Abstract: A tridirectional inverter is disclosed which converts power from the single source into two different widely types of power outputs. This conversion s done by utilizing a magnetic element, i.e., a transformer, alternatively as a filter and as a voltage changing transformer. The function that the magnetic element provides is accomplished by selecting the frequency of the signal that is applied to the magnetic element.

Abstract: A method for indicating electrical breakdown in a nonconductive water coog system for high power electrical equipment at an early stage so as to avoid the danger of accidental faults. The method utilizing a small resistor to generate a detectable voltage when the resistance of the water breaks down, thus degrading from a nonconductive to a conductive state. Once a voltage is detected, the electrical equipment is shut down until the cooling water is made nonconductive again. An apparatus for indicating electrical breakdown in a water cooling system for high power electrical equipment is also provided.