Description
DEIF
TYPE: RMF-112D
FREQUENCY RELAY
804538.30
MEANS VOLTAGE: 440VAC
MODULE: 440V
SUPPLY: 24VDC
FREQUENCY: 60 HZ
The DEIF RMF-112D is a frequency relay designed for accurate monitoring and protection of electrical systems aboard commercial and industrial vessels. Operating at a mains voltage of 440VAC with a 24VDC control supply and rated for 60 Hz systems, this relay forms a critical element within marine power management and generator control applications. As part of a Marine Control System, it provides reliable frequency supervision to safeguard generating sets, switchboards, and distribution networks against frequency deviations that could compromise onboard electrical stability.
Key Features
✓ Frequency relay function providing continuous monitoring of AC system frequency, with trip output on deviation beyond set thresholds — essential for protecting generator and bus systems.
✓ Rated mains voltage of 440VAC with a 24VDC auxiliary supply and 60 Hz nominal frequency, as specified in the original product data; additional timing and threshold parameters subject to confirmation from nameplate or datasheet.
✓ Designed for integration within DEIF power management and generator control architectures — compatible with switchboard panels and control systems typical of marine generating plant installations, subject to confirmation of system version.
✓ Intended for installation within protected control enclosures or switchboard cubicles; mounting configuration and environmental ratings should be verified against the specific vessel installation drawings.
✓ Serves as a direct replacement component within existing DEIF-based marine control systems, supporting maintenance, overhaul, and fault rectification programmes without requiring panel redesign — subject to system compatibility confirmation.
Marine Applications
✓ Generator control panels aboard cargo vessels, tankers, and bulk carriers where frequency supervision is required for parallel operation and load sharing.
✓ Main switchboard and emergency switchboard installations on offshore support vessels and platform supply vessels operating 440VAC, 60 Hz distribution systems.
✓ Power management systems on cruise ships, ferries, and RoPax vessels where stable frequency control is critical to operational safety and passenger services.
✓ Auxiliary engine control systems on container ships and general cargo vessels, providing frequency protection during generator start-up, synchronisation, and load transfer sequences.
✓ Retrofit and upgrade projects on vessels with existing DEIF control infrastructure, replacing aged or faulty frequency relays to restore system integrity and compliance.
Why Marine Engineers Choose
The DEIF RMF-112D is a purpose-built marine frequency relay from a globally recognised manufacturer of power management solutions. Its clearly defined voltage and supply ratings make it a dependable choice for engineers maintaining or restoring DEIF-based control systems, offering a like-for-like replacement that minimises downtime and supports continuous vessel operation.
Ideal For
Cargo vessels, tankers, bulk carriers, offshore support vessels, platform supply vessels, cruise ships, ferries, container ships, and any commercial or industrial vessel operating a 440VAC / 60 Hz electrical distribution system with DEIF generator control or power management equipment.
Technical Support & Compliance
Technical assistance is available for remote troubleshooting, onboard commissioning support, integration guidance, and retrofit or upgrade consultations involving this relay and associated DEIF control systems. Repair and bench-testing services may be available subject to confirmation. To confirm compatibility and ensure the correct part is supplied, buyers are encouraged to share nameplate photographs, the full part number (804538.30), relevant system drawings or schematics, the panel or controller model and software version, and vessel name or IMO number where applicable. All compatibility assessments are subject to confirmation based on the information provided.
