Description
RMC-131D/2 – DEIF Generator Differential Current Protection Relay
Product Overview
The DEIF RMC-131D/2 is a high-precision marine and industrial differential current protection relay (ANSI 87) designed for three-phase generator winding fault protection. As a core protective device in power generation systems, this relay accurately detects internal short circuits, winding leakage currents and phase current imbalance by comparing real-time current differences across three phases. Adopting peak-value sampling measurement principle, it achieves ultra-fast fault response and reliable tripping action. The RMC-131D/2 effectively prevents generator burnout and equipment damage caused by internal winding faults, featuring adjustable protection parameters, strong environmental adaptability and marine certification compliance. It ensures safe, stable and long-term operation of marine generators and industrial power generation units.
Technical Specifications
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Brand: DEIF (Denmark)
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Model: RMC-131D/2
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Warranty: One Year
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Condition: 100% New & Original
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Product Type: Generator Differential Current Protection Relay (ANSI 87)
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Core Function: Three-phase differential current detection, generator internal short-circuit & leakage protection
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Measurement Principle: Peak value sampling for fast fault judgment, RMS calculation for sinusoidal current
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Current Setting Range: 100%～400% adjustable differential current threshold
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Response Time: Ultra-fast fault response within 50ms for rapid protection tripping
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Rated Measuring Current: Standard 5A CT secondary current input
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Power Supply: Multi-range power supply: 24VDC / 110VAC / 440VAC wide adaptation
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Relay Output: 2 sets of parallel contact outputs, 8A resistive load capacity (250VAC/24VDC)
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Protection Grade: IP40 housing protection, IP20 terminal safety rating
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Installation Method: Standard 35mm DIN rail or base plate mounting
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Operating Temp: -25℃ to +70℃ marine-grade wide temperature range
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Certification: DNV-GL, ABS, IEC marine industrial certification, fully compliant with ship power system standards
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Structural Feature: Compact modular design, easy wiring, parameter calibration and on-site debugging
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Stability Advantage: Strong anti-electromagnetic interference, stable operation in harsh marine and industrial environments
Application Scenarios
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Marine Generator Protection Systems: The RMC-131D/2 is widely used as dedicated differential protection relay for ship main generators and auxiliary generators. It quickly detects internal winding short circuits and leakage faults of marine generators, cuts off faulty circuits in ultra-short time, avoids generator burnout and power system paralysis, and ensures navigation power supply safety of cargo ships, container ships and offshore vessels.
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Industrial Self-Provided Power Stations: Applied in factory backup generator sets, diesel generator units and distributed power generation systems. It provides precise differential current protection for three-phase generators, solves hidden dangers of internal winding faults during long-term operation, improves the safety redundancy and operational stability of industrial power supply systems.
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Offshore Engineering & Special Vessels: Suitable for offshore platform power generation units, tugboats, engineering ships and marine special power equipment. With professional marine certification, wide temperature adaptability and strong anti-interference performance, it stably operates in high-humidity, high-vibration marine environments, meeting strict safety protection requirements of offshore power systems.
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