Application Range - Circuit Breakers Table

Breaker Type	Voltage Rating 60 Cycles A.C.	Interrupting Rating in Amperes, RMS Symmetrical		Overcurrent Trip Device Rating - Amperes					Short-time Rating Amperes RMS Symmetrical	Short Circuit Limit for 2-step Cascade Operation Amperes RMS Symmetrical
		With Inst. Trips	Without Inst. Trips	Min. with Instan- taneous Charac- teristic	Min. with 2C Short- time Charac- teristic	Min. with 2B Short- time Charac- teristic	Min. with 2A Short- time Charac- teristic	Max. Breaker Rating
15	600	14,000	9,000	15	100	125	150	225	9,000	25,000
25		22,000	22,000	40	175	200	250	600	22,000	42,000
50		42,000	42,000	200	350	400	500	1600	42,000	85,000
75		65,000	65,000	2000	2000	2000	2000	3000	65,000	85,000
100		85,000	85,000	2000	2000	2000	2000	4000	85,000	85,000
15	480	22,000	9,000	20	100	125	150	225	9,000	42,000
25		30,000	22,000	100	175	200	250	600	22,000	60,000
50		50,000	50,000	400	350	400	500	1600	50,000	85,000
75		65,000	65,000	2000	2000	2000	2000	3000	65,000	85,000
100		85,000	85,000	2000	2000	2000	2000	4000	85,000	85,000
15	240	25,000	9,000	30	100	125	150	225	9,000	50,000
25		42,000	22,000	150	175	200	250	600	22,000	85,000
50		65,000	50,000	600	350	400	500	1600	50,000	100,000
75		85,000	65,000	2000	2000	2000	2000	3000	65,000	130,000
100		130,000	85,000	2000	2000	2000	2000	4000	85,000	130,000