Bender AKS470 Coupling Device
1. Product Overview
Model: Bender AKS470 (signal coupling device for insulation monitoring system)
Type: signal injection and measurement coupling device for insulation monitoring of ungrounded systems (IT systems)
Core function: realize signal coupling between insulation monitors (such as IR425, IRDH275, etc.) and the circuit under test in IT power distribution systems to ensure accurate measurement of insulation resistance
Typical applications:
Industrial power distribution systems (petrochemical, mining, ship power systems)
Medical IT systems (insulation monitoring of operating rooms and ICUs)
Photovoltaic/energy storage DC systems (used with DC insulation monitors)
2. Core functional characteristics
Electrical parameters
Rated voltage:
AC 0~690V or DC 0~1000V (compatible with AC/DC systems)
Coupled signal frequency: adaptive square wave injection (synchronized with Bender insulation monitors)
Impedance matching:
Built-in high-precision coupling resistors (typical value 150kΩ)
Support system-to-ground capacitance compensation (≤20μF)
Safety and isolation
Electrical isolation:
Input-output isolation voltage: 4kV AC (1 minute withstand voltage)
Complies with IEC 60664-1 reinforced insulation standard
Protection level: IP20 (needs to be installed in the control cabinet)
Compatibility
Applicable monitor models:
Bender IR425, IRDH275, AGH520S and other series
Supported system types:
Single-phase/three-phase AC IT system
DC IT system (photovoltaic, energy storage, etc.)
3. Mechanical and installation specifications
Installation method:
35mm DIN rail installation (standard industrial cabinet configuration)
Compact design (size about 90×70×60mm)
Terminals:
Screw crimping terminals (support wire cross-section 0.5~2.5mm²)
Clear identification: L+/L- (system side), MON+/- (monitor side)
4. Product advantages
✅ High-precision coupling: ensure stable injection of insulation monitor signals and reduce measurement errors
✅ Wide voltage adaptation: covers the mainstream voltage levels of industrial AC/DC
✅ Plug and play: no additional configuration is required, seamless connection with Bender monitors
✅ Safe and reliable: enhanced insulation design, passed multiple international certifications