Bender IRDH375
Bender
New product
The Bender IRDH375 Isometer® IRDH375-435 is a microprocessor-controlled insulation monitoring device designed for continuous monitoring of insulation resistance in ungrounded AC, DC, and AC/DC electrical systems. The unit is widely installed onboard commercial vessels, offshore installations, power generation plants, and industrial facilities where electrical safety and system reliability are critical requirements. The IRDH375 utilizes Bender's AMPPlus measuring technology and is specifically designed for modern power systems containing converters, variable frequency drives, rectifiers, and DC components.
The primary purpose of the IRDH375 is to detect insulation deterioration and ground faults before they develop into serious electrical failures. By continuously monitoring insulation resistance between conductors and earth, the device provides early warning alarms that allow engineers to identify and rectify faults before system shutdowns occur.
In marine applications, insulation monitoring plays a vital role in maintaining the reliability of propulsion systems, switchboards, emergency power systems, navigation equipment, automation systems, and critical shipboard electrical networks.
The Bender IRDH375 belongs to the renowned ISOMETER® family of insulation monitoring devices developed for IT (unearthed) electrical systems.
The device continuously measures insulation resistance between the electrical network and earth. When insulation resistance falls below preset alarm thresholds, the IRDH375 activates alarm relays and visual indicators, enabling maintenance personnel to locate and correct the fault before equipment damage or operational interruption occurs.
The IRDH375 is suitable for:
The unit incorporates advanced filtering algorithms that allow reliable monitoring even in electrical systems with high leakage capacitance caused by EMC filters, frequency converters, and power electronics. This capability makes it particularly suitable for modern marine electrical installations.
The IRDH375 continuously measures insulation resistance and provides real-time monitoring of electrical system health. This allows early identification of insulation deterioration before faults become critical.
The device utilizes Bender's advanced AMPPlus measuring principle, specifically developed for modern AC, DC, and mixed power systems containing converters and power electronics.
The IRDH375 can monitor AC, DC, and AC/DC systems across a broad voltage range, making it suitable for diverse marine and industrial applications.
Two independently adjustable alarm levels allow operators to establish warning and critical alarm conditions according to operational requirements. Alarm settings can be configured from 1 kΩ up to 10 MΩ.
The monitoring device automatically adapts to system leakage capacitances, ensuring accurate measurements even in complex electrical networks.
Comprehensive self-testing functions continuously verify proper device operation and alert operators if internal faults are detected.
The IRDH375 provides multiple relay outputs for integration with alarm monitoring systems, automation systems, and shipboard control networks.
| Parameter | Specification |
|---|---|
| Product Name | Insulation Monitoring Device |
| Model | IRDH375 |
| Variant | IRDH375-435 |
| Manufacturer | Bender GmbH |
| Product Series | ISOMETER® |
| Monitoring Function | Insulation Resistance Monitoring |
| Application | IT Electrical Systems |
| Voltage Type | AC, DC, AC/DC |
| Measuring Principle | AMPPlus Technology |
| Alarm Threshold Range | 1 kΩ – 10 MΩ |
| Display | LCD Display |
| Alarm Outputs | Multiple Relay Outputs |
| Self-Test Function | Integrated |
| Installation | Switchboard / Control Panel |
Technical specifications may vary depending on configuration and software version.
The Bender IRDH375 Isometer is widely used onboard:
Monitoring insulation resistance of main switchboards, propulsion systems, and auxiliary power networks.
Protection of power distribution systems and electrical equipment.
Continuous monitoring of critical electrical systems in hazardous environments.
Ground fault detection and insulation monitoring for safe vessel operation.
Monitoring insulated power systems and essential safety equipment.
Protection of electrical networks supporting cargo operations and propulsion systems.
Electrical safety monitoring for drilling, production, and support systems.
Monitoring electrical integrity of hotel services, propulsion, and emergency systems.
Continuous protection of sensitive scientific and electrical equipment.
Electrical safety monitoring of power generation and distribution systems.
The IRDH375 can integrate with:
SM MARINE SERVICE™ provides sourcing and supply support for:
Both replacement units and reconditioned equipment may be available depending on customer requirements and stock availability.
SM MARINE SERVICE™ provides complete repair and support services for Bender IRDH375 insulation monitoring systems.
Diagnosis of:
Professional repair of electronic boards, displays, relay circuits, communication modules, and power supplies.
Verification of measurement accuracy and alarm threshold settings.
Complete functional testing and insulation monitoring verification.
Inspection, refurbishment, replacement of defective components, and operational validation.
Support may be available for:
Our engineers provide workshop repairs, onboard attendance, commissioning assistance, troubleshooting support, and system testing worldwide.
SM MARINE SERVICE™
Bangladesh Office
Samir Market, DT Road, Pahartali, Beside CDA Market, Chattogram, Bangladesh
China Warehouse and Support Center
Shanghai, China
SM MARINE SERVICE™ supplies both New Equipment and Reconditioned Equipment depending on customer requirements and budget.
We provide worldwide supply, sourcing, repair, calibration, technical support and spare parts services for marine automation, navigation, communication and marine electronic systems.
Website : https://www.smmarineservice.com
Email : info@smmarineservice.com
WhatsApp and Viber : +8801818929292
Marketing Contact: Nazmul Hasan Bhuiyan
Mobile WhatsApp and Viber : +8801730296909
The Bender IRDH375 Isometer® IRDH375-435 is a proven insulation monitoring solution designed to enhance electrical safety, improve system reliability, and reduce unexpected failures in marine and industrial installations. Its advanced AMPPlus measuring technology, configurable alarm thresholds, self-diagnostics, and compatibility with modern AC/DC power systems make it an ideal choice for shipboard electrical protection applications.
For Bender IRDH375 Isometer supply, repair, calibration, troubleshooting, spare parts, technical documentation support, reconditioned equipment, onboard attendance, and worldwide marine services, contact SM MARINE SERVICE™. Our experienced marine automation and electrical specialists provide professional support for shipowners, ship managers, chief engineers, and marine operators worldwide.
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