CBHX165C 5R 414 ABB Charging Resistor

The ABB CBHX165C 5R 414 (full part number 3AFE64803689 CBHX165C5R414) is a specialized charging resistor designed and manufactured by ABB for demanding industrial applications. It functions as a crucial power resistor within electrical systems, particularly those incorporating variable speed drives like the ABB ACS800 series.Its primary role is to limit inrush current during the charging of DC link capacitors in power electronic converters. When a drive or converter is powered on, these capacitors act like a short circuit initially, drawing a very large current which can damage rectifiers, fuses, or other components. The charging resistor is temporarily placed in the circuit to restrict this initial current surge, ensuring a smooth and controlled power-up sequence and protecting sensitive internal electronics. Once the capacitors are charged to a sufficient level, the resistor is typically bypassed by a contactor or switch, allowing the full current to flow.

Low Temperature Coefficient: This ensures that its resistance value remains stable across varying temperatures, providing consistent performance.

Corrosion Resistance: Built with materials that offer good resistance to corrosion, contributing to its extended lifespan in industrial settings.

Compact Design: Engineered to be space-efficient, allowing for seamless integration into existing control panels and equipment.

DC Common Bus Applications: In systems with a shared DC bus, the resistor helps manage current flow during power-up or when connecting new components to the bus.Soft Starters: While VSDs offer full motor control, soft starters also manage motor startup. Charging resistors can be employed in such systems to ensure a smooth current ramp-up.Capacitor Bank Protection: Beyond VSDs, any large capacitor bank used for power factor correction or energy storage requires a charging resistor to prevent damaging inrush currents during connection to the power supply.