Portable power supply with safety switch

摘要

A portable electric power supply with a main contactor relay connected in electrical series with a manual safety switch and voltage sensing relay contactor between the neutral conductor and a power conductor of the power supply. A voltage sensing relay detects the voltages in the power supply and turns on the voltage sensing relay contactor when the voltages reach a minimum value. The safety switch is wired in parallel with a latching contactor. The main contactor relay activates a main power contactor and the latching contactor when the voltage sensing relay contactor and one or both of the safety switch and latching contactor are activated, and deactivates the main power contactor and latching contactor when the voltage sensing relay contactor is deactivated. When activated, the main power contactor connects power outlets to the neutral conductor and power conductors.