Description
SCHNEIDER ELECTRIC
MTZ1-08 H1
MASTERPACT
AIR CIRCUIT BREAKER
800 A
MTZ108H12.0X3PED
UI: 1000V~ / UIMP: 12KV
UE 220…690V~ 50/60HZ
ICS = 100% ICU
JCW 42KA/1S
IEC 60947-2
CAT.B
ID: 00003N2112110124LV847600
N800A
N°.: 0229194148
GCR_MTZ_CB
The Schneider Electric Masterpact MTZ1-08 H1 is a high-performance air circuit breaker rated at 800A, designed to provide robust overcurrent and short-circuit protection within low-voltage power distribution systems. Compliant with IEC 60947-2 Category B, this unit is well suited for demanding marine electrical installations where reliable fault isolation and switchgear integrity are operationally critical. As a core component within the Air Circuit Breaker category, it plays a central role in safeguarding main and secondary switchboards, generator panels, and distribution boards aboard vessels.
Key Features
✓ Rated 800A continuous current with an insulation voltage of 1000V AC and an impulse withstand voltage (UIMP) of 12kV, suitable for demanding low-voltage marine applications.
✓ Operating voltage range of 220–690V AC at 50/60Hz with ICS equal to 100% ICU, ensuring full rated breaking capacity is maintained under service conditions.
✓ Short-circuit withstand rating of 42kA for 1 second (Icw), providing robust protection in high-fault-energy environments typical of shipboard power systems.
✓ Certified to IEC 60947-2 Category B, supporting compatibility with a wide range of low-voltage switchgear assemblies and marine electrical distribution panels.
✓ Designed for fixed or withdrawable installation in main switchboards and motor control centres; replacement and maintenance procedures should be carried out in accordance with Schneider Electric documentation and applicable classification requirements.
Marine Applications
✓ Main and emergency switchboard protection aboard commercial cargo vessels, tankers, and bulk carriers where stable power distribution is essential.
✓ Generator incomer and bus-tie protection in shipboard power plants operating on low-voltage distribution networks.
✓ Motor feeder and transformer outgoing circuit protection in engine room distribution boards and auxiliary machinery panels.
✓ Offshore platform and floating production unit (FPSO) electrical systems requiring high short-circuit withstand capability and reliable fault discrimination.
✓ Ferry, cruise vessel, and naval auxiliary electrical installations where IEC-compliant switchgear is required to meet classification society standards.
Why Marine Engineers Choose
The Schneider Electric Masterpact MTZ1 series is recognised for its high breaking capacity, full-rated service performance (ICS = 100% ICU), and compliance with IEC 60947-2, making it a dependable choice for critical power protection duties in marine and offshore electrical systems.
Ideal For
Commercial cargo ships, tankers, bulk carriers, offshore platforms, FPSOs, ferries, cruise vessels, and naval auxiliaries requiring IEC-compliant 800A air circuit breaker protection in low-voltage switchgear installations.
Technical Support
Technical support is available for the Schneider Electric Masterpact MTZ1-08 H1 air circuit breaker, covering onboard installation guidance, fault diagnosis, and remote troubleshooting assistance. Support extends to integration within existing switchgear assemblies and operational queries related to marine power distribution systems.
