BENDER IRDH275W-435 Insulation Monitor

Description

BENDER IRDH275W-435 Insulation Monitor

Product Dimensions：

The BENDER IRDH275W-435 is an advanced ISOMETER® insulation monitoring device designed for ungrounded AC, 3AC, and DC power systems (IT systems). It continuously monitors the insulation resistance of ungrounded networks to ground, providing early warning signals before insulation faults lead to system shutdowns or hazardous conditions.

Product Detailed Description

The IRDH275 series utilizes Bender’s proprietary AMP Plus (Adaptive Measuring Principle) measurement method. This technology allows the device to automatically adapt to system leakage capacitances, making it suitable for modern industrial networks containing variable frequency drives (VFDs), rectifiers, and high DC component loads.

The “-435” suffix denotes a specific factory configuration variant (typically related to supply voltage range, customized response values, or communication options tailored for industrial or marine applications).

Technical Parameters

Product Advantages

• AMP Plus Measurement Technology: Accurately measures insulation resistance even in complex environments with high system leakage capacitance or VFD harmonic noise.
• Predictive Maintenance: Monitors gradual insulation degradation, allowing plant operators to schedule repairs before a second ground fault trips protective breakers.
• Extensive Voltage Range: Direct monitoring of AC systems up to 793 V and DC systems up to 650 V without requiring external coupling units.
• Clear On-Device Display: Real-time resistance values, system status, and alarm history can be accessed directly via the front panel liquid crystal display.
• Self-Monitoring Function: Built-in automatic self-test regularly verifies the integrity of earth connection wiring and internal measurement circuitry.

Important Considerations & Precautions

• IT Systems Only: Designed exclusively for ungrounded (IT) systems. Do not install this device on solidly grounded (TN/TT) power systems.
• Single Device Per System: Only one insulation monitoring device may be connected to an isolated electrical network at a time; connecting multiple units will cause measurement interference and false alarms.
• Coupling Unit Requirement: For system voltages exceeding 793 V AC or 650 V DC, an external Bender coupling unit (such as the AGH series) must be used.
• Ground Connection Integrity: Secure, separate connections to both System Ground (E) and Protective Earth (KE) are required to ensure reliable self-monitoring and accurate readings.

Product Applications

• Industrial Automation & Manufacturing: Continuous ground-fault monitoring in critical continuous-process plants (chemical processing, paper mills, metallurgy).
• Marine & Offshore Platforms: Insulation supervision for vessel power systems, thrusters, and offshore oil/gas rigs.
• Renewable Energy Installations: Earth fault detection in large solar PV arrays and wind turbine power distribution networks.
• Mining & Heavy Machinery: Monitoring mobile power sub-stations, excavators, and underground mining equipment.

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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