Bender IRDH275B-427 Insulation monitoring instrument
1. Product Overview
Model: Bender IRDH275B-427 (belongs to the IRDH275 series, industrial-grade insulation monitoring equipment).
Type: Online insulation resistance monitor for real-time monitoring of the insulation status of ungrounded systems (IT systems).
Typical applications:
Medical facilities (medical IT power distribution systems such as operating rooms and ICUs).
Industrial power systems (such as ungrounded power grids such as mines, ships, and petrochemicals).
Data centers, photovoltaic power generation systems (DC side insulation monitoring).
2. Key features
Monitoring range:
Insulation resistance measurement range: 1 kΩ ~ 10 MΩ (adjustable alarm threshold).
System voltage adaptation: AC 0~275V or DC 0~350V (depending on the model suffix).
Accuracy: ±5% reading (typical value).
Alarm function:
Dual thresholds for pre-alarm (Warning) and main alarm (Fault) can be set (LED display + relay output).
Relay output: 2×SPDT (normally open/normally closed contacts, capacity 5A/250VAC).
Communication interface:
RS-485 Modbus RTU (supports remote monitoring, requires cooperation with the host computer system).
Self-test function: automatically detect sensor disconnection or system failure.
3. Electrical and mechanical specifications
Power supply: 24 VDC or 110/230 VAC (need to confirm the specific model configuration).
Power consumption: ≤5W (typical value).
Protection level: IP20 (need to be installed in the control cabinet to avoid direct exposure).
Installation method: DIN rail installation (standard 35mm rail).
Environmental conditions:
Operating temperature: -20°C to +60°C.
Humidity: ≤95% RH (no condensation).