Page 553 of Current Catalog by Moeller Electric USA

tripping characteristics moeller faz-nart branch circuit breakers are available with c and d tripping characteristics c-curve devices are suitable for applications where medium levels of inrush current are expected applications include small transformers lighting pilot devices control circuits and coils c-curve devices provide a medium magnetic trip point devices with a d curve are suitable for applications where high levels of inrush current are expected the high magnetic trip point prevents nuisance tripping in high inductive applications such as motors transformers and power supplies even though not required by nec or cec for branch circuit breakers moeller s faz-nart devices are current limiting which means they interrupt fault currents within one half cycle of the fault current limiting devices offer superior protection by reducing peak letthrough current and energy 7200 3600 1200 600 2 2 1 1 tripping characteristic acc to ul 489 csa 22.2 no 235 conventional non-tripping current int 1.0 i n t=40 °c conventional tripping current i t 1.35 i n t 1 h t=25 °c 2.0 i n t 12 120 s t=25 °c 300 120 60 30 3 3 instantaneous tripping acc to iec 60898-1 this graph shows trip-time versus overcurrent for type c and d devices faz-na branch circuit breakers tr ipping time t [sec 10 3 4 type c 5 i n t 0.1 s 10 i n t 0.1 s type d 10 i n t 0.1 s 20 i n t 0.1 s 5 2 1 0.5 0.2 0.1 0.05 0.02 0.01 0.005 0.002 0.001 6 4 4 5 c 5 d 0.0005 1 2 3 4 5 6 7 8 9 10 15 20 30 40 50 multiples of in discover these advanced features available in one two and three poles with c d trip characteristics short circuit rating to 10ka 277v ac and 480y/277v ac for multi-pole ­ choose box terminals awa #18 to #4 or terminals for ring-tongue connectors complete bus bar system available for quickly installing breaker arrays trip-free design breaker cannot be defeated by holding the handle in the on position color coded indicator provides breaker status for easy troubleshooting breaker information printed on the front of the device for quick identification arc chutes quickly extinguish arcs generated by the opening of the contacts under normal or high fault conditions arc chutes and switching mechanism are kept apart for mechanical reliability breakers install on standard din-rail bimetal trip assembly provides reliable overload protection through a broad range of ambient temperatures

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