23.BR.226-6676 KEB
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The KEB 23.BR.226-6676 is a braking resistor from the BR Braking Resistors series with a continuous power rating of 5200 W and a resistance of 6.7 ohms. It has a protection rating of IP20 and supports AC contact ratings of 250 VAC at 3 A and DC contact ratings of 30 VDC at 3 A. The module is equipped with a switch threshold of 240 degrees Celsius and uses NC contact switching.
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Product Description:
The 23.BR.226-6676 is a braking resistor element produced by KEB for the BR Braking Resistors series. Installed across the DC bus of a drive inverter, it converts excess regenerative energy into heat so that motors can decelerate quickly without causing overvoltage faults. The unit supports controlled braking in material-handling lines, presses, and other high-inertia automation systems. Its operation helps prevent excessive DC-bus voltage when a motor returns kinetic energy to the inverter during deceleration.
The resistor can dissipate a continuous load of 5200 W when the duty cycle follows the stated 120-second cycle time. For rapid stops, it withstands a peak load of 86000 W for a maximum on-time of 6 s, allowing the drive to absorb large kinetic surges without exceeding the resistor’s thermal limits. Its wire-wound element has a resistance of 6.7 Ω, which determines the braking current at a given DC-bus voltage. An enclosure rating of IP20 protects against accidental finger contact while permitting convection cooling. The conductor terminals accept two 16 mm² cables, providing sufficient conductor capacity for the braking circuit. A single module is secured through mounting slots measuring 6.5 mm by 10 mm, allowing it to be installed firmly inside a suitable cabinet. Adequate clearance around the enclosure allows heat to escape during repeated braking cycles.
Additional high-energy events are accommodated by a pulse rating of 22000 W for 25 seconds, providing capacity for repetitive deceleration profiles that are less intense but last longer. An embedded thermostat opens at a 240 °C switching threshold, and its normally closed configuration sends a fault signal to the controller if the resistor overheats. The thermal contact can switch mains signals up to 250 VAC / 3 A or control-circuit signals up to 30 VDC / 3 A, so an auxiliary relay may not be necessary. The normally closed contact also allows the controller to detect an open thermostat circuit during operation. Proper monitoring enables the inverter to interrupt braking activity before excessive temperature damages the resistor element or nearby components.
