09.BR.100-6390 KEB
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The KEB 09.BR.100-6390 is a braking resistor from the BR Braking Resistors series with a continuous rating of 90 W and a peak load of 1.5 kW. It offers a resistance of 390 ohms, a voltage class of 400 V, and an IP60 enclosure rating. The unit features a switch load capacity of 250 VAC at 0.5 A and uses an NC type switch with a 160 °C threshold.
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Product Description:
The 09.BR.100-6390 braking resistor is produced by KEB as part of the BR Braking Resistors series. Designed for use with the company’s frequency inverters, the unit converts surplus kinetic energy into heat during motor deceleration, protecting the drive’s DC-link from overvoltage. Its compact form lets it mount close to the power stage so energy can be discharged quickly, making it a straightforward component in regenerative stop cycles across general automation lines.
During regular duty the resistor tolerates a continuous dissipation of 90 W, a figure that defines the steady-state heat it can release without exceeding design temperature limits. For short braking events it accepts up to 1.5 kW, but this overload may only be applied for 6 s within each work interval. That work interval is fixed by a cycle-time basis of 120 s; therefore, system planners can calculate safe braking sequences by comparing the energy produced per stop against the allowed on–off window. The component is classified for inverter DC buses in the 400 V range, aligning it with standard three-phase supplies so no additional voltage adaptation is required.
Its ohmic value is set at 390 Ω, giving a predictable current draw whenever the braking chopper closes. A built-in temperature monitor opens an NC contact once the resistor body reaches 160 °C; the associated switch load of 250 VAC at 0.5 A is sufficient for a fault relay or PLC input. Environmental protection to IP60 keeps dust from settling on the ceramic core while ventilation slots still allow airflow. With a single module count, installation is simple, and wiring is handled by a nickel conductor whose core cross-section measures 1.5 mm². Together these details define thermal response, switching behavior, and enclosure compatibility without revisiting the duty cycle numbers stated earlier.
