Selecting Masterpact MTZ2 Circuit Breakers

Ratings for UL489 Masterpact MTZ2 Circuit Breakers
Frame Rating		800/1200/1600/2000 A				2500/3000 A
Number of Poles		3/4
Interrupting Rating Code		N	H	L	LF	H	L
Interrupting Current (kAIR)	240 Vac 50/60 Hz	65	100	200	200	100	200
	480 Vac 50/60 Hz	65	100	150	150	100	150
	600 Vac 50/60 Hz	50	85	100	100	85	100
Short-Time Withstand Current (kA)	Vac 50/60 Hz, 0.5 s	42	65	30*	22	65	65
Built-In Instantaneous Override (Peak kA ±10%)		90	90	80	55	150	150
Close and Latch Ratings (Peak kA)	Vac 50/60 Hz	90	90	55*	50	90	90
Tested to show arc flash hazard risk category (NFPA70E)		—	—	—	Yes	—	—
Breaking Time		25 to 30 ms (with no intentional delay) 9 ms for L and LF
Closing Time		70 ms
Sensor Rating		400–800 A / 600–1200 A / 800–1600 A / 1000–2000 A				1200–2500 A / 1600–3000 A
Endurance Rating (C/O Cycles) (with no maintenance)	Mechanical	12,500*	12,500*	12,500*	12,500*	10,000	10,000
Endurance Rating (C/O Cycles) (with no maintenance)	Electrical	2800*	2800*	2800*	2800*	1000	1000

Ratings for ANSI C37 Certified Masterpact MTZ2 Circuit Breakers
Frame Rating		800/1600 A						2000 A					3200/4000 A
Number of Poles		3/4
Interrupting Rating Code		N1	H1	H2	H3	L1* *	L1F*	H1	H2	H3	L1* *	L1F*	H1	H2	H3	L1* *
Interrupting Current (kAIR) (50/60 Hz)	254 Vac	42	65	85	100	200	200	65	85	100	200	200	65	85	100	200
	508 Vac	42	65	85	100	200	200	65	85	100	200	200	65	85	100	200
	635 Vac	42	65	85	85	130	130	65	85	85	130	130	65	85	85	130
Short-Time Withstand Current (kA) (50/60 Hz)	Vac, 0.5 s	42	65	85	85	30	22	65	85	85	30	22	65	85	85	100
Built In Instantaneous Override (Peak kA ±10%)		—	—	—	190	80	55	—	—	190	80	55	—	—	190	270
Close and Latch Ratings (Peak kA)	Vac (50/60 Hz)	90	150	90	90	55	50	150	90	90	55	50	150	90	90	90
Tested to show arc flash hazard risk category (NFPA70E)		—	—	—	—	—	Yes	—	—	—	—	Yes	—	—	—	—
Breaking Time		25 to 30 ms (with no intentional delay) 9 ms for L1 and L1F
Closing Time		70 ms
Sensor Rating		400–800 A, 800–1600 A						1000–2000 A					1600–4000 A
Endurance Rating (C/O Cycles) (with no maintenance)	Mechanical	12,500						10,000					10,000			5000
Endurance Rating (C/O Cycles) (with no maintenance)	Electrical	2800						1000					1000			1000

Ratings for IEC60947–2 Rated Masterpact MTZ2 Circuit Breakers
Frame Rating			800/1000/1250/1600 A					2000 A						2500/3200/4000 A
Interrupting Rating Code			N1	H1	H2	L1	H10	N1	H1	H2	H3	L1	H10	H1	H2	H3	H10
Ultimate Breaking Capacity (kA) 50/60 Hz	Icu	220/415 Vac	42	65	100	150	—	42	65	100	150	150	—	65	100	150	—
		440 Vac	42	65	100	150	—	42	65	100	150	150	—	65	100	150	—
		525 Vac	42	65	85	130	—	42	65	85	130	130	—	65	85	130	—
		690 Vac	42	65	85	100	—	42	65	85	100	100	—	65	85	100	—
		1150 Vac	—	—	—	—	50	—	—	—	—	—	50	—	—	—	50
Service Breaking Capacity (%)	Ics	% Icu	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100
Short-Time Withstand Current (kA)	Icw	Vac 50/60 Hz, 1 s	42	65	85	30	50	42	65	85	65	30	50	65	85	65	50
Short-Time Withstand Current (kA)	Icw	Vac 50/60 Hz, 3 s	22	36	50	30	50	22	36	75	65	30	50	65	75	65	50
Built-In Instantaneous Override (Peak kA ±10%)			—	—	190	80	—	—	—	190	150	80	—	—	190	150	—
Rated making Current (Peak kA) 50/60 Hz	Icm	220/415 Vac	88	143	220	330	—	88	143	220	330	330	—	143	220	330	—
		440 Vac	88	143	220	330	—	88	143	220	330	330	—	143	220	330	—
		525 Vac	88	143	187	286	—	88	143	187	286	286	—	143	187	286	—
		690 Vac	88	143	187	220	—	88	143	187	220	220	—	143	187	220	—
		1150 Vac	—	—	—	—	105	—	—	—	—	—	105	—	—	—	105
Breaking Time		ms	25	25	25	10	25	25	25	25	25	10	25	25	25	25	25
Closing Time		ms	< 70					< 70						< 70
Sensor Rating			400–800 A / 800–1600 A					1000–2000 A						1600–4000 A
Endurance Rating (with no maint.) (C/O Cycles x 1000)		Mechanical	12.5					10						10
		Electrical 440 V	10	10	10	3	—	8	8	8	3	3	—	5	5	1.25	—
		Electrical 1150 V	—	—	—	—	0.5	—	—	—	—	—	0.5	—	—	—	0.5