Characteristics of the inverse time-delay over-current opening releases at the reference temperature of Acti 9 iC60 circuit breakers based on IEC 60898-1 and IEC 60947-2 specifications
The derating table (attached) for the iC60 devices are based on testing with respect to IEC 60898-1 and IEC 60947-2 requirements.
Standard IEC 60898-1:
Standard IEC 60947-2:
40°C for MCB compliant only with IEC 60947-2
Furthermore, the manufacturer is responsible to include the reference temperature of the test at rated current, printed on the device as follows:
For more information concerning the 2 standards, please visit the blog:
https://blog.schneider-electric.com/energy-regulations/2014/02/06/iec-60898-1-iec-60947-2-tale-two-standards/
Standard IEC 60898-1:
- Testing is to be done at temperature reference 30°C
- Conventional non-tripping current 1.13 x In
- Conventional tripping current 1.45 x In
- Conventional time 1h
Standard IEC 60947-2:
- Conventional non-tripping current 1.05 x In
- Conventional tripping current 1.3 x In
- Conventional time 1h
- Each manufacturer defines the ambient reference temperature.
40°C for MCB compliant only with IEC 60947-2
Furthermore, the manufacturer is responsible to include the reference temperature of the test at rated current, printed on the device as follows:
For more information concerning the 2 standards, please visit the blog:
https://blog.schneider-electric.com/energy-regulations/2014/02/06/iec-60898-1-iec-60947-2-tale-two-standards/
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