BENDER RCMS490-D-2 Pulsating DC Residual Current Monitor

Description

BENDER RCMS490-D-2 Pulsating DC Residual Current Monitor

Product Dimensions：

The Bender RCMS490-D-2 is a sophisticated Residual Current Monitoring System (RCMS) designed to detect and monitor AC and DC leakage currents in electrical installations. It is a multi-channel device that provides early detection of insulation degradation, helping to prevent unexpected system shutdowns and fire hazards.

Product Detailed Description

The RCMS490-D-2 is a digital, 12-channel residual current monitor. It works by connecting to external through-type current transformers (CTs). The device continuously scans all 12 channels to measure residual currents (I_{\Delta}). It features a built-in display for real-time monitoring and is designed for DIN rail mounting within distribution boards.

Technical Parameters

Product Advantages

• Multi-Channel Efficiency: Monitors up to 12 individual outgoing feeders from a single device, significantly reducing space and hardware costs compared to individual monitors.
• Type B Sensitivity: Capable of detecting smooth DC residual currents, which is essential in modern plants using Variable Frequency Drives (VFDs) and UPS systems.
• Predictive Maintenance: By setting pre-warning thresholds, maintenance teams can identify deteriorating insulation before a main circuit breaker trips, ensuring high system availability.
• Data Integration: The RS-485 interface allows the RCMS to communicate with a central SCADA or building management system for remote logging and alerts.
• Harmonic Analysis: Includes adjustable filters to distinguish between high-frequency “noise” and actual dangerous leakage currents.

Important Considerations & Precautions

• CT Selection: This module requires external Bender W-series or WR-series current transformers. Ensure the CT size matches the cable bundle diameter and the required sensitivity.
• Cable Routing: All live conductors (L1, L2, L3, and N) must pass through the current transformer, but the Protective Earth (PE) conductor must not pass through the CT.
• Nuisance Tripping: In systems with high EMI or large capacitive leakage (common with long cable runs and VFDs), use the built-in frequency filters to prevent false alarms.
• Shielding: To ensure accurate readings over the BMS bus, use shielded twisted-pair cables for RS-485 communication.

Product Applications

The RCMS490-D-2 is used in critical environments where power continuity is vital:

• Data Centers: Monitoring power distribution units (PDUs) to prevent fire hazards and ensure “five-nines” uptime.
• Hospitals: Tracking leakage currents in medical facilities to ensure patient safety and equipment reliability.
• Industrial Automation: Monitoring production lines with numerous VFDs and motors where ground faults could halt expensive processes.
• Renewable Energy: Monitoring solar inverter outputs and battery storage systems for DC leakage.

Shipping Port: Xiamen, China

Payment: Bank of Chicago, Bank of Singapore

Express cooperation: fedex, DHL, UPS and your express account

Service: Professional Sales provides 24 hours /7 days online service

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