UL489 and IEC947-2
UL489 and IEC947-2
(OP)
We are currently re-furbishing an offshore platform built to North American standards. Part of re-furb is to equip spare space on an existing 380V switchboard.
The switchgear uses Masterpact MP16H1 ACB's. My problem is that we are based in the UK and the circuit breakers in the original switchgear are obselete. I have been offerd a quote for the same breaker to but can only be made to IEC947-2, the orginal breakers are certified to UL 489 - question is what is the difference between the two? Does anyone have a comparison so I quantify the differnce?
Appreciate anything anyone can offer.
The switchgear uses Masterpact MP16H1 ACB's. My problem is that we are based in the UK and the circuit breakers in the original switchgear are obselete. I have been offerd a quote for the same breaker to but can only be made to IEC947-2, the orginal breakers are certified to UL 489 - question is what is the difference between the two? Does anyone have a comparison so I quantify the differnce?
Appreciate anything anyone can offer.






RE: UL489 and IEC947-2
Since most manufacturers such as Cutler-Hammer and GE build to both standards using the same frames, I doubt there is much difference in the internals of the breakers.
RE: UL489 and IEC947-2
I beleive if it physically fits and electrical characterisrtics are acceptable, you should be able to convince the owner or the authority to accept a breaker meeting IEC. The UL is a well accepted / code recognized standard, but not a Code requirement or a law requirement in the USA. In other words its not illegal to sell non-UL listed items in the USA, but you should inform the people concerned.
RE: UL489 and IEC947-2
I've learned that you can't always appeal to logic when dealing with inspectors.
RE: UL489 and IEC947-2
you last sentence is very true.. unfortunatley lately (in fact one curerntly) I have run into three of them...