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good day folks
out of interest, if anyone has filled in the “rated time delay” entry on an EIC for a 61008 type-s RCD main switch, what was the value (presuming the standard has a set value/range) used and where from ?
regards
Habs
not quite the same question but at say 5 times the nominal trip current, 100ms is typical , and less than 50ms is a fail and 150msec is also. From here
If cascading earth fault relays I tend to use a rule of 3 for current and time as a starting point for modifications.
so instant 30msec fed from sub-mains supplied by perhaps 100A circuits with protection set to 100mA 0.1second, fed by generator of a few hundred amps, earth protection set to 300mA and 0.3 seconds. There are always exceptions, but it is a place to start from .
mike
not quite the same question but at say 5 times the nominal trip current, 100ms is typical , and less than 50ms is a fail and 150msec is also. From here
If cascading earth fault relays I tend to use a rule of 3 for current and time as a starting point for modifications.
so instant 30msec fed from sub-mains supplied by perhaps 100A circuits with protection set to 100mA 0.1second, fed by generator of a few hundred amps, earth protection set to 300mA and 0.3 seconds. There are always exceptions, but it is a place to start from .
mike
