Broad knowledge of electrical power tests such as the following: ration tests, polarity and phase relation, resistance, insulation resistance, insulation power-factor, losses and excitation, impedance voltage, temperature rise, lightning impulse, switching impulse, applied voltage, induced voltage, discharge, noise, equipment loss, and tap changer testing. Ensure appropriate application of electrical power tests such as the following: ration tests, polarity and phase relation, resistance, insulation resistance, insulation power-factor, losses and excitation, impedance voltage, temperature rise, lightning impulse, switching impulse, applied voltage, induced voltage, discharge, noise, equipment loss, and tap changer testing.