Arc Flash protection
Arc Flash protection
(OP)
I needed some expert comments that is why im sharing this information.
There is a product in the market called intelligent light information system. It is installed in the switchgear in busbar compartments and individually in each CB compartment to protect from internal arc.The smallest of arcs are detected before a catastrophe and tripping signal is given to the cicuit breaker in 6 ms.
Has anyone come across such a product? Will it work as a backup to the Protection relays or the protection relays will become backup protection after its installation.
Cheers
There is a product in the market called intelligent light information system. It is installed in the switchgear in busbar compartments and individually in each CB compartment to protect from internal arc.The smallest of arcs are detected before a catastrophe and tripping signal is given to the cicuit breaker in 6 ms.
Has anyone come across such a product? Will it work as a backup to the Protection relays or the protection relays will become backup protection after its installation.
Cheers






RE: Arc Flash protection
The relay is an ABB REA 101 and uses fiber run thru the breaker cubicles to detect a flash. It is used in conjunction with a current setting, so for the relay to trip it would have to see a flash and a current > normal. The relay will actuate in 2 ms.
RE: Arc Flash protection
In my other life as an ABB service engineer I started up some 15kV switchgear with the older version of this device. I understand this device has been used in Europe for some time.
RE: Arc Flash protection
In additional check VAMP relay site, a very intresting new solutions for arc flashe protection, but base is, as Wbd described.
both of devoces operated in time about 7ms.
Good Luck.
Slava
RE: Arc Flash protection
Schweitzer Engineering also has optical arc-flash detection products. w
RE: Arc Flash protection
For special purposes both VAMP and ABB sell arc eliminators that can extinguish the arc within 2-5ms. With conventional optical sensing based protection the arcing time is the sum of the relay operation time (e.g. 2-15ms) + CB operation time (e.g. 50-90 ms).
In addition to speed, optical sensor based protection provides selectivity, especially when point sensors are used.
RE: Arc Flash protection
I can't find anything in their literature which suggests that they can clear an arcing fault in 2-5ms, but arc detection and trip initiation is quoted as 7-10ms. I don't know of any breakers capable of clearing a fault in 2-5ms, or even close to it.
Have you got any reference material on how they (supposedly) achieve such rapid fault clearance?
----------------------------------
If we learn from our mistakes I'm getting a great education!
RE: Arc Flash protection
RE: Arc Flash protection
RE: Arc Flash protection
----------------------------------
If we learn from our mistakes I'm getting a great education!
RE: Arc Flash protection
RE: Arc Flash protection
RE: Arc Flash protection
And the optical sensor could be worn by a worker.
RE: Arc Flash protection
Bill
--------------------
"Why not the best?"
Jimmy Carter