The Haefely-Trench PEFT 4010 is an Electric Fast Transient (EFT/Burst) generator with output voltage from 0.22-4.8kV. Burst duration and frequency are programmable in a wide range for approval work. Integrated 16Aac/10Adc single phase coupler with separate EUT supply switch for safety. Voltage, phase synchronization and spike frequency can be changed during a test. Printer interface for full test report generation.