Is this inside a piece of switchgear, Lyle - because if so, the whole assembly should be subject to BS EN 61439 and had the appropriate temperature rise test undertaken
For info, that standard may have assumed a diversity of 0.6, and in most cases, a 1000A Circuit breaker can't carry 1000A without exceeding a stated temperature rise - you may well need to state a 1250A device set at 1000A to keep within temperature.
If you are putting a sustained 1000A through a 1000A device, it may well be that the manufacturer assumed that load was only a thermally equivalent 60% (which he is entitled to do unless you say differently)
Is this inside a piece of switchgear, Lyle - because if so, the whole assembly should be subject to BS EN 61439 and had the appropriate temperature rise test undertaken
For info, that standard may have assumed a diversity of 0.6, and in most cases, a 1000A Circuit breaker can't carry 1000A without exceeding a stated temperature rise - you may well need to state a 1250A device set at 1000A to keep within temperature.
If you are putting a sustained 1000A through a 1000A device, it may well be that the manufacturer assumed that load was only a thermally equivalent 60% (which he is entitled to do unless you say differently)
