiple people to work on different aspects of a unit so that the 3rd rail can't be powered up again whilst someone is too close to it working on some aspect of a unit

 

[najaB]

I was thinking it might have been done with a lockable cover over a breaker to allow multiple people to work on different aspects of a unit so that the 3rd rail can't be powered up again whilst someone is too close to it working on some aspect of a unit

That's the system I've seen used for 25kV supplies. Each person working on the unit attaches their own padlock meaning the breaker can't be switched back on until everyone has finished working and taken their padlock back off.

 

[R4_GRN]

I am a big fan of the H And S act but not how it is applied by some over zealous people who are more interested in protecting their pensions. However surely to remove the slightest chance of someone being killed it should have been made the law that the power is not available in a maintenance shed? The obvious way is to have diesel shunters only moving units completely removes the risk, never mind the cost. It is no consolation if you are killed by a million to one chance. Why do the unions not fight this case I can see the point of this to protect people

 

[Elecman]

I am a big fan of the H And S act but not how it is applied by some over zealous people who are more interested in protecting their pensions. However surely to remove the slightest chance of someone being killed it should have been made the law that the power is not available in a maintenance shed? The obvious way is to have diesel shunters only moving units completely removes the risk, never mind the cost. It is no consolation if you are killed by a million to one chance. Why do the unions not fight this case I can see the point of this to protect people

And how do you propose to power units up for testing during maintenance if you don't have any power available in the shed?

 

[R4_GRN]

Good point elecman, but still up to the designer of the shed to ensure the safety of all the people working inside. I am not in the industry so maybe blinkered but as an engineer responsible for others safety I always completely removed the risk of danger

 

[Elecman]

That is why there are multiple lock offs on the Traction Supply isolator

 

[R4_GRN]

Is that similar to the system I saw on an episode of salvage squad repairing a Blackpool tram? There was an isolator switch with a bracket fitted which had holes for a number of padlocks, each operator had the only key so one person not removing his padlock effectively isolated the tram.
Having said that power was overhead not at ground level so less of a risk neverless the risk should be completely removed.