Bender IRDH275U-435 ISOMETER Insulation Monitor AC/DC IT Systems
Bender · Sensors & Instrumentation
Description The Bender IRDH275U-435 Insulation Monitor is a high-performance device designed to continuously monitor insulation resistance in unearthed (IT) electrical systems. It provides early detection of insulation faults to prevent equipment damage and ensure operational safety. Technical Specifications Condition New/Never Used Surplus Brand Bender Category Power Monitoring Part Number IRDH275U-435 Subcategory Insulation Monitors Product Type Insulation Monitoring Device (ISOMETER®) System Voltage Range 0–793 VAC / 0–650 VDC Supply Voltage 88–264 VAC / 77–286 VDC Frequency Range 42–460 Hz Measurement Method AMPPlus Insulation Measurement Range 1 kΩ to 10 MΩ Outputs 2 Changeover Relays (Alarm 1 / Alarm 2) Communication RS-485 Display Type LCD with LED Indicators Mounting Type DIN Rail Standards Compliance IEC 61557-8 Weight 1.5 lb (0.7 kg) Information About IRDH275U-435 The IRDH275U-435 is part of Bender’s ISOMETER® IRDH275 series, engineered for insulation monitoring in IT systems including AC, AC/DC, and DC networks. It uses the patented AMPPlus measurement method, enabling accurate detection even in systems with high leakage capacitance or complex loads such as converters and drives. The device supports wide system voltages up to 793 VAC and 650 VDC, making it suitable for diverse industrial applications. It features adjustable alarm thresholds, integrated relay outputs, and communication capability via RS-485 for system integration and diagnostics. Key Features: Insulation Resistance Monitoring: Continuously measures insulation levels to detect faults early Wide System Compatibility: Suitable for AC, DC, and mixed IT systems up to 793 VAC / 650 VDC AMPPlus Measurement Method: Ensures accurate readings in systems with high leakage capacitance Adjustable Alarm Thresholds: Configurable response values for prewarning and fault conditions Dual Relay Outputs: Provides alarm and fault signaling via changeover contacts Communication Interface: RS-485 support for remote monitoring and integration Wide Supply Voltage Range: Operates on 88–264 VAC or 77–286 VDC Integrated Display and Indicators: LCD and LED indicators for real-time system status The IRDH275U-435 delivers the reliability and precision required for insulation monitoring and fault detection in critical electrical systems.
Brand: Bender · Category: Sensors & Instrumentation
Key features
- Insulation Resistance Monitoring: Continuously measures insulation levels to detect faults early
- Wide System Compatibility: Suitable for AC, DC, and mixed IT systems up to 793 VAC / 650 VDC
- AMPPlus Measurement Method: Ensures accurate readings in systems with high leakage capacitance
- Adjustable Alarm Thresholds: Configurable response values for prewarning and fault conditions
- Dual Relay Outputs: Provides alarm and fault signaling via changeover contacts
- Communication Interface: RS-485 support for remote monitoring and integration
- Wide Supply Voltage Range: Operates on 88–264 VAC or 77–286 VDC
- Integrated Display and Indicators: LCD and LED indicators for real-time system status
Specifications
| Manufacturer part number | IRDH275U-435 |
|---|---|
| Condition | New/Never Used Surplus |
| Brand | Bender |
| Category | Power Monitoring |
| Part Number | IRDH275U-435 |
| Subcategory | Insulation Monitors |
| Product Type | Insulation Monitoring Device (ISOMETER®) |
| System Voltage Range | 0–793 VAC / 0–650 VDC |
| Supply Voltage | 88–264 VAC / 77–286 VDC |
| Frequency Range | 42–460 Hz |
| Measurement Method | AMPPlus |
| Insulation Measurement Range | 1 kΩ to 10 MΩ |
| Outputs | 2 Changeover Relays (Alarm 1 / Alarm 2) |
| Communication | RS-485 |
| Display Type | LCD with LED Indicators |
| Mounting Type | DIN Rail |
| Standards Compliance | IEC 61557-8 |
| Weight | 1.5 lb (0.7 kg) |
| Product type | Insulation Monitors |
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