BENDER 107TL47

Technical Specifications

• Monitored System Voltage: AC 0‑250 V for single‑phase IT medical systems
• Measured Insulation‑Resistance Range: 0.01 MΩ ~ 500 MΩ
• Operating Frequency: 40 Hz ~ 70 Hz
• Device Supply Voltage: AC/DC 24 V auxiliary supply
• Operating Ambient Temperature: ‑10 °C ~ +40 °C
• Enclosure Mounting: DIN‑rail standard cabinet mounting
• Weight: 2.5 kg
• Function Features
• Continuous insulation‑resistance measurement for unearthed IT medical power networks
• Simultaneous monitoring for isolation‑transformer overload current and winding overtemperature
• Two‑wire BMS bus interface for remote alarm indicator panels installed inside medical operating rooms
• Integrated manual self‑test button for periodic functional verification
• Supervisory monitoring for breakage of measuring‑circuit wiring and protective‑earth connections
• Potential‑free alarm‑relay output for building BMS system remote signalling; normally‑closed alarm contact guarantees alarm signal upon device auxiliary‑supply loss
• Local LC display for direct read‑out of insulation‑resistance measured values and fault‑code information Application Scenarios: Hospital operating‑theatre isolated IT power supplies; medical surgical outpatient centres; intensive‑care unit medical power distribution; safety‑critical unearthed medical power‑networks complying with VDE 0100‑710 and IEC 60364‑7‑710 norms.
• Performance Parameters: Insulation‑measurement threshold adjustable; fault‑response time configurable; relay mechanical service‑life ≥100 000 switching cycles.
• Material Composition: Flame‑retardant ABS DIN‑rail housing; FR‑4 printed‑circuit‑board assembly; gold‑plated screw‑terminal contacts; sealed membrane front‑panel push‑buttons.
• Structural Characteristics: Standard DIN‑rail‑mount compact housing; front‑panel liquid‑crystal display, test button and navigation keys; screw‑terminal blocks for power supply, measured‑circuit connection, bus and alarm‑relay wiring.
• Working Principle: Inject low‑amplitude measuring signal into unearthed IT‑network phases; calculate insulation‑resistance value to protective‑earth potential; transformer‑current and temperature‑sensor inputs monitor power‑supply‑transformer operating condition; trigger local LED alarm, display fault message and switch alarm‑relay state once measured values cross threshold limits; transmit alarm information via BMS bus to remote medical‑location annunciator panels.
• Installation Requirements: Install inside medical‑power‑distribution cabinet on standard DIN‑rail; separate measuring‑circuit wiring from high‑power‑load cables; strictly follow medical‑IT‑system wiring‑diagram; connect external temperature‑sensor and current‑transformer inputs as per technical documentation.
• Usage Notes: Execute self‑test function after commissioning and periodic maintenance cycles; verify alarm‑relay logic; do not modify internal circuit parameters without qualified‑technician configuration; keep device ambient‑temperature within rated operating‑range.