Masterpact MTZ2/MTZ3 Range

Masterpact MTZ2/MTZ3 Range Description

The Masterpact MTZ2/MTZ3 range of circuit breakers and switches offers current ratings from 800 A to 6,000 A, for AC power systems up to 600 Vac.

The Masterpact MTZ2/MTZ3 range is available in the following frame sizes:

Masterpact MTZ2 for current ratings from 800 A to 4,000 A
Masterpact MTZ3 for current ratings from 4,000 A to 6,000 A

Each frame size is available in the following power systems:

Three-pole (3P)
Four-pole (4P)

Devices are available in the following installation types:

Fixed-mounted devices
Drawout devices

For complete information on available circuit breaker and switch models, frame sizes, interrupting ratings, sensor sizes and trip units, see Masterpact MTZ Circuit Breakers and Switches – Catalog (0614CT1701).

Masterpact MTZ2/MTZ3 Range Convention

In this guide, the term Masterpact MTZ device covers circuit breakers and switches.

Masterpact MTZ2/MTZ3 Circuit Breakers

The following performance levels are available:

N, N1: standard short-circuit level with total discrimination
H1: high short-circuit level with total discrimination
H, H2, H3: very high short-circuit level with very high discrimination
L, L1, LF: extremely high short-circuit level with strong current limitation and significant discrimination

Circuit breakers are fitted with a Micrologic™ X control unit.

Frame Sizes and Ratings

ANSI C37 Certified Masterpact MTZ2 / MTZ3 Circuit Breakers					UL489 Listed Masterpact MTZ2 / MTZ3 Circuit Breakers
Frame Size	Type	Interrupting Ratings			Frame Size	Type	Interrupting Ratings
Frame Size	Type	254 Vac	508 Vac	635 Vac	Frame Size	Type	240 Vac	480 Vac	600 Vac
800 A	N1	42 kA	42 kA	42 kA	800 A	N	65 kA	65 kA	50 kA
	H1, HA	65 kA	65 kA	65 kA		H	100 kA	100 kA	85 kA
	H2	85 kA	85 kA	85 kA		L	200 kA	150 kA	100 kA
	H3	100 kA	100 kA	85 kA		LF	200 kA	150 kA	100 kA
	L1	200 kA	200 kA	130 kA	1200 A	N	65 kA	65 kA	50 kA
	L1F	200 kA	200 kA	130 kA		H	100 kA	100 kA	85 kA
1600 A	N1	42 kA	42 kA	42 kA		L	200 kA	150 kA	100 kA
	H1, HA	65 kA	65 kA	65 kA		LF	200 kA	150 kA	100 kA
	H2	85 kA	85 kA	85 kA	1600 A	N	65 kA	65 kA	50 kA
	H3	100 kA	100 kA	85 kA		H	100 kA	100 kA	85 kA
	L1	200 kA	200 kA	130 kA		L	200 kA	150 kA	100 kA
	L1F	200 kA	200 kA	130 kA		LF	200 kA	150 kA	100 kA
2000 A	H1, HA	65 kA	65 kA	65 kA	2000 A	N	65 kA	65 kA	50 kA
	H2	85 kA	85 kA	85 kA		H	100 kA	100 kA	85 kA
	H3,	100 kA	100 kA	85 kA		L	200 kA	150 kA	100 kA
	L1	200 kA	200 kA	130 kA		LF	200 kA	150 kA	100 kA
	L1F	200 kA	200 kA	130 kA	2500 A	H	100 kA	100 kA	85 kA
3200 A	H1, HA	65 kA	65 kA	65 kA	2500 A	L	200 kA	150 kA	100 kA
	H2	85 kA	85 kA	85 kA	3000A	H	100 kA	100 kA	85 kA
	H3	100 kA	100 kA	85 kA	3000A	L	200 kA	150 kA	100 kA
	L1 (MTZ3 Only)	200 kA	200 kA	130 kA	4000 A	H	100 kA	100 kA	85 kA
4000 A MTZ2	H1, HA	65 kA	65 kA	65 kA	4000 A	L	200 kA	150 kA	100 kA
	H2	85 kA	85 kA	85 kA	5000 A	H	100 kA	100 kA	85 kA
	H3	100 kA	100 kA	85 kA	5000 A	L	200 kA	150 kA	100 kA
4000 A	H2, HA	85 kA	85 kA	85 kA	6000 A	H	100 kA	100 kA	85 kA
	H3	100 kA	100 kA	85 kA	6000 A	L	200 kA	150 kA	100 kA
	L1	200 kA	200 kA	130 kA
5000 A	H2, HA	85 kA	85 kA	85 kA
	H3	100 kA	100 kA	85 kA
	L1	200 kA	200 kA	130 kA
6000 A	H2, HA	85 kA	85 kA	85 kA
	H3	100 kA	100 kA	85 kA
	L1	200 kA	200 kA	130 kA

For full information about available circuit breaker models, frame sizes, interrupting ratings, sensor ratings, and control units, refer to Masterpact MTZ Circuit Breakers and Switches – Catalog (0614CT1701).

Masterpact MTZ2/MTZ3 Switches

Masterpact MTZ2/MTZ3 switches are non-automatic switches. The performance level is HA, indicating no protection.

Frame Sizes and Ratings

ANSI C37 Certified Masterpact MTZ2 / MTZ3 Switches
Frame Size	Type	Interrupting Ratings
Frame Size	Type	254 Vac	508 Vac	635 Vac
800 A	HA	65 kA	65 kA	65 kA
1600 A	HA	65 kA	65 kA	65 kA
2000 A	HA	65 kA	65 kA	65 kA
3200 A	HA	65 kA	65 kA	65 kA
4000 A	HA	85 kA	85 kA	85 kA
5000 A	HA	85 kA	85 kA	85 kA
6000 A	HA	85 kA	85 kA	85 kA

For information about available switch models and frame sizes, refer to Masterpact MTZ Circuit Breakers and Switches – Catalog (0614CT1701).

Masterpact MTZ2/MTZ3 Neutral Position on Four Pole (4P) Devices

On four-pole devices, the neutral is on the left side as standard.

For four-pole circuit breakers with performance levels N and H, a version with neutral on the right side is available.