Any idea what this is?
Discussion
On an electricity pole in a field the Peak District. First thought was some sort of fuse, but there is no electrical connection that I could see, and nothing similar on any of the other nearby poles.
I’d guess it’s about 9” tall, and would need a ladder to reach it.
Edit - damn photo! Green end is at the bottom....
I’d guess it’s about 9” tall, and would need a ladder to reach it.
Edit - damn photo! Green end is at the bottom....
It is in fact an FPI better known as
Fault passage indicator
these were fitted to poles spaced at lets say every 25 - 30 poles on the high voltage system (11,000 volts)
the idea was if there was a fault on the overhead power lines these gizzmos would detect it and start to flash if the fault was past it
Where I worked people living in site of them were asked if the power went off would they look to see if it was flashing and call a dedicated phone line to report it .
If they did we knew to look past that one and check the next one etc. to narrow down the fault location
Good idea but never ever worked !
Fault passage indicator
these were fitted to poles spaced at lets say every 25 - 30 poles on the high voltage system (11,000 volts)
the idea was if there was a fault on the overhead power lines these gizzmos would detect it and start to flash if the fault was past it
Where I worked people living in site of them were asked if the power went off would they look to see if it was flashing and call a dedicated phone line to report it .
If they did we knew to look past that one and check the next one etc. to narrow down the fault location
Good idea but never ever worked !
Ah right.
Googled it.
Weird.
Like these: http://www.nortroll.no/products/linetroll/linetrol... ?
How the hell do they work? Do they just wait for a massive change in field strength to indicate loss of current in cables above?
Googled it.
Weird.
Like these: http://www.nortroll.no/products/linetroll/linetrol... ?
How the hell do they work? Do they just wait for a massive change in field strength to indicate loss of current in cables above?
x type said:
It is in fact an FPI better known as
Fault passage indicator
these were fitted to poles spaced at lets say every 25 - 30 poles on the high voltage system (11,000 volts)
the idea was if there was a fault on the overhead power lines these gizzmos would detect it and start to flash if the fault was past it
Fault passage indicator
these were fitted to poles spaced at lets say every 25 - 30 poles on the high voltage system (11,000 volts)
the idea was if there was a fault on the overhead power lines these gizzmos would detect it and start to flash if the fault was past it
JonChalk said:
Ah right.
Googled it.
Weird.
Like these: http://www.nortroll.no/products/linetroll/linetrol... ?
How the hell do they work? Do they just wait for a massive change in field strength to indicate loss of current in cables above?
Many thanks both! Never noticed anything like it before. It is on a pole does a very narrow lane with hardly any houses or traffic, so maybe it was to allow for quick drive by fault checking.Googled it.
Weird.
Like these: http://www.nortroll.no/products/linetroll/linetrol... ?
How the hell do they work? Do they just wait for a massive change in field strength to indicate loss of current in cables above?
Will now be looking out for these all the time!
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