Data centers and critical facilities
Low-voltage main distribution where uptime, visibility and maintenance efficiency are important.
Schneider Electric · Air Circuit Breaker
MasterPacT MTZ Air Circuit Breaker
MasterPacT MTZ serves critical low-voltage distribution systems by combining overload, short-circuit and ground-fault protection with metering, diagnostics and communications in one platform.
This page supports range identification and project communication. Confirm the complete catalog number against rated current, breaking level, poles, mounting, control unit and auxiliary supply.
- 630–6300 A
- Rated-current range
- Up to 150 kA
- Breaking capacity, configuration-dependent
- 3P / 4P
- Pole arrangements
- Fixed / drawout
- Mounting arrangements
PRODUCT OVERVIEW
A digital protection platform for critical LV distribution
MasterPacT MTZ serves critical low-voltage distribution systems by combining overload, short-circuit and ground-fault protection with metering, diagnostics and communications in one platform.
The range includes MTZ1, MTZ2 and MTZ3 frames with fixed or drawout mounting, 3- or 4-pole arrangements, and MicroLogic control units for different protection, metering and communication requirements.
- Circuit protectionProtection against overloads, short circuits and ground faults, subject to the selected control unit.
- MicroLogicMicroLogic X / Xi and MicroLogic Active families provide different levels of protection, metering, diagnostics and interface capability.
- Metering and diagnosticsSupports electrical measurement and event or fault information, with functions determined by the control unit and digital modules.
- System integrationCommunication interfaces can connect the breaker to power-monitoring or energy-management architectures; interfaces and protocols are project-specific.
PLATFORM STRUCTURE AND CORE CAPABILITIES
- 01
Three frame sizes
MTZ1, MTZ2 and MTZ3 cover 630–6300 A and are matched by rated current and breaking-performance level.
- 02
MicroLogic control units
Protection, metering, alarms and diagnostics are concentrated in the control unit; confirm actual functions from the complete unit designation.
- 03
Fixed and drawout arrangements
Fixed versions support compact installation; drawout versions support isolation, testing and service, with cradle and secondary interfaces to be checked.
- 04
Communications and digital functions
Communication, wireless connectivity and digital modules can be configured for status visibility, maintenance and energy management.
TECHNICAL OVERVIEW
- Product type
- Low-voltage air circuit-breaker and switch-disconnector platform
- Frames
- MTZ1 / MTZ2 / MTZ3
- Rated-current range
- 630–6300 A
- Operating voltage
- Up to 690 Vac, configuration-dependent
- Breaking capacity
- Up to 150 kA, depending on frame, voltage and performance level
- Poles
- 3P / 4P
- Mounting
- Fixed / drawout
- Control units
- MicroLogic Active / X / Xi
CONTROLS AND ACCESSORIES
- XF closing release
- MX shunt release
- MN undervoltage release
- MCH gear motor
- OF position contacts
- Cradle position contacts
- External neutral current transformer
- Communication interfaces and digital modules
APPLICATIONS
Large buildings and public facilities
Main incomers and bus couplers for commercial campuses, transport, healthcare and public buildings.
Manufacturing and process industries
Main-distribution protection and monitoring for continuous manufacturing and process operations.
Energy and infrastructure
Low-voltage distribution and energy management for water, energy and infrastructure projects.
RECOMMENDED FRAMES
MTZ1
630–1600 A
- Breaking performance
- H1 42 kA; H2 50 kA; H3 66 kA; L1 up to 150 kA at 415 V (rating-dependent)
- Poles
- 3P / 4P
- Mounting
- Fixed / drawout
- Control units
- MicroLogic Active 2.0 / 5.0 / 6.0; MicroLogic X / Xi 2.0 / 5.0 / 6.0 / 7.0
MTZ2
800–4000 A
- Breaking performance
- N1 42 kA; H1 66 kA; H2 100 kA; H3 / L1 up to 150 kA at 440 V (rating-dependent)
- Poles
- 3P / 4P
- Mounting
- Fixed / drawout
- Control units
- MicroLogic Active 2.0 / 5.0 / 6.0; MicroLogic X / Xi 2.0 / 5.0 / 6.0 / 7.0
MTZ3
4000–6300 A
- Breaking performance
- H1 100 kA; H2 150 kA at 440 V
- Poles
- 3P / 4P
- Mounting
- Fixed / drawout
- Control units
- MicroLogic Active 2.0 / 5.0 / 6.0; MicroLogic X / Xi 2.0 / 5.0 / 6.0 / 7.0
This is a range overview, not a complete selection result. Verify the final configuration against the full catalog number, system fault level, selectivity requirements, mounting, cradle interface and control circuit.
