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Supplemental and Obsolescence Digest 174

Breaking Capacities

 

 

●	CE Marking

●	International products—IEC 60947-2 rated. North American products are dual rated, UL 489 and IEC 60947-2.

●	MCCBs in I-Line® plug-on construction and a complete line of accessories are available. Contact your nearest Field Sales office.

●	Order entry point is Cedar Rapids, Iowa.

 

Table 9.12:

Circuit Breaker Breaking Capacities

Circuit Breaker Cat. Prefix		Current Rating (Amps)	Short-circuit Ratings (415 Vac)			Isolator Rating	Impulse Rating Uimp (kV)	Insulation Rating Ui (Vac)
International	North America		Ultimate	Service	Withstand
			lcu	Ics	Icw
—	FA, FH	15–100 A	10 kA	2.5 kA	N/A	Yes	6	750
—	FA, FH (1 pole)a	15–100 A	18 kA	9 kA	N/A	Yes	6	750
SFA (1 pole)a SFAb	—	16–100 A 16–160 A	25 kA 25 kA	12.5 kA 12.5 kA	N/A N/A	Yes Yes	6 6	750 750
—	FC	15–100 A	10 kA	2.5 kA	N/A	Yes	6	750
SFH	—	16–63 A 80–100 A	65 kA 65 kA	50 kA 33 kA	N/A N/A	Yes Yes	6 6	750 750
—	FI	20–100 A	6 kA	1.5 kA	N/A	Yes	6	750
SFI	—	20–100 A	150 kA	75 kA	N/A	Yes	6	750
—	QBc	70–250 Ad	10 kA	5 kA	N/A	Yes	6	750
—	KA, KH	70–250 A	10 kA	2.5 kA	N/A	Yes	6	750
SKA	—	125–250 A	36 kA	18 kA	N/A	Yes	6	750
SKC SKH	KC	125–250 A 125–250 A	65 kA 50 kA	65 kA 50 kA	N/A N/A	Yes Yes	6 6	750 750
SKI	KI	125–250 A	130 kA	65 kA	N/A	Yes	6	750
—	LA	125–400 A	20 kA	5 kA	N/A	Yes	6	750
SLA	—	250–400 A	36 kA	18 kA	N/A	Yes	6	750
LC	LC	300–400 A 450–630 A	65 kA 65 kA	65 kA 50 kA	N/A N/A	Yes Yes	6 6	750 750
LE LX	LE LX	100–400 A 450–600 A	65 kA 65 kA	65 kA 50 kA	N/A N/A	Yes Yes	6 6	750 750
—	LH	125–400 A	20 kA	5 kA	N/A	Yes	6	750
—	MA MAL	300–800 A 300–1000 A	30 kA 30 kA	30 kA 30 kA	N/A N/A	Yes Yes	6 6	750 750
SMA, SMAL	—	300–800 A 300–1000 A	50 kA 50 kA	25 kA 25 kA	N/A N/A	Yes Yes	6 6	750 750
SMH, SMHL	MH MHL	300–800 A 300–1000 A	65 kA 65 kA	33 kA 33 kA	N/A N/A	Yes Yes	6 6	750 750
ME, MX SNA SNC NE, NX SPA	ME, MX — — NE, NX —	450–800 A 630–1250 A 630–1250 A 600–1200 A 630–2000 A	65 kA 50 kA 70 kA 70 kA 50 kA	33 kA 25 kA 35 kA 35 kA 38 kA	8.0 kA N/A N/A 16.0 N/A	Yes No No No No