Description

BENDER IRDH375B‑435 Insulation Monitoring Device

Technical Specifications

• Product Model: IRDH375B‑435
• Brand: BENDER
• Warranty: One Year
• Input Voltage: 24‑240 VAC/DC auxiliary supply
• Operating Temperature: ‑20 °C ~ +60 °C
• Storage Temperature: ‑40 °C ~ +85 °C
• Response Time: Insulation‑fault alarm configurable
• Protection Class: IP20 DIN‑rail mount housing
• Accuracy Class: Industrial insulation‑monitoring grade
• Output Frequency: Not applicable
• Rated Current: 120 mA max auxiliary consumption
• Function: Insulation monitoring relay for IT‑systems; continuously monitors insulation resistance of ungrounded AC‑DC power networks; triggers alarm upon insulation degradation
• Interfaces: Relay alarm outputs, Modbus‑RTU communication, front‑panel display for resistance‑value reading
• System Compatibility: IT‑type ungrounded power distribution systems
• Diagnostics: Device self‑test function, measured‑value display, fault‑LED indicators
• Certifications: CE
• Humidity: 5‑95 % RH, non‑condensing
• Weight: 0.47 kg
• Dimensions: 105 × 72 × 115 mm (W×H×D)
• 

Product Overview

IRDH375B‑435 is BENDER insulation‑monitoring device designed for ungrounded IT power systems. It continuously tracks insulation resistance between live conductors and protective earth. When insulation resistance drops below user‑configured threshold, it activates alarm relays and transmits measured values over Modbus‑RTU for SCADA logging. Front‑panel local display provides on‑site reading of insulation resistance values. Widely used in medical, marine and industrial critical power‑distribution systems. Available as new‑surplus and refurbished spare parts for electrical‑system maintenance.

Application Notes

‑ Mount on standard DIN‑rail inside electrical cabinet. ‑ Set alarm threshold according to local electrical‑system specification. ‑ Execute periodic device self‑test as part of site maintenance procedure. ‑ Typical deployment: marine‑vessel power‑distribution, industrial IT‑network insulation‑supervision spare‑part stocking.