Description
MERLIN GERIN
MASTERPACT
NW16 H1
CIRCUIT BREAKER
1600A
UI: 1000V & UIMP: 12KV
UE ICU
(V) (KA)
220/440 ~ 65
480/690 ~ 65
ICS=100% ICU
ICW 65KA/1S CAT.B
IEC 60947-2 50/60 HZ
The Merlin Gerin Masterpact NW16 H1 is a high-performance 1600A air circuit breaker (ACB) designed to provide robust overcurrent and short-circuit protection in demanding electrical distribution systems. Rated up to 1000V impulse and certified to IEC 60947-2, this unit is engineered for main switchboard and power distribution panel applications aboard commercial and industrial vessels. As a critical component in marine electrical infrastructure, reliable circuit protection at this power level is essential for safeguarding propulsion auxiliaries, cargo handling equipment, and essential services.
Key Features
✓ Rated 1600A continuous with a short-circuit breaking capacity of 65kA across voltage ranges of 220/440V and 480/690V AC, with ICS equal to 100% of ICU for consistent performance.
✓ Impulse withstand voltage (UIMP) of 12kV and insulation voltage (UI) of 1000V, with short-time withstand rating of 65kA/1s, Category B per IEC 60947-2 — confirming suitability for high-demand switchgear applications.
✓ Compatible with 50/60 Hz electrical systems, making this breaker suitable for vessels operating across international jurisdictions and power infrastructures.
✓ Designed for integration into main and secondary switchboards, motor control centres, and power management panels typical of marine and offshore electrical installations.
✓ As a direct replacement unit, installation and configuration details should be verified against the existing switchboard arrangement; functional compatibility subject to confirmation for specific panel configurations.
Marine Applications
✓ Main switchboard protection on merchant vessels, tankers, bulk carriers, and offshore support vessels where high-amperage feeder circuits require dependable fault interruption.
✓ Feeder and incomer protection within ship power management systems, including generator bus tie and distribution panel arrangements.
✓ Motor control centre (MCC) applications for large auxiliary machinery including cargo pumps, compressors, and HVAC plant.
✓ Offshore platforms and FPSOs where reliable electrical isolation and short-circuit protection are critical to operational safety and uptime.
✓ Cruise ships, ferries, and naval auxiliary vessels requiring certified, high-capacity circuit protection across multi-voltage distribution networks.
Why Marine Engineers Choose
The Masterpact NW16 H1 is a well-established platform in marine electrical engineering, valued for its high breaking capacity, broad voltage compatibility, and compliance with IEC 60947-2 — making it a trusted choice for critical distribution protection across a wide range of vessel types and power systems.
Ideal For
Merchant vessels, tankers, bulk carriers, offshore platforms, FPSOs, cruise ships, ferries, naval auxiliaries, and any seagoing or offshore asset operating high-current electrical distribution systems requiring certified air circuit breaker protection.
Technical Support
Technical support is available for the Merlin Gerin Masterpact NW16 H1, covering onboard installation guidance, switchboard integration, and remote troubleshooting assistance. Our team can assist marine engineers and electrical officers with replacement and commissioning queries related to this air circuit breaker.
