BENDER IRDH275-435: Advanced Insulation Monitoring Device for Industrial Power Systems
Product Description
The BENDER IRDH275-435 is a high-performance insulation monitoring device designed to ensure the safety and reliability of ungrounded or high-resistance grounded AC power systems in industrial environments. As a key product in BENDER’s renowned portfolio of electrical safety solutions, it continuously monitors the insulation resistance between live conductors and earth, detecting insulation degradation at an early stage to prevent electrical faults, equipment damage, and potential safety hazards. Engineered with advanced measurement technology and user-friendly features, this device is essential for maintaining uninterrupted operation in critical power systems.
Product Parameters and Specifications
Measurement Range
- Insulation Resistance Monitoring: Measures insulation resistance from 0.5 MΩ to 999 MΩ, with high precision across the entire range. The resolution is 0.1 MΩ for values below 10 MΩ and 1 MΩ for values above 10 MΩ, ensuring accurate detection of even minor insulation changes.
- Leakage Current Monitoring: Capable of monitoring leakage currents up to 10 mA, providing additional insights into insulation integrity.
Power Supply
- Operating Voltage: AC 230 V ± 15% (50/60 Hz) or DC 24 V ± 20%, offering flexibility for integration into various power system configurations.
- Power Consumption: ≤ 10 VA (AC) or ≤ 5 W (DC), ensuring efficient energy usage in continuous operation.
Outputs and Alarms
- Relay Outputs: 2 x changeover relays (NO/NC) with a maximum switching capacity of 250 VAC / 3 A or 30 VDC / 3 A. These relays can be configured to trigger alarms, shutdowns, or notifications when insulation resistance falls below user-defined thresholds.
- Alarm Thresholds: Programmable alarm levels (e.g., 1 MΩ, 5 MΩ, 10 MΩ) to suit specific application requirements, allowing customization based on system criticality.
Communication
- Interface: RS485 with Modbus RTU protocol, enabling seamless integration with SCADA systems, PLCs, or HMI panels for remote monitoring and data logging.
- Data Transmission: Transmits real-time insulation resistance values, alarm status, and device diagnostics for centralized system management.
Environmental and Mechanical
- Operating Temperature: -20°C to +60°C, withstanding extreme temperature fluctuations in industrial settings such as factories, power plants, and outdoor installations.
- Storage Temperature: -40°C to +70°C, ensuring durability during transportation and long-term storage.
- Protection Rating: IP20 (enclosure), suitable for installation in control cabinets or switchgear with protection against solid objects larger than 12 mm.
- Dimensions: 96 mm (width) x 96 mm (height) x 60 mm (depth), with a panel-mount design for easy integration into standard control panels.
- Weight: Approximately 250 g, lightweight for convenient installation.
Series
The IRDH275-435 belongs to BENDER’s IRDH series of insulation monitoring devices, a line renowned for its reliability and precision in insulation monitoring. The IRDH series caters to a wide range of applications, from low-voltage to medium-voltage systems, offering solutions for both ungrounded and grounded networks. Devices in this series share core features such as high measurement accuracy, flexible alarm configuration, and robust communication capabilities, making them trusted choices for industries where electrical safety is paramount. The series emphasizes compliance with international standards (e.g., IEC 61557) to ensure consistent performance and safety across global markets.
Features
Continuous Insulation Monitoring
The IRDH275-435 provides 24/7 real-time monitoring of insulation resistance, enabling early detection of insulation faults such as cable degradation, moisture ingress, or component wear. This proactive approach minimizes the risk of unexpected downtime and electrical accidents.
High Measurement Accuracy
Advanced measurement technology ensures precise insulation resistance readings even in noisy industrial environments with electromagnetic interference (EMI). The device maintains accuracy across varying temperatures and voltage fluctuations, ensuring reliable performance.
Flexible Alarm Configuration
Users can program multiple alarm thresholds to suit specific system requirements, with relay outputs triggering visual/audible alarms, system shutdowns, or notifications to monitoring systems. This customization allows for tailored responses to different levels of insulation degradation.
Remote Monitoring Capability
Equipped with Modbus RTU communication, the device enables remote access to measurement data, alarm logs, and diagnostics via SCADA or HMI systems. This facilitates centralized monitoring of multiple devices across a facility, enhancing maintenance efficiency.
Robust Industrial Design
With a wide operating temperature range and IP20 protection, the IRDH275-435 is built to withstand harsh industrial conditions, including dust, vibrations, and temperature extremes, ensuring long-term reliability.
Function
The primary function of the BENDER IRDH275-435 is to monitor the insulation resistance of ungrounded or high-resistance grounded AC power systems. It measures the resistance between live conductors (phase and neutral) and earth, continuously evaluating the integrity of the insulation. When insulation resistance drops below a predefined threshold, the device triggers alarms to alert operators, enabling timely maintenance or system shutdowns to prevent faults such as short circuits, ground faults, or electric shock. Additionally, it logs insulation data over time, supporting trend analysis to predict insulation degradation and plan preventive maintenance.
Use
In industrial power systems, the IRDH275-435 is used to safeguard critical equipment and personnel by monitoring insulation in systems such as control circuits, motor drives, power distribution networks, and uninterruptible power supplies (UPS). For example, in a manufacturing plant, it monitors the insulation of motor cables to detect wear before a ground fault occurs, preventing unplanned production stops. In a data center, it ensures the insulation integrity of UPS systems, reducing the risk of power outages that could damage sensitive IT equipment.
Application Fields
Power Generation and Distribution
In power plants and substations, the device monitors insulation in auxiliary power systems, control circuits, and transformer connections, ensuring reliable operation of critical infrastructure and preventing costly downtime.
Manufacturing and Automation
In automotive, aerospace, and electronics factories, it safeguards motor drives, robotic systems, and control panels, detecting insulation faults in machinery to avoid production line disruptions and equipment damage.
Healthcare Facilities
In hospitals, the IRDH275-435 monitors insulation in medical equipment power supplies and critical care systems, ensuring patient safety by preventing electrical hazards in sensitive environments.
Data Centers and Telecommunications
It protects UPS systems, server racks, and network infrastructure from insulation failures, maintaining uninterrupted power supply for data storage and communication systems.
Renewable Energy Systems
In solar farms and wind power plants, the device monitors insulation in inverter circuits, cable networks, and energy storage systems, ensuring efficient and safe operation of renewable energy installations.
In summary, the BENDER IRDH275-435 is a vital insulation monitoring device that enhances the safety, reliability, and efficiency of industrial power systems. Its advanced features, accurate measurement capabilities, and flexible integration make it an indispensable tool for protecting critical infrastructure across diverse industries.
There are no reviews yet.