Tripping unit

OMS:

...the whole assembly should be subject to BS EN 61439 and had the appropriate temperature rise test undertaken

I am happy to be corrected but I thought that BS EN 61439 allowed for verification by calculation (I am not an expert - but I know someone who is, so I can always ask....) so it is not necessary to actually perform the temperature rise test, though I am always suspicious of calculations in the place of real performance tests. You are certainly right that it may well need an over-rated device to meet the temperature rise requirements. When 60439 was replaced by 61439 there was a widespread complaint that customers were being forced to buy larger switchboards.


The ABB Sace TMax has been around for a while so it potentially could be a board to BS EN 60439, but only if  it is older than about 15 years.


Edit - just read the latest comment about it being a new board, so ignore the final sentence.

OMS:

...the whole assembly should be subject to BS EN 61439 and had the appropriate temperature rise test undertaken

I am happy to be corrected but I thought that BS EN 61439 allowed for verification by calculation (I am not an expert - but I know someone who is, so I can always ask....) so it is not necessary to actually perform the temperature rise test, though I am always suspicious of calculations in the place of real performance tests. You are certainly right that it may well need an over-rated device to meet the temperature rise requirements. When 60439 was replaced by 61439 there was a widespread complaint that customers were being forced to buy larger switchboards.


The ABB Sace TMax has been around for a while so it potentially could be a board to BS EN 60439, but only if  it is older than about 15 years.


Edit - just read the latest comment about it being a new board, so ignore the final sentence.