Description
DEIF
TYPE: RMV-142D
OVER-/UNDERVOLTAGE RELAY
804484.40
MEAS VOLTAGE: 440 VAC
MODULE: 440V
SUPPLY: 24VDC
The DEIF RMV-142D is an over/undervoltage relay designed to monitor and protect marine electrical systems against voltage deviations that fall outside acceptable operating limits. Rated for a measurement voltage of 440 VAC and powered by a 24 VDC supply, this relay plays a critical role in shipboard power management and generator protection. As a core component within the Marine Control System category, it provides automatic detection of voltage anomalies, helping to safeguard onboard machinery, switchboards, and power distribution networks from damage caused by sustained overvoltage or undervoltage conditions.
Key Features
✓ Monitors AC voltage at 440 VAC measurement input, with module rated for 440 V operation and 24 VDC auxiliary supply as specified in the original product data.
✓ Provides dual-function protection by detecting both overvoltage and undervoltage conditions, triggering protective relay outputs to isolate or alarm affected circuits.
✓ Compatible with DEIF control and protection systems; intended for integration within generator control panels, switchboard protection assemblies, and power management architectures — subject to confirmation of system configuration.
✓ Suitable for installation within marine control panels in protected onboard environments; mounting location and enclosure requirements depend on the specific switchboard or control cabinet configuration.
✓ As a dedicated relay module, replacement or retrofit with this unit should be confirmed against the existing system drawing, panel layout, and DEIF system version to ensure compatibility.
Marine Applications
✓ Generator protection panels on merchant vessels, tankers, and offshore support vessels where stable voltage supply is critical to safe operation.
✓ Main switchboard and bus-tie protection systems requiring automatic disconnection or alarm on voltage deviation.
✓ Power management systems on ferries, Ro-Ro vessels, and cruise ships where load balancing and voltage stability are operationally essential.
✓ Automation and control systems on drillships, platform supply vessels, and other DP-equipped vessels where electrical integrity supports dynamic positioning reliability.
✓ Emergency switchboard monitoring on any vessel type where regulatory compliance and continuous power availability are required under SOLAS or class rules.
Why Marine Engineers Choose
The DEIF RMV-142D is a purpose-built relay from a trusted marine automation manufacturer, offering reliable voltage protection in demanding shipboard electrical environments. Its clear specification — 440 VAC measurement voltage and 24 VDC supply — makes it straightforward to assess for direct replacement in existing DEIF-equipped panels, reducing diagnostic time during maintenance or fault rectification.
Ideal For
Merchant vessels, tankers, bulk carriers, offshore support vessels, platform supply vessels, ferries, drillships, and any commercial or industrial vessel operating DEIF power management or generator protection systems requiring 440 V voltage relay protection.
Technical Support & Compliance
Technical assistance is available to support remote troubleshooting, onboard fault diagnosis, commissioning guidance, and retrofit or upgrade planning for DEIF control system installations. Compatibility with your specific panel or system configuration is subject to confirmation. To verify suitability, buyers are encouraged to share nameplate photographs, the original part number (804484.40), relevant system drawings or wiring diagrams, the DEIF panel or controller model and software version, and vessel name or IMO number where applicable. Providing this information at the time of enquiry will help ensure the correct relay module is supplied and that integration into your existing system proceeds without complication.
