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A braking chopper is an electrical switch that limits the DC bus voltage by switching the braking energy to a resistor where the braking energy is converted to heat. Braking choppers are automatically activated when the actual DC bus voltage exceeds a specified level depending on the nominal voltage of the variable-frequency drive.
Looking for support? Contact us at 815-242-4341 and we can help you with your ABB braking chopper issues or any other ABB part questions.