RCMS490-D-2 BENDER Residual Current Monitor

Description

RCMS490-D-2 BENDER Residual Current Monitor

Product Dimensions：

Product Description (Detailed Explanation)

The RCMS490-D-2 is an advanced 12-channel monitor used for the early detection of insulation deterioration and leakage currents. By connecting external measuring current transformers (CTs), it allows for the continuous surveillance of up to 12 individual sub-circuits or loads within an electrical installation.

The device features an integrated LC display and a user-friendly interface for local parameterization. It serves as a preventive maintenance tool; instead of waiting for a RCD (Residual Current Device) to trip and shut down the process, the RCMS490-D-2 issues an early warning. This allows technicians to locate and fix faults during scheduled downtime, ensuring maximum system availability.

Product Parameters (Technical Specifications)

Product Advantages (Key Benefits)

• Preventive Fire Protection: Detects creeping insulation faults early, significantly reducing the risk of fires caused by electrical leakage.

• Increased System Availability: Provides warnings via relays or communication bus before a traditional protective device trips, preventing costly unplanned production stops.

• High Density Monitoring: Monitors 12 circuits in a single 6-module wide housing, saving substantial space in the distribution board.

• Intelligent Diagnostics: The digital display shows the actual leakage current for each channel, making it easy to identify which specific load is deteriorating.

• Harmonic Filtering: Built-in digital filters allow the device to ignore harmless high-frequency noise while focusing on critical leakage currents.

Precautions (Important Notes)

• Transformer Selection: Only use Bender-approved measuring current transformers (e.g., CTAC or W series). Incorrect CT selection will lead to inaccurate readings or device errors.

• Wiring Geometry: All active conductors ($L1, L2, L3,$ and $N$) must be passed through the measuring CT. The protective earth ($PE$) conductor must never pass through the CT.

• Communication Termination: If connecting multiple units via RS-485 (BMS bus), ensure the 120 $\Omega$ termination resistor is correctly placed at the end of the line.

• DC Current Limitation: This model is a Type A monitor. It cannot detect smooth DC residual currents (Type B). For applications with frequency converters or EV charging, ensure a Type B monitor is not required by local code.

• Relay Configuration: The alarm relays can be set to “N/O” or “N/C” (fail-safe) mode. Verify the configuration to ensure the system reacts correctly to a loss of supply power.

Product Applications (Typical Use Cases)

• Data Centers: Monitoring power distribution units (PDUs) to prevent unexpected server shutdowns due to leakage currents.

• Hospitals & Medical Facilities: Ensuring the electrical safety of non-critical power circuits while maintaining continuity of service.

• Industrial Manufacturing: Monitoring critical motors, heaters, and robotic cells where a sudden trip would cause significant financial loss.

• Public Buildings: Monitoring lighting and HVAC circuits for fire prevention and early maintenance detection.

• Telecommunications: Protecting remote base stations and switching centers from insulation faults caused by environmental factors.

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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