I-Gard dynamic braking (DB) resistors are designed to prevent an over-voltage trip while slowing a high inertia load, through the use of alternating current (AC) variable speed drives. The dynamic braking resistor is connected across the direct current (DC) bus and can see voltages as high as 1000 volts DC. The resistance value in Ohms determines the amount of braking torque produced and thus the rate at which the motor will stop. This value must be within acceptable limits for the particular drive and application.