arc proof vs arc resistance
arc proof vs arc resistance
(OP)
Hi,
I would like to know if there is any difference in the definition of Arc Proof and Arc Resistance switchgear. To me it sounds the same. I always have understand an arc resistance switchgear as an equipment tested to C37.20.7 or IEC 62271-200. But according to some of my collegues there are diference between an arc proof switchgear and an arc resistance one. I dont know according to what standard they classify a switchgear as an arc proof. Please provided an standard which define arc proof.
Regards and thanks,
Cristian
I would like to know if there is any difference in the definition of Arc Proof and Arc Resistance switchgear. To me it sounds the same. I always have understand an arc resistance switchgear as an equipment tested to C37.20.7 or IEC 62271-200. But according to some of my collegues there are diference between an arc proof switchgear and an arc resistance one. I dont know according to what standard they classify a switchgear as an arc proof. Please provided an standard which define arc proof.
Regards and thanks,
Cristian






RE: arc proof vs arc resistance
A very famous ocean liner was claimed to be "impossible" to sink, yet 100 years ago it went to the bottom of the North Atlantic. Draw your own conclusions about "arc-proof".
----------------------------------
If we learn from our mistakes I'm getting a great education!
RE: arc proof vs arc resistance
But get this, from a Siemens website:
"This test is a voluntary test, either at the discretion of the manufacturer or subject to an agreement between the manufacturer and the user. This test is still considered a special test outside the IEC 60439-1".
That's aboput as toothless of an engineering test specification as one can attain.
"Dear future generations: Please accept our apologies. We were rolling drunk on petroleum."
— Kilgore Trout (via Kurt Vonnegut)
For the best use of Eng-Tips, please click here -> FAQ731-376: Eng-Tips.com Forum Policies
RE: arc proof vs arc resistance
Actually I'm not sure it is entirely Siemens' doing - a large French manufacturer and Another Big Bill both have presence on the standards committee too. Is it any surprise that the the wording allows the manufacturers to claim "arc proof" on their products?
The IEC Technical report can be made fairly onerous, but equally it can be made fairly easy to pass. The client needs to be very specific about what the test requirements are: simply requiring that equipment comply with IEC TR61641 is virtually meaningless.
----------------------------------
If we learn from our mistakes I'm getting a great education!