1. (3) GAMBICA/REMA TECHNICAL REPORT, “VARIABLE SPEED DRIVES AND MOTORS—Motor Insulation Voltage Stresses Under PWM Inverter Operation” (2000)
2. (5) IEC 62068-1“Electrical insulation systems (EIS)—Electrical stresses produced by repetitive impulses—Part 1: General method of evaluation of electrical endurance” (2004)