TimeCurrentKurven
TimeCurrentKurven are graphical representations that relate the magnitude of electrical current through a protective device to the time it takes for the device to operate, i.e., to trip or interrupt the circuit. They are used in electrical power systems to characterize and compare protective devices such as fuses and circuit breakers, and to support protection coordination and selectivity.
In a typical TimeCurrentKurven, the horizontal axis shows current as a multiple of the device’s rated current
TimeCurrentKurven are provided by manufacturers and referenced in standards such as IEC 60269 for fuses and
Practical use involves selecting devices whose curves provide the desired coordination under prescribed operating conditions, while