Description

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Product Title

Bender RCM475LY-13 – Residual Current Monitor / Ground Fault Monitoring Relay

Product Overview

The Bender RCM475LY-13 is an industrial residual current monitoring relay designed for continuous monitoring of leakage and ground fault currents in grounded electrical systems. It is part of the RCM475 series and is widely used in TN and TT power distribution networks to detect insulation deterioration and prevent electrical hazards.

The Bender RCM475LY-13 measures residual current through a measuring current transformer and provides alarm signals when predefined thresholds are exceeded. Unlike conventional protection devices that only trip during faults, this monitor provides early warning of leakage currents, allowing maintenance teams to take corrective action before system failure occurs. With adjustable response values, configurable alarm outputs, and robust industrial design, the device is suitable for critical applications such as motor control centers, generators, industrial power distribution systems, and building electrical infrastructure.

Technical Specifications

Product Model: RCM475LY-13

Brand: Bender

Warranty: One Year

Input Voltage: 90–132 VAC, 50/60 Hz

Operating Temperature: -25°C to +55°C

Storage Temperature: -40°C to +85°C

Response Time: Approx. ≤ 50 ms

Protection Class: IP20 (terminal), IP30 internal components

Accuracy Class: High-precision leakage current monitoring

Output Frequency: DC / 50–400 Hz compatible

Rated Current Range: Residual current detection approx. 10 mA – 10 A

Communication Interface: Relay alarm output / external monitoring interface

Supported Protocols: Standard relay signaling for PLC/DCS integration

Overload Capacity: Designed for continuous monitoring via CT measurement

Dimensions: Approx. 96 × 45 × 72 mm

Main Features and Benefits

High-Sensitivity Leakage Detection:
The device can detect residual currents starting from very low levels (around 10 mA), enabling early detection of insulation degradation and preventing electrical hazards such as equipment damage or fire risk.

Adjustable Alarm Thresholds:
Configurable response values and time delays allow engineers to adapt the monitoring parameters according to system requirements and safety standards.

Reliable Ground Fault Monitoring:
The monitor continuously measures the residual current using a measuring current transformer, ensuring accurate monitoring independent of system voltage and load current.

Industrial-Grade Design:
Built for harsh industrial environments, the relay features durable housing, DIN-rail mounting capability, and reliable alarm relay outputs for integration into control systems.

Fault Memory and Test Functions:
Integrated test and reset functions along with fault memory provide easy system verification and simplified maintenance diagnostics.

Application Scenarios

Industrial Power Distribution:
Used in motor control centers, switchgear panels, and factory power distribution networks to detect ground faults before they cause equipment shutdown.

Power Generation Systems:
Installed in generator and auxiliary systems to monitor residual currents and prevent insulation failures that may affect plant reliability.

Building Electrical Infrastructure:
Applied in large commercial buildings, hospitals, and data centers to monitor leakage currents in electrical circuits and ensure electrical safety compliance.