Patent ID: 8274297

Claim:
Method for testing power lines and signal lines onboard of an aircraft, the power lines and signal lines connecting a 3-phase AC consumer with the power supply system of the aircraft, the 3 phase AC consumer having separate input terminals onto which, during operation of the 3-phase AC consumer onboard of the aircraft, predetermined voltages of predetermined phase difference are to be applied, the method comprising the steps of: connecting the power lines and signal lines with input terminals of a testing equipment, in place of the 3-phase AC consumer; applying voltages to the power lines; conducting a voltage test by the testing equipment in respect of whether the voltages applied to the power lines are equal to the predetermined voltages; conducting a phase test by the testing equipment simultaneously with the voltage test in respect of whether a phase difference of the voltages applied to the power lines is equal to the predetermined phase difference; and automatically connecting output terminals of the testing equipment with the input terminals of the 3-phase AC consumer, if the voltages applied to the power lines are equal to predetermined voltages and the phase difference of the voltages applied to the power lines is equal to a predetermined phase difference, whereby the voltages and the phase difference applied to the input terminals of the 3-phase AC consumer are monitored by the testing equipment.