BENDER RCM470LY Residual Current Monitor

Description

BENDER RCM470LY Residual Current Monitor

Product Dimensions：

The Bender RCM470LY is a high-performance, modular Residual Current Monitor (RCM) designed to monitor AC and pulsed DC leakage currents in grounded systems (TN and TT systems). It belongs to the LINETRAXX® series and is a critical component for preventative maintenance, as it detects insulation degradation before it leads to a system failure or fire hazard.

Technical Parameters

The RCM470LY is typically used in conjunction with a measuring current transformer (CT) from the CTAC, WR, or WS series.

Key Product Advantages

• Preventative Maintenance: By monitoring leakage current continuously, it allows for “pre-alarms” before the main circuit breaker trips, preventing unexpected downtime.
• High Sensitivity: Detects even small leakage currents (10 mA), making it suitable for both fire protection and personnel safety applications.
• Adjustable Flexibility: Users can fine-tune both the response current and the delay time to prevent nuisance tripping caused by transient surges or motor startups.
• Comprehensive Diagnostics: The LCD provides a clear, real-time value of the residual current, and the device features a self-monitoring function to ensure the CT connection is intact.
• Modular Design: Its compact width (72mm) allows for easy integration into standard distribution boards.

Important Considerations & Precautions

• CT Selection: The device must be used with a compatible Bender measuring current transformer. The accuracy of the system depends on the correct ratio and quality of the CT.
• Conductor Placement: All current-carrying conductors (all phases and the neutral) must pass through the transformer window. The protective earth (PE) conductor must never pass through the transformer.
• System Type: This model is designed for TN and TT systems. It is not intended for use in ungrounded (IT) systems (for IT systems, an Insulation Monitoring Device/IMD like the Bender ISOMETER® is required).
• Testing: It is recommended to use the integrated “Test” button periodically to verify the functionality of the internal relay and electronics.

Product Applications

The RCM470LY is widely used in sectors where electrical reliability is paramount:

• Data Centers: Monitoring leakage in server racks to prevent power interruptions.
• Industrial Automation: Protecting production lines where insulation breakdown could cause fire or damage to sensitive PLCs.
• Hospitals & Labs: Ensuring electrical safety in non-critical medical areas where high leakage current might interfere with sensitive equipment.
• Renewable Energy: Monitoring inverter circuits and distribution boxes in large-scale solar or wind installations.
• Public Infrastructure: Used in lighting systems, tunnels, and railway power distribution to monitor for cable insulation wear.

Shipping Port: Xiamen, China

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