High peak voltages can be experienced at the motor terminals especially when the distance between the inverter (drive) and the motor exceeds about 15 meters. This is typically caused by the voltage doubling phenomenon of a transmission line having unequal line and load impedance’s. Motor terminal voltage can reach twice the DC bus voltage in long lead applications. When the characteristic load impedance is greater than the line impedance, then voltage (and current) is reflected from the load back toward the source (inverter). The absolute peak voltage is equal to the sum of the incident peak voltage traveling toward the motor plus the reflected peak voltage. If the load characteristic impedance is greater than the characteristic line impedance, then the highest peak voltage will be experienced at the load (motor) terminal. If the DC bus voltage is 850 volts, then motor terminal voltage could reach 1700 volts peak.