DEIF RMC-131D/2

Description

1. Product Description

DEIF RMC-131D/2 is a Differential Current Protection Relay developed by DEIF, a global leader in power management and control systems. Designed for critical generator and grid protection, DEIF RMC-131D/2 provides fast-acting fault detection against short circuits, ground faults, and winding leakage currents. This relay leverages three-phase current differential measurement with RMS and peak detection, achieving response times below 50 ms. Ideal for marine power systems, industrial generators, and renewable energy installations, DEIF RMC-131D/2 complies with DNV-GL, ABS, and IEC 60255 standards, ensuring reliable performance even in high-harmonic environments.

2. Product Parameters

RMC-131D2

3. Advantages and Features

• High-Precision Protection: Detects leakage currents as low as 4% of rated current (In), minimizing false triggers in a 6.6 kV container ship power system.
• Dual Measurement Modes: Combines RMS stability for sinusoidal currents with peak detection for ultrafast fault response.
• Adjustable Settings: Customizable thresholds, time delays (T1), and contact latching for diverse grid configurations.
• Enhanced Reliability:
  • 2% hysteresis prevents contact chattering under fluctuating loads.
  • 200 ms power supervision circuit avoids false trips during voltage dips.
• Diagnostic LEDs: Dual-color indicators (green = power, yellow/red = faults) simplify troubleshooting.

4. Application Fields and Case Studies

Key Industries:

• Marine: Generator protection in dynamic positioning systems and hybrid vessels.
• Industrial: Preventing transformer overheating in steel mills with harmonic mitigation.
• Renewables: Grid compliance for offshore wind farms paired with DEIF AGC controllers.

Case Study:
An offshore drilling platform deployed DEIF RMC-131D/2 to protect its 4 MW diesel generators:

• Detected an insulation fault, triggering a shutdown and preventing $2M in generator damage.
• Integrated with SCADA via Modbus RTU, reducing maintenance downtime by 40% through remote fault logging.

5. Competitive Comparison

Compared to generic differential relays:

• 2× Higher Contact Rating (8 A vs. typical 5 A resistive load capacity).
• Wider Temperature Range: Operates reliably at -25°C, outperforming competitors limited to 0°C.
• Certification Edge: Full DNV-GL and ABS compliance for marine applications, unlike industry-standard IEC-only models.
  

  RMC-131D2

6. Selection Guidance

1. System Compatibility: Verify voltage range (AC 690 V or DC 220 V) and CT ratios.
2. Environmental Needs: Opt for IP66 enclosures in humid or offshore environments.
3. Expansion: Add DEIF I/O-16 modules for additional sensor inputs in complex setups.
4. Budget: Prioritize firmware preloaded with DNV-GL settings to reduce commissioning costs.

7. Important Notes

• Installation:
  • Follow NEC/CEC wiring standards (max 4 mm² conductor size).
  • Ensure ground resistance <1 Ω to avoid EMI interference.
• Maintenance:
  • Annual calibration with DEIF CAL-400 toolkit.
  • Inspect contacts every 6 months for oxidation.
• Safety:
  • Disconnect auxiliary power and wait 200 ms before servicing.
  • Avoid deployment in systems with >5 kHz VFDs without EMI shielding.

Shanxi Xinyeda International Trade Co., Ltd. is your trusted partner for DEIF RMC-131D/2 and industrial automation solutions. Visit www.xydcontrol.com or contact us for technical support and lifecycle services.