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Selection Information

Insulated Case Circuit Breakers

Class 600, 800

			Masterpact 1200 A					Masterpact 6000 A
Circuit Breaker Type			NT-N	NT-H	NT-L1	NT-L	NT-LF a	NW-N	NW-H	NW-L	NW-LF a	NW-H	NW-L	NW-H	NW-L
Number of Poles			3 , 4	3, 4	3, 4	3 , 4	3	3 , 4	3, 4	3 , 4	3	3 , 4	3 , 4	3 , 4	3 , 4
Current Range			100–1200	100–1200	100–1200	100–1200	100–1200	100–2000	100–2000	100–2000	100–2000	640–3000	640–3000	1200–6000	1200–6000
Interrupting Ratings
UL/CSA/NOM Rating (kA RMS) (50/60 Hz)		240 Vac	50	65	100	200	200	65	100	200	200	100	200	100	200
		480Y/277 Vac	50	50	65	100	100	65	100	150	150	100	150	100	150
		480 Vac	50	50	65	100	100	65	100	150	150	100	150	100	150
		600Y/347 Vac	35	—	—	—	—	50	85	100	100	85	100	85	100
		600 Vac	35	—	—	—	—	50	85	100	100	85	100	85	100
DC Ratings		250 Vdc	—	—	—	—	—	—	—	—	—	—	—	—	—
		500 Vdc	—	—	—	—	—	—	—	—	—	—	—	—	—
IECb (kA RMS) Icu/Ics		240 Vac	—	—	—	—	—	—	—	—	—	—	—	—	—
		415 Vac	—	—	—	—	—	—	—	—	—	—	—	—	—
Special Ratings
	Fed. Specs W-C-375B/GEN		—	—	—	—	—	—	—	—	—	—	—	—	—
	HACR (2P, 3P)		—	—	—	—	—	—	—	—	—	—	—	—	—
Connections/Terminations
	Unit Mount		X	X	X	X	X	X	X	X	X	X	X