The MasterPact MTZ2/MTZ3 range of circuit breakers and switch-disconnectors offers current ratings from 800 A to 6,300 A, for AC power systems up to 1,150 Vac.
The MasterPact MTZ2/MTZ3 range is available in the following frame sizes:
oMasterPact MTZ2 for current ratings from 800 A to 4,000 A
oMasterPact MTZ3 for current ratings from 4,000 A to 6,300 A
Each frame size is available in the following power systems:
o3-pole (3P)
o4-pole (4P)
Devices are available in the following installation types:
oFixed-mounted devices
oDrawout devices
In this guide, the term MasterPact MTZ device covers circuit breakers and switch-disconnectors.
The following performance levels are available:
oN1: standard short-circuit level (42 kA) with total selectivity
oH1: high short-circuit level (66 kA) with total selectivity
oH2: very high short-circuit level (100 kA) with very high selectivity (85 kA)
oH2V: very high short-circuit level (100 kA) with very high selectivity (100 kA) (Rated operational voltage Ue limited to 440 Vac)
oH3: extremely high short-circuit level (150 kA) with high selectivity (66 kA)
oL1: extremely high short-circuit level (150 kA) with strong current limitation and significant selectivity (30 kA)
NOTE: The values above correspond to a 440 Vac network, for higher voltage levels the values can be different. Refer to LVPED216026EN MasterPact MTZ Catalogue.
Circuit breakers are fitted with a MicroLogic X control unit.
For full information about available circuit breaker models, frame sizes, interrupting ratings, sensor ratings, and control units, refer to LVPED216026EN MasterPact MTZ Catalogue.
The following performance levels are available:
oNA: Icw = 42 kA/1s
oHA: Icw = 66 kA/1s
oHF: Icw = 85 kA/1s
oHH: Icw = 100 kA/1s
For information about available switch-disconnector models and frame sizes, refer to LVPED216026EN MasterPact MTZ Catalogue.
Neutral Position on 4P Devices
On 4P circuit breakers:
oFor MasterPact MTZ2 N1, H3, L1, H10, the neutral position is on the left side as standard.
oFor MasterPact MTZ2 H1, H2, and H2V, the neutral position is on the left side as standard. A version with neutral position on the right side is available when ordering.
oFor MasterPact MTZ3 H1, H2, the neutral position is on the left side as standard. A version with neutral position on the right side is available when ordering.
On 4P switch-disconnectors:
oFor MasterPact MTZ2 NA, HA, HF, the neutral position can be switched from the left side to the right side using the label provided.
oFor MasterPact MTZ2 HH, the neutral position is on the left side as standard. A version with neutral position on the right side is available when ordering.
oFor MasterPact MTZ3 HA, the neutral position is on the left side as standard.
